diff mbox series

[v2,2/2] drm: rcar-du: Add RZ/G2L DSI driver

Message ID 20220328065115.11724-1-biju.das.jz@bp.renesas.com (mailing list archive)
State New, archived
Headers show
Series Add RZ/G2L DSI driver | expand

Commit Message

Biju Das March 28, 2022, 6:51 a.m. UTC
This driver supports the MIPI DSI encoder found in the RZ/G2L
SoC. It currently supports DSI mode only.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
v1->v2:
 * Rework based on dt-binding change (DSI + D-PHY) as single block
 * Replaced link_mmio and phy_mmio with mmio in struct rzg2l_mipi_dsi
 * Replaced rzg2l_mipi_phy_write with rzg2l_mipi_dsi_phy_write
   and rzg2l_mipi_dsi_link_write
 * Replaced rzg2l_mipi_phy_read->rzg2l_mipi_dsi_link_read
RFC->v1:
 * Added "depends on ARCH_RENESAS || COMPILE_TEST" on KCONFIG
   and dropped DRM as it is implied by DRM_BRIDGE
 * Used devm_reset_control_get_exclusive() for reset handle
 * Removed bool hsclkmode from struct rzg2l_mipi_dsi
 * Added error check for pm, using pm_runtime_resume_and_get() instead of
   pm_runtime_get_sync()
 * Added check for unsupported formats in rzg2l_mipi_dsi_host_attach()
 * Avoided read-modify-write stopping hsclock
 * Used devm_platform_ioremap_resource for resource allocation
 * Removed unnecessary assert call from probe and remove.
 * wrap the line after the PTR_ERR() in probe()
 * Updated reset failure messages in probe
 * Fixed the typo arstc->prstc
 * Made hex constants to lower case.
RFC:
 * https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220112174612.10773-23-biju.das.jz@bp.renesas.com/
---
 drivers/gpu/drm/rcar-du/Kconfig               |   8 +
 drivers/gpu/drm/rcar-du/Makefile              |   1 +
 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c      | 686 ++++++++++++++++++
 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h | 149 ++++
 4 files changed, 844 insertions(+)
 create mode 100644 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
 create mode 100644 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h

Comments

Laurent Pinchart April 15, 2022, 10:57 a.m. UTC | #1
Hi Biju,

Thank you for the patch.

On Mon, Mar 28, 2022 at 07:51:15AM +0100, Biju Das wrote:
> This driver supports the MIPI DSI encoder found in the RZ/G2L
> SoC. It currently supports DSI mode only.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> ---
> v1->v2:
>  * Rework based on dt-binding change (DSI + D-PHY) as single block
>  * Replaced link_mmio and phy_mmio with mmio in struct rzg2l_mipi_dsi
>  * Replaced rzg2l_mipi_phy_write with rzg2l_mipi_dsi_phy_write
>    and rzg2l_mipi_dsi_link_write
>  * Replaced rzg2l_mipi_phy_read->rzg2l_mipi_dsi_link_read
> RFC->v1:
>  * Added "depends on ARCH_RENESAS || COMPILE_TEST" on KCONFIG
>    and dropped DRM as it is implied by DRM_BRIDGE
>  * Used devm_reset_control_get_exclusive() for reset handle
>  * Removed bool hsclkmode from struct rzg2l_mipi_dsi
>  * Added error check for pm, using pm_runtime_resume_and_get() instead of
>    pm_runtime_get_sync()
>  * Added check for unsupported formats in rzg2l_mipi_dsi_host_attach()
>  * Avoided read-modify-write stopping hsclock
>  * Used devm_platform_ioremap_resource for resource allocation
>  * Removed unnecessary assert call from probe and remove.
>  * wrap the line after the PTR_ERR() in probe()
>  * Updated reset failure messages in probe
>  * Fixed the typo arstc->prstc
>  * Made hex constants to lower case.
> RFC:
>  * https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220112174612.10773-23-biju.das.jz@bp.renesas.com/
> ---
>  drivers/gpu/drm/rcar-du/Kconfig               |   8 +
>  drivers/gpu/drm/rcar-du/Makefile              |   1 +
>  drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c      | 686 ++++++++++++++++++
>  drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h | 149 ++++
>  4 files changed, 844 insertions(+)
>  create mode 100644 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
>  create mode 100644 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
> 
> diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
> index e40fb0c53f9b..83d7d28214a0 100644
> --- a/drivers/gpu/drm/rcar-du/Kconfig
> +++ b/drivers/gpu/drm/rcar-du/Kconfig
> @@ -64,6 +64,14 @@ config DRM_RCAR_MIPI_DSI
>  	help
>  	  Enable support for the R-Car Display Unit embedded MIPI DSI encoders.
>  
> +config DRM_RZG2L_MIPI_DSI
> +	tristate "RZ/G2L MIPI DSI Encoder Support"
> +	depends on DRM_BRIDGE && OF
> +	depends on ARCH_RENESAS || COMPILE_TEST
> +	select DRM_MIPI_DSI
> +	help
> +	  Enable support for the RZ/G2L Display Unit embedded MIPI DSI encoders.
> +
>  config DRM_RCAR_VSP
>  	bool "R-Car DU VSP Compositor Support" if ARM
>  	default y if ARM64
> diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
> index 01ba78e56b53..7fb4f8717fc4 100644
> --- a/drivers/gpu/drm/rcar-du/Makefile
> +++ b/drivers/gpu/drm/rcar-du/Makefile
> @@ -27,6 +27,7 @@ obj-$(CONFIG_DRM_RCAR_LVDS)		+= rcar_lvds.o
>  obj-$(CONFIG_DRM_RCAR_MIPI_DSI)		+= rcar_mipi_dsi.o
>  
>  obj-$(CONFIG_DRM_RZG2L_DU)		+= rzg2l-du-drm.o
> +obj-$(CONFIG_DRM_RZG2L_MIPI_DSI)	+= rzg2l_mipi_dsi.o
>  
>  # 'remote-endpoint' is fixed up at run-time
>  DTC_FLAGS_rcar_du_of_lvds_r8a7790 += -Wno-graph_endpoint
> diff --git a/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
> new file mode 100644
> index 000000000000..3b785041ba5e
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
> @@ -0,0 +1,686 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * RZ/G2L MIPI DSI Encoder Driver
> + *
> + * Copyright (C) 2022 Renesas Electronics Corporation
> + */
> +#include <linux/clk.h>
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/iopoll.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_graph.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/reset.h>
> +#include <linux/slab.h>
> +
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_of.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_probe_helper.h>
> +
> +#include "rzg2l_mipi_dsi_regs.h"
> +
> +struct rzg2l_mipi_dsi {
> +	struct device *dev;
> +	void __iomem *mmio;
> +
> +	struct reset_control *rstc;
> +	struct reset_control *arstc;
> +	struct reset_control *prstc;
> +
> +	struct mipi_dsi_host host;
> +	struct drm_bridge bridge;
> +	struct drm_bridge *next_bridge;
> +
> +	struct clk *vclk;
> +
> +	enum mipi_dsi_pixel_format format;
> +	unsigned int num_data_lanes;
> +	unsigned int lanes;
> +	unsigned long mode_flags;
> +};
> +
> +static inline struct rzg2l_mipi_dsi *
> +bridge_to_rzg2l_mipi_dsi(struct drm_bridge *bridge)
> +{
> +	return container_of(bridge, struct rzg2l_mipi_dsi, bridge);
> +}
> +
> +static inline struct rzg2l_mipi_dsi *
> +host_to_rzg2l_mipi_dsi(struct mipi_dsi_host *host)
> +{
> +	return container_of(host, struct rzg2l_mipi_dsi, host);
> +}
> +
> +static void rzg2l_mipi_dsi_phy_write(void __iomem *mem, u32 reg, u32 data)

You can pass a rzg2l_mipi_dsi pointer to this function instead of the
memory pointer. Same for the two functions below.

> +{
> +	iowrite32(data, mem + reg);
> +}
> +
> +static void rzg2l_mipi_dsi_link_write(void __iomem *mem, u32 reg, u32 data)
> +{
> +	iowrite32(data, mem + LINK_REG_OFFSET + reg);
> +}
> +
> +static u32 rzg2l_mipi_dsi_link_read(void __iomem *mem, u32 reg)
> +{
> +	return ioread32(mem + LINK_REG_OFFSET + reg);
> +}
> +
> +/* -----------------------------------------------------------------------------
> + * Hardware Setup
> + */
> +
> +static int rzg2l_mipi_dsi_startup(struct rzg2l_mipi_dsi *dsi,
> +				  const struct drm_display_mode *mode)
> +{
> +	unsigned long hsfreq;
> +	u32 txsetr;
> +	u32 clstptsetr;
> +	u32 lptrnstsetr;
> +	u8 max_num_lanes;
> +	u32 clkkpt;
> +	u32 clkbfht;
> +	u32 clkstpt;
> +	u32 golpbkt;
> +	unsigned int bpp;
> +	struct {
> +		u32 tclk_miss;
> +		u32 t_init;
> +		u32 tclk_prepare;
> +		u32 tclk_settle;
> +		u32 tclk_trail;
> +		u32 tclk_post;
> +		u32 tclk_pre;
> +		u32 tclk_zero;
> +		u32 tlpx;
> +		u32 ths_prepare;
> +		u32 ths_settle;
> +		u32 ths_exit;
> +		u32 ths_trail;
> +		u32 ths_zero;
> +	} timings;
> +	u32 dphyctrl0;
> +	u32 dphytim0;
> +	u32 dphytim1;
> +	u32 dphytim2;
> +	u32 dphytim3;
> +	int ret;
> +
> +	/* Relationship between hsclk and vclk must follow

