[v17,03/10] drm/mediatek: Add MT8195 Embedded DisplayPort driver

Commit Message

Rex-BC Chen (陳柏辰) Sept. 1, 2022, 4:41 a.m. UTC

From: Markus Schneider-Pargmann <[e-mail]>

This patch adds a embedded displayport driver for the MediaTek mt8195 SoC.

It supports the MT8195, the embedded DisplayPort units. It offers
DisplayPort 1.4 with up to 4 lanes.

The driver creates a child device for the phy. The child device will
never exist without the parent being active. As they are sharing a
register range, the parent passes a regmap pointer to the child so that
both can work with the same register range. The phy driver sets device
data that is read by the parent to get the phy device that can be used
to control the phy properties.

This driver is based on an initial version by
Jitao shi <[e-mail]>

Signed-off-by: Markus Schneider-Pargmann <[e-mail]>
Signed-off-by: Guillaume Ranquet <[e-mail]>
Signed-off-by: Bo-Chen Chen <[e-mail]>
---
 drivers/gpu/drm/mediatek/Kconfig      |    9 +
 drivers/gpu/drm/mediatek/Makefile     |    2 +
 drivers/gpu/drm/mediatek/mtk_dp.c     | 1999 +++++++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_dp_reg.h |  305 ++++
 4 files changed, 2315 insertions(+)
 create mode 100644 drivers/gpu/drm/mediatek/mtk_dp.c
 create mode 100644 drivers/gpu/drm/mediatek/mtk_dp_reg.h

Comments

CK Hu (胡俊光) Sept. 2, 2022, 7:17 a.m. UTC | #1

Hi, Bo-Chen:

On Thu, 2022-09-01 at 12:41 +0800, Bo-Chen Chen wrote:
> From: Markus Schneider-Pargmann <[e-mail]>
> 
> This patch adds a embedded displayport driver for the MediaTek mt8195
> SoC.
> 
> It supports the MT8195, the embedded DisplayPort units. It offers
> DisplayPort 1.4 with up to 4 lanes.
> 
> The driver creates a child device for the phy. The child device will
> never exist without the parent being active. As they are sharing a
> register range, the parent passes a regmap pointer to the child so
> that
> both can work with the same register range. The phy driver sets
> device
> data that is read by the parent to get the phy device that can be
> used
> to control the phy properties.