	/*
	 * Relationship between hsclk and vclk must follow

> +	 * vclk * bpp = hsclk * 8 * lanes
> +	 * where vclk: video clock (Hz)
> +	 *       bpp: video pixel bit depth
> +	 *       hsclk: DSI HS Byte clock frequency (Hz)
> +	 *       lanes: number of data lanes
> +	 *
> +	 * hsclk(bit) = hsclk(byte) * 8
> +	 */
> +
> +	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
> +	hsfreq = (mode->clock * bpp * 8) / (8 * dsi->lanes);
> +
> +	/* Initializing DPHY before accessing LINK */
> +
> +	/* All DSI global operation timings are set with recommended setting */
> +	if (hsfreq > 250000) {
> +		timings.tclk_miss = 1;
> +		timings.t_init = 79801;
> +		timings.tclk_prepare = 8;
> +		timings.tclk_settle = 9;
> +		timings.tclk_trail = 7;
> +		timings.tclk_post = 35;
> +		timings.tclk_pre = 4;
> +		timings.tclk_zero = 33;
> +		timings.tlpx = 6;
> +		timings.ths_prepare = 9;
> +		timings.ths_settle = 9;
> +		timings.ths_exit = 13;
> +		timings.ths_trail = 9;
> +		timings.ths_zero = 16;
> +	} else {
> +		timings.tclk_miss = 1;
> +		timings.t_init = 79801;
> +		timings.tclk_prepare = 8;
> +		timings.tclk_settle = 9;
> +		timings.tclk_trail = 10;
> +		timings.tclk_post = 94;
> +		timings.tclk_pre = 13;
> +		timings.tclk_zero = 33;
> +		timings.tlpx = 6;
> +		timings.ths_prepare = 12;
> +		timings.ths_settle = 9;
> +		timings.ths_exit = 13;
> +		timings.ths_trail = 17;
> +		timings.ths_zero = 23;
> +	}
> +
> +	ret = reset_control_deassert(dsi->arstc);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = reset_control_deassert(dsi->prstc);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = pm_runtime_resume_and_get(dsi->dev);
> +	if (ret < 0) {
> +		reset_control_assert(dsi->prstc);
> +		reset_control_assert(dsi->arstc);
> +		return ret;
> +	}
> +
> +	clk_set_rate(dsi->vclk, mode->clock * 1000);
> +
> +	dphyctrl0 = DSIDPHYCTRL0_CAL_EN_HSRX_OFS | DSIDPHYCTRL0_CMN_MASTER_EN |
> +		    DSIDPHYCTRL0_RE_VDD_DETVCCQLV18 | DSIDPHYCTRL0_EN_BGR;
> +
> +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYCTRL0, dphyctrl0);
> +	usleep_range(20, 30);
> +
> +	dphyctrl0 |= DSIDPHYCTRL0_EN_LDO1200;
> +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYCTRL0, dphyctrl0);
> +	usleep_range(10, 20);
> +
> +	dphytim0 = DSIDPHYTIM0_TCLK_MISS(timings.tclk_miss) |
> +		   DSIDPHYTIM0_T_INIT(timings.t_init);
> +	dphytim1 = DSIDPHYTIM1_THS_PREPARE(timings.ths_prepare) |
> +		   DSIDPHYTIM1_TCLK_PREPARE(timings.tclk_prepare) |
> +		   DSIDPHYTIM1_THS_SETTLE(timings.ths_settle) |
> +		   DSIDPHYTIM1_TCLK_SETTLE(timings.tclk_settle);
> +	dphytim2 = DSIDPHYTIM2_TCLK_TRAIL(timings.tclk_trail) |
> +		   DSIDPHYTIM2_TCLK_POST(timings.tclk_post) |
> +		   DSIDPHYTIM2_TCLK_PRE(timings.tclk_pre) |
> +		   DSIDPHYTIM2_TCLK_ZERO(timings.tclk_zero);
> +	dphytim3 = DSIDPHYTIM3_TLPX(timings.tlpx) |
> +		   DSIDPHYTIM3_THS_EXIT(timings.ths_exit) |
> +		   DSIDPHYTIM3_THS_TRAIL(timings.ths_trail) |
> +		   DSIDPHYTIM3_THS_ZERO(timings.ths_zero);
> +
> +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM0, dphytim0);
> +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM1, dphytim1);
> +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM2, dphytim2);
> +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM3, dphytim3);
> +
> +	reset_control_deassert(dsi->rstc);
> +	udelay(1);
> +
> +	/* Check number of lanes capability */
> +	max_num_lanes = rzg2l_mipi_dsi_link_read(dsi->mmio, TXSETR) >> 16;
> +	max_num_lanes = (max_num_lanes & 0x3) + 1;
> +	if (max_num_lanes < dsi->lanes) {
> +		dev_err(dsi->dev, "DPHY can not support %d lanes", dsi->lanes);
> +		return -EINVAL;
> +	}
> +
> +	/* Enable Data lanes and Clock lanes */
> +	txsetr = TXSETR_DLEN | TXSETR_NUMLANEUSE(dsi->lanes - 1) | TXSETR_CLEN;
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, TXSETR, txsetr);
> +
> +	/*
> +	 * Global timings characteristic depends on high speed Clock Frequency
> +	 * Currently MIPI DSI-IF just supports maximum FHD@60 with:
> +	 * - videoclock = 148.5 (MHz)
> +	 * - bpp: maximum 24bpp
> +	 * - data lanes: maximum 4 lanes
> +	 * Therefore maximum hsclk will be 891 Mbps.
> +	 */
> +
> +	if (hsfreq > 445500) {
> +		clkkpt = 12;
> +		clkbfht = 15;
> +		clkstpt = 48;
> +		golpbkt = 75;
> +	} else if (hsfreq > 250000) {
> +		clkkpt = 7;
> +		clkbfht = 8;
> +		clkstpt = 27;
> +		golpbkt = 40;
> +	} else {
> +		clkkpt = 8;
> +		clkbfht = 6;
> +		clkstpt = 24;
> +		golpbkt = 29;
> +	}
> +
> +	clstptsetr = CLSTPTSETR_CLKKPT(clkkpt) | CLSTPTSETR_CLKBFHT(clkbfht) |
> +		     CLSTPTSETR_CLKSTPT(clkstpt);
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, CLSTPTSETR, clstptsetr);
> +
> +	lptrnstsetr = LPTRNSTSETR_GOLPBKT(golpbkt);
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, LPTRNSTSETR, lptrnstsetr);
> +
> +	return 0;
> +}
> +
> +static void rzg2l_mipi_dsi_set_display_timing(struct rzg2l_mipi_dsi *dsi,
> +					      const struct drm_display_mode *mode)
> +{
> +	u32 vich1ppsetr;
> +	u32 vich1vssetr;
> +	u32 vich1vpsetr;
> +	u32 vich1hssetr;
> +	u32 vich1hpsetr;
> +	int dsi_format;
> +	u32 delay[2];
> +	u8 index;
> +
> +	/* Configuration for Pixel Packet */
> +	dsi_format = mipi_dsi_pixel_format_to_bpp(dsi->format);
> +	switch (dsi_format) {
> +	case 24:
> +		vich1ppsetr = VICH1PPSETR_DT_RGB24;
> +		break;
> +	case 18:
> +		vich1ppsetr = VICH1PPSETR_DT_RGB18;
> +		break;
> +	}
> +
> +	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
> +		vich1ppsetr |= VICH1PPSETR_TXESYNC_PULSE;
> +
> +	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
> +		vich1ppsetr &= ~VICH1PPSETR_TXESYNC_PULSE;
> +
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1PPSETR, vich1ppsetr);
> +
> +	/* Configuration for Video Parameters */
> +	vich1vssetr = VICH1VSSETR_VACTIVE(mode->vdisplay) |
> +		      VICH1VSSETR_VSA(mode->vsync_end - mode->vsync_start);
> +	vich1vssetr |= (mode->flags & DRM_MODE_FLAG_PVSYNC) ?
> +			VICH1VSSETR_VSPOL_HIGH : VICH1VSSETR_VSPOL_LOW;
> +
> +	vich1vpsetr = VICH1VPSETR_VFP(mode->vsync_start - mode->vdisplay) |
> +		      VICH1VPSETR_VBP(mode->vtotal - mode->vsync_end);
> +
> +	vich1hssetr = VICH1HSSETR_HACTIVE(mode->hdisplay) |
> +		      VICH1HSSETR_HSA(mode->hsync_end - mode->hsync_start);
> +	vich1hssetr |= (mode->flags & DRM_MODE_FLAG_PHSYNC) ?
> +			VICH1HSSETR_HSPOL_HIGH : VICH1HSSETR_HSPOL_LOW;
> +
> +	vich1hpsetr = VICH1HPSETR_HFP(mode->hsync_start - mode->hdisplay) |
> +		      VICH1HPSETR_HBP(mode->htotal - mode->hsync_end);
> +
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1VSSETR, vich1vssetr);
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1VPSETR, vich1vpsetr);
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1HSSETR, vich1hssetr);
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1HPSETR, vich1hpsetr);
> +
> +	/*
> +	 * Configuration for Delay Value
> +	 * Delay value based on 2 ranges of video clock.
> +	 * 74.25MHz is videoclock of HD@60p or FHD@30p
> +	 */
> +
> +	if (mode->clock > 74250) {
> +		delay[0] = 231;
> +		delay[1] = 216;
> +	} else {
> +		delay[0] = 220;
> +		delay[1] = 212;
> +	}
> +
> +	if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
> +		index = 0;
> +	else
> +		index = 1;
> +
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET1R,
> +				  VICH1SET1R_DLY(delay[index]));
> +}
> +
> +static int rzg2l_mipi_dsi_start_hs_clock(struct rzg2l_mipi_dsi *dsi)
> +{
> +	bool hsclk_running_mode;
> +	u32 hsclksetr;
> +	u32 status;
> +	int ret;
> +
> +	hsclk_running_mode = !(dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS);
> +
> +	/* Start HS clock */
> +	hsclksetr = HSCLKSETR_HSCLKRUN_HS | (hsclk_running_mode ?
> +					     HSCLKSETR_HSCLKMODE_CONT :
> +					     HSCLKSETR_HSCLKMODE_NON_CONT);
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, HSCLKSETR, hsclksetr);
> +
> +	if (hsclk_running_mode) {
> +		ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> +					status & PLSR_CLLP2HS,
> +					2000, 20000, false, dsi->mmio, PLSR);
> +		if (ret < 0) {
> +			dev_err(dsi->dev, "failed to start HS clock\n");
> +			return ret;
> +		}
> +	}
> +
> +	dev_dbg(dsi->dev, "Start High Speed Clock with %s clock mode",
> +		hsclk_running_mode ? "continuous" : "non-continuous");
> +
> +	return 0;
> +}
> +
> +static int rzg2l_mipi_dsi_stop_hs_clock(struct rzg2l_mipi_dsi *dsi)
> +{
> +	bool hsclk_mode;
> +	u32 status;
> +	int ret;
> +
> +	hsclk_mode = !(dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS);
> +
> +	/* Stop HS clock */
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, HSCLKSETR,
> +				  hsclk_mode ? HSCLKSETR_HSCLKMODE_CONT :
> +				  HSCLKSETR_HSCLKMODE_NON_CONT);
> +
> +	if (hsclk_mode) {
> +		ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> +					status & PLSR_CLHS2LP,
> +					2000, 20000, false, dsi->mmio, PLSR);
> +		if (ret < 0) {
> +			dev_err(dsi->dev, "failed to stop HS clock\n");
> +			return ret;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static int rzg2l_mipi_dsi_start_video(struct rzg2l_mipi_dsi *dsi)
> +{
> +	u32 vich1set0r;
> +	u32 status;
> +	int ret;
> +
> +	/* Configuration for Blanking sequence and start video input*/
> +	vich1set0r = VICH1SET0R_HFPNOLP | VICH1SET0R_HBPNOLP |
> +		     VICH1SET0R_HSANOLP | VICH1SET0R_VSTART;
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET0R, vich1set0r);
> +
> +	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> +				status & VICH1SR_VIRDY,
> +				2000, 20000, false, dsi->mmio, VICH1SR);
> +	if (ret < 0) {
> +		dev_err(dsi->dev, "Failed to start video signal input\n");
> +		return ret;
> +	}
> +
> +	dev_dbg(dsi->dev, "Start video transferring");

I'm not sure this message is actually useful even for debugging.

> +
> +	return 0;
> +}
> +
> +static int rzg2l_mipi_dsi_stop_video(struct rzg2l_mipi_dsi *dsi)
> +{
> +	u32 status;
> +	int ret;
> +
> +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET0R, VICH1SET0R_VSTPAFT);
> +	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> +				(status & VICH1SR_STOP) && (!(status & VICH1SR_RUNNING)),
> +				2000, 20000, false, dsi->mmio, VICH1SR);
> +	if (ret < 0)
> +		goto err;
> +
> +	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> +				!(status & LINKSR_HSBUSY),
> +				2000, 20000, false, dsi->mmio, LINKSR);
> +	if (ret < 0)
> +		goto err;
> +
> +	return 0;
> +err:
> +	dev_err(dsi->dev, "Failed to stop video signal input\n");
> +	return ret;
> +}
> +
> +/* -----------------------------------------------------------------------------
> + * Bridge
> + */
> +
> +static int rzg2l_mipi_dsi_attach(struct drm_bridge *bridge,
> +				 enum drm_bridge_attach_flags flags)
> +{
> +	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
> +
> +	return drm_bridge_attach(bridge->encoder, dsi->next_bridge, bridge,
> +				 flags);
> +}
> +
> +static void rzg2l_mipi_dsi_atomic_enable(struct drm_bridge *bridge,
> +					 struct drm_bridge_state *old_bridge_state)
> +{
> +	struct drm_atomic_state *state = old_bridge_state->base.state;
> +	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
> +	const struct drm_display_mode *mode;
> +	struct drm_connector *connector;
> +	struct drm_crtc *crtc;
> +	int ret;
> +
> +	connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
> +	crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
> +	mode = &drm_atomic_get_new_crtc_state(state, crtc)->adjusted_mode;
> +
> +	ret = rzg2l_mipi_dsi_startup(dsi, mode);
> +	if (ret < 0)
> +		return;
> +
> +	rzg2l_mipi_dsi_set_display_timing(dsi, mode);
> +
> +	ret = rzg2l_mipi_dsi_start_hs_clock(dsi);
> +	if (ret < 0)
> +		return;
> +
> +	ret = rzg2l_mipi_dsi_start_video(dsi);
> +	if (ret < 0)
> +		return;

I would have expected DSI peripherals to require the use of enable and
pre_enable to split the clock and video enable, but if it works, that's
fine.