Reviewed-by: CK Hu <[e-mail]>

> 
> This driver is based on an initial version by
> Jitao shi <[e-mail]>
> 
> Signed-off-by: Markus Schneider-Pargmann <[e-mail]>
> Signed-off-by: Guillaume Ranquet <[e-mail]>
> Signed-off-by: Bo-Chen Chen <[e-mail]>
> ---
>  drivers/gpu/drm/mediatek/Kconfig      |    9 +
>  drivers/gpu/drm/mediatek/Makefile     |    2 +
>  drivers/gpu/drm/mediatek/mtk_dp.c     | 1999
> +++++++++++++++++++++++++
>  drivers/gpu/drm/mediatek/mtk_dp_reg.h |  305 ++++
>  4 files changed, 2315 insertions(+)
>  create mode 100644 drivers/gpu/drm/mediatek/mtk_dp.c
>  create mode 100644 drivers/gpu/drm/mediatek/mtk_dp_reg.h
> 
> diff --git a/drivers/gpu/drm/mediatek/Kconfig
> b/drivers/gpu/drm/mediatek/Kconfig
> index 2976d21e9a34..e66f4a3b6be0 100644
> --- a/drivers/gpu/drm/mediatek/Kconfig
> +++ b/drivers/gpu/drm/mediatek/Kconfig
> @@ -21,6 +21,15 @@ config DRM_MEDIATEK
>  	  This driver provides kernel mode setting and
>  	  buffer management to userspace.
>  
> +config DRM_MEDIATEK_DP
> +	tristate "DRM DPTX Support for MediaTek SoCs"
> +	depends on DRM_MEDIATEK
> +	select PHY_MTK_DP
> +	select DRM_DISPLAY_HELPER
> +	select DRM_DISPLAY_DP_HELPER
> +	help
> +	  DRM/KMS Display Port driver for MediaTek SoCs.
> +
>  config DRM_MEDIATEK_HDMI
>  	tristate "DRM HDMI Support for Mediatek SoCs"
>  	depends on DRM_MEDIATEK
> diff --git a/drivers/gpu/drm/mediatek/Makefile
> b/drivers/gpu/drm/mediatek/Makefile
> index 6e604a933ed0..3517d1c65cd7 100644
> --- a/drivers/gpu/drm/mediatek/Makefile
> +++ b/drivers/gpu/drm/mediatek/Makefile
> @@ -23,3 +23,5 @@ mediatek-drm-hdmi-objs := mtk_cec.o \
>  			  mtk_hdmi_ddc.o
>  
>  obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mediatek-drm-hdmi.o
> +
> +obj-$(CONFIG_DRM_MEDIATEK_DP) += mtk_dp.o
> diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c
> b/drivers/gpu/drm/mediatek/mtk_dp.c
> new file mode 100644
> index 000000000000..e2ec9b02b1aa
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_dp.c
> @@ -0,0 +1,1999 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2019-2022 MediaTek Inc.
> + * Copyright (c) 2022 BayLibre
> + */
> +
> +#include <drm/display/drm_dp.h>
> +#include <drm/display/drm_dp_helper.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_crtc.h>
> +#include <drm/drm_edid.h>
> +#include <drm/drm_of.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_print.h>
> +#include <drm/drm_probe_helper.h>
> +#include <linux/arm-smccc.h>
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/errno.h>
> +#include <linux/kernel.h>
> +#include <linux/media-bus-format.h>
> +#include <linux/nvmem-consumer.h>
> +#include <linux/of.h>
> +#include <linux/of_irq.h>
> +#include <linux/of_platform.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +#include <linux/soc/mediatek/mtk_sip_svc.h>
> +#include <video/videomode.h>
> +
> +#include "mtk_dp_reg.h"
> +
> +#define MTK_DP_SIP_CONTROL_AARCH32	MTK_SIP_SMC_CMD(0x523)
> +#define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE	(BIT(0) | BIT(5))
> +
> +#define MTK_DP_THREAD_CABLE_STATE_CHG	BIT(0)
> +#define MTK_DP_THREAD_HPD_EVENT		BIT(1)
> +
> +#define MTK_DP_4P1T 4
> +#define MTK_DP_HDE 2
> +#define MTK_DP_PIX_PER_ADDR 2
> +#define MTK_DP_AUX_WAIT_REPLY_COUNT 20
> +#define MTK_DP_TBC_BUF_READ_START_ADDR 0x8
> +#define MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY 5
> +#define MTK_DP_TRAIN_DOWNSCALE_RETRY 10
> +
> +enum {
> +	MTK_DP_CAL_GLB_BIAS_TRIM = 0,
> +	MTK_DP_CAL_CLKTX_IMPSE,
> +	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0,
> +	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1,
> +	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2,
> +	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3,
> +	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0,
> +	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1,
> +	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2,
> +	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3,
> +	MTK_DP_CAL_MAX,
> +};
> +
> +struct mtk_dp_train_info {
> +	bool sink_ssc;
> +	bool cable_plugged_in;
> +	/* link_rate is in multiple of 0.27Gbps */
> +	int link_rate;
> +	int lane_count;
> +	unsigned int channel_eq_pattern;
> +};
> +
> +struct mtk_dp_info {
> +	enum dp_pixelformat format;
> +	struct videomode vm;
> +};
> +
> +struct mtk_dp_efuse_fmt {
> +	unsigned short idx;
> +	unsigned short shift;
> +	unsigned short mask;
> +	unsigned short min_val;
> +	unsigned short max_val;
> +	unsigned short default_val;
> +};
> +
> +struct mtk_dp {
> +	bool enabled;
> +	u8 max_lanes;
> +	u8 max_linkrate;
> +	u8 rx_cap[DP_RECEIVER_CAP_SIZE];
> +	u32 cal_data[MTK_DP_CAL_MAX];
> +	u32 irq_thread_handle;
> +	/* irq_thread_lock is used to protect irq_thread_handle */
> +	spinlock_t irq_thread_lock;
> +
> +	struct device *dev;
> +	struct drm_bridge bridge;
> +	struct drm_bridge *next_bridge;
> +	struct drm_connector *conn;
> +	struct drm_device *drm_dev;
> +	struct drm_dp_aux aux;
> +
> +	struct mtk_dp_info info;
> +	struct mtk_dp_train_info train_info;
> +
> +	struct platform_device *phy_dev;
> +	struct phy *phy;
> +	struct regmap *regs;
> +};
> +
> +static const struct mtk_dp_efuse_fmt
> mtk_dp_efuse_data[MTK_DP_CAL_MAX] = {
> +	[MTK_DP_CAL_GLB_BIAS_TRIM] = {
> +		.idx = 3,
> +		.shift = 27,
> +		.mask = 0x1f,
> +		.min_val = 1,
> +		.max_val = 0x1e,
> +		.default_val = 0xf,
> +	},
> +	[MTK_DP_CAL_CLKTX_IMPSE] = {
> +		.idx = 0,
> +		.shift = 9,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +	[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
> +		.idx = 2,
> +		.shift = 28,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +	[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
> +		.idx = 2,
> +		.shift = 20,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +	[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
> +		.idx = 2,
> +		.shift = 12,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +	[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
> +		.idx = 2,
> +		.shift = 4,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +	[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
> +		.idx = 2,
> +		.shift = 24,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +	[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
> +		.idx = 2,
> +		.shift = 16,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +	[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
> +		.idx = 2,
> +		.shift = 8,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +	[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
> +		.idx = 2,
> +		.shift = 0,
> +		.mask = 0xf,
> +		.min_val = 1,
> +		.max_val = 0xe,
> +		.default_val = 0x8,
> +	},
> +};
> +
> +static struct regmap_config mtk_dp_regmap_config = {
> +	.reg_bits = 32,
> +	.val_bits = 32,
> +	.reg_stride = 4,
> +	.max_register = SEC_OFFSET + 0x90,
> +	.name = "mtk-dp-registers",
> +};
> +
> +static struct mtk_dp *mtk_dp_from_bridge(struct drm_bridge *b)
> +{
> +	return container_of(b, struct mtk_dp, bridge);
> +}
> +
> +static u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset)
> +{
> +	u32 read_val;
> +	int ret;
> +
> +	ret = regmap_read(mtk_dp->regs, offset, &read_val);
> +	if (ret) {
> +		dev_err(mtk_dp->dev, "Failed to read register 0x%x:
> %d\n",
> +			offset, ret);
> +		return 0;
> +	}
> +
> +	return read_val;
> +}
> +
> +static int mtk_dp_write(struct mtk_dp *mtk_dp, u32 offset, u32 val)
> +{
> +	int ret = regmap_write(mtk_dp->regs, offset, val);
> +
> +	if (ret)
> +		dev_err(mtk_dp->dev,
> +			"Failed to write register 0x%x with value
> 0x%x\n",
> +			offset, val);
> +	return ret;
> +}
> +
> +static int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset,
> +			      u32 val, u32 mask)
> +{
> +	int ret = regmap_update_bits(mtk_dp->regs, offset, mask, val);
> +
> +	if (ret)
> +		dev_err(mtk_dp->dev,
> +			"Failed to update register 0x%x with value
> 0x%x, mask 0x%x\n",
> +			offset, val, mask);
> +	return ret;
> +}
> +
> +static void mtk_dp_bulk_16bit_write(struct mtk_dp *mtk_dp, u32
> offset, u8 *buf,
> +				    size_t length)
> +{
> +	int i;
> +
> +	/* 2 bytes per register */
> +	for (i = 0; i < length; i += 2) {
> +		u32 val = buf[i] | (i + 1 < length ? buf[i + 1] << 8 :
> 0);
> +
> +		if (mtk_dp_write(mtk_dp, offset + i * 2, val))
> +			return;
> +	}
> +}
> +
> +static void mtk_dp_msa_bypass_enable(struct mtk_dp *mtk_dp, bool
> enable)
> +{
> +	u32 mask = HTOTAL_SEL_DP_ENC0_P0 | VTOTAL_SEL_DP_ENC0_P0 |
> +		   HSTART_SEL_DP_ENC0_P0 | VSTART_SEL_DP_ENC0_P0 |
> +		   HWIDTH_SEL_DP_ENC0_P0 | VHEIGHT_SEL_DP_ENC0_P0 |
> +		   HSP_SEL_DP_ENC0_P0 | HSW_SEL_DP_ENC0_P0 |
> +		   VSP_SEL_DP_ENC0_P0 | VSW_SEL_DP_ENC0_P0;
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3030, enable ? 0 :
> mask, mask);
> +}
> +
> +static void mtk_dp_set_msa(struct mtk_dp *mtk_dp)
> +{
> +	struct drm_display_mode mode;
> +	struct videomode *vm = &mtk_dp->info.vm;
> +
> +	drm_display_mode_from_videomode(vm, &mode);
> +
> +	/* horizontal */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3010,
> +			   mode.htotal, HTOTAL_SW_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3018,
> +			   vm->hsync_len + vm->hback_porch,
> +			   HSTART_SW_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
> +			   vm->hsync_len, HSW_SW_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
> +			   0, HSP_SW_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3020,
> +			   vm->hactive, HWIDTH_SW_DP_ENC0_P0_MASK);
> +
> +	/* vertical */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3014,
> +			   mode.vtotal, VTOTAL_SW_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_301C,
> +			   vm->vsync_len + vm->vback_porch,
> +			   VSTART_SW_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
> +			   vm->vsync_len, VSW_SW_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
> +			   0, VSP_SW_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3024,
> +			   vm->vactive, VHEIGHT_SW_DP_ENC0_P0_MASK);
> +
> +	/* horizontal */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3064,
> +			   vm->hactive, HDE_NUM_LAST_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3154,
> +			   mode.htotal, PGEN_HTOTAL_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3158,
> +			   vm->hfront_porch,
> +			   PGEN_HSYNC_RISING_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_315C,
> +			   vm->hsync_len,
> +			   PGEN_HSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3160,
> +			   vm->hback_porch + vm->hsync_len,
> +			   PGEN_HFDE_START_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3164,
> +			   vm->hactive,
> +			   PGEN_HFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
> +
> +	/* vertical */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3168,
> +			   mode.vtotal,
> +			   PGEN_VTOTAL_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_316C,
> +			   vm->vfront_porch,
> +			   PGEN_VSYNC_RISING_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3170,
> +			   vm->vsync_len,
> +			   PGEN_VSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3174,
> +			   vm->vback_porch + vm->vsync_len,
> +			   PGEN_VFDE_START_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3178,
> +			   vm->vactive,
> +			   PGEN_VFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
> +}
> +
> +static int mtk_dp_set_color_format(struct mtk_dp *mtk_dp,
> +				   enum dp_pixelformat color_format)
> +{
> +	u32 val;
> +
> +	/* update MISC0 */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
> +			   color_format << DP_TEST_COLOR_FORMAT_SHIFT,
> +			   DP_TEST_COLOR_FORMAT_MASK);
> +
> +	switch (color_format) {
> +	case DP_PIXELFORMAT_YUV422:
> +		val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR422;
> +		break;
> +	case DP_PIXELFORMAT_RGB:
> +		val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_RGB;
> +		break;
> +	default:
> +		drm_warn(mtk_dp->drm_dev, "Unsupported color format:
> %d\n",
> +			 color_format);
> +		return -EINVAL;
> +	}
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
> +			   val, PIXEL_ENCODE_FORMAT_DP_ENC0_P0_MASK);
> +	return 0;
> +}
> +
> +static void mtk_dp_set_color_depth(struct mtk_dp *mtk_dp)
> +{
> +	/* Only support 8 bits currently */
> +	/* Update MISC0 */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
> +			   DP_MSA_MISC_8_BPC, DP_TEST_BIT_DEPTH_MASK);
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
> +			   VIDEO_COLOR_DEPTH_DP_ENC0_P0_8BIT,
> +			   VIDEO_COLOR_DEPTH_DP_ENC0_P0_MASK);
> +}
> +
> +static void mtk_dp_config_mn_mode(struct mtk_dp *mtk_dp)
> +{
> +	/* 0: hw mode, 1: sw mode */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
> +			   0, VIDEO_M_CODE_SEL_DP_ENC0_P0_MASK);
> +}
> +
> +static void mtk_dp_set_sram_read_start(struct mtk_dp *mtk_dp, u32
> val)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
> +			   val, SRAM_START_READ_THRD_DP_ENC0_P0_MASK);
> +}
> +
> +static void mtk_dp_setup_encoder(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
> +			   VIDEO_MN_GEN_EN_DP_ENC0_P0,
> +			   VIDEO_MN_GEN_EN_DP_ENC0_P0);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040,
> +			   SDP_DOWN_CNT_DP_ENC0_P0_VAL,
> +			   SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
> +			   SDP_DOWN_CNT_IN_HBLANK_DP_ENC1_P0_VAL,
> +			   SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK)
> ;
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3300,
> +			   VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_VAL << 8,
> +			   VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
> +			   FIFO_READ_START_POINT_DP_ENC1_P0_VAL << 12,
> +			   FIFO_READ_START_POINT_DP_ENC1_P0_MASK);
> +	mtk_dp_write(mtk_dp, MTK_DP_ENC1_P0_3368, DP_ENC1_P0_3368_VAL);
> +}
> +
> +static void mtk_dp_pg_enable(struct mtk_dp *mtk_dp, bool enable)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3038,
> +			   enable ? VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK :
> 0,
> +			   VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31B0,
> +			   PGEN_PATTERN_SEL_VAL << 4,
> PGEN_PATTERN_SEL_MASK);
> +}
> +
> +static void mtk_dp_aux_irq_clear(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_write(mtk_dp, MTK_DP_AUX_P0_3640, DP_AUX_P0_3640_VAL);
> +}
> +
> +static void mtk_dp_aux_set_cmd(struct mtk_dp *mtk_dp, u8 cmd, u32
> addr)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3644,
> +			   cmd, MCU_REQUEST_COMMAND_AUX_TX_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3648,
> +			   addr,
> MCU_REQUEST_ADDRESS_LSB_AUX_TX_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_364C,
> +			   addr >> 16,
> MCU_REQUEST_ADDRESS_MSB_AUX_TX_P0_MASK);
> +}
> +
> +static void mtk_dp_aux_clear_fifo(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
> +			   MCU_ACK_TRAN_COMPLETE_AUX_TX_P0,
> +			   MCU_ACK_TRAN_COMPLETE_AUX_TX_P0 |
> +			   PHY_FIFO_RST_AUX_TX_P0_MASK |
> +			   MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
> +}
> +
> +static void mtk_dp_aux_request_ready(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3630,
> +			   AUX_TX_REQUEST_READY_AUX_TX_P0,
> +			   AUX_TX_REQUEST_READY_AUX_TX_P0);
> +}
> +
> +static void mtk_dp_aux_fill_write_fifo(struct mtk_dp *mtk_dp, u8
> *buf,
> +				       size_t length)
> +{
> +	mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_AUX_P0_3708, buf,
> length);
> +}
> +
> +static void mtk_dp_aux_read_rx_fifo(struct mtk_dp *mtk_dp, u8 *buf,
> +				    size_t length, int read_delay)
> +{
> +	int read_pos;
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
> +			   0, AUX_RD_MODE_AUX_TX_P0_MASK);
> +
> +	for (read_pos = 0; read_pos < length; read_pos++) {
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
> +				   AUX_RX_FIFO_READ_PULSE_TX_P0,
> +				   AUX_RX_FIFO_READ_PULSE_TX_P0);
> +
> +		/* Hardware needs time to update the data */
> +		usleep_range(read_delay, read_delay * 2);
> +		buf[read_pos] = (u8)(mtk_dp_read(mtk_dp,
> MTK_DP_AUX_P0_3620) &
> +				     AUX_RX_FIFO_READ_DATA_AUX_TX_P0_MA
> SK);
> +	}
> +}
> +
> +static void mtk_dp_aux_set_length(struct mtk_dp *mtk_dp, size_t
> length)
> +{
> +	if (length > 0) {
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
> +				   (length - 1) << 12,
> +				   MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
> +				   0,
> +				   AUX_NO_LENGTH_AUX_TX_P0 |
> +				   AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
> +				   AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
> +	} else {
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
> +				   AUX_NO_LENGTH_AUX_TX_P0,
> +				   AUX_NO_LENGTH_AUX_TX_P0 |
> +				   AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
> +				   AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
> +	}
> +}
> +
> +static int mtk_dp_aux_wait_for_completion(struct mtk_dp *mtk_dp,
> bool is_read)
> +{
> +	int wait_reply = MTK_DP_AUX_WAIT_REPLY_COUNT;
> +
> +	while (--wait_reply) {
> +		u32 aux_irq_status;
> +
> +		if (is_read) {
> +			u32 fifo_status = mtk_dp_read(mtk_dp,
> MTK_DP_AUX_P0_3618);
> +
> +			if (fifo_status &
> +			    (AUX_RX_FIFO_WRITE_POINTER_AUX_TX_P0_MASK |
> +			     AUX_RX_FIFO_FULL_AUX_TX_P0_MASK)) {
> +				return 0;
> +			}
> +		}
> +
> +		aux_irq_status = mtk_dp_read(mtk_dp,
> MTK_DP_AUX_P0_3640);
> +		if (aux_irq_status &
> AUX_RX_AUX_RECV_COMPLETE_IRQ_AUX_TX_P0)
> +			return 0;
> +
> +		if (aux_irq_status & AUX_400US_TIMEOUT_IRQ_AUX_TX_P0)
> +			return -ETIMEDOUT;
> +
> +		/* Give the hardware a chance to reach completion
> before retrying */
> +		usleep_range(100, 500);
> +	}
> +
> +	return -ETIMEDOUT;
> +}
> +
> +static int mtk_dp_aux_do_transfer(struct mtk_dp *mtk_dp, bool
> is_read, u8 cmd,
> +				  u32 addr, u8 *buf, size_t length)
> +{
> +	int ret;
> +	u32 reply_cmd;
> +
> +	if (is_read && (length > DP_AUX_MAX_PAYLOAD_BYTES ||
> +			(cmd == DP_AUX_NATIVE_READ && !length)))
> +		return -EINVAL;
> +
> +	if (!is_read)
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
> +				   AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0,
> +				   AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0);
> +
> +	/* We need to clear fifo and irq before sending commands to the
> sink device. */
> +	mtk_dp_aux_clear_fifo(mtk_dp);
> +	mtk_dp_aux_irq_clear(mtk_dp);
> +
> +	mtk_dp_aux_set_cmd(mtk_dp, cmd, addr);
> +	mtk_dp_aux_set_length(mtk_dp, length);
> +
> +	if (!is_read) {
> +		if (length)
> +			mtk_dp_aux_fill_write_fifo(mtk_dp, buf,
> length);
> +
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
> +				   AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_
> P0_MASK,
> +				   AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_
> P0_MASK);
> +	}
> +
> +	mtk_dp_aux_request_ready(mtk_dp);
> +
> +	/* Wait for feedback from sink device. */
> +	ret = mtk_dp_aux_wait_for_completion(mtk_dp, is_read);
> +
> +	reply_cmd = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3624) &
> +		    AUX_RX_REPLY_COMMAND_AUX_TX_P0_MASK;
> +
> +	if (ret || reply_cmd) {
> +		u32 phy_status = mtk_dp_read(mtk_dp,
> MTK_DP_AUX_P0_3628) &
> +				 AUX_RX_PHY_STATE_AUX_TX_P0_MASK;
> +		if (phy_status != AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE) {
> +			drm_err(mtk_dp->drm_dev,
> +				"AUX Rx Aux hang, need SW reset\n");
> +			return -EIO;
> +		}
> +
> +		return -ETIMEDOUT;
> +	}
> +
> +	if (!length) {
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
> +				   0,
> +				   AUX_NO_LENGTH_AUX_TX_P0 |
> +				   AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
> +				   AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
> +	} else if (is_read) {
> +		int read_delay;
> +
> +		if (cmd == (DP_AUX_I2C_READ | DP_AUX_I2C_MOT) ||
> +		    cmd == DP_AUX_I2C_READ)
> +			read_delay = 500;
> +		else
> +			read_delay = 100;
> +
> +		mtk_dp_aux_read_rx_fifo(mtk_dp, buf, length,
> read_delay);
> +	}
> +
> +	return 0;
> +}
> +
> +static void mtk_dp_set_swing_pre_emphasis(struct mtk_dp *mtk_dp, int
> lane_num,
> +					  int swing_val, int
> preemphasis)
> +{
> +	u32 lane_shift = lane_num * DP_TX1_VOLT_SWING_SHIFT;
> +
> +	dev_dbg(mtk_dp->dev,
> +		"link training: swing_val = 0x%x, pre-emphasis =
> 0x%x\n",
> +		swing_val, preemphasis);
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
> +			   swing_val << (DP_TX0_VOLT_SWING_SHIFT +
> lane_shift),
> +			   DP_TX0_VOLT_SWING_MASK << lane_shift);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
> +			   preemphasis << (DP_TX0_PRE_EMPH_SHIFT +
> lane_shift),
> +			   DP_TX0_PRE_EMPH_MASK << lane_shift);
> +}
> +
> +static void mtk_dp_reset_swing_pre_emphasis(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
> +			   0,
> +			   DP_TX0_VOLT_SWING_MASK |
> +			   DP_TX1_VOLT_SWING_MASK |
> +			   DP_TX2_VOLT_SWING_MASK |
> +			   DP_TX3_VOLT_SWING_MASK |
> +			   DP_TX0_PRE_EMPH_MASK |
> +			   DP_TX1_PRE_EMPH_MASK |
> +			   DP_TX2_PRE_EMPH_MASK |
> +			   DP_TX3_PRE_EMPH_MASK);
> +}
> +
> +static u32 mtk_dp_swirq_get_clear(struct mtk_dp *mtk_dp)
> +{
> +	u32 irq_status = mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_35D0) &
> +			 SW_IRQ_FINAL_STATUS_DP_TRANS_P0_MASK;
> +
> +	if (irq_status) {
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
> +				   irq_status,
> SW_IRQ_CLR_DP_TRANS_P0_MASK);
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
> +				   0, SW_IRQ_CLR_DP_TRANS_P0_MASK);
> +	}
> +
> +	return irq_status;
> +}
> +
> +static u32 mtk_dp_hwirq_get_clear(struct mtk_dp *mtk_dp)
> +{
> +	u32 irq_status = (mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3418) &
> +			  IRQ_STATUS_DP_TRANS_P0_MASK) >> 12;
> +
> +	if (irq_status) {
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
> +				   irq_status,
> IRQ_CLR_DP_TRANS_P0_MASK);
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
> +				   0, IRQ_CLR_DP_TRANS_P0_MASK);
> +	}
> +
> +	return irq_status;
> +}
> +
> +static void mtk_dp_hwirq_enable(struct mtk_dp *mtk_dp, bool enable)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
> +			   enable ? 0 :
> +			   IRQ_MASK_DP_TRANS_P0_DISC_IRQ |
> +			   IRQ_MASK_DP_TRANS_P0_CONN_IRQ |
> +			   IRQ_MASK_DP_TRANS_P0_INT_IRQ,
> +			   IRQ_MASK_DP_TRANS_P0_MASK);
> +}
> +
> +static void mtk_dp_initialize_settings(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_342C,
> +			   XTAL_FREQ_DP_TRANS_P0_DEFAULT,
> +			   XTAL_FREQ_DP_TRANS_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3540,
> +			   FEC_CLOCK_EN_MODE_DP_TRANS_P0,
> +			   FEC_CLOCK_EN_MODE_DP_TRANS_P0);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31EC,
> +			   AUDIO_CH_SRC_SEL_DP_ENC0_P0,
> +			   AUDIO_CH_SRC_SEL_DP_ENC0_P0);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
> +			   0, SDP_VSYNC_RISING_MASK_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_IRQ_MASK,
> +			   IRQ_MASK_AUX_TOP_IRQ, IRQ_MASK_AUX_TOP_IRQ);
> +}
> +
> +static void mtk_dp_initialize_hpd_detect_settings(struct mtk_dp
> *mtk_dp)
> +{
> +	u32 val;
> +	/* Debounce threshold */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
> +			   8, HPD_DEB_THD_DP_TRANS_P0_MASK);
> +
> +	val = (HPD_INT_THD_DP_TRANS_P0_LOWER_500US |
> +	       HPD_INT_THD_DP_TRANS_P0_UPPER_1100US) << 4;
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
> +			   val, HPD_INT_THD_DP_TRANS_P0_MASK);
> +
> +	/*
> +	 * Connect threshold 1.5ms + 5 x 0.1ms = 2ms
> +	 * Disconnect threshold 1.5ms + 5 x 0.1ms = 2ms
> +	 */
> +	val = (5 << 8) | (5 << 12);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
> +			   val,
> +			   HPD_DISC_THD_DP_TRANS_P0_MASK |
> +			   HPD_CONN_THD_DP_TRANS_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3430,
> +			   HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT,
> +			   HPD_INT_THD_ECO_DP_TRANS_P0_MASK);
> +}
> +
> +static void mtk_dp_initialize_aux_settings(struct mtk_dp *mtk_dp)
> +{
> +	/* modify timeout threshold = 0x1595 */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_360C,
> +			   AUX_TIMEOUT_THR_AUX_TX_P0_VAL,
> +			   AUX_TIMEOUT_THR_AUX_TX_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3658,
> +			   0, AUX_TX_OV_EN_AUX_TX_P0_MASK);
> +	/* 25 for 26M */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3634,
> +			   AUX_TX_OVER_SAMPLE_RATE_FOR_26M << 8,
> +			   AUX_TX_OVER_SAMPLE_RATE_AUX_TX_P0_MASK);
> +	/* 13 for 26M */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3614,
> +			   AUX_RX_UI_CNT_THR_AUX_FOR_26M,
> +			   AUX_RX_UI_CNT_THR_AUX_TX_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_37C8,
> +			   MTK_ATOP_EN_AUX_TX_P0,
> +			   MTK_ATOP_EN_AUX_TX_P0);
> +}
> +
> +static void mtk_dp_initialize_digital_settings(struct mtk_dp
> *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
> +			   0, VBID_VIDEO_MUTE_DP_ENC0_P0_MASK);
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3368,
> +			   BS2BS_MODE_DP_ENC1_P0_VAL << 12,
> +			   BS2BS_MODE_DP_ENC1_P0_MASK);
> +
> +	/* dp tx encoder reset all sw */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
> +			   DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0,
> +			   DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
> +
> +	/* Wait for sw reset to complete */
> +	usleep_range(1000, 5000);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
> +			   0, DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
> +}
> +
> +static void mtk_dp_digital_sw_reset(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
> +			   DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0,
> +			   DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
> +
> +	/* Wait for sw reset to complete */
> +	usleep_range(1000, 5000);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
> +			   0,
> DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
> +}
> +
> +static void mtk_dp_set_lanes(struct mtk_dp *mtk_dp, int lanes)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35F0,
> +			   lanes == 0 ? 0 : DP_TRANS_DUMMY_RW_0,
> +			   DP_TRANS_DUMMY_RW_0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
> +			   lanes, LANE_NUM_DP_ENC0_P0_MASK);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4,
> +			   lanes << 2, LANE_NUM_DP_TRANS_P0_MASK);
> +}
> +
> +static void mtk_dp_get_calibration_data(struct mtk_dp *mtk_dp)
> +{
> +	const struct mtk_dp_efuse_fmt *fmt;
> +	struct device *dev = mtk_dp->dev;