> +}
> +
> +static void rzg2l_mipi_dsi_atomic_disable(struct drm_bridge *bridge,
> +					  struct drm_bridge_state *old_bridge_state)
> +{
> +	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
> +
> +	rzg2l_mipi_dsi_stop_video(dsi);
> +	rzg2l_mipi_dsi_stop_hs_clock(dsi);
> +	pm_runtime_put(dsi->dev);
> +	reset_control_assert(dsi->rstc);
> +	reset_control_assert(dsi->arstc);
> +	reset_control_assert(dsi->prstc);
> +}
> +
> +static enum drm_mode_status
> +rzg2l_mipi_dsi_bridge_mode_valid(struct drm_bridge *bridge,
> +				 const struct drm_display_info *info,
> +				 const struct drm_display_mode *mode)
> +{
> +	if (mode->clock > 148500)
> +		return MODE_CLOCK_HIGH;
> +
> +	return MODE_OK;
> +}
> +
> +static const struct drm_bridge_funcs rzg2l_mipi_dsi_bridge_ops = {
> +	.attach = rzg2l_mipi_dsi_attach,
> +	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> +	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> +	.atomic_reset = drm_atomic_helper_bridge_reset,
> +	.atomic_enable = rzg2l_mipi_dsi_atomic_enable,
> +	.atomic_disable = rzg2l_mipi_dsi_atomic_disable,
> +	.mode_valid = rzg2l_mipi_dsi_bridge_mode_valid,
> +};
> +
> +/* -----------------------------------------------------------------------------
> + * Host setting
> + */
> +
> +static int rzg2l_mipi_dsi_host_attach(struct mipi_dsi_host *host,
> +				      struct mipi_dsi_device *device)
> +{
> +	struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host);
> +	int ret;
> +
> +	if (device->lanes > dsi->num_data_lanes)
> +		return -EINVAL;
> +
> +	switch (mipi_dsi_pixel_format_to_bpp(device->format)) {
> +	case 24:
> +	case 18:
> +		break;
> +	default:
> +		dev_warn(dsi->dev, "unsupported format");
> +		return -EINVAL;
> +	}
> +
> +	dsi->lanes = device->lanes;
> +	dsi->format = device->format;
> +	dsi->mode_flags = device->mode_flags;
> +
> +	dsi->next_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node,
> +						  1, 0);
> +	if (IS_ERR(dsi->next_bridge)) {
> +		ret = PTR_ERR(dsi->next_bridge);
> +		dev_err(dsi->dev, "failed to get next bridge: %d\n", ret);
> +		return ret;
> +	}
> +
> +	/* Initialize the DRM bridge. */
> +	dsi->bridge.funcs = &rzg2l_mipi_dsi_bridge_ops;
> +	dsi->bridge.of_node = dsi->dev->of_node;

This can be done at probe time.

> +	drm_bridge_add(&dsi->bridge);
> +
> +	return 0;
> +}
> +
> +static int rzg2l_mipi_dsi_host_detach(struct mipi_dsi_host *host,
> +				      struct mipi_dsi_device *device)
> +{
> +	struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host);
> +
> +	drm_bridge_remove(&dsi->bridge);
> +	return 0;
> +}
> +
> +static const struct mipi_dsi_host_ops rzg2l_mipi_dsi_host_ops = {
> +	.attach = rzg2l_mipi_dsi_host_attach,
> +	.detach = rzg2l_mipi_dsi_host_detach,
> +};
> +
> +/* -----------------------------------------------------------------------------
> + * Probe & Remove
> + */
> +
> +static int rzg2l_mipi_dsi_parse_dt(struct rzg2l_mipi_dsi *dsi)
> +{
> +	struct device_node *ep;
> +	u32 data_lanes[4];
> +	int ret;
> +
> +	ep = of_graph_get_endpoint_by_regs(dsi->dev->of_node, 1, 0);
> +	if (!ep) {
> +		dev_dbg(dsi->dev, "unconnected port@1\n");

Should this be an error message ?

> +		return -ENODEV;
> +	}
> +
> +	ret = of_property_read_variable_u32_array(ep, "data-lanes", data_lanes,
> +						  1, 4);
> +	of_node_put(ep);
> +
> +	if (ret < 0) {
> +		dev_err(dsi->dev, "missing or invalid data-lanes property\n");
> +		return -ENODEV;
> +	}
> +
> +	dsi->num_data_lanes = ret;
> +	return 0;
> +}
> +
> +static int rzg2l_mipi_dsi_probe(struct platform_device *pdev)
> +{
> +	struct rzg2l_mipi_dsi *dsi;
> +	int ret;
> +
> +	dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
> +	if (!dsi)
> +		return -ENOMEM;
> +
> +	platform_set_drvdata(pdev, dsi);
> +	dsi->dev = &pdev->dev;
> +
> +	ret = rzg2l_mipi_dsi_parse_dt(dsi);
> +	if (ret < 0)
> +		return ret;
> +
> +	dsi->mmio = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(dsi->mmio))
> +		return PTR_ERR(dsi->mmio);
> +
> +	dsi->vclk = devm_clk_get(dsi->dev, "vclk");
> +	if (IS_ERR(dsi->vclk))
> +		return PTR_ERR(dsi->vclk);
> +
> +	dsi->rstc = devm_reset_control_get_exclusive(dsi->dev, "rst");
> +	if (IS_ERR(dsi->rstc))
> +		return dev_err_probe(dsi->dev, PTR_ERR(dsi->rstc),
> +				     "failed to get arst\n");
> +
> +	dsi->arstc = devm_reset_control_get_exclusive(dsi->dev, "arst");
> +	if (IS_ERR(dsi->arstc))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(dsi->arstc),
> +				     "failed to get arst\n");
> +
> +	dsi->prstc = devm_reset_control_get_exclusive(dsi->dev, "prst");
> +	if (IS_ERR(dsi->prstc))
> +		return dev_err_probe(dsi->dev, PTR_ERR(dsi->prstc),
> +				     "failed to get prst\n");
> +
> +	pm_runtime_enable(dsi->dev);
> +
> +	/* Init host device */
> +	dsi->host.dev = dsi->dev;
> +	dsi->host.ops = &rzg2l_mipi_dsi_host_ops;
> +	ret = mipi_dsi_host_register(&dsi->host);
> +	if (ret < 0)
> +		goto out_pm_get;
> +
> +	return 0;

Missing blank line.

> +out_pm_get:
> +	pm_runtime_disable(dsi->dev);
> +	return ret;
> +}
> +
> +static int rzg2l_mipi_dsi_remove(struct platform_device *pdev)
> +{
> +	struct rzg2l_mipi_dsi *dsi = platform_get_drvdata(pdev);
> +
> +	mipi_dsi_host_unregister(&dsi->host);
> +	pm_runtime_disable(&pdev->dev);
> +	return 0;
> +}
> +
> +static const struct of_device_id rzg2l_mipi_dsi_of_table[] = {
> +	{ .compatible = "renesas,rzg2l-mipi-dsi" },
> +	{ /* sentinel */ }
> +};

MODULE_DEVICE_TABLE(of, rzg2l_mipi_dsi_of_table);

> +
> +static struct platform_driver rzg2l_mipi_dsi_platform_driver = {
> +	.driver	= {
> +		.name = "rzg2l-mipi-dsi",
> +		.of_match_table = rzg2l_mipi_dsi_of_table,
> +	},
> +	.probe	= rzg2l_mipi_dsi_probe,
> +	.remove	= rzg2l_mipi_dsi_remove,
> +};
> +
> +module_platform_driver(rzg2l_mipi_dsi_platform_driver);
> +
> +MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com");
> +MODULE_DESCRIPTION("Renesas RZ/G2L MIPI DSI Encoder Driver");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
> new file mode 100644
> index 000000000000..40c96330e79a
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
> @@ -0,0 +1,149 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * RZ/G2L MIPI DSI Interface Registers Definitions
> + *
> + * Copyright (C) 2022 Renesas Electronics Corporation
> + */
> +
> +#ifndef __RZG2L_MIPI_DSI_REGS_H__
> +#define __RZG2L_MIPI_DSI_REGS_H__

Please include linux/bits.h here to make this file self-contained.

> +
> +/* DPHY Registers */
> +#define DSIDPHYCTRL0			0x00
> +#define DSIDPHYCTRL0_CAL_EN_HSRX_OFS	BIT(16)
> +#define DSIDPHYCTRL0_CMN_MASTER_EN	BIT(8)
> +#define DSIDPHYCTRL0_RE_VDD_DETVCCQLV18	BIT(2)
> +#define DSIDPHYCTRL0_EN_LDO1200		BIT(1)
> +#define DSIDPHYCTRL0_EN_BGR		BIT(0)
> +
> +#define DSIDPHYTIM0			0x04
> +#define DSIDPHYTIM0_TCLK_MISS(x)	((x) << 24)
> +#define DSIDPHYTIM0_T_INIT(x)		((x) << 0)
> +
> +#define DSIDPHYTIM1			0x08
> +#define DSIDPHYTIM1_THS_PREPARE(x)	((x) << 24)
> +#define DSIDPHYTIM1_TCLK_PREPARE(x)	((x) << 16)
> +#define DSIDPHYTIM1_THS_SETTLE(x)	((x) << 8)
> +#define DSIDPHYTIM1_TCLK_SETTLE(x)	((x) << 0)
> +
> +#define DSIDPHYTIM2			0x0c
> +#define DSIDPHYTIM2_TCLK_TRAIL(x)	((x) << 24)
> +#define DSIDPHYTIM2_TCLK_POST(x)	((x) << 16)
> +#define DSIDPHYTIM2_TCLK_PRE(x)		((x) << 8)
> +#define DSIDPHYTIM2_TCLK_ZERO(x)	((x) << 0)
> +
> +#define DSIDPHYTIM3			0x10
> +#define DSIDPHYTIM3_TLPX(x)		((x) << 24)
> +#define DSIDPHYTIM3_THS_EXIT(x)		((x) << 16)
> +#define DSIDPHYTIM3_THS_TRAIL(x)	((x) << 8)
> +#define DSIDPHYTIM3_THS_ZERO(x)		((x) << 0)
> +
> +/* --------------------------------------------------------*/
> +/* Link Registers */
> +#define LINK_REG_OFFSET			0x10000
> +
> +/* Link Status Register */
> +#define LINKSR				0x10
> +#define LINKSR_LPBUSY			BIT(13)
> +#define LINKSR_HSBUSY			BIT(12)
> +#define LINKSR_VICHRUN1			BIT(8)
> +#define LINKSR_SQCHRUN1			BIT(4)
> +#define LINKSR_SQCHRUN0			BIT(0)
> +
> +/* Tx Set Register */
> +#define TXSETR				0x100
> +#define TXSETR_NUMLANECAP		(0x3 << 16)
> +#define TXSETR_DLEN			BIT(9)
> +#define TXSETR_CLEN			BIT(8)
> +#define TXSETR_NUMLANEUSE(x)		(((x) & 0x3) << 0)
> +
> +/* HS Clock Set Register */
> +#define HSCLKSETR			0x104
> +#define HSCLKSETR_HSCLKMODE_CONT	BIT(1)
> +#define HSCLKSETR_HSCLKMODE_NON_CONT	(0 << 1)

I would either drop the second macro, or write

#define HSCLKSETR_HSCLKMODE_CONT	(1 << 1)
#define HSCLKSETR_HSCLKMODE_NON_CONT	(0 << 1)

if you don't want to handle it as a bit flag but a 1-bit field with a
value. Same in multiple locations below.