> +	struct nvmem_cell *cell;
> +	u32 *cal_data = mtk_dp->cal_data;
> +	u32 *buf;
> +	int i;
> +	size_t len;
> +
> +	cell = nvmem_cell_get(dev, "dp_calibration_data");
> +	if (IS_ERR(cell)) {
> +		dev_warn(dev, "Failed to get nvmem cell
> dp_calibration_data\n");
> +		goto use_default_val;
> +	}
> +
> +	buf = (u32 *)nvmem_cell_read(cell, &len);
> +	nvmem_cell_put(cell);
> +
> +	if (IS_ERR(buf) || ((len / sizeof(u32)) != 4)) {
> +		dev_warn(dev, "Failed to read nvmem_cell_read\n");
> +
> +		if (!IS_ERR(buf))
> +			kfree(buf);
> +
> +		goto use_default_val;
> +	}
> +
> +	for (i = 0; i < MTK_DP_CAL_MAX; i++) {
> +		fmt = &mtk_dp_efuse_data[i];
> +		cal_data[i] = (buf[fmt->idx] >> fmt->shift) & fmt-
> >mask;
> +
> +		if (cal_data[i] < fmt->min_val || cal_data[i] > fmt-
> >max_val) {
> +			dev_warn(mtk_dp->dev, "Invalid efuse data, idx
> = %d\n", i);
> +			kfree(buf);
> +			goto use_default_val;
> +		}
> +	}
> +	kfree(buf);
> +
> +	return;
> +
> +use_default_val:
> +	dev_warn(mtk_dp->dev, "Use default calibration data\n");
> +	for (i = 0; i < MTK_DP_CAL_MAX; i++)
> +		cal_data[i] = mtk_dp_efuse_data[i].default_val;
> +}
> +
> +static void mtk_dp_set_calibration_data(struct mtk_dp *mtk_dp)
> +{
> +	u32 *cal_data = mtk_dp->cal_data;
> +
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_DPAUX_TX,
> +			   cal_data[MTK_DP_CAL_CLKTX_IMPSE] << 20,
> +			   RG_CKM_PT0_CKTX_IMPSEL);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_BIAS_GEN_00,
> +			   cal_data[MTK_DP_CAL_GLB_BIAS_TRIM] << 16,
> +			   RG_XTP_GLB_BIAS_INTR_CTRL);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
> +			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] <<
> 12,
> +			   RG_XTP_LN0_TX_IMPSEL_PMOS);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
> +			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] <<
> 16,
> +			   RG_XTP_LN0_TX_IMPSEL_NMOS);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
> +			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] <<
> 12,
> +			   RG_XTP_LN1_TX_IMPSEL_PMOS);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
> +			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] <<
> 16,
> +			   RG_XTP_LN1_TX_IMPSEL_NMOS);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
> +			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] <<
> 12,
> +			   RG_XTP_LN2_TX_IMPSEL_PMOS);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
> +			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] <<
> 16,
> +			   RG_XTP_LN2_TX_IMPSEL_NMOS);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
> +			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] <<
> 12,
> +			   RG_XTP_LN3_TX_IMPSEL_PMOS);
> +	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
> +			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] <<
> 16,
> +			   RG_XTP_LN3_TX_IMPSEL_NMOS);
> +}
> +
> +static int mtk_dp_phy_configure(struct mtk_dp *mtk_dp,
> +				u32 link_rate, int lane_count)
> +{
> +	int ret;
> +	union phy_configure_opts phy_opts = {
> +		.dp = {
> +			.link_rate =
> drm_dp_bw_code_to_link_rate(link_rate) / 100,
> +			.set_rate = 1,
> +			.lanes = lane_count,
> +			.set_lanes = 1,
> +			.ssc = mtk_dp->train_info.sink_ssc,
> +		}
> +	};
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
> DP_PWR_STATE_BANDGAP,
> +			   DP_PWR_STATE_MASK);
> +
> +	ret = phy_configure(mtk_dp->phy, &phy_opts);
> +	if (ret)
> +		return ret;
> +
> +	mtk_dp_set_calibration_data(mtk_dp);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
> +			   DP_PWR_STATE_BANDGAP_TPLL_LANE,
> DP_PWR_STATE_MASK);
> +
> +	return 0;
> +}
> +
> +static void mtk_dp_set_idle_pattern(struct mtk_dp *mtk_dp, bool
> enable)
> +{
> +	u32 val = POST_MISC_DATA_LANE0_OV_DP_TRANS_P0_MASK |
> +		  POST_MISC_DATA_LANE1_OV_DP_TRANS_P0_MASK |
> +		  POST_MISC_DATA_LANE2_OV_DP_TRANS_P0_MASK |
> +		  POST_MISC_DATA_LANE3_OV_DP_TRANS_P0_MASK;
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3580,
> +			   enable ? val : 0, val);
> +}
> +
> +static void mtk_dp_train_set_pattern(struct mtk_dp *mtk_dp, int
> pattern)
> +{
> +	/* TPS1 */
> +	if (pattern == 1)
> +		mtk_dp_set_idle_pattern(mtk_dp, false);
> +
> +	mtk_dp_update_bits(mtk_dp,
> +			   MTK_DP_TRANS_P0_3400,
> +			   pattern ? BIT(pattern - 1) << 12 : 0,
> +			   PATTERN1_EN_DP_TRANS_P0_MASK |
> +			   PATTERN2_EN_DP_TRANS_P0_MASK |
> +			   PATTERN3_EN_DP_TRANS_P0_MASK |
> +			   PATTERN4_EN_DP_TRANS_P0_MASK);
> +}
> +
> +static void mtk_dp_set_enhanced_frame_mode(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
> +			   ENHANCED_FRAME_EN_DP_ENC0_P0,
> +			   ENHANCED_FRAME_EN_DP_ENC0_P0);
> +}
> +
> +static void mtk_dp_training_set_scramble(struct mtk_dp *mtk_dp, bool
> enable)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3404,
> +			   enable ? DP_SCR_EN_DP_TRANS_P0_MASK : 0,
> +			   DP_SCR_EN_DP_TRANS_P0_MASK);
> +}
> +
> +static void mtk_dp_video_mute(struct mtk_dp *mtk_dp, bool enable)
> +{
> +	struct arm_smccc_res res;
> +	u32 val = VIDEO_MUTE_SEL_DP_ENC0_P0 |
> +		  (enable ? VIDEO_MUTE_SW_DP_ENC0_P0 : 0);
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
> +			   val,
> +			   VIDEO_MUTE_SEL_DP_ENC0_P0 |
> +			   VIDEO_MUTE_SW_DP_ENC0_P0);
> +
> +	arm_smccc_smc(MTK_DP_SIP_CONTROL_AARCH32,
> +		      MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE, enable,
> +		      0, 0, 0, 0, 0, &res);
> +
> +	dev_dbg(mtk_dp->dev, "smc cmd: 0x%x, p1: 0x%x, ret: 0x%lx-
> 0x%lx\n",
> +		MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE, enable, res.a0,
> res.a1);
> +}
> +
> +static void mtk_dp_power_enable(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
> +			   0, SW_RST_B_PHYD);
> +
> +	/* Wait for power enable */
> +	usleep_range(10, 200);
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
> +			   SW_RST_B_PHYD, SW_RST_B_PHYD);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
> +			   DP_PWR_STATE_BANDGAP_TPLL,
> DP_PWR_STATE_MASK);
> +	mtk_dp_write(mtk_dp, MTK_DP_1040,
> +		     RG_DPAUX_RX_VALID_DEGLITCH_EN |
> RG_XTP_GLB_CKDET_EN |
> +		     RG_DPAUX_RX_EN);
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_0034, 0,
> DA_CKM_CKTX0_EN_FORCE_EN);
> +}
> +
> +static void mtk_dp_power_disable(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_write(mtk_dp, MTK_DP_TOP_PWR_STATE, 0);
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_0034,
> +			   DA_CKM_CKTX0_EN_FORCE_EN,
> DA_CKM_CKTX0_EN_FORCE_EN);
> +
> +	/* Disable RX */
> +	mtk_dp_write(mtk_dp, MTK_DP_1040, 0);
> +	mtk_dp_write(mtk_dp, MTK_DP_TOP_MEM_PD,
> +		     0x550 | FUSE_SEL | MEM_ISO_EN);
> +}
> +
> +static void mtk_dp_initialize_priv_data(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp->train_info.link_rate = DP_LINK_BW_5_4;
> +	mtk_dp->train_info.lane_count = mtk_dp->max_lanes;
> +	mtk_dp->train_info.cable_plugged_in = false;
> +
> +	mtk_dp->info.format = DP_PIXELFORMAT_RGB;
> +	memset(&mtk_dp->info.vm, 0, sizeof(struct videomode));
> +}
> +
> +static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp)
> +{
> +	u32 sram_read_start = min_t(u32,
> MTK_DP_TBC_BUF_READ_START_ADDR,
> +				    mtk_dp->info.vm.hactive /
> +				    mtk_dp->train_info.lane_count /
> +				    MTK_DP_4P1T / MTK_DP_HDE /
> +				    MTK_DP_PIX_PER_ADDR);
> +	mtk_dp_set_sram_read_start(mtk_dp, sram_read_start);
> +	mtk_dp_setup_encoder(mtk_dp);
> +}
> +
> +static void mtk_dp_set_tx_out(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_setup_tu(mtk_dp);
> +}
> +
> +static void mtk_dp_train_update_swing_pre(struct mtk_dp *mtk_dp, int
> lanes,
> +					  u8 dpcd_adjust_req[2])
> +{
> +	int lane;
> +
> +	for (lane = 0; lane < lanes; ++lane) {
> +		u8 val;
> +		u8 swing;
> +		u8 preemphasis;
> +		int index = lane / 2;
> +		int shift = lane % 2 ?
> DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : 0;
> +
> +		swing = (dpcd_adjust_req[index] >> shift) &
> +			DP_ADJUST_VOLTAGE_SWING_LANE0_MASK;
> +		preemphasis = ((dpcd_adjust_req[index] >> shift) &
> +			       DP_ADJUST_PRE_EMPHASIS_LANE0_MASK) >>
> +			      DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT;
> +		val = swing << DP_TRAIN_VOLTAGE_SWING_SHIFT |
> +		      preemphasis << DP_TRAIN_PRE_EMPHASIS_SHIFT;
> +
> +		if (swing == DP_TRAIN_VOLTAGE_SWING_LEVEL_3)
> +			val |= DP_TRAIN_MAX_SWING_REACHED;
> +		if (preemphasis == 3)
> +			val |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
> +
> +		mtk_dp_set_swing_pre_emphasis(mtk_dp, lane, swing,
> preemphasis);
> +		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_LANE0_SET
> + lane,
> +				   val);
> +	}
> +}
> +
> +static void mtk_dp_pattern(struct mtk_dp *mtk_dp, bool is_tps1)
> +{
> +	int pattern;
> +	unsigned int aux_offset;
> +
> +	if (is_tps1) {
> +		pattern = 1;
> +		aux_offset = DP_LINK_SCRAMBLING_DISABLE |
> DP_TRAINING_PATTERN_1;
> +	} else {
> +		aux_offset = mtk_dp->train_info.channel_eq_pattern;
> +
> +		switch (mtk_dp->train_info.channel_eq_pattern) {
> +		case DP_TRAINING_PATTERN_4:
> +			pattern = 4;
> +			break;
> +		case DP_TRAINING_PATTERN_3:
> +			pattern = 3;
> +			aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
> +			break;
> +		case DP_TRAINING_PATTERN_2:
> +		default:
> +			pattern = 2;
> +			aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
> +			break;
> +		}
> +	}
> +
> +	mtk_dp_train_set_pattern(mtk_dp, pattern);
> +	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
> aux_offset);
> +}
> +
> +static int mtk_dp_train_setting(struct mtk_dp *mtk_dp, u8
> target_link_rate,
> +				u8 target_lane_count)
> +{
> +	int ret;
> +
> +	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LINK_BW_SET,
> target_link_rate);
> +	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LANE_COUNT_SET,
> +			   target_lane_count |
> DP_LANE_COUNT_ENHANCED_FRAME_EN);
> +
> +	if (mtk_dp->train_info.sink_ssc)
> +		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_DOWNSPREAD_CTRL,
> +				   DP_SPREAD_AMP_0_5);
> +
> +	mtk_dp_set_lanes(mtk_dp, target_lane_count / 2);
> +	ret = mtk_dp_phy_configure(mtk_dp, target_link_rate,
> target_lane_count);
> +	if (ret)
> +		return ret;
> +
> +	dev_dbg(mtk_dp->dev,
> +		"Link train target_link_rate = 0x%x, target_lane_count
> = 0x%x\n",
> +		target_link_rate, target_lane_count);
> +
> +	return 0;
> +}
> +
> +static int mtk_dp_train_cr(struct mtk_dp *mtk_dp, u8
> target_lane_count)
> +{
> +	u8 lane_adjust[2] = {};
> +	u8 link_status[DP_LINK_STATUS_SIZE] = {};
> +	u8 prev_lane_adjust = 0xff;
> +	int train_retries = 0;
> +	int voltage_retries = 0;
> +
> +	mtk_dp_pattern(mtk_dp, true);
> +
> +	/* In DP spec 1.4, the retry count of CR is defined as 10. */
> +	do {
> +		train_retries++;
> +		if (!mtk_dp->train_info.cable_plugged_in) {
> +			mtk_dp_train_set_pattern(mtk_dp, 0);
> +			return -ENODEV;
> +		}
> +
> +		drm_dp_dpcd_read(&mtk_dp->aux,
> DP_ADJUST_REQUEST_LANE0_1,
> +				 lane_adjust, sizeof(lane_adjust));
> +		mtk_dp_train_update_swing_pre(mtk_dp,
> target_lane_count,
> +					      lane_adjust);
> +
> +		drm_dp_link_train_clock_recovery_delay(&mtk_dp->aux,
> +						       mtk_dp->rx_cap);
> +
> +		/* check link status from sink device */
> +		drm_dp_dpcd_read_link_status(&mtk_dp->aux,
> link_status);
> +		if (drm_dp_clock_recovery_ok(link_status,
> +					     target_lane_count)) {
> +			dev_dbg(mtk_dp->dev, "Link train CR pass\n");
> +			return 0;
> +		}
> +
> +		/*
> +		 * In DP spec 1.4, if current voltage level is the same
> +		 * with previous voltage level, we need to retry 5
> times.
> +		 */
> +		if (prev_lane_adjust == link_status[4]) {
> +			voltage_retries++;
> +			/*
> +			 * Condition of CR fail:
> +			 * 1. Failed to pass CR using the same voltage
> +			 *    level over five times.
> +			 * 2. Failed to pass CR when the current
> voltage
> +			 *    level is the same with previous voltage
> +			 *    level and reach max voltage level (3).
> +			 */
> +			if (voltage_retries >
> MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY ||
> +			    (prev_lane_adjust &
> DP_ADJUST_VOLTAGE_SWING_LANE0_MASK) == 3) {
> +				dev_dbg(mtk_dp->dev, "Link train CR
> fail\n");
> +				break;
> +			}
> +		} else {
> +			/*
> +			 * If the voltage level is changed, we need to
> +			 * re-calculate this retry count.
> +			 */
> +			voltage_retries = 0;
> +		}
> +		prev_lane_adjust = link_status[4];
> +	} while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
> +
> +	/* Failed to train CR, and disable pattern. */
> +	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
> +			   DP_TRAINING_PATTERN_DISABLE);
> +	mtk_dp_train_set_pattern(mtk_dp, 0);
> +
> +	return -ETIMEDOUT;
> +}
> +
> +static int mtk_dp_train_eq(struct mtk_dp *mtk_dp, u8
> target_lane_count)
> +{
> +	u8 lane_adjust[2] = {};
> +	u8 link_status[DP_LINK_STATUS_SIZE] = {};
> +	int train_retries = 0;
> +
> +	mtk_dp_pattern(mtk_dp, false);
> +
> +	do {
> +		train_retries++;
> +		if (!mtk_dp->train_info.cable_plugged_in) {
> +			mtk_dp_train_set_pattern(mtk_dp, 0);
> +			return -ENODEV;
> +		}
> +
> +		drm_dp_dpcd_read(&mtk_dp->aux,
> DP_ADJUST_REQUEST_LANE0_1,
> +				 lane_adjust, sizeof(lane_adjust));
> +		mtk_dp_train_update_swing_pre(mtk_dp,
> target_lane_count,
> +					      lane_adjust);
> +
> +		drm_dp_link_train_channel_eq_delay(&mtk_dp->aux,
> +						   mtk_dp->rx_cap);
> +
> +		/* check link status from sink device */
> +		drm_dp_dpcd_read_link_status(&mtk_dp->aux,
> link_status);
> +		if (drm_dp_channel_eq_ok(link_status,
> target_lane_count)) {
> +			dev_dbg(mtk_dp->dev, "Link train EQ pass\n");
> +
> +			/* Training done, and disable pattern. */
> +			drm_dp_dpcd_writeb(&mtk_dp->aux,
> DP_TRAINING_PATTERN_SET,
> +					   DP_TRAINING_PATTERN_DISABLE)
> ;
> +			mtk_dp_train_set_pattern(mtk_dp, 0);
> +			return 0;
> +		}
> +		dev_dbg(mtk_dp->dev, "Link train EQ fail\n");
> +	} while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
> +
> +	/* Failed to train EQ, and disable pattern. */
> +	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
> +			   DP_TRAINING_PATTERN_DISABLE);
> +	mtk_dp_train_set_pattern(mtk_dp, 0);
> +
> +	return -ETIMEDOUT;
> +}
> +
> +static int mtk_dp_parse_capabilities(struct mtk_dp *mtk_dp)
> +{
> +	u8 val;
> +	ssize_t ret;
> +
> +	drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap);
> +
> +	if (drm_dp_tps4_supported(mtk_dp->rx_cap))
> +		mtk_dp->train_info.channel_eq_pattern =
> DP_TRAINING_PATTERN_4;
> +	else if (drm_dp_tps3_supported(mtk_dp->rx_cap))
> +		mtk_dp->train_info.channel_eq_pattern =
> DP_TRAINING_PATTERN_3;
> +	else
> +		mtk_dp->train_info.channel_eq_pattern =
> DP_TRAINING_PATTERN_2;
> +
> +	mtk_dp->train_info.sink_ssc = drm_dp_max_downspread(mtk_dp-
> >rx_cap);
> +
> +	ret = drm_dp_dpcd_readb(&mtk_dp->aux, DP_MSTM_CAP, &val);
> +	if (ret < 1) {
> +		drm_err(mtk_dp->drm_dev, "Read mstm cap failed\n");
> +		return ret == 0 ? -EIO : ret;
> +	}
> +
> +	if (val & DP_MST_CAP) {
> +		/* Clear DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 */
> +		ret = drm_dp_dpcd_readb(&mtk_dp->aux,
> +					DP_DEVICE_SERVICE_IRQ_VECTOR_ES
> I0,
> +					&val);
> +		if (ret < 1) {
> +			drm_err(mtk_dp->drm_dev, "Read irq vector
> failed\n");
> +			return ret == 0 ? -EIO : ret;
> +		}
> +
> +		if (val)
> +			drm_dp_dpcd_writeb(&mtk_dp->aux,
> +					   DP_DEVICE_SERVICE_IRQ_VECTOR
> _ESI0,
> +					   val);
> +	}
> +
> +	return 0;
> +}
> +
> +static void mtk_dp_train_change_mode(struct mtk_dp *mtk_dp)
> +{
> +	phy_reset(mtk_dp->phy);
> +	mtk_dp_reset_swing_pre_emphasis(mtk_dp);
> +}
> +
> +static int mtk_dp_training(struct mtk_dp *mtk_dp)
> +{
> +	int ret;
> +	u8 lane_count, link_rate, train_limit, max_link_rate;
> +
> +	link_rate = min_t(u8, mtk_dp->max_linkrate,
> +			  mtk_dp->rx_cap[DP_MAX_LINK_RATE]);
> +	max_link_rate = link_rate;
> +	lane_count = min_t(u8, mtk_dp->max_lanes,
> +			   drm_dp_max_lane_count(mtk_dp->rx_cap));
> +
> +	/*
> +	 * TPS are generated by the hardware pattern generator. From
> the
> +	 * hardware setting we need to disable this scramble setting
> before
> +	 * use the TPS pattern generator.
> +	 */
> +	mtk_dp_training_set_scramble(mtk_dp, false);
> +
> +	for (train_limit = 6; train_limit > 0; train_limit--) {
> +		mtk_dp_train_change_mode(mtk_dp);
> +
> +		ret = mtk_dp_train_setting(mtk_dp, link_rate,
> lane_count);
> +		if (ret)
> +			return ret;
> +
> +		ret = mtk_dp_train_cr(mtk_dp, lane_count);
> +		if (ret == -ENODEV) {
> +			return ret;
> +		} else if (ret) {
> +			/* reduce link rate */
> +			switch (link_rate) {
> +			case DP_LINK_BW_1_62:
> +				lane_count = lane_count / 2;
> +				link_rate = max_link_rate;
> +				if (lane_count == 0)
> +					return -EIO;
> +				break;
> +			case DP_LINK_BW_2_7:
> +				link_rate = DP_LINK_BW_1_62;
> +				break;
> +			case DP_LINK_BW_5_4:
> +				link_rate = DP_LINK_BW_2_7;
> +				break;
> +			case DP_LINK_BW_8_1:
> +				link_rate = DP_LINK_BW_5_4;
> +				break;
> +			default:
> +				return -EINVAL;
> +			};
> +			continue;
> +		}
> +
> +		ret = mtk_dp_train_eq(mtk_dp, lane_count);
> +		if (ret == -ENODEV) {
> +			return ret;
> +		} else if (ret) {
> +			/* reduce lane count */
> +			if (lane_count == 0)
> +				return -EIO;
> +			lane_count /= 2;
> +			continue;
> +		}
> +
> +		/* if we can run to this, training is done. */
> +		break;
> +	}
> +
> +	if (train_limit == 0)
> +		return -ETIMEDOUT;
> +
> +	mtk_dp->train_info.link_rate = link_rate;
> +	mtk_dp->train_info.lane_count = lane_count;
> +
> +	/*
> +	 * After training done, we need to output normal stream instead
> of TPS,
> +	 * so we need to enable scramble.
> +	 */
> +	mtk_dp_training_set_scramble(mtk_dp, true);
> +	mtk_dp_set_enhanced_frame_mode(mtk_dp);
> +
> +	return 0;
> +}
> +
> +static void mtk_dp_video_enable(struct mtk_dp *mtk_dp, bool enable)
> +{
> +	/* the mute sequence is different between enable and disable */
> +	if (enable) {
> +		mtk_dp_msa_bypass_enable(mtk_dp, false);
> +		mtk_dp_pg_enable(mtk_dp, false);
> +		mtk_dp_set_tx_out(mtk_dp);
> +		mtk_dp_video_mute(mtk_dp, false);
> +	} else {
> +		mtk_dp_video_mute(mtk_dp, true);
> +		mtk_dp_pg_enable(mtk_dp, true);
> +		mtk_dp_msa_bypass_enable(mtk_dp, true);
> +	}
> +}
> +
> +static int mtk_dp_video_config(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_config_mn_mode(mtk_dp);
> +	mtk_dp_set_msa(mtk_dp);
> +	mtk_dp_set_color_depth(mtk_dp);
> +	return mtk_dp_set_color_format(mtk_dp, mtk_dp->info.format);
> +}
> +
> +static void mtk_dp_init_port(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_set_idle_pattern(mtk_dp, true);
> +	mtk_dp_initialize_priv_data(mtk_dp);
> +
> +	mtk_dp_initialize_settings(mtk_dp);
> +	mtk_dp_initialize_aux_settings(mtk_dp);
> +	mtk_dp_initialize_digital_settings(mtk_dp);
> +
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3690,
> +			   RX_REPLY_COMPLETE_MODE_AUX_TX_P0,
> +			   RX_REPLY_COMPLETE_MODE_AUX_TX_P0);
> +	mtk_dp_initialize_hpd_detect_settings(mtk_dp);
> +
> +	mtk_dp_digital_sw_reset(mtk_dp);
> +}
> +
> +static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
> +{
> +	struct mtk_dp *mtk_dp = dev;
> +	unsigned long flags;
> +	u32 status;
> +
> +	spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
> +	status = mtk_dp->irq_thread_handle;
> +	mtk_dp->irq_thread_handle = 0;
> +	spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
> +
> +	if (status & MTK_DP_THREAD_CABLE_STATE_CHG)
> +		drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
> +
> +	if (status & MTK_DP_THREAD_HPD_EVENT)
> +		dev_dbg(mtk_dp->dev, "Receive IRQ from sink
> devices\n");
> +
> +	return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t mtk_dp_hpd_event(int hpd, void *dev)
> +{
> +	struct mtk_dp *mtk_dp = dev;
> +	bool cable_sta_chg = false;
> +	unsigned long flags;
> +	u32 irq_status = mtk_dp_swirq_get_clear(mtk_dp) |
> +			 mtk_dp_hwirq_get_clear(mtk_dp);
> +
> +	if (!irq_status)
> +		return IRQ_HANDLED;
> +
> +	spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
> +
> +	if (irq_status & MTK_DP_HPD_INTERRUPT)
> +		mtk_dp->irq_thread_handle |= MTK_DP_THREAD_HPD_EVENT;
> +
> +	/* Cable state is changed. */
> +	if (irq_status != MTK_DP_HPD_INTERRUPT) {
> +		mtk_dp->irq_thread_handle |=
> MTK_DP_THREAD_CABLE_STATE_CHG;
> +		cable_sta_chg = true;
> +	}
> +
> +	spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
> +
> +	if (cable_sta_chg) {
> +		if (!!(mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3414) &
> +		       HPD_DB_DP_TRANS_P0_MASK))
> +			mtk_dp->train_info.cable_plugged_in = true;
> +		else
> +			mtk_dp->train_info.cable_plugged_in = false;
> +	}
> +
> +	return IRQ_WAKE_THREAD;
> +}
> +
> +static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp,
> +			   struct platform_device *pdev)
> +{
> +	struct device_node *endpoint;
> +	struct device *dev = &pdev->dev;
> +	int ret;
> +	void __iomem *base;
> +	u32 linkrate;
> +	int len;
> +
> +	base = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(base))
> +		return PTR_ERR(base);
> +
> +	mtk_dp->regs = devm_regmap_init_mmio(dev, base,
> &mtk_dp_regmap_config);
> +	if (IS_ERR(mtk_dp->regs))
> +		return PTR_ERR(mtk_dp->regs);
> +
> +	endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 1,
> -1);
> +	len = of_property_count_elems_of_size(endpoint,
> +					      "data-lanes",
> sizeof(u32));
> +	if (len < 0 || len > 4 || len == 3) {
> +		dev_err(dev, "invalid data lane size: %d\n", len);
> +		return -EINVAL;
> +	}
> +
> +	mtk_dp->max_lanes = len;
> +
> +	ret = device_property_read_u32(dev, "max-linkrate-mhz",
> &linkrate);
> +	if (ret) {
> +		dev_err(dev, "failed to read max linkrate: %d\n", ret);
> +		return ret;
> +	}
> +
> +	mtk_dp->max_linkrate = drm_dp_link_rate_to_bw_code(linkrate *
> 100);
> +
> +	return 0;
> +}
> +
> +static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
> +				    struct drm_connector *connector)
> +{
> +	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
> +	bool enabled = mtk_dp->enabled;
> +	struct edid *new_edid = NULL;
> +
> +	if (!enabled) {
> +		drm_bridge_chain_pre_enable(bridge);
> +
> +		/* power on aux */
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
> +				   DP_PWR_STATE_BANDGAP_TPLL_LANE,
> +				   DP_PWR_STATE_MASK);
> +
> +		/* power on panel */
> +		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER,
> DP_SET_POWER_D0);
> +		usleep_range(2000, 5000);
> +	}
> +
> +	new_edid = drm_get_edid(connector, &mtk_dp->aux.ddc);
> +
> +	/*
> +	 * Parse capability here to let atomic_get_input_bus_fmts and
> +	 * mode_valid use the capability to calculate sink bitrates.
> +	 */
> +	if (mtk_dp_parse_capabilities(mtk_dp)) {
> +		drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
> +		new_edid = NULL;
> +	}
> +
> +	if (!enabled) {
> +		/* power off panel */
> +		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER,
> DP_SET_POWER_D3);
> +		usleep_range(2000, 3000);
> +
> +		/* power off aux */
> +		mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
> +				   DP_PWR_STATE_BANDGAP_TPLL,
> +				   DP_PWR_STATE_MASK);
> +
> +		drm_bridge_chain_post_disable(bridge);
> +	}
> +
> +	return new_edid;
> +}
> +
> +static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux,
> +				   struct drm_dp_aux_msg *msg)
> +{
> +	struct mtk_dp *mtk_dp;
> +	bool is_read;
> +	u8 request;
> +	size_t accessed_bytes = 0;
> +	int ret;
> +
> +	mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
> +
> +	if (!mtk_dp->train_info.cable_plugged_in) {
> +		ret = -EAGAIN;
> +		goto err;
> +	}
> +
> +	switch (msg->request) {
> +	case DP_AUX_I2C_MOT:
> +	case DP_AUX_I2C_WRITE:
> +	case DP_AUX_NATIVE_WRITE:
> +	case DP_AUX_I2C_WRITE_STATUS_UPDATE:
> +	case DP_AUX_I2C_WRITE_STATUS_UPDATE | DP_AUX_I2C_MOT:
> +		request = msg->request &
> ~DP_AUX_I2C_WRITE_STATUS_UPDATE;
> +		is_read = false;
> +		break;
> +	case DP_AUX_I2C_READ:
> +	case DP_AUX_NATIVE_READ:
> +	case DP_AUX_I2C_READ | DP_AUX_I2C_MOT:
> +		request = msg->request;
> +		is_read = true;
> +		break;
> +	default:
> +		drm_err(mtk_aux->drm_dev, "invalid aux cmd = %d\n",
> +			msg->request);
> +		ret = -EINVAL;
> +		goto err;
> +	}
> +
> +	do {
> +		size_t to_access = min_t(size_t,
> DP_AUX_MAX_PAYLOAD_BYTES,
> +					 msg->size - accessed_bytes);
> +
> +		ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request,
> +					     msg->address +
> accessed_bytes,
> +					     msg->buffer +
> accessed_bytes,
> +					     to_access);
> +
> +		if (ret) {
> +			drm_info(mtk_dp->drm_dev,
> +				 "Failed to do AUX transfer: %d\n",
> ret);
> +			goto err;
> +		}
> +		accessed_bytes += to_access;
> +	} while (accessed_bytes < msg->size);
> +
> +	msg->reply = DP_AUX_NATIVE_REPLY_ACK | DP_AUX_I2C_REPLY_ACK;
> +	return msg->size;
> +err:
> +	msg->reply = DP_AUX_NATIVE_REPLY_NACK | DP_AUX_I2C_REPLY_NACK;
> +	return ret;
> +}
> +
> +static int mtk_dp_poweron(struct mtk_dp *mtk_dp)
> +{
> +	int ret;
> +
> +	ret = phy_init(mtk_dp->phy);
> +	if (ret) {
> +		dev_err(mtk_dp->dev, "Failed to initialize phy: %d\n",
> ret);
> +		return ret;
> +	}
> +
> +	mtk_dp_init_port(mtk_dp);
> +	mtk_dp_power_enable(mtk_dp);
> +
> +	return 0;
> +}
> +
> +static void mtk_dp_poweroff(struct mtk_dp *mtk_dp)
> +{
> +	mtk_dp_power_disable(mtk_dp);
> +	phy_exit(mtk_dp->phy);
> +}
> +
> +static int mtk_dp_bridge_attach(struct drm_bridge *bridge,
> +				enum drm_bridge_attach_flags flags)
> +{
> +	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
> +	int ret;
> +
> +	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
> +		dev_err(mtk_dp->dev, "Driver does not provide a
> connector!");
> +		return -EINVAL;
> +	}
> +
> +	mtk_dp->aux.drm_dev = bridge->dev;
> +	ret = drm_dp_aux_register(&mtk_dp->aux);
> +	if (ret) {
> +		dev_err(mtk_dp->dev,
> +			"failed to register DP AUX channel: %d\n",
> ret);
> +		return ret;
> +	}
> +
> +	ret = mtk_dp_poweron(mtk_dp);
> +	if (ret)
> +		goto err_aux_register;
> +
> +	if (mtk_dp->next_bridge) {
> +		ret = drm_bridge_attach(bridge->encoder, mtk_dp-
> >next_bridge,
> +					&mtk_dp->bridge, flags);
> +		if (ret) {
> +			drm_warn(mtk_dp->drm_dev,
> +				 "Failed to attach external bridge:
> %d\n", ret);
> +			goto err_bridge_attach;
> +		}
> +	}
> +
> +	mtk_dp->drm_dev = bridge->dev;
> +
> +	mtk_dp_hwirq_enable(mtk_dp, true);
> +
> +	return 0;
> +
> +err_bridge_attach:
> +	mtk_dp_poweroff(mtk_dp);
> +err_aux_register:
> +	drm_dp_aux_unregister(&mtk_dp->aux);
> +	return ret;
> +}
> +
> +static void mtk_dp_bridge_detach(struct drm_bridge *bridge)
> +{
> +	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
> +
> +	mtk_dp_hwirq_enable(mtk_dp, false);
> +	mtk_dp->drm_dev = NULL;
> +	mtk_dp_poweroff(mtk_dp);
> +	drm_dp_aux_unregister(&mtk_dp->aux);
> +}
> +
> +static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge,
> +					struct drm_bridge_state
> *old_state)
> +{
> +	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
> +	int ret;
> +
> +	mtk_dp->conn =
> drm_atomic_get_new_connector_for_encoder(old_state->base.state,
> +								bridge-
> >encoder);
> +	if (!mtk_dp->conn) {
> +		drm_err(mtk_dp->drm_dev,
> +			"Can't enable bridge as connector is
> missing\n");
> +		return;
> +	}
> +
> +	/* power on aux */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
> +			   DP_PWR_STATE_BANDGAP_TPLL_LANE,
> +			   DP_PWR_STATE_MASK);
> +
> +	if (mtk_dp->train_info.cable_plugged_in) {
> +		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER,
> DP_SET_POWER_D0);
> +		usleep_range(2000, 5000);
> +	}
> +
> +	/* Training */
> +	ret = mtk_dp_training(mtk_dp);
> +	if (ret) {
> +		drm_err(mtk_dp->drm_dev, "Training failed, %d\n", ret);
> +		goto power_off_aux;
> +	}
> +
> +	ret = mtk_dp_video_config(mtk_dp);
> +	if (ret)
> +		goto power_off_aux;
> +
> +	mtk_dp_video_enable(mtk_dp, true);
> +
> +	mtk_dp->enabled = true;
> +
> +	return;
> +power_off_aux:
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
> +			   DP_PWR_STATE_BANDGAP_TPLL,
> +			   DP_PWR_STATE_MASK);
> +}
> +
> +static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge,
> +					 struct drm_bridge_state
> *old_state)
> +{
> +	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
> +
> +	mtk_dp->enabled = false;
> +	mtk_dp_video_enable(mtk_dp, false);
> +
> +	if (mtk_dp->train_info.cable_plugged_in) {
> +		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER,
> DP_SET_POWER_D3);
> +		usleep_range(2000, 3000);
> +	}
> +
> +	/* power off aux */
> +	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
> +			   DP_PWR_STATE_BANDGAP_TPLL,
> +			   DP_PWR_STATE_MASK);
> +
> +	/* Ensure the sink is muted */
> +	msleep(20);
> +}
> +
> +static enum drm_mode_status
> +mtk_dp_bridge_mode_valid(struct drm_bridge *bridge,
> +			 const struct drm_display_info *info,
> +			 const struct drm_display_mode *mode)
> +{
> +	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
> +	u32 bpp = info->color_formats & DRM_COLOR_FORMAT_YCBCR422 ? 16
> : 24;
> +	u32 rate = min_t(u32, drm_dp_max_link_rate(mtk_dp->rx_cap) *
> +			      drm_dp_max_lane_count(mtk_dp->rx_cap),
> +			 drm_dp_bw_code_to_link_rate(mtk_dp-
> >max_linkrate) *
> +			 mtk_dp->max_lanes);
> +
> +	if (rate < mode->clock * bpp / 8)
> +		return MODE_CLOCK_HIGH;
> +
> +	return MODE_OK;
> +}
> +
> +static u32 *mtk_dp_bridge_atomic_get_output_bus_fmts(struct
> drm_bridge *bridge,
> +						     struct
> drm_bridge_state *bridge_state,
> +						     struct
> drm_crtc_state *crtc_state,
> +						     struct
> drm_connector_state *conn_state,
> +						     unsigned int
> *num_output_fmts)
> +{
> +	u32 *output_fmts;
> +
> +	*num_output_fmts = 0;
> +	output_fmts = kmalloc(sizeof(*output_fmts), GFP_KERNEL);
> +	if (!output_fmts)
> +		return NULL;
> +	*num_output_fmts = 1;
> +	output_fmts[0] = MEDIA_BUS_FMT_FIXED;
> +	return output_fmts;
> +}
> +
> +static const u32 mt8195_input_fmts[] = {
> +	MEDIA_BUS_FMT_RGB888_1X24,
> +	MEDIA_BUS_FMT_YUV8_1X24,
> +	MEDIA_BUS_FMT_YUYV8_1X16,
> +};
> +
> +static u32 *mtk_dp_bridge_atomic_get_input_bus_fmts(struct
> drm_bridge *bridge,
> +						    struct
> drm_bridge_state *bridge_state,
> +						    struct
> drm_crtc_state *crtc_state,
> +						    struct
> drm_connector_state *conn_state,
> +						    u32 output_fmt,
> +						    unsigned int
> *num_input_fmts)
> +{
> +	u32 *input_fmts;
> +	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
> +	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
> +	struct drm_display_info *display_info =
> +		&conn_state->connector->display_info;
> +	u32 rate = min_t(u32, drm_dp_max_link_rate(mtk_dp->rx_cap) *
> +			      drm_dp_max_lane_count(mtk_dp->rx_cap),
> +			 drm_dp_bw_code_to_link_rate(mtk_dp-
> >max_linkrate) *
> +			 mtk_dp->max_lanes);
> +
> +	*num_input_fmts = 0;
> +
> +	/*
> +	 * If the linkrate is smaller than datarate of RGB888, larger
> than
> +	 * datarate of YUV422 and sink device supports YUV422, we
> output YUV422
> +	 * format. Use this condition, we can support more resolution.
> +	 */
> +	if ((rate < (mode->clock * 24 / 8)) &&
> +	    (rate > (mode->clock * 16 / 8)) &&
> +	    (display_info->color_formats & DRM_COLOR_FORMAT_YCBCR422))
> {
> +		input_fmts = kcalloc(1, sizeof(*input_fmts),
> GFP_KERNEL);
> +		if (!input_fmts)
> +			return NULL;
> +		*num_input_fmts = 1;
> +		input_fmts[0] = MEDIA_BUS_FMT_YUYV8_1X16;
> +	} else {
> +		input_fmts = kcalloc(ARRAY_SIZE(mt8195_input_fmts),
> +				     sizeof(*input_fmts),
> +				     GFP_KERNEL);
> +		if (!input_fmts)
> +			return NULL;
> +
> +		*num_input_fmts = ARRAY_SIZE(mt8195_input_fmts);
> +		memcpy(input_fmts, mt8195_input_fmts,
> sizeof(mt8195_input_fmts));
> +	}
> +
> +	return input_fmts;
> +}
> +
> +static int mtk_dp_bridge_atomic_check(struct drm_bridge *bridge,
> +				      struct drm_bridge_state
> *bridge_state,
> +				      struct drm_crtc_state
> *crtc_state,
> +				      struct drm_connector_state
> *conn_state)
> +{
> +	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
> +	struct drm_crtc *crtc = conn_state->crtc;
> +	unsigned int input_bus_format;
> +
> +	input_bus_format = bridge_state->input_bus_cfg.format;
> +
> +	dev_dbg(mtk_dp->dev, "input format 0x%04x, output format
> 0x%04x\n",
> +		bridge_state->input_bus_cfg.format,
> +		 bridge_state->output_bus_cfg.format);
> +
> +	if (input_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
> +		mtk_dp->info.format = DP_PIXELFORMAT_YUV422;
> +	else
> +		mtk_dp->info.format = DP_PIXELFORMAT_RGB;
> +
> +	if (!crtc) {
> +		drm_err(mtk_dp->drm_dev,
> +			"Can't enable bridge as connector state doesn't
> have a crtc\n");
> +		return -EINVAL;
> +	}
> +
> +	drm_display_mode_to_videomode(&crtc_state->adjusted_mode,
> &mtk_dp->info.vm);
> +
> +	return 0;
> +}
> +
> +static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
> +	.atomic_check = mtk_dp_bridge_atomic_check,
> +	.atomic_duplicate_state =
> drm_atomic_helper_bridge_duplicate_state,
> +	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> +	.atomic_get_output_bus_fmts =
> mtk_dp_bridge_atomic_get_output_bus_fmts,
> +	.atomic_get_input_bus_fmts =
> mtk_dp_bridge_atomic_get_input_bus_fmts,
> +	.atomic_reset = drm_atomic_helper_bridge_reset,
> +	.attach = mtk_dp_bridge_attach,
> +	.detach = mtk_dp_bridge_detach,
> +	.atomic_enable = mtk_dp_bridge_atomic_enable,
> +	.atomic_disable = mtk_dp_bridge_atomic_disable,
> +	.mode_valid = mtk_dp_bridge_mode_valid,
> +	.get_edid = mtk_dp_get_edid,
> +};
> +
> +static int mtk_dp_probe(struct platform_device *pdev)
> +{
> +	struct mtk_dp *mtk_dp;
> +	struct device *dev = &pdev->dev;
> +	int ret, irq_num;
> +
> +	mtk_dp = devm_kzalloc(dev, sizeof(*mtk_dp), GFP_KERNEL);
> +	if (!mtk_dp)
> +		return -ENOMEM;
> +
> +	mtk_dp->dev = dev;
> +
> +	irq_num = platform_get_irq(pdev, 0);
> +	if (irq_num < 0)
> +		return dev_err_probe(dev, irq_num,
> +				     "failed to request dp irq
> resource\n");
> +
> +	mtk_dp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 
> 1, 0);
> +	if (IS_ERR(mtk_dp->next_bridge))
> +		return dev_err_probe(dev, PTR_ERR(mtk_dp->next_bridge),
> +				     "Failed to get bridge\n");
> +
> +	ret = mtk_dp_dt_parse(mtk_dp, pdev);
> +	if (ret)
> +		return dev_err_probe(dev, ret, "Failed to parse dt\n");
> +
> +	drm_dp_aux_init(&mtk_dp->aux);
> +	mtk_dp->aux.name = "aux_mtk_dp";
> +	mtk_dp->aux.transfer = mtk_dp_aux_transfer;
> +
> +	spin_lock_init(&mtk_dp->irq_thread_lock);
> +
> +	ret = devm_request_threaded_irq(dev, irq_num, mtk_dp_hpd_event,
> +					mtk_dp_hpd_event_thread,
> +					IRQ_TYPE_LEVEL_HIGH,
> dev_name(dev),
> +					mtk_dp);
> +	if (ret)
> +		return dev_err_probe(dev, ret,
> +				     "failed to request mediatek dptx
> irq\n");
> +
> +	platform_set_drvdata(pdev, mtk_dp);
> +
> +	mtk_dp->phy_dev = platform_device_register_data(dev, "mediatek-
> dp-phy",
> +							PLATFORM_DEVID_
> AUTO,
> +							&mtk_dp->regs,
> +							sizeof(struct
> regmap *));
> +	if (IS_ERR(mtk_dp->phy_dev))
> +		return dev_err_probe(dev, PTR_ERR(mtk_dp->phy_dev),
> +				     "Failed to create device mediatek-
> dp-phy\n");
> +
> +	mtk_dp_get_calibration_data(mtk_dp);
> +
> +	mtk_dp->phy = devm_phy_get(&mtk_dp->phy_dev->dev, "dp");
> +
> +	if (IS_ERR(mtk_dp->phy)) {
> +		platform_device_unregister(mtk_dp->phy_dev);
> +		return dev_err_probe(dev, PTR_ERR(mtk_dp->phy),
> +				     "Failed to get phy\n");
> +	}
> +
> +	mtk_dp->bridge.funcs = &mtk_dp_bridge_funcs;
> +	mtk_dp->bridge.of_node = dev->of_node;
> +
> +	mtk_dp->bridge.ops =
> +		DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
> DRM_BRIDGE_OP_HPD;
> +	mtk_dp->bridge.type = DRM_MODE_CONNECTOR_eDP;
> +
> +	drm_bridge_add(&mtk_dp->bridge);
> +
> +	pm_runtime_enable(dev);
> +	pm_runtime_get_sync(dev);
> +
> +	return 0;
> +}
> +
> +static int mtk_dp_remove(struct platform_device *pdev)
> +{
> +	struct mtk_dp *mtk_dp = platform_get_drvdata(pdev);
> +
> +	pm_runtime_put(&pdev->dev);
> +	pm_runtime_disable(&pdev->dev);
> +	drm_bridge_remove(&mtk_dp->bridge);
> +	platform_device_unregister(mtk_dp->phy_dev);
> +
> +	return 0;
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int mtk_dp_suspend(struct device *dev)
> +{
> +	struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
> +
> +	mtk_dp_power_disable(mtk_dp);
> +	mtk_dp_hwirq_enable(mtk_dp, false);
> +	pm_runtime_put_sync(dev);
> +
> +	return 0;
> +}
> +
> +static int mtk_dp_resume(struct device *dev)
> +{
> +	struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
> +
> +	pm_runtime_get_sync(dev);
> +	mtk_dp_init_port(mtk_dp);
> +	mtk_dp_hwirq_enable(mtk_dp, true);
> +	mtk_dp_power_enable(mtk_dp);
> +
> +	return 0;
> +}
> +#endif
> +
> +static SIMPLE_DEV_PM_OPS(mtk_dp_pm_ops, mtk_dp_suspend,
> mtk_dp_resume);
> +
> +static const struct of_device_id mtk_dp_of_match[] = {
> +	{ .compatible = "mediatek,mt8195-edp-tx" },
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, mtk_dp_of_match);
> +
> +struct platform_driver mtk_dp_driver = {
> +	.probe = mtk_dp_probe,
> +	.remove = mtk_dp_remove,
> +	.driver = {
> +		.name = "mediatek-drm-dp",
> +		.of_match_table = mtk_dp_of_match,
> +		.pm = &mtk_dp_pm_ops,
> +	},
> +};
> +
> +module_platform_driver(mtk_dp_driver);
> +
> +MODULE_AUTHOR("Jitao Shi <[e-mail]>");
> +MODULE_AUTHOR("Markus Schneider-Pargmann <[e-mail]>");
> +MODULE_AUTHOR("Bo-Chen Chen <[e-mail]>");
> +MODULE_DESCRIPTION("MediaTek DisplayPort Driver");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/gpu/drm/mediatek/mtk_dp_reg.h
> b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
> new file mode 100644
> index 000000000000..3f01ba44871f
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
> @@ -0,0 +1,305 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2019-2022 MediaTek Inc.
> + * Copyright (c) 2022 BayLibre
> + */
> +#ifndef _MTK_DP_REG_H_
> +#define _MTK_DP_REG_H_
> +
> +#define SEC_OFFSET	0x4000
> +
> +#define MTK_DP_HPD_DISCONNECT		BIT(1)
> +#define MTK_DP_HPD_CONNECT		BIT(2)
> +#define MTK_DP_HPD_INTERRUPT		BIT(3)
> +
> +/* offset: 0x0 */
> +#define DP_PHY_GLB_BIAS_GEN_00		0x0
> +#define RG_XTP_GLB_BIAS_INTR_CTRL		GENMASK(20, 16)
> +#define DP_PHY_GLB_DPAUX_TX		0x8
> +#define RG_CKM_PT0_CKTX_IMPSEL			GENMASK(23, 20)
> +#define MTK_DP_0034			0x34
> +#define DA_XTP_GLB_CKDET_EN_FORCE_VAL		BIT(15)
> +#define DA_XTP_GLB_CKDET_EN_FORCE_EN		BIT(14)
> +#define DA_CKM_INTCKTX_EN_FORCE_VAL		BIT(13)
> +#define DA_CKM_INTCKTX_EN_FORCE_EN		BIT(12)
> +#define DA_CKM_CKTX0_EN_FORCE_VAL		BIT(11)
> +#define DA_CKM_CKTX0_EN_FORCE_EN		BIT(10)
> +#define DA_CKM_XTAL_CK_FORCE_VAL		BIT(9)
> +#define DA_CKM_XTAL_CK_FORCE_EN			BIT(8)
> +#define DA_CKM_BIAS_LPF_EN_FORCE_VAL		BIT(7)
> +#define DA_CKM_BIAS_LPF_EN_FORCE_EN		BIT(6)
> +#define DA_CKM_BIAS_EN_FORCE_VAL		BIT(5)
> +#define DA_CKM_BIAS_EN_FORCE_EN			BIT(4)
> +#define DA_XTP_GLB_AVD10_ON_FORCE_VAL		BIT(3)
> +#define DA_XTP_GLB_AVD10_ON_FORCE		BIT(2)
> +#define DA_XTP_GLB_LDO_EN_FORCE_VAL		BIT(1)
> +#define DA_XTP_GLB_LDO_EN_FORCE_EN		BIT(0)
> +#define DP_PHY_LANE_TX_0		0x104
> +#define RG_XTP_LN0_TX_IMPSEL_PMOS		GENMASK(15, 12)
> +#define RG_XTP_LN0_TX_IMPSEL_NMOS		GENMASK(19, 16)
> +#define DP_PHY_LANE_TX_1		0x204
> +#define RG_XTP_LN1_TX_IMPSEL_PMOS		GENMASK(15, 12)
> +#define RG_XTP_LN1_TX_IMPSEL_NMOS		GENMASK(19, 16)
> +#define DP_PHY_LANE_TX_2		0x304
> +#define RG_XTP_LN2_TX_IMPSEL_PMOS		GENMASK(15, 12)
> +#define RG_XTP_LN2_TX_IMPSEL_NMOS		GENMASK(19, 16)
> +#define DP_PHY_LANE_TX_3		0x404
> +#define RG_XTP_LN3_TX_IMPSEL_PMOS		GENMASK(15, 12)
> +#define RG_XTP_LN3_TX_IMPSEL_NMOS		GENMASK(19, 16)
> +#define MTK_DP_1040			0x1040
> +#define RG_DPAUX_RX_VALID_DEGLITCH_EN		BIT(2)
> +#define RG_XTP_GLB_CKDET_EN			BIT(1)
> +#define RG_DPAUX_RX_EN				BIT(0)
> +
> +/* offset: TOP_OFFSET (0x2000) */
> +#define MTK_DP_TOP_PWR_STATE		0x2000
> +#define DP_PWR_STATE_MASK			GENMASK(1, 0)
> +#define DP_PWR_STATE_BANDGAP			BIT(0)
> +#define DP_PWR_STATE_BANDGAP_TPLL		BIT(1)
> +#define DP_PWR_STATE_BANDGAP_TPLL_LANE		GENMASK(1, 0)
> +#define MTK_DP_TOP_SWING_EMP		0x2004
> +#define DP_TX0_VOLT_SWING_MASK			GENMASK(1, 0)
> +#define DP_TX0_VOLT_SWING_SHIFT			0
> +#define DP_TX0_PRE_EMPH_MASK			GENMASK(3, 2)
> +#define DP_TX0_PRE_EMPH_SHIFT			2
> +#define DP_TX1_VOLT_SWING_MASK			GENMASK(9, 8)
> +#define DP_TX1_VOLT_SWING_SHIFT			8
> +#define DP_TX1_PRE_EMPH_MASK			GENMASK(11, 10)
> +#define DP_TX2_VOLT_SWING_MASK			GENMASK(17, 16)
> +#define DP_TX2_PRE_EMPH_MASK			GENMASK(19, 18)
> +#define DP_TX3_VOLT_SWING_MASK			GENMASK(25, 24)
> +#define DP_TX3_PRE_EMPH_MASK			GENMASK(27, 26)
> +#define MTK_DP_TOP_RESET_AND_PROBE	0x2020
> +#define SW_RST_B_PHYD				BIT(4)
> +#define MTK_DP_TOP_IRQ_MASK		0x202c
> +#define IRQ_MASK_AUX_TOP_IRQ			BIT(2)
> +#define MTK_DP_TOP_MEM_PD		0x2038
> +#define MEM_ISO_EN				BIT(0)
> +#define FUSE_SEL				BIT(2)
> +
> +/* offset: ENC0_OFFSET (0x3000) */
> +#define MTK_DP_ENC0_P0_3000			0x3000
> +#define LANE_NUM_DP_ENC0_P0_MASK			GENMASK(1, 0)
> +#define VIDEO_MUTE_SW_DP_ENC0_P0			BIT(2)
> +#define VIDEO_MUTE_SEL_DP_ENC0_P0			BIT(3)
> +#define ENHANCED_FRAME_EN_DP_ENC0_P0			BIT(4)
> +#define MTK_DP_ENC0_P0_3004			0x3004
> +#define VIDEO_M_CODE_SEL_DP_ENC0_P0_MASK		BIT(8)
> +#define DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0		BIT(9)
> +#define MTK_DP_ENC0_P0_3010			0x3010
> +#define HTOTAL_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
> +#define MTK_DP_ENC0_P0_3014			0x3014
> +#define VTOTAL_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
> +#define MTK_DP_ENC0_P0_3018			0x3018
> +#define HSTART_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
> +#define MTK_DP_ENC0_P0_301C			0x301c
> +#define VSTART_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
> +#define MTK_DP_ENC0_P0_3020			0x3020
> +#define HWIDTH_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
> +#define MTK_DP_ENC0_P0_3024			0x3024
> +#define VHEIGHT_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
> +#define MTK_DP_ENC0_P0_3028			0x3028
> +#define HSW_SW_DP_ENC0_P0_MASK				GENMASK
> (14, 0)
> +#define HSP_SW_DP_ENC0_P0_MASK				BIT(15)
> +#define MTK_DP_ENC0_P0_302C			0x302c
> +#define VSW_SW_DP_ENC0_P0_MASK				GENMASK
> (14, 0)
> +#define VSP_SW_DP_ENC0_P0_MASK				BIT(15)
> +#define MTK_DP_ENC0_P0_3030			0x3030
> +#define HTOTAL_SEL_DP_ENC0_P0				BIT(0)
> +#define VTOTAL_SEL_DP_ENC0_P0				BIT(1)
> +#define HSTART_SEL_DP_ENC0_P0				BIT(2)
> +#define VSTART_SEL_DP_ENC0_P0				BIT(3)
> +#define HWIDTH_SEL_DP_ENC0_P0				BIT(4)
> +#define VHEIGHT_SEL_DP_ENC0_P0				BIT(5)
> +#define HSP_SEL_DP_ENC0_P0				BIT(6)
> +#define HSW_SEL_DP_ENC0_P0				BIT(7)
> +#define VSP_SEL_DP_ENC0_P0				BIT(8)
> +#define VSW_SEL_DP_ENC0_P0				BIT(9)
> +#define MTK_DP_ENC0_P0_3034			0x3034
> +#define MTK_DP_ENC0_P0_3038			0x3038
> +#define VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK		BIT(11)
> +#define MTK_DP_ENC0_P0_303C			0x303c
> +#define SRAM_START_READ_THRD_DP_ENC0_P0_MASK		GENMASK(5, 0)
> +#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_MASK		GENMASK(10, 8)
> +#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_16BIT		(0 << 8)
> +#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_12BIT		(1 << 8)
> +#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_10BIT		(2 << 8)
> +#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_8BIT		(3 << 8)
> +#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_6BIT		(4 << 8)
> +#define PIXEL_ENCODE_FORMAT_DP_ENC0_P0_MASK		GENMASK(14, 12)
> +#define PIXEL_ENCODE_FORMAT_DP_ENC0_P0_RGB		(0 << 12)
> +#define PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR422		(1 <<
> 12)
> +#define PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR420		(2 <<
> 12)
> +#define VIDEO_MN_GEN_EN_DP_ENC0_P0			BIT(15)
> +#define MTK_DP_ENC0_P0_3040			0x3040
> +#define SDP_DOWN_CNT_DP_ENC0_P0_VAL			0x20
> +#define SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK		GENMASK(11, 0)
> +#define MTK_DP_ENC0_P0_304C			0x304c
> +#define VBID_VIDEO_MUTE_DP_ENC0_P0_MASK			BIT(2)
> +#define SDP_VSYNC_RISING_MASK_DP_ENC0_P0_MASK		BIT(8)
> +#define MTK_DP_ENC0_P0_3064			0x3064
> +#define HDE_NUM_LAST_DP_ENC0_P0_MASK			GENMASK(15, 0)
> +#define MTK_DP_ENC0_P0_3154			0x3154
> +#define PGEN_HTOTAL_DP_ENC0_P0_MASK			GENMASK(13, 0)
> +#define MTK_DP_ENC0_P0_3158			0x3158
> +#define PGEN_HSYNC_RISING_DP_ENC0_P0_MASK		GENMASK(13, 0)
> +#define MTK_DP_ENC0_P0_315C			0x315c
> +#define PGEN_HSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK		GENMASK
> (13, 0)
> +#define MTK_DP_ENC0_P0_3160			0x3160
> +#define PGEN_HFDE_START_DP_ENC0_P0_MASK			GENMASK
> (13, 0)
> +#define MTK_DP_ENC0_P0_3164			0x3164
> +#define PGEN_HFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK		GENMASK
> (13, 0)
> +#define MTK_DP_ENC0_P0_3168			0x3168
> +#define PGEN_VTOTAL_DP_ENC0_P0_MASK			GENMASK(12, 0)
> +#define MTK_DP_ENC0_P0_316C			0x316c
> +#define PGEN_VSYNC_RISING_DP_ENC0_P0_MASK		GENMASK(12, 0)
> +#define MTK_DP_ENC0_P0_3170			0x3170
> +#define PGEN_VSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK		GENMASK
> (12, 0)
> +#define MTK_DP_ENC0_P0_3174			0x3174
> +#define PGEN_VFDE_START_DP_ENC0_P0_MASK			GENMASK
> (12, 0)
> +#define MTK_DP_ENC0_P0_3178			0x3178
> +#define PGEN_VFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK		GENMASK
> (12, 0)
> +#define MTK_DP_ENC0_P0_31B0			0x31b0
> +#define PGEN_PATTERN_SEL_VAL				4
> +#define PGEN_PATTERN_SEL_MASK				GENMASK
> (6, 4)
> +#define MTK_DP_ENC0_P0_31EC			0x31ec
> +#define AUDIO_CH_SRC_SEL_DP_ENC0_P0			BIT(4)
> +#define ISRC1_HB3_DP_ENC0_P0_MASK			GENMASK(15, 8)
> +
> +/* offset: ENC1_OFFSET (0x3200) */
> +#define MTK_DP_ENC1_P0_3300			0x3300
> +#define VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_VAL		2
> +#define VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_MASK		GENMASK(9, 8)
> +#define MTK_DP_ENC1_P0_3364			0x3364
> +#define SDP_DOWN_CNT_IN_HBLANK_DP_ENC1_P0_VAL		0x20
> +#define SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK	GENMASK(11, 0)
> +#define FIFO_READ_START_POINT_DP_ENC1_P0_VAL		4
> +#define FIFO_READ_START_POINT_DP_ENC1_P0_MASK		GENMASK
> (15, 12)
> +#define MTK_DP_ENC1_P0_3368			0x3368
> +#define VIDEO_SRAM_FIFO_CNT_RESET_SEL_DP_ENC1_P0	BIT(0)
> +#define VIDEO_STABLE_CNT_THRD_DP_ENC1_P0		BIT(4)
> +#define SDP_DP13_EN_DP_ENC1_P0				BIT(8)
> +#define BS2BS_MODE_DP_ENC1_P0				BIT(12)
> +#define BS2BS_MODE_DP_ENC1_P0_MASK			GENMASK(13, 12)
> +#define BS2BS_MODE_DP_ENC1_P0_VAL			1
> +#define DP_ENC1_P0_3368_VAL				(VIDEO_SRAM_FIF
> O_CNT_RESET_SEL_DP_ENC1_P0 | \
> +							 VIDEO_STABLE_C
> NT_THRD_DP_ENC1_P0 | \
> +							 SDP_DP13_EN_DP
> _ENC1_P0 | \
> +							 BS2BS_MODE_DP_
> ENC1_P0)
> +
> +/* offset: TRANS_OFFSET (0x3400) */
> +#define MTK_DP_TRANS_P0_3400				0x3400
> +#define PATTERN1_EN_DP_TRANS_P0_MASK				BIT(12)
> +#define PATTERN2_EN_DP_TRANS_P0_MASK				BIT(13)
> +#define PATTERN3_EN_DP_TRANS_P0_MASK				BIT(14)
> +#define PATTERN4_EN_DP_TRANS_P0_MASK				BIT(15)
> +#define MTK_DP_TRANS_P0_3404				0x3404
> +#define DP_SCR_EN_DP_TRANS_P0_MASK				BIT(0)
> +#define MTK_DP_TRANS_P0_340C				0x340c
> +#define DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0		BIT(13)
> +#define MTK_DP_TRANS_P0_3410				0x3410
> +#define HPD_DEB_THD_DP_TRANS_P0_MASK				GENMASK
> (3, 0)
> +#define HPD_INT_THD_DP_TRANS_P0_MASK				GENMASK
> (7, 4)
> +#define HPD_INT_THD_DP_TRANS_P0_LOWER_500US			(2 <<
> 4)
> +#define HPD_INT_THD_DP_TRANS_P0_UPPER_1100US			(2 <<
> 6)
> +#define HPD_DISC_THD_DP_TRANS_P0_MASK				
> GENMASK(11, 8)
> +#define HPD_CONN_THD_DP_TRANS_P0_MASK				
> GENMASK(15, 12)
> +#define MTK_DP_TRANS_P0_3414				0x3414
> +#define HPD_DB_DP_TRANS_P0_MASK					
> BIT(2)
> +#define MTK_DP_TRANS_P0_3418				0x3418
> +#define IRQ_CLR_DP_TRANS_P0_MASK				GENMASK
> (3, 0)
> +#define IRQ_MASK_DP_TRANS_P0_MASK				GENMASK
> (7, 4)
> +#define IRQ_MASK_DP_TRANS_P0_DISC_IRQ				
> (BIT(1) << 4)
> +#define IRQ_MASK_DP_TRANS_P0_CONN_IRQ				
> (BIT(2) << 4)
> +#define IRQ_MASK_DP_TRANS_P0_INT_IRQ				(BIT(3)
> << 4)
> +#define IRQ_STATUS_DP_TRANS_P0_MASK				GENMASK
> (15, 12)
> +#define MTK_DP_TRANS_P0_342C				0x342c
> +#define XTAL_FREQ_DP_TRANS_P0_DEFAULT				
> (BIT(0) | BIT(3) | BIT(5) | BIT(6))
> +#define XTAL_FREQ_DP_TRANS_P0_MASK				GENMASK
> (7, 0)
> +#define MTK_DP_TRANS_P0_3430				0x3430
> +#define HPD_INT_THD_ECO_DP_TRANS_P0_MASK			GENMASK
> (1, 0)
> +#define HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT		BIT(1)
> +#define MTK_DP_TRANS_P0_34A4				0x34a4
> +#define LANE_NUM_DP_TRANS_P0_MASK				GENMASK
> (3, 2)
> +#define MTK_DP_TRANS_P0_3540				0x3540
> +#define FEC_EN_DP_TRANS_P0_MASK					
> BIT(0)
> +#define FEC_CLOCK_EN_MODE_DP_TRANS_P0				
> BIT(3)
> +#define MTK_DP_TRANS_P0_3580				0x3580
> +#define POST_MISC_DATA_LANE0_OV_DP_TRANS_P0_MASK		BIT(8)
> +#define POST_MISC_DATA_LANE1_OV_DP_TRANS_P0_MASK		BIT(9)
> +#define POST_MISC_DATA_LANE2_OV_DP_TRANS_P0_MASK		BIT(10)
> +#define POST_MISC_DATA_LANE3_OV_DP_TRANS_P0_MASK		BIT(11)
> +#define MTK_DP_TRANS_P0_35C8				0x35c8
> +#define SW_IRQ_CLR_DP_TRANS_P0_MASK				GENMASK
> (15, 0)
> +#define SW_IRQ_STATUS_DP_TRANS_P0_MASK				
> GENMASK(15, 0)
> +#define MTK_DP_TRANS_P0_35D0				0x35d0
> +#define SW_IRQ_FINAL_STATUS_DP_TRANS_P0_MASK			GENMASK
> (15, 0)
> +#define MTK_DP_TRANS_P0_35F0				0x35f0
> +#define DP_TRANS_DUMMY_RW_0					BIT(3)
> +#define DP_TRANS_DUMMY_RW_0_MASK				GENMASK
> (3, 2)
> +
> +/* offset: AUX_OFFSET (0x3600) */
> +#define MTK_DP_AUX_P0_360C			0x360c
> +#define AUX_TIMEOUT_THR_AUX_TX_P0_MASK			GENMASK
> (12, 0)
> +#define AUX_TIMEOUT_THR_AUX_TX_P0_VAL			0x1595
> +#define MTK_DP_AUX_P0_3614			0x3614
> +#define AUX_RX_UI_CNT_THR_AUX_TX_P0_MASK		GENMASK(6, 0)
> +#define AUX_RX_UI_CNT_THR_AUX_FOR_26M			13
> +#define MTK_DP_AUX_P0_3618			0x3618
> +#define AUX_RX_FIFO_FULL_AUX_TX_P0_MASK			BIT(9)
> +#define AUX_RX_FIFO_WRITE_POINTER_AUX_TX_P0_MASK	GENMASK(3, 0)
> +#define MTK_DP_AUX_P0_3620			0x3620
> +#define AUX_RD_MODE_AUX_TX_P0_MASK			BIT(9)
> +#define AUX_RX_FIFO_READ_PULSE_TX_P0			BIT(8)
> +#define AUX_RX_FIFO_READ_DATA_AUX_TX_P0_MASK		GENMASK(7, 0)
> +#define MTK_DP_AUX_P0_3624			0x3624
> +#define AUX_RX_REPLY_COMMAND_AUX_TX_P0_MASK		GENMASK(3, 0)
> +#define MTK_DP_AUX_P0_3628			0x3628
> +#define AUX_RX_PHY_STATE_AUX_TX_P0_MASK			GENMASK
> (9, 0)
> +#define AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE		BIT(0)
> +#define MTK_DP_AUX_P0_362C			0x362c
> +#define AUX_NO_LENGTH_AUX_TX_P0				BIT(0)
> +#define AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK		BIT(1)
> +#define AUX_RESERVED_RW_0_AUX_TX_P0_MASK		GENMASK(15, 2)
> +#define MTK_DP_AUX_P0_3630			0x3630
> +#define AUX_TX_REQUEST_READY_AUX_TX_P0			BIT(3)
> +#define MTK_DP_AUX_P0_3634			0x3634
> +#define AUX_TX_OVER_SAMPLE_RATE_AUX_TX_P0_MASK		GENMASK
> (15, 8)
> +#define AUX_TX_OVER_SAMPLE_RATE_FOR_26M			25
> +#define MTK_DP_AUX_P0_3640			0x3640
> +#define AUX_RX_AUX_RECV_COMPLETE_IRQ_AUX_TX_P0		BIT(6)
> +#define AUX_RX_EDID_RECV_COMPLETE_IRQ_AUX_TX_P0		BIT(5)
> +#define AUX_RX_MCCS_RECV_COMPLETE_IRQ_AUX_TX_P0		BIT(4)
> +#define AUX_RX_CMD_RECV_IRQ_AUX_TX_P0			BIT(3)
> +#define AUX_RX_ADDR_RECV_IRQ_AUX_TX_P0			BIT(2)
> +#define AUX_RX_DATA_RECV_IRQ_AUX_TX_P0			BIT(1)
> +#define AUX_400US_TIMEOUT_IRQ_AUX_TX_P0			BIT(0)
> +#define DP_AUX_P0_3640_VAL				(AUX_400US_TIME
> OUT_IRQ_AUX_TX_P0 | \
> +							 AUX_RX_DATA_RE
> CV_IRQ_AUX_TX_P0 | \
> +							 AUX_RX_ADDR_RE
> CV_IRQ_AUX_TX_P0 | \
> +							 AUX_RX_CMD_REC
> V_IRQ_AUX_TX_P0 | \
> +							 AUX_RX_MCCS_RE
> CV_COMPLETE_IRQ_AUX_TX_P0 | \
> +							 AUX_RX_EDID_RE
> CV_COMPLETE_IRQ_AUX_TX_P0 | \
> +							 AUX_RX_AUX_REC
> V_COMPLETE_IRQ_AUX_TX_P0)
> +#define MTK_DP_AUX_P0_3644			0x3644
> +#define MCU_REQUEST_COMMAND_AUX_TX_P0_MASK		GENMASK(3, 0)
> +#define MTK_DP_AUX_P0_3648			0x3648
> +#define MCU_REQUEST_ADDRESS_LSB_AUX_TX_P0_MASK		GENMASK
> (15, 0)
> +#define MTK_DP_AUX_P0_364C			0x364c
> +#define MCU_REQUEST_ADDRESS_MSB_AUX_TX_P0_MASK		GENMASK
> (3, 0)
> +#define MTK_DP_AUX_P0_3650			0x3650
> +#define MCU_REQ_DATA_NUM_AUX_TX_P0_MASK			GENMASK
> (15, 12)
> +#define PHY_FIFO_RST_AUX_TX_P0_MASK			BIT(9)
> +#define MCU_ACK_TRAN_COMPLETE_AUX_TX_P0			BIT(8)
> +#define MTK_DP_AUX_P0_3658			0x3658
> +#define AUX_TX_OV_EN_AUX_TX_P0_MASK			BIT(0)
> +#define MTK_DP_AUX_P0_3690			0x3690
> +#define RX_REPLY_COMPLETE_MODE_AUX_TX_P0		BIT(8)
> +#define MTK_DP_AUX_P0_3704			0x3704
> +#define AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK	BIT(1)
> +#define AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0		BIT(2)
> +#define MTK_DP_AUX_P0_3708			0x3708
> +#define MTK_DP_AUX_P0_37C8			0x37c8
> +#define MTK_ATOP_EN_AUX_TX_P0				BIT(0)
> +
> +#endif /*_MTK_DP_REG_H_*/