> +#define HSCLKSETR_HSCLKRUN_HS		BIT(0)
> +#define HSCLKSETR_HSCLKRUN_LP		(0 << 0)
> +
> +/* Reset Control Register */
> +#define RSTCR				0x110
> +#define RSTCR_SWRST			BIT(0)
> +#define RSTCR_FCETXSTP			BIT(16)
> +
> +/* Reset Status Register */
> +#define RSTSR				0x114
> +#define RSTSR_DL0DIR			BIT(15)
> +#define RSTSR_DLSTPST			(0xf << 8)
> +#define RSTSR_SWRSTV1			BIT(4)
> +#define RSTSR_SWRSTIB			BIT(3)
> +#define RSTSR_SWRSTAPB			BIT(2)
> +#define RSTSR_SWRSTLP			BIT(1)
> +#define RSTSR_SWRSTHS			BIT(0)
> +
> +/* Clock Lane Stop Time Set Register */
> +#define CLSTPTSETR			0x314
> +#define CLSTPTSETR_CLKKPT(x)		((x) << 24)
> +#define CLSTPTSETR_CLKBFHT(x)		((x) << 16)
> +#define CLSTPTSETR_CLKSTPT(x)		((x) << 2)
> +
> +/* LP Transition Time Set Register */
> +#define LPTRNSTSETR			0x318
> +#define LPTRNSTSETR_GOLPBKT(x)		((x) << 0)
> +
> +/* Physical Lane Status Register */
> +#define PLSR				0x320
> +#define PLSR_CLHS2LP			BIT(27)
> +#define PLSR_CLLP2HS			BIT(26)
> +
> +/* Video-Input Channel 1 Set 0 Register */
> +#define VICH1SET0R			0x400
> +#define VICH1SET0R_VSEN			BIT(12)
> +#define VICH1SET0R_HFPNOLP		BIT(10)
> +#define VICH1SET0R_HBPNOLP		BIT(9)
> +#define VICH1SET0R_HSANOLP		BIT(8)
> +#define VICH1SET0R_VSTPAFT		BIT(1)
> +#define VICH1SET0R_VSTART		BIT(0)
> +
> +/* Video-Input Channel 1 Set 1 Register */
> +#define VICH1SET1R			0x404
> +#define VICH1SET1R_DLY(x)		(((x) & 0xfff) << 2)
> +
> +/* Video-Input Channel 1 Status Register */
> +#define VICH1SR				0x410
> +#define VICH1SR_VIRDY			BIT(3)
> +#define VICH1SR_RUNNING			BIT(2)
> +#define VICH1SR_STOP			BIT(1)
> +#define VICH1SR_START			BIT(0)
> +
> +/* Video-Input Channel 1 Pixel Packet Set Register */
> +#define VICH1PPSETR			0x420
> +#define VICH1PPSETR_DT_RGB18		(0x1e << 16)
> +#define VICH1PPSETR_DT_RGB18_LS		(0x2e << 16)
> +#define VICH1PPSETR_DT_RGB24		(0x3e << 16)
> +#define VICH1PPSETR_TXESYNC_PULSE	BIT(15)
> +#define VICH1PPSETR_VC(x)		((x) << 22)
> +
> +/* Video-Input Channel 1 Vertical Size Set Register */
> +#define VICH1VSSETR			0x428
> +#define VICH1VSSETR_VACTIVE(x)		(((x) & 0x7fff) << 16)
> +#define VICH1VSSETR_VSPOL_LOW		BIT(15)
> +#define VICH1VSSETR_VSPOL_HIGH		(0 << 15)
> +#define VICH1VSSETR_VSA(x)		(((x) & 0xfff) << 0)
> +
> +/* Video-Input Channel 1 Vertical Porch Set Register */
> +#define VICH1VPSETR			0x42C

This is the only address written as an uppercase hex value.

> +#define VICH1VPSETR_VFP(x)		(((x) & 0x1fff) << 16)
> +#define VICH1VPSETR_VBP(x)		(((x) & 0x1fff) << 0)
> +
> +/* Video-Input Channel 1 Horizontal Size Set Register */
> +#define VICH1HSSETR			0x430
> +#define VICH1HSSETR_HACTIVE(x)		(((x) & 0x7fff) << 16)
> +#define VICH1HSSETR_HSPOL_LOW		BIT(15)
> +#define VICH1HSSETR_HSPOL_HIGH		(0 << 15)
> +#define VICH1HSSETR_HSA(x)		(((x) & 0xfff) << 0)
> +
> +/* Video-Input Channel 1 Horizontal Porch Set Register */
> +#define VICH1HPSETR			0x434
> +#define VICH1HPSETR_HFP(x)		(((x) & 0x1fff) << 16)
> +#define VICH1HPSETR_HBP(x)		(((x) & 0x1fff) << 0)
> +
> +#endif /* __RZG2L_MIPI_DSI_REGS_H__ */
Biju Das April 18, 2022, 8:02 p.m. UTC | #2
Hi Laurent,

Thanks for the feedback.

> Subject: Re: [PATCH v2 2/2] drm: rcar-du: Add RZ/G2L DSI driver
> 
> Hi Biju,
> 
> Thank you for the patch.
> 
> On Mon, Mar 28, 2022 at 07:51:15AM +0100, Biju Das wrote:
> > This driver supports the MIPI DSI encoder found in the RZ/G2L SoC. It
> > currently supports DSI mode only.
> >
> > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> > ---
> > v1->v2:
> >  * Rework based on dt-binding change (DSI + D-PHY) as single block
> >  * Replaced link_mmio and phy_mmio with mmio in struct rzg2l_mipi_dsi
> >  * Replaced rzg2l_mipi_phy_write with rzg2l_mipi_dsi_phy_write
> >    and rzg2l_mipi_dsi_link_write
> >  * Replaced rzg2l_mipi_phy_read->rzg2l_mipi_dsi_link_read
> > RFC->v1:
> >  * Added "depends on ARCH_RENESAS || COMPILE_TEST" on KCONFIG
> >    and dropped DRM as it is implied by DRM_BRIDGE
> >  * Used devm_reset_control_get_exclusive() for reset handle
> >  * Removed bool hsclkmode from struct rzg2l_mipi_dsi
> >  * Added error check for pm, using pm_runtime_resume_and_get() instead of
> >    pm_runtime_get_sync()
> >  * Added check for unsupported formats in rzg2l_mipi_dsi_host_attach()
> >  * Avoided read-modify-write stopping hsclock
> >  * Used devm_platform_ioremap_resource for resource allocation
> >  * Removed unnecessary assert call from probe and remove.
> >  * wrap the line after the PTR_ERR() in probe()
> >  * Updated reset failure messages in probe
> >  * Fixed the typo arstc->prstc
> >  * Made hex constants to lower case.
> > RFC:
> >  *
> > ---
> >  drivers/gpu/drm/rcar-du/Kconfig               |   8 +
> >  drivers/gpu/drm/rcar-du/Makefile              |   1 +
> >  drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c      | 686 ++++++++++++++++++
> >  drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h | 149 ++++
> >  4 files changed, 844 insertions(+)
> >  create mode 100644 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
> >  create mode 100644 drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
> >
> > diff --git a/drivers/gpu/drm/rcar-du/Kconfig
> > b/drivers/gpu/drm/rcar-du/Kconfig index e40fb0c53f9b..83d7d28214a0
> > 100644
> > --- a/drivers/gpu/drm/rcar-du/Kconfig
> > +++ b/drivers/gpu/drm/rcar-du/Kconfig
> > @@ -64,6 +64,14 @@ config DRM_RCAR_MIPI_DSI
> >  	help
> >  	  Enable support for the R-Car Display Unit embedded MIPI DSI
> encoders.
> >
> > +config DRM_RZG2L_MIPI_DSI
> > +	tristate "RZ/G2L MIPI DSI Encoder Support"
> > +	depends on DRM_BRIDGE && OF
> > +	depends on ARCH_RENESAS || COMPILE_TEST
> > +	select DRM_MIPI_DSI
> > +	help
> > +	  Enable support for the RZ/G2L Display Unit embedded MIPI DSI
> encoders.
> > +
> >  config DRM_RCAR_VSP
> >  	bool "R-Car DU VSP Compositor Support" if ARM
> >  	default y if ARM64
> > diff --git a/drivers/gpu/drm/rcar-du/Makefile
> > b/drivers/gpu/drm/rcar-du/Makefile
> > index 01ba78e56b53..7fb4f8717fc4 100644
> > --- a/drivers/gpu/drm/rcar-du/Makefile
> > +++ b/drivers/gpu/drm/rcar-du/Makefile
> > @@ -27,6 +27,7 @@ obj-$(CONFIG_DRM_RCAR_LVDS)		+= rcar_lvds.o
> >  obj-$(CONFIG_DRM_RCAR_MIPI_DSI)		+= rcar_mipi_dsi.o
> >
> >  obj-$(CONFIG_DRM_RZG2L_DU)		+= rzg2l-du-drm.o
> > +obj-$(CONFIG_DRM_RZG2L_MIPI_DSI)	+= rzg2l_mipi_dsi.o
> >
> >  # 'remote-endpoint' is fixed up at run-time
> >  DTC_FLAGS_rcar_du_of_lvds_r8a7790 += -Wno-graph_endpoint diff --git
> > a/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
> > b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
> > new file mode 100644
> > index 000000000000..3b785041ba5e
> > --- /dev/null
> > +++ b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
> > @@ -0,0 +1,686 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * RZ/G2L MIPI DSI Encoder Driver
> > + *
> > + * Copyright (C) 2022 Renesas Electronics Corporation  */ #include
> > +<linux/clk.h> #include <linux/delay.h> #include <linux/io.h> #include
> > +<linux/iopoll.h> #include <linux/module.h> #include <linux/of.h>
> > +#include <linux/of_device.h> #include <linux/of_graph.h> #include
> > +<linux/platform_device.h> #include <linux/pm_runtime.h> #include
> > +<linux/reset.h> #include <linux/slab.h>
> > +
> > +#include <drm/drm_atomic.h>
> > +#include <drm/drm_atomic_helper.h>
> > +#include <drm/drm_bridge.h>
> > +#include <drm/drm_mipi_dsi.h>
> > +#include <drm/drm_of.h>
> > +#include <drm/drm_panel.h>
> > +#include <drm/drm_probe_helper.h>
> > +
> > +#include "rzg2l_mipi_dsi_regs.h"
> > +
> > +struct rzg2l_mipi_dsi {
> > +	struct device *dev;
> > +	void __iomem *mmio;
> > +
> > +	struct reset_control *rstc;
> > +	struct reset_control *arstc;
> > +	struct reset_control *prstc;
> > +
> > +	struct mipi_dsi_host host;
> > +	struct drm_bridge bridge;
> > +	struct drm_bridge *next_bridge;
> > +
> > +	struct clk *vclk;
> > +
> > +	enum mipi_dsi_pixel_format format;
> > +	unsigned int num_data_lanes;
> > +	unsigned int lanes;
> > +	unsigned long mode_flags;
> > +};
> > +
> > +static inline struct rzg2l_mipi_dsi * bridge_to_rzg2l_mipi_dsi(struct
> > +drm_bridge *bridge) {
> > +	return container_of(bridge, struct rzg2l_mipi_dsi, bridge); }
> > +
> > +static inline struct rzg2l_mipi_dsi * host_to_rzg2l_mipi_dsi(struct
> > +mipi_dsi_host *host) {
> > +	return container_of(host, struct rzg2l_mipi_dsi, host); }
> > +
> > +static void rzg2l_mipi_dsi_phy_write(void __iomem *mem, u32 reg, u32
> > +data)
> 
> You can pass a rzg2l_mipi_dsi pointer to this function instead of the
> memory pointer. Same for the two functions below.