Patch

diff --git a/drivers/gpu/drm/mediatek/Kconfig b/drivers/gpu/drm/mediatek/Kconfig
index 2976d21e9a34..e66f4a3b6be0 100644
--- a/drivers/gpu/drm/mediatek/Kconfig
+++ b/drivers/gpu/drm/mediatek/Kconfig
@@ -21,6 +21,15 @@  config DRM_MEDIATEK
 	  This driver provides kernel mode setting and
 	  buffer management to userspace.
 
+config DRM_MEDIATEK_DP
+	tristate "DRM DPTX Support for MediaTek SoCs"
+	depends on DRM_MEDIATEK
+	select PHY_MTK_DP
+	select DRM_DISPLAY_HELPER
+	select DRM_DISPLAY_DP_HELPER
+	help
+	  DRM/KMS Display Port driver for MediaTek SoCs.
+
 config DRM_MEDIATEK_HDMI
 	tristate "DRM HDMI Support for Mediatek SoCs"
 	depends on DRM_MEDIATEK
diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
index 6e604a933ed0..3517d1c65cd7 100644
--- a/drivers/gpu/drm/mediatek/Makefile
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -23,3 +23,5 @@  mediatek-drm-hdmi-objs := mtk_cec.o \
 			  mtk_hdmi_ddc.o
 
 obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mediatek-drm-hdmi.o
+
+obj-$(CONFIG_DRM_MEDIATEK_DP) += mtk_dp.o
diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c
new file mode 100644
index 000000000000..e2ec9b02b1aa
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -0,0 +1,1999 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019-2022 MediaTek Inc.
+ * Copyright (c) 2022 BayLibre
+ */
+
+#include <drm/display/drm_dp.h>
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+#include <linux/arm-smccc.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/media-bus-format.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/soc/mediatek/mtk_sip_svc.h>
+#include <video/videomode.h>
+
+#include "mtk_dp_reg.h"
+
+#define MTK_DP_SIP_CONTROL_AARCH32	MTK_SIP_SMC_CMD(0x523)
+#define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE	(BIT(0) | BIT(5))
+
+#define MTK_DP_THREAD_CABLE_STATE_CHG	BIT(0)
+#define MTK_DP_THREAD_HPD_EVENT		BIT(1)
+
+#define MTK_DP_4P1T 4
+#define MTK_DP_HDE 2
+#define MTK_DP_PIX_PER_ADDR 2
+#define MTK_DP_AUX_WAIT_REPLY_COUNT 20
+#define MTK_DP_TBC_BUF_READ_START_ADDR 0x8
+#define MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY 5
+#define MTK_DP_TRAIN_DOWNSCALE_RETRY 10
+
+enum {
+	MTK_DP_CAL_GLB_BIAS_TRIM = 0,
+	MTK_DP_CAL_CLKTX_IMPSE,
+	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0,
+	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1,
+	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2,
+	MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3,
+	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0,
+	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1,
+	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2,
+	MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3,
+	MTK_DP_CAL_MAX,
+};
+
+struct mtk_dp_train_info {
+	bool sink_ssc;
+	bool cable_plugged_in;
+	/* link_rate is in multiple of 0.27Gbps */
+	int link_rate;
+	int lane_count;
+	unsigned int channel_eq_pattern;
+};
+
+struct mtk_dp_info {
+	enum dp_pixelformat format;
+	struct videomode vm;
+};
+
+struct mtk_dp_efuse_fmt {
+	unsigned short idx;
+	unsigned short shift;
+	unsigned short mask;
+	unsigned short min_val;
+	unsigned short max_val;
+	unsigned short default_val;
+};
+
+struct mtk_dp {
+	bool enabled;
+	u8 max_lanes;
+	u8 max_linkrate;
+	u8 rx_cap[DP_RECEIVER_CAP_SIZE];
+	u32 cal_data[MTK_DP_CAL_MAX];
+	u32 irq_thread_handle;
+	/* irq_thread_lock is used to protect irq_thread_handle */
+	spinlock_t irq_thread_lock;
+
+	struct device *dev;
+	struct drm_bridge bridge;
+	struct drm_bridge *next_bridge;
+	struct drm_connector *conn;
+	struct drm_device *drm_dev;
+	struct drm_dp_aux aux;
+
+	struct mtk_dp_info info;
+	struct mtk_dp_train_info train_info;
+
+	struct platform_device *phy_dev;
+	struct phy *phy;
+	struct regmap *regs;
+};
+
+static const struct mtk_dp_efuse_fmt mtk_dp_efuse_data[MTK_DP_CAL_MAX] = {
+	[MTK_DP_CAL_GLB_BIAS_TRIM] = {
+		.idx = 3,
+		.shift = 27,
+		.mask = 0x1f,
+		.min_val = 1,
+		.max_val = 0x1e,
+		.default_val = 0xf,
+	},
+	[MTK_DP_CAL_CLKTX_IMPSE] = {
+		.idx = 0,
+		.shift = 9,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+	[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
+		.idx = 2,
+		.shift = 28,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+	[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
+		.idx = 2,
+		.shift = 20,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+	[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
+		.idx = 2,
+		.shift = 12,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+	[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
+		.idx = 2,
+		.shift = 4,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+	[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
+		.idx = 2,
+		.shift = 24,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+	[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
+		.idx = 2,
+		.shift = 16,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+	[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
+		.idx = 2,
+		.shift = 8,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+	[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
+		.idx = 2,
+		.shift = 0,
+		.mask = 0xf,
+		.min_val = 1,
+		.max_val = 0xe,
+		.default_val = 0x8,
+	},
+};
+
+static struct regmap_config mtk_dp_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+	.max_register = SEC_OFFSET + 0x90,
+	.name = "mtk-dp-registers",
+};
+
+static struct mtk_dp *mtk_dp_from_bridge(struct drm_bridge *b)
+{
+	return container_of(b, struct mtk_dp, bridge);
+}
+
+static u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset)
+{
+	u32 read_val;
+	int ret;
+
+	ret = regmap_read(mtk_dp->regs, offset, &read_val);
+	if (ret) {
+		dev_err(mtk_dp->dev, "Failed to read register 0x%x: %d\n",
+			offset, ret);
+		return 0;
+	}
+
+	return read_val;
+}
+
+static int mtk_dp_write(struct mtk_dp *mtk_dp, u32 offset, u32 val)
+{
+	int ret = regmap_write(mtk_dp->regs, offset, val);
+
+	if (ret)
+		dev_err(mtk_dp->dev,
+			"Failed to write register 0x%x with value 0x%x\n",
+			offset, val);
+	return ret;
+}
+
+static int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset,
+			      u32 val, u32 mask)
+{
+	int ret = regmap_update_bits(mtk_dp->regs, offset, mask, val);
+
+	if (ret)
+		dev_err(mtk_dp->dev,
+			"Failed to update register 0x%x with value 0x%x, mask 0x%x\n",
+			offset, val, mask);
+	return ret;
+}
+
+static void mtk_dp_bulk_16bit_write(struct mtk_dp *mtk_dp, u32 offset, u8 *buf,
+				    size_t length)
+{
+	int i;
+
+	/* 2 bytes per register */
+	for (i = 0; i < length; i += 2) {
+		u32 val = buf[i] | (i + 1 < length ? buf[i + 1] << 8 : 0);
+
+		if (mtk_dp_write(mtk_dp, offset + i * 2, val))
+			return;
+	}
+}
+
+static void mtk_dp_msa_bypass_enable(struct mtk_dp *mtk_dp, bool enable)
+{
+	u32 mask = HTOTAL_SEL_DP_ENC0_P0 | VTOTAL_SEL_DP_ENC0_P0 |
+		   HSTART_SEL_DP_ENC0_P0 | VSTART_SEL_DP_ENC0_P0 |
+		   HWIDTH_SEL_DP_ENC0_P0 | VHEIGHT_SEL_DP_ENC0_P0 |
+		   HSP_SEL_DP_ENC0_P0 | HSW_SEL_DP_ENC0_P0 |
+		   VSP_SEL_DP_ENC0_P0 | VSW_SEL_DP_ENC0_P0;
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3030, enable ? 0 : mask, mask);
+}
+
+static void mtk_dp_set_msa(struct mtk_dp *mtk_dp)
+{
+	struct drm_display_mode mode;
+	struct videomode *vm = &mtk_dp->info.vm;
+
+	drm_display_mode_from_videomode(vm, &mode);
+
+	/* horizontal */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3010,
+			   mode.htotal, HTOTAL_SW_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3018,
+			   vm->hsync_len + vm->hback_porch,
+			   HSTART_SW_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
+			   vm->hsync_len, HSW_SW_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
+			   0, HSP_SW_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3020,
+			   vm->hactive, HWIDTH_SW_DP_ENC0_P0_MASK);
+
+	/* vertical */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3014,
+			   mode.vtotal, VTOTAL_SW_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_301C,
+			   vm->vsync_len + vm->vback_porch,
+			   VSTART_SW_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
+			   vm->vsync_len, VSW_SW_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
+			   0, VSP_SW_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3024,
+			   vm->vactive, VHEIGHT_SW_DP_ENC0_P0_MASK);
+
+	/* horizontal */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3064,
+			   vm->hactive, HDE_NUM_LAST_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3154,
+			   mode.htotal, PGEN_HTOTAL_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3158,
+			   vm->hfront_porch,
+			   PGEN_HSYNC_RISING_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_315C,
+			   vm->hsync_len,
+			   PGEN_HSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3160,
+			   vm->hback_porch + vm->hsync_len,
+			   PGEN_HFDE_START_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3164,
+			   vm->hactive,
+			   PGEN_HFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
+
+	/* vertical */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3168,
+			   mode.vtotal,
+			   PGEN_VTOTAL_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_316C,
+			   vm->vfront_porch,
+			   PGEN_VSYNC_RISING_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3170,
+			   vm->vsync_len,
+			   PGEN_VSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3174,
+			   vm->vback_porch + vm->vsync_len,
+			   PGEN_VFDE_START_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3178,
+			   vm->vactive,
+			   PGEN_VFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
+}
+
+static int mtk_dp_set_color_format(struct mtk_dp *mtk_dp,
+				   enum dp_pixelformat color_format)
+{
+	u32 val;
+
+	/* update MISC0 */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
+			   color_format << DP_TEST_COLOR_FORMAT_SHIFT,
+			   DP_TEST_COLOR_FORMAT_MASK);
+
+	switch (color_format) {
+	case DP_PIXELFORMAT_YUV422:
+		val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR422;
+		break;
+	case DP_PIXELFORMAT_RGB:
+		val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_RGB;
+		break;
+	default:
+		drm_warn(mtk_dp->drm_dev, "Unsupported color format: %d\n",
+			 color_format);
+		return -EINVAL;
+	}
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
+			   val, PIXEL_ENCODE_FORMAT_DP_ENC0_P0_MASK);
+	return 0;
+}
+
+static void mtk_dp_set_color_depth(struct mtk_dp *mtk_dp)
+{
+	/* Only support 8 bits currently */
+	/* Update MISC0 */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
+			   DP_MSA_MISC_8_BPC, DP_TEST_BIT_DEPTH_MASK);
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
+			   VIDEO_COLOR_DEPTH_DP_ENC0_P0_8BIT,
+			   VIDEO_COLOR_DEPTH_DP_ENC0_P0_MASK);
+}
+
+static void mtk_dp_config_mn_mode(struct mtk_dp *mtk_dp)
+{
+	/* 0: hw mode, 1: sw mode */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
+			   0, VIDEO_M_CODE_SEL_DP_ENC0_P0_MASK);
+}
+
+static void mtk_dp_set_sram_read_start(struct mtk_dp *mtk_dp, u32 val)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
+			   val, SRAM_START_READ_THRD_DP_ENC0_P0_MASK);
+}
+
+static void mtk_dp_setup_encoder(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
+			   VIDEO_MN_GEN_EN_DP_ENC0_P0,
+			   VIDEO_MN_GEN_EN_DP_ENC0_P0);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040,
+			   SDP_DOWN_CNT_DP_ENC0_P0_VAL,
+			   SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
+			   SDP_DOWN_CNT_IN_HBLANK_DP_ENC1_P0_VAL,
+			   SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3300,
+			   VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_VAL << 8,
+			   VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
+			   FIFO_READ_START_POINT_DP_ENC1_P0_VAL << 12,
+			   FIFO_READ_START_POINT_DP_ENC1_P0_MASK);
+	mtk_dp_write(mtk_dp, MTK_DP_ENC1_P0_3368, DP_ENC1_P0_3368_VAL);
+}
+
+static void mtk_dp_pg_enable(struct mtk_dp *mtk_dp, bool enable)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3038,
+			   enable ? VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK : 0,
+			   VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31B0,
+			   PGEN_PATTERN_SEL_VAL << 4, PGEN_PATTERN_SEL_MASK);
+}
+
+static void mtk_dp_aux_irq_clear(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_write(mtk_dp, MTK_DP_AUX_P0_3640, DP_AUX_P0_3640_VAL);
+}
+
+static void mtk_dp_aux_set_cmd(struct mtk_dp *mtk_dp, u8 cmd, u32 addr)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3644,
+			   cmd, MCU_REQUEST_COMMAND_AUX_TX_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3648,
+			   addr, MCU_REQUEST_ADDRESS_LSB_AUX_TX_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_364C,
+			   addr >> 16, MCU_REQUEST_ADDRESS_MSB_AUX_TX_P0_MASK);
+}
+
+static void mtk_dp_aux_clear_fifo(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
+			   MCU_ACK_TRAN_COMPLETE_AUX_TX_P0,
+			   MCU_ACK_TRAN_COMPLETE_AUX_TX_P0 |
+			   PHY_FIFO_RST_AUX_TX_P0_MASK |
+			   MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
+}
+
+static void mtk_dp_aux_request_ready(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3630,
+			   AUX_TX_REQUEST_READY_AUX_TX_P0,
+			   AUX_TX_REQUEST_READY_AUX_TX_P0);
+}
+
+static void mtk_dp_aux_fill_write_fifo(struct mtk_dp *mtk_dp, u8 *buf,
+				       size_t length)
+{
+	mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_AUX_P0_3708, buf, length);
+}
+
+static void mtk_dp_aux_read_rx_fifo(struct mtk_dp *mtk_dp, u8 *buf,
+				    size_t length, int read_delay)
+{
+	int read_pos;
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
+			   0, AUX_RD_MODE_AUX_TX_P0_MASK);
+
+	for (read_pos = 0; read_pos < length; read_pos++) {
+		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
+				   AUX_RX_FIFO_READ_PULSE_TX_P0,
+				   AUX_RX_FIFO_READ_PULSE_TX_P0);
+
+		/* Hardware needs time to update the data */
+		usleep_range(read_delay, read_delay * 2);
+		buf[read_pos] = (u8)(mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3620) &
+				     AUX_RX_FIFO_READ_DATA_AUX_TX_P0_MASK);
+	}
+}
+
+static void mtk_dp_aux_set_length(struct mtk_dp *mtk_dp, size_t length)
+{
+	if (length > 0) {
+		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
+				   (length - 1) << 12,
+				   MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
+		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
+				   0,
+				   AUX_NO_LENGTH_AUX_TX_P0 |
+				   AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
+				   AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
+	} else {
+		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
+				   AUX_NO_LENGTH_AUX_TX_P0,
+				   AUX_NO_LENGTH_AUX_TX_P0 |
+				   AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
+				   AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
+	}
+}
+
+static int mtk_dp_aux_wait_for_completion(struct mtk_dp *mtk_dp, bool is_read)
+{
+	int wait_reply = MTK_DP_AUX_WAIT_REPLY_COUNT;
+
+	while (--wait_reply) {
+		u32 aux_irq_status;
+
+		if (is_read) {
+			u32 fifo_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3618);
+
+			if (fifo_status &
+			    (AUX_RX_FIFO_WRITE_POINTER_AUX_TX_P0_MASK |
+			     AUX_RX_FIFO_FULL_AUX_TX_P0_MASK)) {
+				return 0;
+			}
+		}
+
+		aux_irq_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3640);
+		if (aux_irq_status & AUX_RX_AUX_RECV_COMPLETE_IRQ_AUX_TX_P0)
+			return 0;
+
+		if (aux_irq_status & AUX_400US_TIMEOUT_IRQ_AUX_TX_P0)
+			return -ETIMEDOUT;
+
+		/* Give the hardware a chance to reach completion before retrying */
+		usleep_range(100, 500);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int mtk_dp_aux_do_transfer(struct mtk_dp *mtk_dp, bool is_read, u8 cmd,
+				  u32 addr, u8 *buf, size_t length)
+{
+	int ret;
+	u32 reply_cmd;
+
+	if (is_read && (length > DP_AUX_MAX_PAYLOAD_BYTES ||
+			(cmd == DP_AUX_NATIVE_READ && !length)))
+		return -EINVAL;
+
+	if (!is_read)
+		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
+				   AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0,
+				   AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0);
+
+	/* We need to clear fifo and irq before sending commands to the sink device. */
+	mtk_dp_aux_clear_fifo(mtk_dp);
+	mtk_dp_aux_irq_clear(mtk_dp);
+
+	mtk_dp_aux_set_cmd(mtk_dp, cmd, addr);
+	mtk_dp_aux_set_length(mtk_dp, length);
+
+	if (!is_read) {
+		if (length)
+			mtk_dp_aux_fill_write_fifo(mtk_dp, buf, length);
+
+		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
+				   AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK,
+				   AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK);
+	}
+
+	mtk_dp_aux_request_ready(mtk_dp);
+
+	/* Wait for feedback from sink device. */
+	ret = mtk_dp_aux_wait_for_completion(mtk_dp, is_read);
+
+	reply_cmd = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3624) &
+		    AUX_RX_REPLY_COMMAND_AUX_TX_P0_MASK;
+
+	if (ret || reply_cmd) {
+		u32 phy_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3628) &
+				 AUX_RX_PHY_STATE_AUX_TX_P0_MASK;
+		if (phy_status != AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE) {
+			drm_err(mtk_dp->drm_dev,
+				"AUX Rx Aux hang, need SW reset\n");
+			return -EIO;
+		}
+
+		return -ETIMEDOUT;
+	}
+
+	if (!length) {
+		mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
+				   0,
+				   AUX_NO_LENGTH_AUX_TX_P0 |
+				   AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
+				   AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
+	} else if (is_read) {
+		int read_delay;
+
+		if (cmd == (DP_AUX_I2C_READ | DP_AUX_I2C_MOT) ||
+		    cmd == DP_AUX_I2C_READ)
+			read_delay = 500;
+		else
+			read_delay = 100;
+
+		mtk_dp_aux_read_rx_fifo(mtk_dp, buf, length, read_delay);
+	}
+
+	return 0;
+}
+
+static void mtk_dp_set_swing_pre_emphasis(struct mtk_dp *mtk_dp, int lane_num,
+					  int swing_val, int preemphasis)
+{
+	u32 lane_shift = lane_num * DP_TX1_VOLT_SWING_SHIFT;
+
+	dev_dbg(mtk_dp->dev,
+		"link training: swing_val = 0x%x, pre-emphasis = 0x%x\n",
+		swing_val, preemphasis);
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
+			   swing_val << (DP_TX0_VOLT_SWING_SHIFT + lane_shift),
+			   DP_TX0_VOLT_SWING_MASK << lane_shift);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
+			   preemphasis << (DP_TX0_PRE_EMPH_SHIFT + lane_shift),
+			   DP_TX0_PRE_EMPH_MASK << lane_shift);
+}
+
+static void mtk_dp_reset_swing_pre_emphasis(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
+			   0,
+			   DP_TX0_VOLT_SWING_MASK |
+			   DP_TX1_VOLT_SWING_MASK |
+			   DP_TX2_VOLT_SWING_MASK |
+			   DP_TX3_VOLT_SWING_MASK |
+			   DP_TX0_PRE_EMPH_MASK |
+			   DP_TX1_PRE_EMPH_MASK |
+			   DP_TX2_PRE_EMPH_MASK |
+			   DP_TX3_PRE_EMPH_MASK);
+}
+
+static u32 mtk_dp_swirq_get_clear(struct mtk_dp *mtk_dp)
+{
+	u32 irq_status = mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_35D0) &
+			 SW_IRQ_FINAL_STATUS_DP_TRANS_P0_MASK;
+
+	if (irq_status) {
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
+				   irq_status, SW_IRQ_CLR_DP_TRANS_P0_MASK);
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
+				   0, SW_IRQ_CLR_DP_TRANS_P0_MASK);
+	}
+
+	return irq_status;
+}
+
+static u32 mtk_dp_hwirq_get_clear(struct mtk_dp *mtk_dp)
+{
+	u32 irq_status = (mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3418) &
+			  IRQ_STATUS_DP_TRANS_P0_MASK) >> 12;
+
+	if (irq_status) {
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
+				   irq_status, IRQ_CLR_DP_TRANS_P0_MASK);
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
+				   0, IRQ_CLR_DP_TRANS_P0_MASK);
+	}
+
+	return irq_status;
+}
+
+static void mtk_dp_hwirq_enable(struct mtk_dp *mtk_dp, bool enable)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
+			   enable ? 0 :
+			   IRQ_MASK_DP_TRANS_P0_DISC_IRQ |
+			   IRQ_MASK_DP_TRANS_P0_CONN_IRQ |
+			   IRQ_MASK_DP_TRANS_P0_INT_IRQ,
+			   IRQ_MASK_DP_TRANS_P0_MASK);
+}
+
+static void mtk_dp_initialize_settings(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_342C,
+			   XTAL_FREQ_DP_TRANS_P0_DEFAULT,
+			   XTAL_FREQ_DP_TRANS_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3540,
+			   FEC_CLOCK_EN_MODE_DP_TRANS_P0,
+			   FEC_CLOCK_EN_MODE_DP_TRANS_P0);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31EC,
+			   AUDIO_CH_SRC_SEL_DP_ENC0_P0,
+			   AUDIO_CH_SRC_SEL_DP_ENC0_P0);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
+			   0, SDP_VSYNC_RISING_MASK_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_IRQ_MASK,
+			   IRQ_MASK_AUX_TOP_IRQ, IRQ_MASK_AUX_TOP_IRQ);
+}
+
+static void mtk_dp_initialize_hpd_detect_settings(struct mtk_dp *mtk_dp)
+{
+	u32 val;
+	/* Debounce threshold */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
+			   8, HPD_DEB_THD_DP_TRANS_P0_MASK);
+
+	val = (HPD_INT_THD_DP_TRANS_P0_LOWER_500US |
+	       HPD_INT_THD_DP_TRANS_P0_UPPER_1100US) << 4;
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
+			   val, HPD_INT_THD_DP_TRANS_P0_MASK);
+
+	/*
+	 * Connect threshold 1.5ms + 5 x 0.1ms = 2ms
+	 * Disconnect threshold 1.5ms + 5 x 0.1ms = 2ms
+	 */
+	val = (5 << 8) | (5 << 12);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
+			   val,
+			   HPD_DISC_THD_DP_TRANS_P0_MASK |
+			   HPD_CONN_THD_DP_TRANS_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3430,
+			   HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT,
+			   HPD_INT_THD_ECO_DP_TRANS_P0_MASK);
+}
+
+static void mtk_dp_initialize_aux_settings(struct mtk_dp *mtk_dp)
+{
+	/* modify timeout threshold = 0x1595 */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_360C,
+			   AUX_TIMEOUT_THR_AUX_TX_P0_VAL,
+			   AUX_TIMEOUT_THR_AUX_TX_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3658,
+			   0, AUX_TX_OV_EN_AUX_TX_P0_MASK);
+	/* 25 for 26M */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3634,
+			   AUX_TX_OVER_SAMPLE_RATE_FOR_26M << 8,
+			   AUX_TX_OVER_SAMPLE_RATE_AUX_TX_P0_MASK);
+	/* 13 for 26M */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3614,
+			   AUX_RX_UI_CNT_THR_AUX_FOR_26M,
+			   AUX_RX_UI_CNT_THR_AUX_TX_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_37C8,
+			   MTK_ATOP_EN_AUX_TX_P0,
+			   MTK_ATOP_EN_AUX_TX_P0);
+}
+
+static void mtk_dp_initialize_digital_settings(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
+			   0, VBID_VIDEO_MUTE_DP_ENC0_P0_MASK);
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3368,
+			   BS2BS_MODE_DP_ENC1_P0_VAL << 12,
+			   BS2BS_MODE_DP_ENC1_P0_MASK);
+
+	/* dp tx encoder reset all sw */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
+			   DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0,
+			   DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
+
+	/* Wait for sw reset to complete */
+	usleep_range(1000, 5000);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
+			   0, DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
+}
+
+static void mtk_dp_digital_sw_reset(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
+			   DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0,
+			   DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
+
+	/* Wait for sw reset to complete */
+	usleep_range(1000, 5000);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
+			   0, DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
+}
+
+static void mtk_dp_set_lanes(struct mtk_dp *mtk_dp, int lanes)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35F0,
+			   lanes == 0 ? 0 : DP_TRANS_DUMMY_RW_0,
+			   DP_TRANS_DUMMY_RW_0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
+			   lanes, LANE_NUM_DP_ENC0_P0_MASK);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4,
+			   lanes << 2, LANE_NUM_DP_TRANS_P0_MASK);
+}
+
+static void mtk_dp_get_calibration_data(struct mtk_dp *mtk_dp)
+{
+	const struct mtk_dp_efuse_fmt *fmt;
+	struct device *dev = mtk_dp->dev;
+	struct nvmem_cell *cell;
+	u32 *cal_data = mtk_dp->cal_data;
+	u32 *buf;
+	int i;
+	size_t len;
+
+	cell = nvmem_cell_get(dev, "dp_calibration_data");
+	if (IS_ERR(cell)) {
+		dev_warn(dev, "Failed to get nvmem cell dp_calibration_data\n");
+		goto use_default_val;
+	}
+
+	buf = (u32 *)nvmem_cell_read(cell, &len);
+	nvmem_cell_put(cell);
+
+	if (IS_ERR(buf) || ((len / sizeof(u32)) != 4)) {
+		dev_warn(dev, "Failed to read nvmem_cell_read\n");
+
+		if (!IS_ERR(buf))
+			kfree(buf);
+
+		goto use_default_val;
+	}
+
+	for (i = 0; i < MTK_DP_CAL_MAX; i++) {
+		fmt = &mtk_dp_efuse_data[i];
+		cal_data[i] = (buf[fmt->idx] >> fmt->shift) & fmt->mask;
+
+		if (cal_data[i] < fmt->min_val || cal_data[i] > fmt->max_val) {
+			dev_warn(mtk_dp->dev, "Invalid efuse data, idx = %d\n", i);
+			kfree(buf);
+			goto use_default_val;
+		}
+	}
+	kfree(buf);
+
+	return;
+
+use_default_val:
+	dev_warn(mtk_dp->dev, "Use default calibration data\n");
+	for (i = 0; i < MTK_DP_CAL_MAX; i++)
+		cal_data[i] = mtk_dp_efuse_data[i].default_val;