OK, Agreed.

> 
> > +{
> > +	iowrite32(data, mem + reg);
> > +}
> > +
> > +static void rzg2l_mipi_dsi_link_write(void __iomem *mem, u32 reg, u32
> > +data) {
> > +	iowrite32(data, mem + LINK_REG_OFFSET + reg); }
> > +
> > +static u32 rzg2l_mipi_dsi_link_read(void __iomem *mem, u32 reg) {
> > +	return ioread32(mem + LINK_REG_OFFSET + reg); }
> > +
> > +/*
> > +---------------------------------------------------------------------
> > +--------
> > + * Hardware Setup
> > + */
> > +
> > +static int rzg2l_mipi_dsi_startup(struct rzg2l_mipi_dsi *dsi,
> > +				  const struct drm_display_mode *mode) {
> > +	unsigned long hsfreq;
> > +	u32 txsetr;
> > +	u32 clstptsetr;
> > +	u32 lptrnstsetr;
> > +	u8 max_num_lanes;
> > +	u32 clkkpt;
> > +	u32 clkbfht;
> > +	u32 clkstpt;
> > +	u32 golpbkt;
> > +	unsigned int bpp;
> > +	struct {
> > +		u32 tclk_miss;
> > +		u32 t_init;
> > +		u32 tclk_prepare;
> > +		u32 tclk_settle;
> > +		u32 tclk_trail;
> > +		u32 tclk_post;
> > +		u32 tclk_pre;
> > +		u32 tclk_zero;
> > +		u32 tlpx;
> > +		u32 ths_prepare;
> > +		u32 ths_settle;
> > +		u32 ths_exit;
> > +		u32 ths_trail;
> > +		u32 ths_zero;
> > +	} timings;
> > +	u32 dphyctrl0;
> > +	u32 dphytim0;
> > +	u32 dphytim1;
> > +	u32 dphytim2;
> > +	u32 dphytim3;
> > +	int ret;
> > +
> > +	/* Relationship between hsclk and vclk must follow
> 
> 	/*
> 	 * Relationship between hsclk and vclk must follow

OK.

> 
> > +	 * vclk * bpp = hsclk * 8 * lanes
> > +	 * where vclk: video clock (Hz)
> > +	 *       bpp: video pixel bit depth
> > +	 *       hsclk: DSI HS Byte clock frequency (Hz)
> > +	 *       lanes: number of data lanes
> > +	 *
> > +	 * hsclk(bit) = hsclk(byte) * 8
> > +	 */
> > +
> > +	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
> > +	hsfreq = (mode->clock * bpp * 8) / (8 * dsi->lanes);
> > +
> > +	/* Initializing DPHY before accessing LINK */
> > +
> > +	/* All DSI global operation timings are set with recommended setting
> */
> > +	if (hsfreq > 250000) {
> > +		timings.tclk_miss = 1;
> > +		timings.t_init = 79801;
> > +		timings.tclk_prepare = 8;
> > +		timings.tclk_settle = 9;
> > +		timings.tclk_trail = 7;
> > +		timings.tclk_post = 35;
> > +		timings.tclk_pre = 4;
> > +		timings.tclk_zero = 33;
> > +		timings.tlpx = 6;
> > +		timings.ths_prepare = 9;
> > +		timings.ths_settle = 9;
> > +		timings.ths_exit = 13;
> > +		timings.ths_trail = 9;
> > +		timings.ths_zero = 16;
> > +	} else {
> > +		timings.tclk_miss = 1;
> > +		timings.t_init = 79801;
> > +		timings.tclk_prepare = 8;
> > +		timings.tclk_settle = 9;
> > +		timings.tclk_trail = 10;
> > +		timings.tclk_post = 94;
> > +		timings.tclk_pre = 13;
> > +		timings.tclk_zero = 33;
> > +		timings.tlpx = 6;
> > +		timings.ths_prepare = 12;
> > +		timings.ths_settle = 9;
> > +		timings.ths_exit = 13;
> > +		timings.ths_trail = 17;
> > +		timings.ths_zero = 23;
> > +	}
> > +
> > +	ret = reset_control_deassert(dsi->arstc);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	ret = reset_control_deassert(dsi->prstc);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	ret = pm_runtime_resume_and_get(dsi->dev);
> > +	if (ret < 0) {
> > +		reset_control_assert(dsi->prstc);
> > +		reset_control_assert(dsi->arstc);
> > +		return ret;
> > +	}
> > +
> > +	clk_set_rate(dsi->vclk, mode->clock * 1000);
> > +
> > +	dphyctrl0 = DSIDPHYCTRL0_CAL_EN_HSRX_OFS |
> DSIDPHYCTRL0_CMN_MASTER_EN |
> > +		    DSIDPHYCTRL0_RE_VDD_DETVCCQLV18 | DSIDPHYCTRL0_EN_BGR;
> > +
> > +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYCTRL0, dphyctrl0);
> > +	usleep_range(20, 30);
> > +
> > +	dphyctrl0 |= DSIDPHYCTRL0_EN_LDO1200;
> > +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYCTRL0, dphyctrl0);
> > +	usleep_range(10, 20);
> > +
> > +	dphytim0 = DSIDPHYTIM0_TCLK_MISS(timings.tclk_miss) |
> > +		   DSIDPHYTIM0_T_INIT(timings.t_init);
> > +	dphytim1 = DSIDPHYTIM1_THS_PREPARE(timings.ths_prepare) |
> > +		   DSIDPHYTIM1_TCLK_PREPARE(timings.tclk_prepare) |
> > +		   DSIDPHYTIM1_THS_SETTLE(timings.ths_settle) |
> > +		   DSIDPHYTIM1_TCLK_SETTLE(timings.tclk_settle);
> > +	dphytim2 = DSIDPHYTIM2_TCLK_TRAIL(timings.tclk_trail) |
> > +		   DSIDPHYTIM2_TCLK_POST(timings.tclk_post) |
> > +		   DSIDPHYTIM2_TCLK_PRE(timings.tclk_pre) |
> > +		   DSIDPHYTIM2_TCLK_ZERO(timings.tclk_zero);
> > +	dphytim3 = DSIDPHYTIM3_TLPX(timings.tlpx) |
> > +		   DSIDPHYTIM3_THS_EXIT(timings.ths_exit) |
> > +		   DSIDPHYTIM3_THS_TRAIL(timings.ths_trail) |
> > +		   DSIDPHYTIM3_THS_ZERO(timings.ths_zero);
> > +
> > +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM0, dphytim0);
> > +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM1, dphytim1);
> > +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM2, dphytim2);
> > +	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM3, dphytim3);
> > +
> > +	reset_control_deassert(dsi->rstc);
> > +	udelay(1);
> > +
> > +	/* Check number of lanes capability */
> > +	max_num_lanes = rzg2l_mipi_dsi_link_read(dsi->mmio, TXSETR) >> 16;
> > +	max_num_lanes = (max_num_lanes & 0x3) + 1;
> > +	if (max_num_lanes < dsi->lanes) {
> > +		dev_err(dsi->dev, "DPHY can not support %d lanes", dsi-
> >lanes);
> > +		return -EINVAL;
> > +	}
> > +
> > +	/* Enable Data lanes and Clock lanes */
> > +	txsetr = TXSETR_DLEN | TXSETR_NUMLANEUSE(dsi->lanes - 1) |
> TXSETR_CLEN;
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, TXSETR, txsetr);
> > +
> > +	/*
> > +	 * Global timings characteristic depends on high speed Clock
> Frequency
> > +	 * Currently MIPI DSI-IF just supports maximum FHD@60 with:
> > +	 * - videoclock = 148.5 (MHz)
> > +	 * - bpp: maximum 24bpp
> > +	 * - data lanes: maximum 4 lanes
> > +	 * Therefore maximum hsclk will be 891 Mbps.
> > +	 */
> > +
> > +	if (hsfreq > 445500) {
> > +		clkkpt = 12;
> > +		clkbfht = 15;
> > +		clkstpt = 48;
> > +		golpbkt = 75;
> > +	} else if (hsfreq > 250000) {
> > +		clkkpt = 7;
> > +		clkbfht = 8;
> > +		clkstpt = 27;
> > +		golpbkt = 40;
> > +	} else {
> > +		clkkpt = 8;
> > +		clkbfht = 6;
> > +		clkstpt = 24;
> > +		golpbkt = 29;
> > +	}
> > +
> > +	clstptsetr = CLSTPTSETR_CLKKPT(clkkpt) | CLSTPTSETR_CLKBFHT(clkbfht)
> |
> > +		     CLSTPTSETR_CLKSTPT(clkstpt);
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, CLSTPTSETR, clstptsetr);
> > +
> > +	lptrnstsetr = LPTRNSTSETR_GOLPBKT(golpbkt);
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, LPTRNSTSETR, lptrnstsetr);
> > +
> > +	return 0;
> > +}
> > +
> > +static void rzg2l_mipi_dsi_set_display_timing(struct rzg2l_mipi_dsi
> *dsi,
> > +					      const struct drm_display_mode *mode) {
> > +	u32 vich1ppsetr;
> > +	u32 vich1vssetr;
> > +	u32 vich1vpsetr;
> > +	u32 vich1hssetr;
> > +	u32 vich1hpsetr;
> > +	int dsi_format;
> > +	u32 delay[2];
> > +	u8 index;
> > +
> > +	/* Configuration for Pixel Packet */
> > +	dsi_format = mipi_dsi_pixel_format_to_bpp(dsi->format);
> > +	switch (dsi_format) {
> > +	case 24:
> > +		vich1ppsetr = VICH1PPSETR_DT_RGB24;
> > +		break;
> > +	case 18:
> > +		vich1ppsetr = VICH1PPSETR_DT_RGB18;
> > +		break;
> > +	}
> > +
> > +	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
> > +		vich1ppsetr |= VICH1PPSETR_TXESYNC_PULSE;
> > +
> > +	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
> > +		vich1ppsetr &= ~VICH1PPSETR_TXESYNC_PULSE;
> > +
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1PPSETR, vich1ppsetr);
> > +
> > +	/* Configuration for Video Parameters */
> > +	vich1vssetr = VICH1VSSETR_VACTIVE(mode->vdisplay) |
> > +		      VICH1VSSETR_VSA(mode->vsync_end - mode->vsync_start);
> > +	vich1vssetr |= (mode->flags & DRM_MODE_FLAG_PVSYNC) ?
> > +			VICH1VSSETR_VSPOL_HIGH : VICH1VSSETR_VSPOL_LOW;
> > +
> > +	vich1vpsetr = VICH1VPSETR_VFP(mode->vsync_start - mode->vdisplay) |
> > +		      VICH1VPSETR_VBP(mode->vtotal - mode->vsync_end);
> > +
> > +	vich1hssetr = VICH1HSSETR_HACTIVE(mode->hdisplay) |
> > +		      VICH1HSSETR_HSA(mode->hsync_end - mode->hsync_start);
> > +	vich1hssetr |= (mode->flags & DRM_MODE_FLAG_PHSYNC) ?
> > +			VICH1HSSETR_HSPOL_HIGH : VICH1HSSETR_HSPOL_LOW;
> > +
> > +	vich1hpsetr = VICH1HPSETR_HFP(mode->hsync_start - mode->hdisplay) |
> > +		      VICH1HPSETR_HBP(mode->htotal - mode->hsync_end);
> > +
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1VSSETR, vich1vssetr);
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1VPSETR, vich1vpsetr);
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1HSSETR, vich1hssetr);
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1HPSETR, vich1hpsetr);
> > +
> > +	/*
> > +	 * Configuration for Delay Value
> > +	 * Delay value based on 2 ranges of video clock.
> > +	 * 74.25MHz is videoclock of HD@60p or FHD@30p
> > +	 */
> > +
> > +	if (mode->clock > 74250) {
> > +		delay[0] = 231;
> > +		delay[1] = 216;
> > +	} else {
> > +		delay[0] = 220;
> > +		delay[1] = 212;
> > +	}
> > +
> > +	if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
> > +		index = 0;
> > +	else
> > +		index = 1;
> > +
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET1R,
> > +				  VICH1SET1R_DLY(delay[index]));
> > +}
> > +
> > +static int rzg2l_mipi_dsi_start_hs_clock(struct rzg2l_mipi_dsi *dsi)
> > +{
> > +	bool hsclk_running_mode;
> > +	u32 hsclksetr;
> > +	u32 status;
> > +	int ret;
> > +
> > +	hsclk_running_mode = !(dsi->mode_flags &
> > +MIPI_DSI_CLOCK_NON_CONTINUOUS);
> > +
> > +	/* Start HS clock */
> > +	hsclksetr = HSCLKSETR_HSCLKRUN_HS | (hsclk_running_mode ?
> > +					     HSCLKSETR_HSCLKMODE_CONT :
> > +					     HSCLKSETR_HSCLKMODE_NON_CONT);
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, HSCLKSETR, hsclksetr);
> > +
> > +	if (hsclk_running_mode) {
> > +		ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> > +					status & PLSR_CLLP2HS,
> > +					2000, 20000, false, dsi->mmio, PLSR);
> > +		if (ret < 0) {
> > +			dev_err(dsi->dev, "failed to start HS clock\n");
> > +			return ret;
> > +		}
> > +	}
> > +
> > +	dev_dbg(dsi->dev, "Start High Speed Clock with %s clock mode",
> > +		hsclk_running_mode ? "continuous" : "non-continuous");
> > +
> > +	return 0;
> > +}
> > +
> > +static int rzg2l_mipi_dsi_stop_hs_clock(struct rzg2l_mipi_dsi *dsi) {
> > +	bool hsclk_mode;
> > +	u32 status;
> > +	int ret;
> > +
> > +	hsclk_mode = !(dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS);
> > +
> > +	/* Stop HS clock */
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, HSCLKSETR,
> > +				  hsclk_mode ? HSCLKSETR_HSCLKMODE_CONT :
> > +				  HSCLKSETR_HSCLKMODE_NON_CONT);
> > +
> > +	if (hsclk_mode) {
> > +		ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> > +					status & PLSR_CLHS2LP,
> > +					2000, 20000, false, dsi->mmio, PLSR);
> > +		if (ret < 0) {
> > +			dev_err(dsi->dev, "failed to stop HS clock\n");
> > +			return ret;
> > +		}
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +static int rzg2l_mipi_dsi_start_video(struct rzg2l_mipi_dsi *dsi) {
> > +	u32 vich1set0r;
> > +	u32 status;
> > +	int ret;
> > +
> > +	/* Configuration for Blanking sequence and start video input*/
> > +	vich1set0r = VICH1SET0R_HFPNOLP | VICH1SET0R_HBPNOLP |
> > +		     VICH1SET0R_HSANOLP | VICH1SET0R_VSTART;
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET0R, vich1set0r);
> > +
> > +	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> > +				status & VICH1SR_VIRDY,
> > +				2000, 20000, false, dsi->mmio, VICH1SR);
> > +	if (ret < 0) {
> > +		dev_err(dsi->dev, "Failed to start video signal input\n");
> > +		return ret;
> > +	}
> > +
> > +	dev_dbg(dsi->dev, "Start video transferring");
> 
> I'm not sure this message is actually useful even for debugging.