+}
+
+static void mtk_dp_set_calibration_data(struct mtk_dp *mtk_dp)
+{
+	u32 *cal_data = mtk_dp->cal_data;
+
+	mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_DPAUX_TX,
+			   cal_data[MTK_DP_CAL_CLKTX_IMPSE] << 20,
+			   RG_CKM_PT0_CKTX_IMPSEL);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_BIAS_GEN_00,
+			   cal_data[MTK_DP_CAL_GLB_BIAS_TRIM] << 16,
+			   RG_XTP_GLB_BIAS_INTR_CTRL);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
+			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] << 12,
+			   RG_XTP_LN0_TX_IMPSEL_PMOS);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
+			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] << 16,
+			   RG_XTP_LN0_TX_IMPSEL_NMOS);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
+			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] << 12,
+			   RG_XTP_LN1_TX_IMPSEL_PMOS);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
+			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] << 16,
+			   RG_XTP_LN1_TX_IMPSEL_NMOS);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
+			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] << 12,
+			   RG_XTP_LN2_TX_IMPSEL_PMOS);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
+			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] << 16,
+			   RG_XTP_LN2_TX_IMPSEL_NMOS);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
+			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] << 12,
+			   RG_XTP_LN3_TX_IMPSEL_PMOS);
+	mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
+			   cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] << 16,
+			   RG_XTP_LN3_TX_IMPSEL_NMOS);
+}
+
+static int mtk_dp_phy_configure(struct mtk_dp *mtk_dp,
+				u32 link_rate, int lane_count)
+{
+	int ret;
+	union phy_configure_opts phy_opts = {
+		.dp = {
+			.link_rate = drm_dp_bw_code_to_link_rate(link_rate) / 100,
+			.set_rate = 1,
+			.lanes = lane_count,
+			.set_lanes = 1,
+			.ssc = mtk_dp->train_info.sink_ssc,
+		}
+	};
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, DP_PWR_STATE_BANDGAP,
+			   DP_PWR_STATE_MASK);
+
+	ret = phy_configure(mtk_dp->phy, &phy_opts);
+	if (ret)
+		return ret;
+
+	mtk_dp_set_calibration_data(mtk_dp);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
+			   DP_PWR_STATE_BANDGAP_TPLL_LANE, DP_PWR_STATE_MASK);
+
+	return 0;
+}
+
+static void mtk_dp_set_idle_pattern(struct mtk_dp *mtk_dp, bool enable)
+{
+	u32 val = POST_MISC_DATA_LANE0_OV_DP_TRANS_P0_MASK |
+		  POST_MISC_DATA_LANE1_OV_DP_TRANS_P0_MASK |
+		  POST_MISC_DATA_LANE2_OV_DP_TRANS_P0_MASK |
+		  POST_MISC_DATA_LANE3_OV_DP_TRANS_P0_MASK;
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3580,
+			   enable ? val : 0, val);
+}
+
+static void mtk_dp_train_set_pattern(struct mtk_dp *mtk_dp, int pattern)
+{
+	/* TPS1 */
+	if (pattern == 1)
+		mtk_dp_set_idle_pattern(mtk_dp, false);
+
+	mtk_dp_update_bits(mtk_dp,
+			   MTK_DP_TRANS_P0_3400,
+			   pattern ? BIT(pattern - 1) << 12 : 0,
+			   PATTERN1_EN_DP_TRANS_P0_MASK |
+			   PATTERN2_EN_DP_TRANS_P0_MASK |
+			   PATTERN3_EN_DP_TRANS_P0_MASK |
+			   PATTERN4_EN_DP_TRANS_P0_MASK);
+}
+
+static void mtk_dp_set_enhanced_frame_mode(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
+			   ENHANCED_FRAME_EN_DP_ENC0_P0,
+			   ENHANCED_FRAME_EN_DP_ENC0_P0);
+}
+
+static void mtk_dp_training_set_scramble(struct mtk_dp *mtk_dp, bool enable)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3404,
+			   enable ? DP_SCR_EN_DP_TRANS_P0_MASK : 0,
+			   DP_SCR_EN_DP_TRANS_P0_MASK);
+}
+
+static void mtk_dp_video_mute(struct mtk_dp *mtk_dp, bool enable)
+{
+	struct arm_smccc_res res;
+	u32 val = VIDEO_MUTE_SEL_DP_ENC0_P0 |
+		  (enable ? VIDEO_MUTE_SW_DP_ENC0_P0 : 0);
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
+			   val,
+			   VIDEO_MUTE_SEL_DP_ENC0_P0 |
+			   VIDEO_MUTE_SW_DP_ENC0_P0);
+
+	arm_smccc_smc(MTK_DP_SIP_CONTROL_AARCH32,
+		      MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE, enable,
+		      0, 0, 0, 0, 0, &res);
+
+	dev_dbg(mtk_dp->dev, "smc cmd: 0x%x, p1: 0x%x, ret: 0x%lx-0x%lx\n",
+		MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE, enable, res.a0, res.a1);
+}
+
+static void mtk_dp_power_enable(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
+			   0, SW_RST_B_PHYD);
+
+	/* Wait for power enable */
+	usleep_range(10, 200);
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
+			   SW_RST_B_PHYD, SW_RST_B_PHYD);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
+			   DP_PWR_STATE_BANDGAP_TPLL, DP_PWR_STATE_MASK);
+	mtk_dp_write(mtk_dp, MTK_DP_1040,
+		     RG_DPAUX_RX_VALID_DEGLITCH_EN | RG_XTP_GLB_CKDET_EN |
+		     RG_DPAUX_RX_EN);
+	mtk_dp_update_bits(mtk_dp, MTK_DP_0034, 0, DA_CKM_CKTX0_EN_FORCE_EN);
+}
+
+static void mtk_dp_power_disable(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_write(mtk_dp, MTK_DP_TOP_PWR_STATE, 0);
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_0034,
+			   DA_CKM_CKTX0_EN_FORCE_EN, DA_CKM_CKTX0_EN_FORCE_EN);
+
+	/* Disable RX */
+	mtk_dp_write(mtk_dp, MTK_DP_1040, 0);
+	mtk_dp_write(mtk_dp, MTK_DP_TOP_MEM_PD,
+		     0x550 | FUSE_SEL | MEM_ISO_EN);
+}
+
+static void mtk_dp_initialize_priv_data(struct mtk_dp *mtk_dp)
+{
+	mtk_dp->train_info.link_rate = DP_LINK_BW_5_4;
+	mtk_dp->train_info.lane_count = mtk_dp->max_lanes;
+	mtk_dp->train_info.cable_plugged_in = false;
+
+	mtk_dp->info.format = DP_PIXELFORMAT_RGB;
+	memset(&mtk_dp->info.vm, 0, sizeof(struct videomode));
+}
+
+static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp)
+{
+	u32 sram_read_start = min_t(u32, MTK_DP_TBC_BUF_READ_START_ADDR,
+				    mtk_dp->info.vm.hactive /
+				    mtk_dp->train_info.lane_count /
+				    MTK_DP_4P1T / MTK_DP_HDE /
+				    MTK_DP_PIX_PER_ADDR);
+	mtk_dp_set_sram_read_start(mtk_dp, sram_read_start);
+	mtk_dp_setup_encoder(mtk_dp);
+}
+
+static void mtk_dp_set_tx_out(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_setup_tu(mtk_dp);
+}
+
+static void mtk_dp_train_update_swing_pre(struct mtk_dp *mtk_dp, int lanes,
+					  u8 dpcd_adjust_req[2])
+{
+	int lane;
+
+	for (lane = 0; lane < lanes; ++lane) {
+		u8 val;
+		u8 swing;
+		u8 preemphasis;
+		int index = lane / 2;
+		int shift = lane % 2 ? DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : 0;
+
+		swing = (dpcd_adjust_req[index] >> shift) &
+			DP_ADJUST_VOLTAGE_SWING_LANE0_MASK;
+		preemphasis = ((dpcd_adjust_req[index] >> shift) &
+			       DP_ADJUST_PRE_EMPHASIS_LANE0_MASK) >>
+			      DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT;
+		val = swing << DP_TRAIN_VOLTAGE_SWING_SHIFT |
+		      preemphasis << DP_TRAIN_PRE_EMPHASIS_SHIFT;
+
+		if (swing == DP_TRAIN_VOLTAGE_SWING_LEVEL_3)
+			val |= DP_TRAIN_MAX_SWING_REACHED;
+		if (preemphasis == 3)
+			val |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
+
+		mtk_dp_set_swing_pre_emphasis(mtk_dp, lane, swing, preemphasis);
+		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_LANE0_SET + lane,
+				   val);
+	}
+}
+
+static void mtk_dp_pattern(struct mtk_dp *mtk_dp, bool is_tps1)
+{
+	int pattern;
+	unsigned int aux_offset;
+
+	if (is_tps1) {
+		pattern = 1;
+		aux_offset = DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_1;
+	} else {
+		aux_offset = mtk_dp->train_info.channel_eq_pattern;
+
+		switch (mtk_dp->train_info.channel_eq_pattern) {
+		case DP_TRAINING_PATTERN_4:
+			pattern = 4;
+			break;
+		case DP_TRAINING_PATTERN_3:
+			pattern = 3;
+			aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
+			break;
+		case DP_TRAINING_PATTERN_2:
+		default:
+			pattern = 2;
+			aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
+			break;
+		}
+	}
+
+	mtk_dp_train_set_pattern(mtk_dp, pattern);
+	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET, aux_offset);
+}
+
+static int mtk_dp_train_setting(struct mtk_dp *mtk_dp, u8 target_link_rate,
+				u8 target_lane_count)
+{
+	int ret;
+
+	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LINK_BW_SET, target_link_rate);
+	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LANE_COUNT_SET,
+			   target_lane_count | DP_LANE_COUNT_ENHANCED_FRAME_EN);
+
+	if (mtk_dp->train_info.sink_ssc)
+		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_DOWNSPREAD_CTRL,
+				   DP_SPREAD_AMP_0_5);
+
+	mtk_dp_set_lanes(mtk_dp, target_lane_count / 2);
+	ret = mtk_dp_phy_configure(mtk_dp, target_link_rate, target_lane_count);
+	if (ret)
+		return ret;
+
+	dev_dbg(mtk_dp->dev,
+		"Link train target_link_rate = 0x%x, target_lane_count = 0x%x\n",
+		target_link_rate, target_lane_count);
+
+	return 0;
+}
+
+static int mtk_dp_train_cr(struct mtk_dp *mtk_dp, u8 target_lane_count)
+{
+	u8 lane_adjust[2] = {};
+	u8 link_status[DP_LINK_STATUS_SIZE] = {};
+	u8 prev_lane_adjust = 0xff;
+	int train_retries = 0;
+	int voltage_retries = 0;
+
+	mtk_dp_pattern(mtk_dp, true);
+
+	/* In DP spec 1.4, the retry count of CR is defined as 10. */
+	do {
+		train_retries++;
+		if (!mtk_dp->train_info.cable_plugged_in) {
+			mtk_dp_train_set_pattern(mtk_dp, 0);
+			return -ENODEV;
+		}
+
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_ADJUST_REQUEST_LANE0_1,
+				 lane_adjust, sizeof(lane_adjust));
+		mtk_dp_train_update_swing_pre(mtk_dp, target_lane_count,
+					      lane_adjust);
+
+		drm_dp_link_train_clock_recovery_delay(&mtk_dp->aux,
+						       mtk_dp->rx_cap);
+
+		/* check link status from sink device */
+		drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status);
+		if (drm_dp_clock_recovery_ok(link_status,
+					     target_lane_count)) {
+			dev_dbg(mtk_dp->dev, "Link train CR pass\n");
+			return 0;
+		}
+
+		/*
+		 * In DP spec 1.4, if current voltage level is the same
+		 * with previous voltage level, we need to retry 5 times.
+		 */
+		if (prev_lane_adjust == link_status[4]) {
+			voltage_retries++;
+			/*
+			 * Condition of CR fail:
+			 * 1. Failed to pass CR using the same voltage
+			 *    level over five times.
+			 * 2. Failed to pass CR when the current voltage
+			 *    level is the same with previous voltage
+			 *    level and reach max voltage level (3).
+			 */
+			if (voltage_retries > MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY ||
+			    (prev_lane_adjust & DP_ADJUST_VOLTAGE_SWING_LANE0_MASK) == 3) {
+				dev_dbg(mtk_dp->dev, "Link train CR fail\n");
+				break;
+			}
+		} else {
+			/*
+			 * If the voltage level is changed, we need to
+			 * re-calculate this retry count.
+			 */
+			voltage_retries = 0;
+		}
+		prev_lane_adjust = link_status[4];
+	} while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
+
+	/* Failed to train CR, and disable pattern. */
+	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
+			   DP_TRAINING_PATTERN_DISABLE);
+	mtk_dp_train_set_pattern(mtk_dp, 0);
+
+	return -ETIMEDOUT;
+}
+
+static int mtk_dp_train_eq(struct mtk_dp *mtk_dp, u8 target_lane_count)
+{
+	u8 lane_adjust[2] = {};
+	u8 link_status[DP_LINK_STATUS_SIZE] = {};
+	int train_retries = 0;
+
+	mtk_dp_pattern(mtk_dp, false);
+
+	do {
+		train_retries++;
+		if (!mtk_dp->train_info.cable_plugged_in) {
+			mtk_dp_train_set_pattern(mtk_dp, 0);
+			return -ENODEV;
+		}
+
+		drm_dp_dpcd_read(&mtk_dp->aux, DP_ADJUST_REQUEST_LANE0_1,
+				 lane_adjust, sizeof(lane_adjust));
+		mtk_dp_train_update_swing_pre(mtk_dp, target_lane_count,
+					      lane_adjust);
+
+		drm_dp_link_train_channel_eq_delay(&mtk_dp->aux,
+						   mtk_dp->rx_cap);
+
+		/* check link status from sink device */
+		drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status);
+		if (drm_dp_channel_eq_ok(link_status, target_lane_count)) {
+			dev_dbg(mtk_dp->dev, "Link train EQ pass\n");
+
+			/* Training done, and disable pattern. */
+			drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
+					   DP_TRAINING_PATTERN_DISABLE);
+			mtk_dp_train_set_pattern(mtk_dp, 0);
+			return 0;
+		}
+		dev_dbg(mtk_dp->dev, "Link train EQ fail\n");
+	} while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
+
+	/* Failed to train EQ, and disable pattern. */
+	drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
+			   DP_TRAINING_PATTERN_DISABLE);
+	mtk_dp_train_set_pattern(mtk_dp, 0);
+
+	return -ETIMEDOUT;
+}
+
+static int mtk_dp_parse_capabilities(struct mtk_dp *mtk_dp)
+{
+	u8 val;
+	ssize_t ret;
+
+	drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap);
+
+	if (drm_dp_tps4_supported(mtk_dp->rx_cap))
+		mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_4;
+	else if (drm_dp_tps3_supported(mtk_dp->rx_cap))
+		mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_3;
+	else
+		mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_2;
+
+	mtk_dp->train_info.sink_ssc = drm_dp_max_downspread(mtk_dp->rx_cap);
+
+	ret = drm_dp_dpcd_readb(&mtk_dp->aux, DP_MSTM_CAP, &val);
+	if (ret < 1) {
+		drm_err(mtk_dp->drm_dev, "Read mstm cap failed\n");
+		return ret == 0 ? -EIO : ret;
+	}
+
+	if (val & DP_MST_CAP) {
+		/* Clear DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 */
+		ret = drm_dp_dpcd_readb(&mtk_dp->aux,
+					DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0,
+					&val);
+		if (ret < 1) {
+			drm_err(mtk_dp->drm_dev, "Read irq vector failed\n");
+			return ret == 0 ? -EIO : ret;
+		}
+
+		if (val)
+			drm_dp_dpcd_writeb(&mtk_dp->aux,
+					   DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0,
+					   val);
+	}
+
+	return 0;
+}
+
+static void mtk_dp_train_change_mode(struct mtk_dp *mtk_dp)
+{
+	phy_reset(mtk_dp->phy);
+	mtk_dp_reset_swing_pre_emphasis(mtk_dp);
+}
+
+static int mtk_dp_training(struct mtk_dp *mtk_dp)
+{
+	int ret;
+	u8 lane_count, link_rate, train_limit, max_link_rate;
+
+	link_rate = min_t(u8, mtk_dp->max_linkrate,
+			  mtk_dp->rx_cap[DP_MAX_LINK_RATE]);
+	max_link_rate = link_rate;
+	lane_count = min_t(u8, mtk_dp->max_lanes,
+			   drm_dp_max_lane_count(mtk_dp->rx_cap));
+
+	/*
+	 * TPS are generated by the hardware pattern generator. From the
+	 * hardware setting we need to disable this scramble setting before
+	 * use the TPS pattern generator.
+	 */
+	mtk_dp_training_set_scramble(mtk_dp, false);
+
+	for (train_limit = 6; train_limit > 0; train_limit--) {
+		mtk_dp_train_change_mode(mtk_dp);
+
+		ret = mtk_dp_train_setting(mtk_dp, link_rate, lane_count);
+		if (ret)
+			return ret;
+
+		ret = mtk_dp_train_cr(mtk_dp, lane_count);
+		if (ret == -ENODEV) {
+			return ret;
+		} else if (ret) {
+			/* reduce link rate */
+			switch (link_rate) {
+			case DP_LINK_BW_1_62:
+				lane_count = lane_count / 2;
+				link_rate = max_link_rate;
+				if (lane_count == 0)
+					return -EIO;
+				break;
+			case DP_LINK_BW_2_7:
+				link_rate = DP_LINK_BW_1_62;
+				break;
+			case DP_LINK_BW_5_4:
+				link_rate = DP_LINK_BW_2_7;
+				break;
+			case DP_LINK_BW_8_1:
+				link_rate = DP_LINK_BW_5_4;
+				break;
+			default:
+				return -EINVAL;
+			};
+			continue;
+		}
+
+		ret = mtk_dp_train_eq(mtk_dp, lane_count);
+		if (ret == -ENODEV) {
+			return ret;
+		} else if (ret) {
+			/* reduce lane count */
+			if (lane_count == 0)
+				return -EIO;
+			lane_count /= 2;
+			continue;
+		}
+
+		/* if we can run to this, training is done. */
+		break;
+	}
+
+	if (train_limit == 0)
+		return -ETIMEDOUT;
+
+	mtk_dp->train_info.link_rate = link_rate;
+	mtk_dp->train_info.lane_count = lane_count;
+
+	/*
+	 * After training done, we need to output normal stream instead of TPS,
+	 * so we need to enable scramble.
+	 */
+	mtk_dp_training_set_scramble(mtk_dp, true);
+	mtk_dp_set_enhanced_frame_mode(mtk_dp);
+
+	return 0;
+}
+
+static void mtk_dp_video_enable(struct mtk_dp *mtk_dp, bool enable)
+{
+	/* the mute sequence is different between enable and disable */
+	if (enable) {
+		mtk_dp_msa_bypass_enable(mtk_dp, false);
+		mtk_dp_pg_enable(mtk_dp, false);
+		mtk_dp_set_tx_out(mtk_dp);
+		mtk_dp_video_mute(mtk_dp, false);
+	} else {
+		mtk_dp_video_mute(mtk_dp, true);
+		mtk_dp_pg_enable(mtk_dp, true);
+		mtk_dp_msa_bypass_enable(mtk_dp, true);
+	}
+}
+
+static int mtk_dp_video_config(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_config_mn_mode(mtk_dp);
+	mtk_dp_set_msa(mtk_dp);
+	mtk_dp_set_color_depth(mtk_dp);
+	return mtk_dp_set_color_format(mtk_dp, mtk_dp->info.format);
+}
+
+static void mtk_dp_init_port(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_set_idle_pattern(mtk_dp, true);
+	mtk_dp_initialize_priv_data(mtk_dp);
+
+	mtk_dp_initialize_settings(mtk_dp);
+	mtk_dp_initialize_aux_settings(mtk_dp);
+	mtk_dp_initialize_digital_settings(mtk_dp);
+
+	mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3690,
+			   RX_REPLY_COMPLETE_MODE_AUX_TX_P0,
+			   RX_REPLY_COMPLETE_MODE_AUX_TX_P0);
+	mtk_dp_initialize_hpd_detect_settings(mtk_dp);
+
+	mtk_dp_digital_sw_reset(mtk_dp);
+}
+
+static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
+{
+	struct mtk_dp *mtk_dp = dev;
+	unsigned long flags;
+	u32 status;
+
+	spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
+	status = mtk_dp->irq_thread_handle;
+	mtk_dp->irq_thread_handle = 0;
+	spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
+
+	if (status & MTK_DP_THREAD_CABLE_STATE_CHG)
+		drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
+
+	if (status & MTK_DP_THREAD_HPD_EVENT)
+		dev_dbg(mtk_dp->dev, "Receive IRQ from sink devices\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mtk_dp_hpd_event(int hpd, void *dev)
+{
+	struct mtk_dp *mtk_dp = dev;
+	bool cable_sta_chg = false;
+	unsigned long flags;
+	u32 irq_status = mtk_dp_swirq_get_clear(mtk_dp) |
+			 mtk_dp_hwirq_get_clear(mtk_dp);
+
+	if (!irq_status)
+		return IRQ_HANDLED;
+
+	spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
+
+	if (irq_status & MTK_DP_HPD_INTERRUPT)
+		mtk_dp->irq_thread_handle |= MTK_DP_THREAD_HPD_EVENT;
+
+	/* Cable state is changed. */
+	if (irq_status != MTK_DP_HPD_INTERRUPT) {
+		mtk_dp->irq_thread_handle |= MTK_DP_THREAD_CABLE_STATE_CHG;
+		cable_sta_chg = true;
+	}
+
+	spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
+
+	if (cable_sta_chg) {
+		if (!!(mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3414) &
+		       HPD_DB_DP_TRANS_P0_MASK))
+			mtk_dp->train_info.cable_plugged_in = true;
+		else
+			mtk_dp->train_info.cable_plugged_in = false;
+	}
+
+	return IRQ_WAKE_THREAD;
+}
+
+static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp,
+			   struct platform_device *pdev)
+{
+	struct device_node *endpoint;
+	struct device *dev = &pdev->dev;
+	int ret;
+	void __iomem *base;
+	u32 linkrate;
+	int len;
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	mtk_dp->regs = devm_regmap_init_mmio(dev, base, &mtk_dp_regmap_config);
+	if (IS_ERR(mtk_dp->regs))
+		return PTR_ERR(mtk_dp->regs);
+
+	endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 1, -1);
+	len = of_property_count_elems_of_size(endpoint,
+					      "data-lanes", sizeof(u32));
+	if (len < 0 || len > 4 || len == 3) {
+		dev_err(dev, "invalid data lane size: %d\n", len);
+		return -EINVAL;
+	}
+
+	mtk_dp->max_lanes = len;
+
+	ret = device_property_read_u32(dev, "max-linkrate-mhz", &linkrate);
+	if (ret) {
+		dev_err(dev, "failed to read max linkrate: %d\n", ret);
+		return ret;
+	}
+
+	mtk_dp->max_linkrate = drm_dp_link_rate_to_bw_code(linkrate * 100);
+
+	return 0;
+}
+
+static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
+				    struct drm_connector *connector)
+{
+	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+	bool enabled = mtk_dp->enabled;
+	struct edid *new_edid = NULL;
+
+	if (!enabled) {
+		drm_bridge_chain_pre_enable(bridge);
+
+		/* power on aux */
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
+				   DP_PWR_STATE_BANDGAP_TPLL_LANE,
+				   DP_PWR_STATE_MASK);
+
+		/* power on panel */
+		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
+		usleep_range(2000, 5000);
+	}
+
+	new_edid = drm_get_edid(connector, &mtk_dp->aux.ddc);
+
+	/*
+	 * Parse capability here to let atomic_get_input_bus_fmts and
+	 * mode_valid use the capability to calculate sink bitrates.
+	 */
+	if (mtk_dp_parse_capabilities(mtk_dp)) {
+		drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
+		new_edid = NULL;
+	}
+
+	if (!enabled) {
+		/* power off panel */
+		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
+		usleep_range(2000, 3000);
+
+		/* power off aux */
+		mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
+				   DP_PWR_STATE_BANDGAP_TPLL,
+				   DP_PWR_STATE_MASK);
+
+		drm_bridge_chain_post_disable(bridge);
+	}
+
+	return new_edid;
+}
+
+static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux,
+				   struct drm_dp_aux_msg *msg)
+{
+	struct mtk_dp *mtk_dp;
+	bool is_read;
+	u8 request;
+	size_t accessed_bytes = 0;
+	int ret;
+
+	mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
+
+	if (!mtk_dp->train_info.cable_plugged_in) {
+		ret = -EAGAIN;
+		goto err;
+	}
+
+	switch (msg->request) {
+	case DP_AUX_I2C_MOT:
+	case DP_AUX_I2C_WRITE:
+	case DP_AUX_NATIVE_WRITE:
+	case DP_AUX_I2C_WRITE_STATUS_UPDATE:
+	case DP_AUX_I2C_WRITE_STATUS_UPDATE | DP_AUX_I2C_MOT:
+		request = msg->request & ~DP_AUX_I2C_WRITE_STATUS_UPDATE;
+		is_read = false;
+		break;
+	case DP_AUX_I2C_READ:
+	case DP_AUX_NATIVE_READ:
+	case DP_AUX_I2C_READ | DP_AUX_I2C_MOT:
+		request = msg->request;
+		is_read = true;
+		break;
+	default:
+		drm_err(mtk_aux->drm_dev, "invalid aux cmd = %d\n",
+			msg->request);
+		ret = -EINVAL;
+		goto err;
+	}
+
+	do {
+		size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES,
+					 msg->size - accessed_bytes);
+
+		ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request,
+					     msg->address + accessed_bytes,
+					     msg->buffer + accessed_bytes,
+					     to_access);
+
+		if (ret) {
+			drm_info(mtk_dp->drm_dev,
+				 "Failed to do AUX transfer: %d\n", ret);
+			goto err;
+		}
+		accessed_bytes += to_access;
+	} while (accessed_bytes < msg->size);
+
+	msg->reply = DP_AUX_NATIVE_REPLY_ACK | DP_AUX_I2C_REPLY_ACK;
+	return msg->size;
+err:
+	msg->reply = DP_AUX_NATIVE_REPLY_NACK | DP_AUX_I2C_REPLY_NACK;
+	return ret;
+}
+
+static int mtk_dp_poweron(struct mtk_dp *mtk_dp)
+{
+	int ret;
+
+	ret = phy_init(mtk_dp->phy);
+	if (ret) {
+		dev_err(mtk_dp->dev, "Failed to initialize phy: %d\n", ret);
+		return ret;
+	}
+
+	mtk_dp_init_port(mtk_dp);
+	mtk_dp_power_enable(mtk_dp);
+
+	return 0;
+}
+
+static void mtk_dp_poweroff(struct mtk_dp *mtk_dp)
+{
+	mtk_dp_power_disable(mtk_dp);
+	phy_exit(mtk_dp->phy);
+}
+
+static int mtk_dp_bridge_attach(struct drm_bridge *bridge,
+				enum drm_bridge_attach_flags flags)
+{
+	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+	int ret;
+
+	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+		dev_err(mtk_dp->dev, "Driver does not provide a connector!");
+		return -EINVAL;
+	}
+
+	mtk_dp->aux.drm_dev = bridge->dev;
+	ret = drm_dp_aux_register(&mtk_dp->aux);
+	if (ret) {
+		dev_err(mtk_dp->dev,
+			"failed to register DP AUX channel: %d\n", ret);
+		return ret;
+	}
+
+	ret = mtk_dp_poweron(mtk_dp);
+	if (ret)
+		goto err_aux_register;
+
+	if (mtk_dp->next_bridge) {
+		ret = drm_bridge_attach(bridge->encoder, mtk_dp->next_bridge,
+					&mtk_dp->bridge, flags);
+		if (ret) {
+			drm_warn(mtk_dp->drm_dev,
+				 "Failed to attach external bridge: %d\n", ret);
+			goto err_bridge_attach;
+		}
+	}
+
+	mtk_dp->drm_dev = bridge->dev;
+
+	mtk_dp_hwirq_enable(mtk_dp, true);
+
+	return 0;
+
+err_bridge_attach:
+	mtk_dp_poweroff(mtk_dp);
+err_aux_register:
+	drm_dp_aux_unregister(&mtk_dp->aux);
+	return ret;
+}
+
+static void mtk_dp_bridge_detach(struct drm_bridge *bridge)
+{
+	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+
+	mtk_dp_hwirq_enable(mtk_dp, false);
+	mtk_dp->drm_dev = NULL;
+	mtk_dp_poweroff(mtk_dp);
+	drm_dp_aux_unregister(&mtk_dp->aux);
+}
+
+static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge,
+					struct drm_bridge_state *old_state)
+{
+	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+	int ret;
+
+	mtk_dp->conn = drm_atomic_get_new_connector_for_encoder(old_state->base.state,
+								bridge->encoder);
+	if (!mtk_dp->conn) {
+		drm_err(mtk_dp->drm_dev,
+			"Can't enable bridge as connector is missing\n");
+		return;
+	}
+
+	/* power on aux */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
+			   DP_PWR_STATE_BANDGAP_TPLL_LANE,
+			   DP_PWR_STATE_MASK);
+
+	if (mtk_dp->train_info.cable_plugged_in) {
+		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
+		usleep_range(2000, 5000);
+	}
+
+	/* Training */
+	ret = mtk_dp_training(mtk_dp);
+	if (ret) {
+		drm_err(mtk_dp->drm_dev, "Training failed, %d\n", ret);
+		goto power_off_aux;
+	}
+
+	ret = mtk_dp_video_config(mtk_dp);
+	if (ret)
+		goto power_off_aux;
+
+	mtk_dp_video_enable(mtk_dp, true);
+
+	mtk_dp->enabled = true;
+
+	return;
+power_off_aux:
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
+			   DP_PWR_STATE_BANDGAP_TPLL,
+			   DP_PWR_STATE_MASK);
+}
+
+static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge,
+					 struct drm_bridge_state *old_state)
+{
+	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+
+	mtk_dp->enabled = false;
+	mtk_dp_video_enable(mtk_dp, false);
+
+	if (mtk_dp->train_info.cable_plugged_in) {
+		drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
+		usleep_range(2000, 3000);
+	}
+
+	/* power off aux */
+	mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
+			   DP_PWR_STATE_BANDGAP_TPLL,
+			   DP_PWR_STATE_MASK);
+
+	/* Ensure the sink is muted */
+	msleep(20);
+}
+
+static enum drm_mode_status
+mtk_dp_bridge_mode_valid(struct drm_bridge *bridge,
+			 const struct drm_display_info *info,
+			 const struct drm_display_mode *mode)
+{
+	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+	u32 bpp = info->color_formats & DRM_COLOR_FORMAT_YCBCR422 ? 16 : 24;
+	u32 rate = min_t(u32, drm_dp_max_link_rate(mtk_dp->rx_cap) *
+			      drm_dp_max_lane_count(mtk_dp->rx_cap),
+			 drm_dp_bw_code_to_link_rate(mtk_dp->max_linkrate) *
+			 mtk_dp->max_lanes);
+
+	if (rate < mode->clock * bpp / 8)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static u32 *mtk_dp_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
+						     struct drm_bridge_state *bridge_state,
+						     struct drm_crtc_state *crtc_state,
+						     struct drm_connector_state *conn_state,
+						     unsigned int *num_output_fmts)
+{
+	u32 *output_fmts;
+
+	*num_output_fmts = 0;
+	output_fmts = kmalloc(sizeof(*output_fmts), GFP_KERNEL);
+	if (!output_fmts)
+		return NULL;
+	*num_output_fmts = 1;
+	output_fmts[0] = MEDIA_BUS_FMT_FIXED;
+	return output_fmts;
+}
+
+static const u32 mt8195_input_fmts[] = {
+	MEDIA_BUS_FMT_RGB888_1X24,
+	MEDIA_BUS_FMT_YUV8_1X24,
+	MEDIA_BUS_FMT_YUYV8_1X16,
+};
+
+static u32 *mtk_dp_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+						    struct drm_bridge_state *bridge_state,
+						    struct drm_crtc_state *crtc_state,
+						    struct drm_connector_state *conn_state,
+						    u32 output_fmt,
+						    unsigned int *num_input_fmts)
+{
+	u32 *input_fmts;
+	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+	struct drm_display_info *display_info =
+		&conn_state->connector->display_info;
+	u32 rate = min_t(u32, drm_dp_max_link_rate(mtk_dp->rx_cap) *
+			      drm_dp_max_lane_count(mtk_dp->rx_cap),
+			 drm_dp_bw_code_to_link_rate(mtk_dp->max_linkrate) *
+			 mtk_dp->max_lanes);
+
+	*num_input_fmts = 0;
+
+	/*
+	 * If the linkrate is smaller than datarate of RGB888, larger than
+	 * datarate of YUV422 and sink device supports YUV422, we output YUV422
+	 * format. Use this condition, we can support more resolution.
+	 */
+	if ((rate < (mode->clock * 24 / 8)) &&
+	    (rate > (mode->clock * 16 / 8)) &&
+	    (display_info->color_formats & DRM_COLOR_FORMAT_YCBCR422)) {
+		input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL);
+		if (!input_fmts)
+			return NULL;
+		*num_input_fmts = 1;
+		input_fmts[0] = MEDIA_BUS_FMT_YUYV8_1X16;
+	} else {
+		input_fmts = kcalloc(ARRAY_SIZE(mt8195_input_fmts),
+				     sizeof(*input_fmts),
+				     GFP_KERNEL);
+		if (!input_fmts)
+			return NULL;
+
+		*num_input_fmts = ARRAY_SIZE(mt8195_input_fmts);
+		memcpy(input_fmts, mt8195_input_fmts, sizeof(mt8195_input_fmts));
+	}
+
+	return input_fmts;
+}
+
+static int mtk_dp_bridge_atomic_check(struct drm_bridge *bridge,
+				      struct drm_bridge_state *bridge_state,
+				      struct drm_crtc_state *crtc_state,
+				      struct drm_connector_state *conn_state)
+{
+	struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
+	struct drm_crtc *crtc = conn_state->crtc;
+	unsigned int input_bus_format;
+
+	input_bus_format = bridge_state->input_bus_cfg.format;
+
+	dev_dbg(mtk_dp->dev, "input format 0x%04x, output format 0x%04x\n",
+		bridge_state->input_bus_cfg.format,
+		 bridge_state->output_bus_cfg.format);
+
+	if (input_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
+		mtk_dp->info.format = DP_PIXELFORMAT_YUV422;
+	else
+		mtk_dp->info.format = DP_PIXELFORMAT_RGB;
+
+	if (!crtc) {
+		drm_err(mtk_dp->drm_dev,
+			"Can't enable bridge as connector state doesn't have a crtc\n");
+		return -EINVAL;
+	}
+
+	drm_display_mode_to_videomode(&crtc_state->adjusted_mode, &mtk_dp->info.vm);
+
+	return 0;
+}
+
+static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
+	.atomic_check = mtk_dp_bridge_atomic_check,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_get_output_bus_fmts = mtk_dp_bridge_atomic_get_output_bus_fmts,
+	.atomic_get_input_bus_fmts = mtk_dp_bridge_atomic_get_input_bus_fmts,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
+	.attach = mtk_dp_bridge_attach,
+	.detach = mtk_dp_bridge_detach,
+	.atomic_enable = mtk_dp_bridge_atomic_enable,
+	.atomic_disable = mtk_dp_bridge_atomic_disable,
+	.mode_valid = mtk_dp_bridge_mode_valid,
+	.get_edid = mtk_dp_get_edid,
+};
+
+static int mtk_dp_probe(struct platform_device *pdev)
+{
+	struct mtk_dp *mtk_dp;
+	struct device *dev = &pdev->dev;
+	int ret, irq_num;
+
+	mtk_dp = devm_kzalloc(dev, sizeof(*mtk_dp), GFP_KERNEL);
+	if (!mtk_dp)
+		return -ENOMEM;
+
+	mtk_dp->dev = dev;
+
+	irq_num = platform_get_irq(pdev, 0);
+	if (irq_num < 0)
+		return dev_err_probe(dev, irq_num,
+				     "failed to request dp irq resource\n");
+
+	mtk_dp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
+	if (IS_ERR(mtk_dp->next_bridge))
+		return dev_err_probe(dev, PTR_ERR(mtk_dp->next_bridge),
+				     "Failed to get bridge\n");
+
+	ret = mtk_dp_dt_parse(mtk_dp, pdev);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to parse dt\n");
+
+	drm_dp_aux_init(&mtk_dp->aux);
+	mtk_dp->aux.name = "aux_mtk_dp";
+	mtk_dp->aux.transfer = mtk_dp_aux_transfer;
+
+	spin_lock_init(&mtk_dp->irq_thread_lock);
+
+	ret = devm_request_threaded_irq(dev, irq_num, mtk_dp_hpd_event,
+					mtk_dp_hpd_event_thread,
+					IRQ_TYPE_LEVEL_HIGH, dev_name(dev),
+					mtk_dp);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "failed to request mediatek dptx irq\n");
+
+	platform_set_drvdata(pdev, mtk_dp);
+
+	mtk_dp->phy_dev = platform_device_register_data(dev, "mediatek-dp-phy",
+							PLATFORM_DEVID_AUTO,
+							&mtk_dp->regs,
+							sizeof(struct regmap *));
+	if (IS_ERR(mtk_dp->phy_dev))
+		return dev_err_probe(dev, PTR_ERR(mtk_dp->phy_dev),
+				     "Failed to create device mediatek-dp-phy\n");
+
+	mtk_dp_get_calibration_data(mtk_dp);
+
+	mtk_dp->phy = devm_phy_get(&mtk_dp->phy_dev->dev, "dp");
+
+	if (IS_ERR(mtk_dp->phy)) {
+		platform_device_unregister(mtk_dp->phy_dev);
+		return dev_err_probe(dev, PTR_ERR(mtk_dp->phy),
+				     "Failed to get phy\n");
+	}
+
+	mtk_dp->bridge.funcs = &mtk_dp_bridge_funcs;
+	mtk_dp->bridge.of_node = dev->of_node;
+
+	mtk_dp->bridge.ops =
+		DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
+	mtk_dp->bridge.type = DRM_MODE_CONNECTOR_eDP;
+
+	drm_bridge_add(&mtk_dp->bridge);
+
+	pm_runtime_enable(dev);
+	pm_runtime_get_sync(dev);
+
+	return 0;
+}
+
+static int mtk_dp_remove(struct platform_device *pdev)
+{
+	struct mtk_dp *mtk_dp = platform_get_drvdata(pdev);
+
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	drm_bridge_remove(&mtk_dp->bridge);
+	platform_device_unregister(mtk_dp->phy_dev);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mtk_dp_suspend(struct device *dev)
+{
+	struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
+
+	mtk_dp_power_disable(mtk_dp);
+	mtk_dp_hwirq_enable(mtk_dp, false);
+	pm_runtime_put_sync(dev);
+
+	return 0;
+}
+
+static int mtk_dp_resume(struct device *dev)
+{
+	struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
+
+	pm_runtime_get_sync(dev);
+	mtk_dp_init_port(mtk_dp);
+	mtk_dp_hwirq_enable(mtk_dp, true);
+	mtk_dp_power_enable(mtk_dp);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mtk_dp_pm_ops, mtk_dp_suspend, mtk_dp_resume);
+
+static const struct of_device_id mtk_dp_of_match[] = {
+	{ .compatible = "mediatek,mt8195-edp-tx" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mtk_dp_of_match);
+
+struct platform_driver mtk_dp_driver = {
+	.probe = mtk_dp_probe,
+	.remove = mtk_dp_remove,
+	.driver = {
+		.name = "mediatek-drm-dp",
+		.of_match_table = mtk_dp_of_match,
+		.pm = &mtk_dp_pm_ops,
+	},
+};
+
+module_platform_driver(mtk_dp_driver);
+
+MODULE_AUTHOR("Jitao Shi <[e-mail]>");
+MODULE_AUTHOR("Markus Schneider-Pargmann <[e-mail]>");
+MODULE_AUTHOR("Bo-Chen Chen <[e-mail]>");
+MODULE_DESCRIPTION("MediaTek DisplayPort Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/mediatek/mtk_dp_reg.h b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
new file mode 100644
index 000000000000..3f01ba44871f
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_dp_reg.h
@@ -0,0 +1,305 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2019-2022 MediaTek Inc.
+ * Copyright (c) 2022 BayLibre
+ */
+#ifndef _MTK_DP_REG_H_
+#define _MTK_DP_REG_H_
+
+#define SEC_OFFSET	0x4000
+
+#define MTK_DP_HPD_DISCONNECT		BIT(1)
+#define MTK_DP_HPD_CONNECT		BIT(2)
+#define MTK_DP_HPD_INTERRUPT		BIT(3)
+
+/* offset: 0x0 */
+#define DP_PHY_GLB_BIAS_GEN_00		0x0
+#define RG_XTP_GLB_BIAS_INTR_CTRL		GENMASK(20, 16)
+#define DP_PHY_GLB_DPAUX_TX		0x8
+#define RG_CKM_PT0_CKTX_IMPSEL			GENMASK(23, 20)
+#define MTK_DP_0034			0x34
+#define DA_XTP_GLB_CKDET_EN_FORCE_VAL		BIT(15)
+#define DA_XTP_GLB_CKDET_EN_FORCE_EN		BIT(14)
+#define DA_CKM_INTCKTX_EN_FORCE_VAL		BIT(13)
+#define DA_CKM_INTCKTX_EN_FORCE_EN		BIT(12)
+#define DA_CKM_CKTX0_EN_FORCE_VAL		BIT(11)
+#define DA_CKM_CKTX0_EN_FORCE_EN		BIT(10)
+#define DA_CKM_XTAL_CK_FORCE_VAL		BIT(9)
+#define DA_CKM_XTAL_CK_FORCE_EN			BIT(8)
+#define DA_CKM_BIAS_LPF_EN_FORCE_VAL		BIT(7)
+#define DA_CKM_BIAS_LPF_EN_FORCE_EN		BIT(6)
+#define DA_CKM_BIAS_EN_FORCE_VAL		BIT(5)
+#define DA_CKM_BIAS_EN_FORCE_EN			BIT(4)
+#define DA_XTP_GLB_AVD10_ON_FORCE_VAL		BIT(3)
+#define DA_XTP_GLB_AVD10_ON_FORCE		BIT(2)
+#define DA_XTP_GLB_LDO_EN_FORCE_VAL		BIT(1)
+#define DA_XTP_GLB_LDO_EN_FORCE_EN		BIT(0)
+#define DP_PHY_LANE_TX_0		0x104
+#define RG_XTP_LN0_TX_IMPSEL_PMOS		GENMASK(15, 12)
+#define RG_XTP_LN0_TX_IMPSEL_NMOS		GENMASK(19, 16)
+#define DP_PHY_LANE_TX_1		0x204
+#define RG_XTP_LN1_TX_IMPSEL_PMOS		GENMASK(15, 12)
+#define RG_XTP_LN1_TX_IMPSEL_NMOS		GENMASK(19, 16)
+#define DP_PHY_LANE_TX_2		0x304
+#define RG_XTP_LN2_TX_IMPSEL_PMOS		GENMASK(15, 12)
+#define RG_XTP_LN2_TX_IMPSEL_NMOS		GENMASK(19, 16)
+#define DP_PHY_LANE_TX_3		0x404
+#define RG_XTP_LN3_TX_IMPSEL_PMOS		GENMASK(15, 12)
+#define RG_XTP_LN3_TX_IMPSEL_NMOS		GENMASK(19, 16)
+#define MTK_DP_1040			0x1040
+#define RG_DPAUX_RX_VALID_DEGLITCH_EN		BIT(2)
+#define RG_XTP_GLB_CKDET_EN			BIT(1)
+#define RG_DPAUX_RX_EN				BIT(0)
+
+/* offset: TOP_OFFSET (0x2000) */
+#define MTK_DP_TOP_PWR_STATE		0x2000
+#define DP_PWR_STATE_MASK			GENMASK(1, 0)
+#define DP_PWR_STATE_BANDGAP			BIT(0)
+#define DP_PWR_STATE_BANDGAP_TPLL		BIT(1)
+#define DP_PWR_STATE_BANDGAP_TPLL_LANE		GENMASK(1, 0)
+#define MTK_DP_TOP_SWING_EMP		0x2004
+#define DP_TX0_VOLT_SWING_MASK			GENMASK(1, 0)
+#define DP_TX0_VOLT_SWING_SHIFT			0
+#define DP_TX0_PRE_EMPH_MASK			GENMASK(3, 2)
+#define DP_TX0_PRE_EMPH_SHIFT			2
+#define DP_TX1_VOLT_SWING_MASK			GENMASK(9, 8)
+#define DP_TX1_VOLT_SWING_SHIFT			8
+#define DP_TX1_PRE_EMPH_MASK			GENMASK(11, 10)
+#define DP_TX2_VOLT_SWING_MASK			GENMASK(17, 16)
+#define DP_TX2_PRE_EMPH_MASK			GENMASK(19, 18)
+#define DP_TX3_VOLT_SWING_MASK			GENMASK(25, 24)
+#define DP_TX3_PRE_EMPH_MASK			GENMASK(27, 26)
+#define MTK_DP_TOP_RESET_AND_PROBE	0x2020
+#define SW_RST_B_PHYD				BIT(4)
+#define MTK_DP_TOP_IRQ_MASK		0x202c
+#define IRQ_MASK_AUX_TOP_IRQ			BIT(2)
+#define MTK_DP_TOP_MEM_PD		0x2038
+#define MEM_ISO_EN				BIT(0)
+#define FUSE_SEL				BIT(2)
+
+/* offset: ENC0_OFFSET (0x3000) */
+#define MTK_DP_ENC0_P0_3000			0x3000
+#define LANE_NUM_DP_ENC0_P0_MASK			GENMASK(1, 0)
+#define VIDEO_MUTE_SW_DP_ENC0_P0			BIT(2)
+#define VIDEO_MUTE_SEL_DP_ENC0_P0			BIT(3)
+#define ENHANCED_FRAME_EN_DP_ENC0_P0			BIT(4)
+#define MTK_DP_ENC0_P0_3004			0x3004
+#define VIDEO_M_CODE_SEL_DP_ENC0_P0_MASK		BIT(8)
+#define DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0		BIT(9)
+#define MTK_DP_ENC0_P0_3010			0x3010
+#define HTOTAL_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
+#define MTK_DP_ENC0_P0_3014			0x3014
+#define VTOTAL_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
+#define MTK_DP_ENC0_P0_3018			0x3018
+#define HSTART_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
+#define MTK_DP_ENC0_P0_301C			0x301c
+#define VSTART_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
+#define MTK_DP_ENC0_P0_3020			0x3020
+#define HWIDTH_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
+#define MTK_DP_ENC0_P0_3024			0x3024
+#define VHEIGHT_SW_DP_ENC0_P0_MASK			GENMASK(15, 0)
+#define MTK_DP_ENC0_P0_3028			0x3028
+#define HSW_SW_DP_ENC0_P0_MASK				GENMASK(14, 0)
+#define HSP_SW_DP_ENC0_P0_MASK				BIT(15)
+#define MTK_DP_ENC0_P0_302C			0x302c
+#define VSW_SW_DP_ENC0_P0_MASK				GENMASK(14, 0)
+#define VSP_SW_DP_ENC0_P0_MASK				BIT(15)
+#define MTK_DP_ENC0_P0_3030			0x3030
+#define HTOTAL_SEL_DP_ENC0_P0				BIT(0)
+#define VTOTAL_SEL_DP_ENC0_P0				BIT(1)
+#define HSTART_SEL_DP_ENC0_P0				BIT(2)
+#define VSTART_SEL_DP_ENC0_P0				BIT(3)
+#define HWIDTH_SEL_DP_ENC0_P0				BIT(4)
+#define VHEIGHT_SEL_DP_ENC0_P0				BIT(5)
+#define HSP_SEL_DP_ENC0_P0				BIT(6)
+#define HSW_SEL_DP_ENC0_P0				BIT(7)
+#define VSP_SEL_DP_ENC0_P0				BIT(8)
+#define VSW_SEL_DP_ENC0_P0				BIT(9)
+#define MTK_DP_ENC0_P0_3034			0x3034
+#define MTK_DP_ENC0_P0_3038			0x3038
+#define VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK		BIT(11)
+#define MTK_DP_ENC0_P0_303C			0x303c
+#define SRAM_START_READ_THRD_DP_ENC0_P0_MASK		GENMASK(5, 0)
+#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_MASK		GENMASK(10, 8)
+#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_16BIT		(0 << 8)
+#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_12BIT		(1 << 8)
+#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_10BIT		(2 << 8)
+#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_8BIT		(3 << 8)
+#define VIDEO_COLOR_DEPTH_DP_ENC0_P0_6BIT		(4 << 8)
+#define PIXEL_ENCODE_FORMAT_DP_ENC0_P0_MASK		GENMASK(14, 12)
+#define PIXEL_ENCODE_FORMAT_DP_ENC0_P0_RGB		(0 << 12)
+#define PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR422		(1 << 12)
+#define PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR420		(2 << 12)
+#define VIDEO_MN_GEN_EN_DP_ENC0_P0			BIT(15)
+#define MTK_DP_ENC0_P0_3040			0x3040
+#define SDP_DOWN_CNT_DP_ENC0_P0_VAL			0x20
+#define SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK		GENMASK(11, 0)
+#define MTK_DP_ENC0_P0_304C			0x304c
+#define VBID_VIDEO_MUTE_DP_ENC0_P0_MASK			BIT(2)
+#define SDP_VSYNC_RISING_MASK_DP_ENC0_P0_MASK		BIT(8)
+#define MTK_DP_ENC0_P0_3064			0x3064
+#define HDE_NUM_LAST_DP_ENC0_P0_MASK			GENMASK(15, 0)
+#define MTK_DP_ENC0_P0_3154			0x3154
+#define PGEN_HTOTAL_DP_ENC0_P0_MASK			GENMASK(13, 0)
+#define MTK_DP_ENC0_P0_3158			0x3158
+#define PGEN_HSYNC_RISING_DP_ENC0_P0_MASK		GENMASK(13, 0)
+#define MTK_DP_ENC0_P0_315C			0x315c
+#define PGEN_HSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK		GENMASK(13, 0)
+#define MTK_DP_ENC0_P0_3160			0x3160
+#define PGEN_HFDE_START_DP_ENC0_P0_MASK			GENMASK(13, 0)
+#define MTK_DP_ENC0_P0_3164			0x3164
+#define PGEN_HFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK		GENMASK(13, 0)
+#define MTK_DP_ENC0_P0_3168			0x3168
+#define PGEN_VTOTAL_DP_ENC0_P0_MASK			GENMASK(12, 0)
+#define MTK_DP_ENC0_P0_316C			0x316c
+#define PGEN_VSYNC_RISING_DP_ENC0_P0_MASK		GENMASK(12, 0)
+#define MTK_DP_ENC0_P0_3170			0x3170
+#define PGEN_VSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK		GENMASK(12, 0)
+#define MTK_DP_ENC0_P0_3174			0x3174
+#define PGEN_VFDE_START_DP_ENC0_P0_MASK			GENMASK(12, 0)
+#define MTK_DP_ENC0_P0_3178			0x3178
+#define PGEN_VFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK		GENMASK(12, 0)
+#define MTK_DP_ENC0_P0_31B0			0x31b0
+#define PGEN_PATTERN_SEL_VAL				4
+#define PGEN_PATTERN_SEL_MASK				GENMASK(6, 4)
+#define MTK_DP_ENC0_P0_31EC			0x31ec
+#define AUDIO_CH_SRC_SEL_DP_ENC0_P0			BIT(4)
+#define ISRC1_HB3_DP_ENC0_P0_MASK			GENMASK(15, 8)
+
+/* offset: ENC1_OFFSET (0x3200) */
+#define MTK_DP_ENC1_P0_3300			0x3300
+#define VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_VAL		2
+#define VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_MASK		GENMASK(9, 8)
+#define MTK_DP_ENC1_P0_3364			0x3364
+#define SDP_DOWN_CNT_IN_HBLANK_DP_ENC1_P0_VAL		0x20
+#define SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK	GENMASK(11, 0)
+#define FIFO_READ_START_POINT_DP_ENC1_P0_VAL		4
+#define FIFO_READ_START_POINT_DP_ENC1_P0_MASK		GENMASK(15, 12)
+#define MTK_DP_ENC1_P0_3368			0x3368
+#define VIDEO_SRAM_FIFO_CNT_RESET_SEL_DP_ENC1_P0	BIT(0)
+#define VIDEO_STABLE_CNT_THRD_DP_ENC1_P0		BIT(4)
+#define SDP_DP13_EN_DP_ENC1_P0				BIT(8)
+#define BS2BS_MODE_DP_ENC1_P0				BIT(12)
+#define BS2BS_MODE_DP_ENC1_P0_MASK			GENMASK(13, 12)
+#define BS2BS_MODE_DP_ENC1_P0_VAL			1
+#define DP_ENC1_P0_3368_VAL				(VIDEO_SRAM_FIFO_CNT_RESET_SEL_DP_ENC1_P0 | \
+							 VIDEO_STABLE_CNT_THRD_DP_ENC1_P0 | \
+							 SDP_DP13_EN_DP_ENC1_P0 | \
+							 BS2BS_MODE_DP_ENC1_P0)
+
+/* offset: TRANS_OFFSET (0x3400) */
+#define MTK_DP_TRANS_P0_3400				0x3400
+#define PATTERN1_EN_DP_TRANS_P0_MASK				BIT(12)
+#define PATTERN2_EN_DP_TRANS_P0_MASK				BIT(13)
+#define PATTERN3_EN_DP_TRANS_P0_MASK				BIT(14)
+#define PATTERN4_EN_DP_TRANS_P0_MASK				BIT(15)
+#define MTK_DP_TRANS_P0_3404				0x3404
+#define DP_SCR_EN_DP_TRANS_P0_MASK				BIT(0)
+#define MTK_DP_TRANS_P0_340C				0x340c
+#define DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0		BIT(13)
+#define MTK_DP_TRANS_P0_3410				0x3410
+#define HPD_DEB_THD_DP_TRANS_P0_MASK				GENMASK(3, 0)
+#define HPD_INT_THD_DP_TRANS_P0_MASK				GENMASK(7, 4)
+#define HPD_INT_THD_DP_TRANS_P0_LOWER_500US			(2 << 4)
+#define HPD_INT_THD_DP_TRANS_P0_UPPER_1100US			(2 << 6)
+#define HPD_DISC_THD_DP_TRANS_P0_MASK				GENMASK(11, 8)
+#define HPD_CONN_THD_DP_TRANS_P0_MASK				GENMASK(15, 12)
+#define MTK_DP_TRANS_P0_3414				0x3414
+#define HPD_DB_DP_TRANS_P0_MASK					BIT(2)
+#define MTK_DP_TRANS_P0_3418				0x3418
+#define IRQ_CLR_DP_TRANS_P0_MASK				GENMASK(3, 0)
+#define IRQ_MASK_DP_TRANS_P0_MASK				GENMASK(7, 4)
+#define IRQ_MASK_DP_TRANS_P0_DISC_IRQ				(BIT(1) << 4)
+#define IRQ_MASK_DP_TRANS_P0_CONN_IRQ				(BIT(2) << 4)
+#define IRQ_MASK_DP_TRANS_P0_INT_IRQ				(BIT(3) << 4)
+#define IRQ_STATUS_DP_TRANS_P0_MASK				GENMASK(15, 12)
+#define MTK_DP_TRANS_P0_342C				0x342c
+#define XTAL_FREQ_DP_TRANS_P0_DEFAULT				(BIT(0) | BIT(3) | BIT(5) | BIT(6))
+#define XTAL_FREQ_DP_TRANS_P0_MASK				GENMASK(7, 0)
+#define MTK_DP_TRANS_P0_3430				0x3430
+#define HPD_INT_THD_ECO_DP_TRANS_P0_MASK			GENMASK(1, 0)
+#define HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT		BIT(1)
+#define MTK_DP_TRANS_P0_34A4				0x34a4
+#define LANE_NUM_DP_TRANS_P0_MASK				GENMASK(3, 2)
+#define MTK_DP_TRANS_P0_3540				0x3540
+#define FEC_EN_DP_TRANS_P0_MASK					BIT(0)
+#define FEC_CLOCK_EN_MODE_DP_TRANS_P0				BIT(3)
+#define MTK_DP_TRANS_P0_3580				0x3580
+#define POST_MISC_DATA_LANE0_OV_DP_TRANS_P0_MASK		BIT(8)
+#define POST_MISC_DATA_LANE1_OV_DP_TRANS_P0_MASK		BIT(9)
+#define POST_MISC_DATA_LANE2_OV_DP_TRANS_P0_MASK		BIT(10)
+#define POST_MISC_DATA_LANE3_OV_DP_TRANS_P0_MASK		BIT(11)
+#define MTK_DP_TRANS_P0_35C8				0x35c8
+#define SW_IRQ_CLR_DP_TRANS_P0_MASK				GENMASK(15, 0)
+#define SW_IRQ_STATUS_DP_TRANS_P0_MASK				GENMASK(15, 0)
+#define MTK_DP_TRANS_P0_35D0				0x35d0
+#define SW_IRQ_FINAL_STATUS_DP_TRANS_P0_MASK			GENMASK(15, 0)
+#define MTK_DP_TRANS_P0_35F0				0x35f0
+#define DP_TRANS_DUMMY_RW_0					BIT(3)
+#define DP_TRANS_DUMMY_RW_0_MASK				GENMASK(3, 2)
+
+/* offset: AUX_OFFSET (0x3600) */
+#define MTK_DP_AUX_P0_360C			0x360c
+#define AUX_TIMEOUT_THR_AUX_TX_P0_MASK			GENMASK(12, 0)
+#define AUX_TIMEOUT_THR_AUX_TX_P0_VAL			0x1595
+#define MTK_DP_AUX_P0_3614			0x3614
+#define AUX_RX_UI_CNT_THR_AUX_TX_P0_MASK		GENMASK(6, 0)
+#define AUX_RX_UI_CNT_THR_AUX_FOR_26M			13
+#define MTK_DP_AUX_P0_3618			0x3618
+#define AUX_RX_FIFO_FULL_AUX_TX_P0_MASK			BIT(9)
+#define AUX_RX_FIFO_WRITE_POINTER_AUX_TX_P0_MASK	GENMASK(3, 0)
+#define MTK_DP_AUX_P0_3620			0x3620
+#define AUX_RD_MODE_AUX_TX_P0_MASK			BIT(9)
+#define AUX_RX_FIFO_READ_PULSE_TX_P0			BIT(8)
+#define AUX_RX_FIFO_READ_DATA_AUX_TX_P0_MASK		GENMASK(7, 0)
+#define MTK_DP_AUX_P0_3624			0x3624
+#define AUX_RX_REPLY_COMMAND_AUX_TX_P0_MASK		GENMASK(3, 0)
+#define MTK_DP_AUX_P0_3628			0x3628
+#define AUX_RX_PHY_STATE_AUX_TX_P0_MASK			GENMASK(9, 0)
+#define AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE		BIT(0)
+#define MTK_DP_AUX_P0_362C			0x362c
+#define AUX_NO_LENGTH_AUX_TX_P0				BIT(0)
+#define AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK		BIT(1)
+#define AUX_RESERVED_RW_0_AUX_TX_P0_MASK		GENMASK(15, 2)
+#define MTK_DP_AUX_P0_3630			0x3630
+#define AUX_TX_REQUEST_READY_AUX_TX_P0			BIT(3)
+#define MTK_DP_AUX_P0_3634			0x3634
+#define AUX_TX_OVER_SAMPLE_RATE_AUX_TX_P0_MASK		GENMASK(15, 8)
+#define AUX_TX_OVER_SAMPLE_RATE_FOR_26M			25
+#define MTK_DP_AUX_P0_3640			0x3640
+#define AUX_RX_AUX_RECV_COMPLETE_IRQ_AUX_TX_P0		BIT(6)
+#define AUX_RX_EDID_RECV_COMPLETE_IRQ_AUX_TX_P0		BIT(5)
+#define AUX_RX_MCCS_RECV_COMPLETE_IRQ_AUX_TX_P0		BIT(4)
+#define AUX_RX_CMD_RECV_IRQ_AUX_TX_P0			BIT(3)
+#define AUX_RX_ADDR_RECV_IRQ_AUX_TX_P0			BIT(2)
+#define AUX_RX_DATA_RECV_IRQ_AUX_TX_P0			BIT(1)
+#define AUX_400US_TIMEOUT_IRQ_AUX_TX_P0			BIT(0)
+#define DP_AUX_P0_3640_VAL				(AUX_400US_TIMEOUT_IRQ_AUX_TX_P0 | \
+							 AUX_RX_DATA_RECV_IRQ_AUX_TX_P0 | \
+							 AUX_RX_ADDR_RECV_IRQ_AUX_TX_P0 | \
+							 AUX_RX_CMD_RECV_IRQ_AUX_TX_P0 | \
+							 AUX_RX_MCCS_RECV_COMPLETE_IRQ_AUX_TX_P0 | \
+							 AUX_RX_EDID_RECV_COMPLETE_IRQ_AUX_TX_P0 | \
+							 AUX_RX_AUX_RECV_COMPLETE_IRQ_AUX_TX_P0)
+#define MTK_DP_AUX_P0_3644			0x3644
+#define MCU_REQUEST_COMMAND_AUX_TX_P0_MASK		GENMASK(3, 0)
+#define MTK_DP_AUX_P0_3648			0x3648
+#define MCU_REQUEST_ADDRESS_LSB_AUX_TX_P0_MASK		GENMASK(15, 0)
+#define MTK_DP_AUX_P0_364C			0x364c
+#define MCU_REQUEST_ADDRESS_MSB_AUX_TX_P0_MASK		GENMASK(3, 0)
+#define MTK_DP_AUX_P0_3650			0x3650
+#define MCU_REQ_DATA_NUM_AUX_TX_P0_MASK			GENMASK(15, 12)
+#define PHY_FIFO_RST_AUX_TX_P0_MASK			BIT(9)
+#define MCU_ACK_TRAN_COMPLETE_AUX_TX_P0			BIT(8)
+#define MTK_DP_AUX_P0_3658			0x3658
+#define AUX_TX_OV_EN_AUX_TX_P0_MASK			BIT(0)
+#define MTK_DP_AUX_P0_3690			0x3690
+#define RX_REPLY_COMPLETE_MODE_AUX_TX_P0		BIT(8)
+#define MTK_DP_AUX_P0_3704			0x3704
+#define AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK	BIT(1)
+#define AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0		BIT(2)
+#define MTK_DP_AUX_P0_3708			0x3708
+#define MTK_DP_AUX_P0_37C8			0x37c8
+#define MTK_ATOP_EN_AUX_TX_P0				BIT(0)
+
+#endif /*_MTK_DP_REG_H_*/