OK, Will remove this.

> 
> > +
> > +	return 0;
> > +}
> > +
> > +static int rzg2l_mipi_dsi_stop_video(struct rzg2l_mipi_dsi *dsi) {
> > +	u32 status;
> > +	int ret;
> > +
> > +	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET0R,
> VICH1SET0R_VSTPAFT);
> > +	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> > +				(status & VICH1SR_STOP) && (!(status &
> VICH1SR_RUNNING)),
> > +				2000, 20000, false, dsi->mmio, VICH1SR);
> > +	if (ret < 0)
> > +		goto err;
> > +
> > +	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
> > +				!(status & LINKSR_HSBUSY),
> > +				2000, 20000, false, dsi->mmio, LINKSR);
> > +	if (ret < 0)
> > +		goto err;
> > +
> > +	return 0;
> > +err:
> > +	dev_err(dsi->dev, "Failed to stop video signal input\n");
> > +	return ret;
> > +}
> > +
> > +/*
> > +---------------------------------------------------------------------
> > +--------
> > + * Bridge
> > + */
> > +
> > +static int rzg2l_mipi_dsi_attach(struct drm_bridge *bridge,
> > +				 enum drm_bridge_attach_flags flags) {
> > +	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
> > +
> > +	return drm_bridge_attach(bridge->encoder, dsi->next_bridge, bridge,
> > +				 flags);
> > +}
> > +
> > +static void rzg2l_mipi_dsi_atomic_enable(struct drm_bridge *bridge,
> > +					 struct drm_bridge_state *old_bridge_state)
> {
> > +	struct drm_atomic_state *state = old_bridge_state->base.state;
> > +	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
> > +	const struct drm_display_mode *mode;
> > +	struct drm_connector *connector;
> > +	struct drm_crtc *crtc;
> > +	int ret;
> > +
> > +	connector = drm_atomic_get_new_connector_for_encoder(state, bridge-
> >encoder);
> > +	crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
> > +	mode = &drm_atomic_get_new_crtc_state(state, crtc)->adjusted_mode;
> > +
> > +	ret = rzg2l_mipi_dsi_startup(dsi, mode);
> > +	if (ret < 0)
> > +		return;
> > +
> > +	rzg2l_mipi_dsi_set_display_timing(dsi, mode);
> > +
> > +	ret = rzg2l_mipi_dsi_start_hs_clock(dsi);
> > +	if (ret < 0)
> > +		return;
> > +
> > +	ret = rzg2l_mipi_dsi_start_video(dsi);
> > +	if (ret < 0)
> > +		return;
> 
> I would have expected DSI peripherals to require the use of enable and
> pre_enable to split the clock and video enable, but if it works, that's
> fine.

Yes, it works fine.

> 
> > +}
> > +
> > +static void rzg2l_mipi_dsi_atomic_disable(struct drm_bridge *bridge,
> > +					  struct drm_bridge_state *old_bridge_state)
> {
> > +	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
> > +
> > +	rzg2l_mipi_dsi_stop_video(dsi);
> > +	rzg2l_mipi_dsi_stop_hs_clock(dsi);
> > +	pm_runtime_put(dsi->dev);
> > +	reset_control_assert(dsi->rstc);
> > +	reset_control_assert(dsi->arstc);
> > +	reset_control_assert(dsi->prstc);
> > +}
> > +
> > +static enum drm_mode_status
> > +rzg2l_mipi_dsi_bridge_mode_valid(struct drm_bridge *bridge,
> > +				 const struct drm_display_info *info,
> > +				 const struct drm_display_mode *mode) {
> > +	if (mode->clock > 148500)
> > +		return MODE_CLOCK_HIGH;
> > +
> > +	return MODE_OK;
> > +}
> > +
> > +static const struct drm_bridge_funcs rzg2l_mipi_dsi_bridge_ops = {
> > +	.attach = rzg2l_mipi_dsi_attach,
> > +	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> > +	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> > +	.atomic_reset = drm_atomic_helper_bridge_reset,
> > +	.atomic_enable = rzg2l_mipi_dsi_atomic_enable,
> > +	.atomic_disable = rzg2l_mipi_dsi_atomic_disable,
> > +	.mode_valid = rzg2l_mipi_dsi_bridge_mode_valid, };
> > +
> > +/*
> > +---------------------------------------------------------------------
> > +--------
> > + * Host setting
> > + */
> > +
> > +static int rzg2l_mipi_dsi_host_attach(struct mipi_dsi_host *host,
> > +				      struct mipi_dsi_device *device) {
> > +	struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host);
> > +	int ret;
> > +
> > +	if (device->lanes > dsi->num_data_lanes)
> > +		return -EINVAL;
> > +
> > +	switch (mipi_dsi_pixel_format_to_bpp(device->format)) {
> > +	case 24:
> > +	case 18:
> > +		break;
> > +	default:
> > +		dev_warn(dsi->dev, "unsupported format");
> > +		return -EINVAL;
> > +	}
> > +
> > +	dsi->lanes = device->lanes;
> > +	dsi->format = device->format;
> > +	dsi->mode_flags = device->mode_flags;
> > +
> > +	dsi->next_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev-
> >of_node,
> > +						  1, 0);
> > +	if (IS_ERR(dsi->next_bridge)) {
> > +		ret = PTR_ERR(dsi->next_bridge);
> > +		dev_err(dsi->dev, "failed to get next bridge: %d\n", ret);
> > +		return ret;
> > +	}
> > +
> > +	/* Initialize the DRM bridge. */
> > +	dsi->bridge.funcs = &rzg2l_mipi_dsi_bridge_ops;
> > +	dsi->bridge.of_node = dsi->dev->of_node;
> 
> This can be done at probe time.
OK.

> 
> > +	drm_bridge_add(&dsi->bridge);
> > +
> > +	return 0;
> > +}
> > +
> > +static int rzg2l_mipi_dsi_host_detach(struct mipi_dsi_host *host,
> > +				      struct mipi_dsi_device *device) {
> > +	struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host);
> > +
> > +	drm_bridge_remove(&dsi->bridge);
> > +	return 0;
> > +}
> > +
> > +static const struct mipi_dsi_host_ops rzg2l_mipi_dsi_host_ops = {
> > +	.attach = rzg2l_mipi_dsi_host_attach,
> > +	.detach = rzg2l_mipi_dsi_host_detach, };
> > +
> > +/*
> > +---------------------------------------------------------------------
> > +--------
> > + * Probe & Remove
> > + */
> > +
> > +static int rzg2l_mipi_dsi_parse_dt(struct rzg2l_mipi_dsi *dsi) {
> > +	struct device_node *ep;
> > +	u32 data_lanes[4];
> > +	int ret;
> > +
> > +	ep = of_graph_get_endpoint_by_regs(dsi->dev->of_node, 1, 0);
> > +	if (!ep) {
> > +		dev_dbg(dsi->dev, "unconnected port@1\n");
> 
> Should this be an error message ?

Will change it to error message.

> 
> > +		return -ENODEV;
> > +	}
> > +
> > +	ret = of_property_read_variable_u32_array(ep, "data-lanes",
> data_lanes,
> > +						  1, 4);
> > +	of_node_put(ep);
> > +
> > +	if (ret < 0) {
> > +		dev_err(dsi->dev, "missing or invalid data-lanes property\n");
> > +		return -ENODEV;
> > +	}
> > +
> > +	dsi->num_data_lanes = ret;
> > +	return 0;
> > +}
> > +
> > +static int rzg2l_mipi_dsi_probe(struct platform_device *pdev) {
> > +	struct rzg2l_mipi_dsi *dsi;
> > +	int ret;
> > +
> > +	dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
> > +	if (!dsi)
> > +		return -ENOMEM;
> > +
> > +	platform_set_drvdata(pdev, dsi);
> > +	dsi->dev = &pdev->dev;
> > +
> > +	ret = rzg2l_mipi_dsi_parse_dt(dsi);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	dsi->mmio = devm_platform_ioremap_resource(pdev, 0);
> > +	if (IS_ERR(dsi->mmio))
> > +		return PTR_ERR(dsi->mmio);
> > +
> > +	dsi->vclk = devm_clk_get(dsi->dev, "vclk");
> > +	if (IS_ERR(dsi->vclk))
> > +		return PTR_ERR(dsi->vclk);
> > +
> > +	dsi->rstc = devm_reset_control_get_exclusive(dsi->dev, "rst");
> > +	if (IS_ERR(dsi->rstc))
> > +		return dev_err_probe(dsi->dev, PTR_ERR(dsi->rstc),
> > +				     "failed to get arst\n");
> > +
> > +	dsi->arstc = devm_reset_control_get_exclusive(dsi->dev, "arst");
> > +	if (IS_ERR(dsi->arstc))
> > +		return dev_err_probe(&pdev->dev, PTR_ERR(dsi->arstc),
> > +				     "failed to get arst\n");
> > +
> > +	dsi->prstc = devm_reset_control_get_exclusive(dsi->dev, "prst");
> > +	if (IS_ERR(dsi->prstc))
> > +		return dev_err_probe(dsi->dev, PTR_ERR(dsi->prstc),
> > +				     "failed to get prst\n");
> > +
> > +	pm_runtime_enable(dsi->dev);
> > +
> > +	/* Init host device */
> > +	dsi->host.dev = dsi->dev;
> > +	dsi->host.ops = &rzg2l_mipi_dsi_host_ops;
> > +	ret = mipi_dsi_host_register(&dsi->host);
> > +	if (ret < 0)
> > +		goto out_pm_get;
> > +
> > +	return 0;
> 
> Missing blank line.

OK.

> 
> > +out_pm_get:
> > +	pm_runtime_disable(dsi->dev);
> > +	return ret;
> > +}
> > +
> > +static int rzg2l_mipi_dsi_remove(struct platform_device *pdev) {
> > +	struct rzg2l_mipi_dsi *dsi = platform_get_drvdata(pdev);
> > +
> > +	mipi_dsi_host_unregister(&dsi->host);
> > +	pm_runtime_disable(&pdev->dev);
> > +	return 0;
> > +}
> > +
> > +static const struct of_device_id rzg2l_mipi_dsi_of_table[] = {
> > +	{ .compatible = "renesas,rzg2l-mipi-dsi" },
> > +	{ /* sentinel */ }
> > +};
> 
> MODULE_DEVICE_TABLE(of, rzg2l_mipi_dsi_of_table);
> 
> > +
> > +static struct platform_driver rzg2l_mipi_dsi_platform_driver = {
> > +	.driver	= {
> > +		.name = "rzg2l-mipi-dsi",
> > +		.of_match_table = rzg2l_mipi_dsi_of_table,
> > +	},
> > +	.probe	= rzg2l_mipi_dsi_probe,
> > +	.remove	= rzg2l_mipi_dsi_remove,
> > +};
> > +
> > +module_platform_driver(rzg2l_mipi_dsi_platform_driver);
> > +
> > +MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com");
> > +MODULE_DESCRIPTION("Renesas RZ/G2L MIPI DSI Encoder Driver");
> > +MODULE_LICENSE("GPL");
> > diff --git a/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
> > b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
> > new file mode 100644
> > index 000000000000..40c96330e79a
> > --- /dev/null
> > +++ b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
> > @@ -0,0 +1,149 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * RZ/G2L MIPI DSI Interface Registers Definitions
> > + *
> > + * Copyright (C) 2022 Renesas Electronics Corporation  */
> > +
> > +#ifndef __RZG2L_MIPI_DSI_REGS_H__
> > +#define __RZG2L_MIPI_DSI_REGS_H__
> 
> Please include linux/bits.h here to make this file self-contained.
OK.

> 
> > +
> > +/* DPHY Registers */
> > +#define DSIDPHYCTRL0			0x00
> > +#define DSIDPHYCTRL0_CAL_EN_HSRX_OFS	BIT(16)
> > +#define DSIDPHYCTRL0_CMN_MASTER_EN	BIT(8)
> > +#define DSIDPHYCTRL0_RE_VDD_DETVCCQLV18	BIT(2)
> > +#define DSIDPHYCTRL0_EN_LDO1200		BIT(1)
> > +#define DSIDPHYCTRL0_EN_BGR		BIT(0)
> > +
> > +#define DSIDPHYTIM0			0x04
> > +#define DSIDPHYTIM0_TCLK_MISS(x)	((x) << 24)
> > +#define DSIDPHYTIM0_T_INIT(x)		((x) << 0)
> > +
> > +#define DSIDPHYTIM1			0x08
> > +#define DSIDPHYTIM1_THS_PREPARE(x)	((x) << 24)
> > +#define DSIDPHYTIM1_TCLK_PREPARE(x)	((x) << 16)
> > +#define DSIDPHYTIM1_THS_SETTLE(x)	((x) << 8)
> > +#define DSIDPHYTIM1_TCLK_SETTLE(x)	((x) << 0)
> > +
> > +#define DSIDPHYTIM2			0x0c
> > +#define DSIDPHYTIM2_TCLK_TRAIL(x)	((x) << 24)
> > +#define DSIDPHYTIM2_TCLK_POST(x)	((x) << 16)
> > +#define DSIDPHYTIM2_TCLK_PRE(x)		((x) << 8)
> > +#define DSIDPHYTIM2_TCLK_ZERO(x)	((x) << 0)
> > +
> > +#define DSIDPHYTIM3			0x10
> > +#define DSIDPHYTIM3_TLPX(x)		((x) << 24)
> > +#define DSIDPHYTIM3_THS_EXIT(x)		((x) << 16)
> > +#define DSIDPHYTIM3_THS_TRAIL(x)	((x) << 8)
> > +#define DSIDPHYTIM3_THS_ZERO(x)		((x) << 0)
> > +
> > +/* --------------------------------------------------------*/
> > +/* Link Registers */
> > +#define LINK_REG_OFFSET			0x10000
> > +
> > +/* Link Status Register */
> > +#define LINKSR				0x10
> > +#define LINKSR_LPBUSY			BIT(13)
> > +#define LINKSR_HSBUSY			BIT(12)
> > +#define LINKSR_VICHRUN1			BIT(8)
> > +#define LINKSR_SQCHRUN1			BIT(4)
> > +#define LINKSR_SQCHRUN0			BIT(0)
> > +
> > +/* Tx Set Register */
> > +#define TXSETR				0x100
> > +#define TXSETR_NUMLANECAP		(0x3 << 16)
> > +#define TXSETR_DLEN			BIT(9)
> > +#define TXSETR_CLEN			BIT(8)
> > +#define TXSETR_NUMLANEUSE(x)		(((x) & 0x3) << 0)
> > +
> > +/* HS Clock Set Register */
> > +#define HSCLKSETR			0x104
> > +#define HSCLKSETR_HSCLKMODE_CONT	BIT(1)
> > +#define HSCLKSETR_HSCLKMODE_NON_CONT	(0 << 1)
> 
> I would either drop the second macro, or write

Agreed.

> 
> #define HSCLKSETR_HSCLKMODE_CONT	(1 << 1)
> #define HSCLKSETR_HSCLKMODE_NON_CONT	(0 << 1)
> 
> if you don't want to handle it as a bit flag but a 1-bit field with a
> value. Same in multiple locations below.

Agreed.

> 
> > +#define HSCLKSETR_HSCLKRUN_HS		BIT(0)
> > +#define HSCLKSETR_HSCLKRUN_LP		(0 << 0)
> > +
> > +/* Reset Control Register */
> > +#define RSTCR				0x110
> > +#define RSTCR_SWRST			BIT(0)
> > +#define RSTCR_FCETXSTP			BIT(16)
> > +
> > +/* Reset Status Register */
> > +#define RSTSR				0x114
> > +#define RSTSR_DL0DIR			BIT(15)
> > +#define RSTSR_DLSTPST			(0xf << 8)
> > +#define RSTSR_SWRSTV1			BIT(4)
> > +#define RSTSR_SWRSTIB			BIT(3)
> > +#define RSTSR_SWRSTAPB			BIT(2)
> > +#define RSTSR_SWRSTLP			BIT(1)
> > +#define RSTSR_SWRSTHS			BIT(0)
> > +
> > +/* Clock Lane Stop Time Set Register */
> > +#define CLSTPTSETR			0x314
> > +#define CLSTPTSETR_CLKKPT(x)		((x) << 24)
> > +#define CLSTPTSETR_CLKBFHT(x)		((x) << 16)
> > +#define CLSTPTSETR_CLKSTPT(x)		((x) << 2)
> > +
> > +/* LP Transition Time Set Register */
> > +#define LPTRNSTSETR			0x318
> > +#define LPTRNSTSETR_GOLPBKT(x)		((x) << 0)
> > +
> > +/* Physical Lane Status Register */
> > +#define PLSR				0x320
> > +#define PLSR_CLHS2LP			BIT(27)
> > +#define PLSR_CLLP2HS			BIT(26)
> > +
> > +/* Video-Input Channel 1 Set 0 Register */
> > +#define VICH1SET0R			0x400
> > +#define VICH1SET0R_VSEN			BIT(12)
> > +#define VICH1SET0R_HFPNOLP		BIT(10)
> > +#define VICH1SET0R_HBPNOLP		BIT(9)
> > +#define VICH1SET0R_HSANOLP		BIT(8)
> > +#define VICH1SET0R_VSTPAFT		BIT(1)
> > +#define VICH1SET0R_VSTART		BIT(0)
> > +
> > +/* Video-Input Channel 1 Set 1 Register */
> > +#define VICH1SET1R			0x404
> > +#define VICH1SET1R_DLY(x)		(((x) & 0xfff) << 2)
> > +
> > +/* Video-Input Channel 1 Status Register */
> > +#define VICH1SR				0x410
> > +#define VICH1SR_VIRDY			BIT(3)
> > +#define VICH1SR_RUNNING			BIT(2)
> > +#define VICH1SR_STOP			BIT(1)
> > +#define VICH1SR_START			BIT(0)
> > +
> > +/* Video-Input Channel 1 Pixel Packet Set Register */
> > +#define VICH1PPSETR			0x420
> > +#define VICH1PPSETR_DT_RGB18		(0x1e << 16)
> > +#define VICH1PPSETR_DT_RGB18_LS		(0x2e << 16)
> > +#define VICH1PPSETR_DT_RGB24		(0x3e << 16)
> > +#define VICH1PPSETR_TXESYNC_PULSE	BIT(15)
> > +#define VICH1PPSETR_VC(x)		((x) << 22)
> > +
> > +/* Video-Input Channel 1 Vertical Size Set Register */
> > +#define VICH1VSSETR			0x428
> > +#define VICH1VSSETR_VACTIVE(x)		(((x) & 0x7fff) << 16)
> > +#define VICH1VSSETR_VSPOL_LOW		BIT(15)
> > +#define VICH1VSSETR_VSPOL_HIGH		(0 << 15)
> > +#define VICH1VSSETR_VSA(x)		(((x) & 0xfff) << 0)
> > +
> > +/* Video-Input Channel 1 Vertical Porch Set Register */
> > +#define VICH1VPSETR			0x42C
> 
> This is the only address written as an uppercase hex value.

OK, will fix this.

Cheers,
Biju

> 
> > +#define VICH1VPSETR_VFP(x)		(((x) & 0x1fff) << 16)
> > +#define VICH1VPSETR_VBP(x)		(((x) & 0x1fff) << 0)
> > +
> > +/* Video-Input Channel 1 Horizontal Size Set Register */
> > +#define VICH1HSSETR			0x430
> > +#define VICH1HSSETR_HACTIVE(x)		(((x) & 0x7fff) << 16)
> > +#define VICH1HSSETR_HSPOL_LOW		BIT(15)
> > +#define VICH1HSSETR_HSPOL_HIGH		(0 << 15)
> > +#define VICH1HSSETR_HSA(x)		(((x) & 0xfff) << 0)
> > +
> > +/* Video-Input Channel 1 Horizontal Porch Set Register */
> > +#define VICH1HPSETR			0x434
> > +#define VICH1HPSETR_HFP(x)		(((x) & 0x1fff) << 16)
> > +#define VICH1HPSETR_HBP(x)		(((x) & 0x1fff) << 0)
> > +
> > +#endif /* __RZG2L_MIPI_DSI_REGS_H__ */
> 
> --
> Regards,
> 
> Laurent Pinchart
diff mbox series

Patch

diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index e40fb0c53f9b..83d7d28214a0 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -64,6 +64,14 @@  config DRM_RCAR_MIPI_DSI
 	help
 	  Enable support for the R-Car Display Unit embedded MIPI DSI encoders.
 
+config DRM_RZG2L_MIPI_DSI
+	tristate "RZ/G2L MIPI DSI Encoder Support"
+	depends on DRM_BRIDGE && OF
+	depends on ARCH_RENESAS || COMPILE_TEST
+	select DRM_MIPI_DSI
+	help
+	  Enable support for the RZ/G2L Display Unit embedded MIPI DSI encoders.
+
 config DRM_RCAR_VSP
 	bool "R-Car DU VSP Compositor Support" if ARM
 	default y if ARM64
diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile
index 01ba78e56b53..7fb4f8717fc4 100644
--- a/drivers/gpu/drm/rcar-du/Makefile
+++ b/drivers/gpu/drm/rcar-du/Makefile
@@ -27,6 +27,7 @@  obj-$(CONFIG_DRM_RCAR_LVDS)		+= rcar_lvds.o
 obj-$(CONFIG_DRM_RCAR_MIPI_DSI)		+= rcar_mipi_dsi.o
 
 obj-$(CONFIG_DRM_RZG2L_DU)		+= rzg2l-du-drm.o
+obj-$(CONFIG_DRM_RZG2L_MIPI_DSI)	+= rzg2l_mipi_dsi.o
 
 # 'remote-endpoint' is fixed up at run-time
 DTC_FLAGS_rcar_du_of_lvds_r8a7790 += -Wno-graph_endpoint
diff --git a/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
new file mode 100644
index 000000000000..3b785041ba5e
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi.c
@@ -0,0 +1,686 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * RZ/G2L MIPI DSI Encoder Driver
+ *
+ * Copyright (C) 2022 Renesas Electronics Corporation
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+#include "rzg2l_mipi_dsi_regs.h"
+
+struct rzg2l_mipi_dsi {
+	struct device *dev;
+	void __iomem *mmio;
+
+	struct reset_control *rstc;
+	struct reset_control *arstc;
+	struct reset_control *prstc;
+
+	struct mipi_dsi_host host;
+	struct drm_bridge bridge;
+	struct drm_bridge *next_bridge;
+
+	struct clk *vclk;
+
+	enum mipi_dsi_pixel_format format;
+	unsigned int num_data_lanes;
+	unsigned int lanes;
+	unsigned long mode_flags;
+};
+
+static inline struct rzg2l_mipi_dsi *
+bridge_to_rzg2l_mipi_dsi(struct drm_bridge *bridge)
+{
+	return container_of(bridge, struct rzg2l_mipi_dsi, bridge);
+}
+
+static inline struct rzg2l_mipi_dsi *
+host_to_rzg2l_mipi_dsi(struct mipi_dsi_host *host)
+{
+	return container_of(host, struct rzg2l_mipi_dsi, host);
+}
+
+static void rzg2l_mipi_dsi_phy_write(void __iomem *mem, u32 reg, u32 data)
+{
+	iowrite32(data, mem + reg);
+}
+
+static void rzg2l_mipi_dsi_link_write(void __iomem *mem, u32 reg, u32 data)
+{
+	iowrite32(data, mem + LINK_REG_OFFSET + reg);
+}
+
+static u32 rzg2l_mipi_dsi_link_read(void __iomem *mem, u32 reg)
+{
+	return ioread32(mem + LINK_REG_OFFSET + reg);
+}
+
+/* -----------------------------------------------------------------------------
+ * Hardware Setup
+ */
+
+static int rzg2l_mipi_dsi_startup(struct rzg2l_mipi_dsi *dsi,
+				  const struct drm_display_mode *mode)
+{
+	unsigned long hsfreq;
+	u32 txsetr;
+	u32 clstptsetr;
+	u32 lptrnstsetr;
+	u8 max_num_lanes;
+	u32 clkkpt;
+	u32 clkbfht;
+	u32 clkstpt;
+	u32 golpbkt;
+	unsigned int bpp;
+	struct {
+		u32 tclk_miss;
+		u32 t_init;
+		u32 tclk_prepare;
+		u32 tclk_settle;
+		u32 tclk_trail;
+		u32 tclk_post;
+		u32 tclk_pre;
+		u32 tclk_zero;
+		u32 tlpx;
+		u32 ths_prepare;
+		u32 ths_settle;
+		u32 ths_exit;
+		u32 ths_trail;
+		u32 ths_zero;
+	} timings;
+	u32 dphyctrl0;
+	u32 dphytim0;
+	u32 dphytim1;
+	u32 dphytim2;
+	u32 dphytim3;
+	int ret;
+
+	/* Relationship between hsclk and vclk must follow
+	 * vclk * bpp = hsclk * 8 * lanes
+	 * where vclk: video clock (Hz)
+	 *       bpp: video pixel bit depth
+	 *       hsclk: DSI HS Byte clock frequency (Hz)
+	 *       lanes: number of data lanes
+	 *
+	 * hsclk(bit) = hsclk(byte) * 8
+	 */
+
+	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+	hsfreq = (mode->clock * bpp * 8) / (8 * dsi->lanes);
+
+	/* Initializing DPHY before accessing LINK */
+
+	/* All DSI global operation timings are set with recommended setting */
+	if (hsfreq > 250000) {
+		timings.tclk_miss = 1;
+		timings.t_init = 79801;
+		timings.tclk_prepare = 8;
+		timings.tclk_settle = 9;
+		timings.tclk_trail = 7;
+		timings.tclk_post = 35;
+		timings.tclk_pre = 4;
+		timings.tclk_zero = 33;
+		timings.tlpx = 6;
+		timings.ths_prepare = 9;
+		timings.ths_settle = 9;
+		timings.ths_exit = 13;
+		timings.ths_trail = 9;
+		timings.ths_zero = 16;
+	} else {
+		timings.tclk_miss = 1;
+		timings.t_init = 79801;
+		timings.tclk_prepare = 8;
+		timings.tclk_settle = 9;
+		timings.tclk_trail = 10;
+		timings.tclk_post = 94;
+		timings.tclk_pre = 13;
+		timings.tclk_zero = 33;
+		timings.tlpx = 6;
+		timings.ths_prepare = 12;
+		timings.ths_settle = 9;
+		timings.ths_exit = 13;
+		timings.ths_trail = 17;
+		timings.ths_zero = 23;
+	}
+
+	ret = reset_control_deassert(dsi->arstc);
+	if (ret < 0)
+		return ret;
+
+	ret = reset_control_deassert(dsi->prstc);
+	if (ret < 0)
+		return ret;
+
+	ret = pm_runtime_resume_and_get(dsi->dev);
+	if (ret < 0) {
+		reset_control_assert(dsi->prstc);
+		reset_control_assert(dsi->arstc);
+		return ret;
+	}
+
+	clk_set_rate(dsi->vclk, mode->clock * 1000);
+
+	dphyctrl0 = DSIDPHYCTRL0_CAL_EN_HSRX_OFS | DSIDPHYCTRL0_CMN_MASTER_EN |
+		    DSIDPHYCTRL0_RE_VDD_DETVCCQLV18 | DSIDPHYCTRL0_EN_BGR;
+
+	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYCTRL0, dphyctrl0);
+	usleep_range(20, 30);
+
+	dphyctrl0 |= DSIDPHYCTRL0_EN_LDO1200;
+	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYCTRL0, dphyctrl0);
+	usleep_range(10, 20);
+
+	dphytim0 = DSIDPHYTIM0_TCLK_MISS(timings.tclk_miss) |
+		   DSIDPHYTIM0_T_INIT(timings.t_init);
+	dphytim1 = DSIDPHYTIM1_THS_PREPARE(timings.ths_prepare) |
+		   DSIDPHYTIM1_TCLK_PREPARE(timings.tclk_prepare) |
+		   DSIDPHYTIM1_THS_SETTLE(timings.ths_settle) |
+		   DSIDPHYTIM1_TCLK_SETTLE(timings.tclk_settle);
+	dphytim2 = DSIDPHYTIM2_TCLK_TRAIL(timings.tclk_trail) |
+		   DSIDPHYTIM2_TCLK_POST(timings.tclk_post) |
+		   DSIDPHYTIM2_TCLK_PRE(timings.tclk_pre) |
+		   DSIDPHYTIM2_TCLK_ZERO(timings.tclk_zero);
+	dphytim3 = DSIDPHYTIM3_TLPX(timings.tlpx) |
+		   DSIDPHYTIM3_THS_EXIT(timings.ths_exit) |
+		   DSIDPHYTIM3_THS_TRAIL(timings.ths_trail) |
+		   DSIDPHYTIM3_THS_ZERO(timings.ths_zero);
+
+	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM0, dphytim0);
+	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM1, dphytim1);
+	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM2, dphytim2);
+	rzg2l_mipi_dsi_phy_write(dsi->mmio, DSIDPHYTIM3, dphytim3);
+
+	reset_control_deassert(dsi->rstc);
+	udelay(1);
+
+	/* Check number of lanes capability */
+	max_num_lanes = rzg2l_mipi_dsi_link_read(dsi->mmio, TXSETR) >> 16;
+	max_num_lanes = (max_num_lanes & 0x3) + 1;
+	if (max_num_lanes < dsi->lanes) {
+		dev_err(dsi->dev, "DPHY can not support %d lanes", dsi->lanes);
+		return -EINVAL;
+	}
+
+	/* Enable Data lanes and Clock lanes */
+	txsetr = TXSETR_DLEN | TXSETR_NUMLANEUSE(dsi->lanes - 1) | TXSETR_CLEN;
+	rzg2l_mipi_dsi_link_write(dsi->mmio, TXSETR, txsetr);
+
+	/*
+	 * Global timings characteristic depends on high speed Clock Frequency
+	 * Currently MIPI DSI-IF just supports maximum FHD@60 with:
+	 * - videoclock = 148.5 (MHz)
+	 * - bpp: maximum 24bpp
+	 * - data lanes: maximum 4 lanes
+	 * Therefore maximum hsclk will be 891 Mbps.
+	 */
+
+	if (hsfreq > 445500) {
+		clkkpt = 12;
+		clkbfht = 15;
+		clkstpt = 48;
+		golpbkt = 75;
+	} else if (hsfreq > 250000) {
+		clkkpt = 7;
+		clkbfht = 8;
+		clkstpt = 27;
+		golpbkt = 40;
+	} else {
+		clkkpt = 8;
+		clkbfht = 6;
+		clkstpt = 24;
+		golpbkt = 29;
+	}
+
+	clstptsetr = CLSTPTSETR_CLKKPT(clkkpt) | CLSTPTSETR_CLKBFHT(clkbfht) |
+		     CLSTPTSETR_CLKSTPT(clkstpt);
+	rzg2l_mipi_dsi_link_write(dsi->mmio, CLSTPTSETR, clstptsetr);
+
+	lptrnstsetr = LPTRNSTSETR_GOLPBKT(golpbkt);
+	rzg2l_mipi_dsi_link_write(dsi->mmio, LPTRNSTSETR, lptrnstsetr);
+
+	return 0;
+}
+
+static void rzg2l_mipi_dsi_set_display_timing(struct rzg2l_mipi_dsi *dsi,
+					      const struct drm_display_mode *mode)
+{
+	u32 vich1ppsetr;
+	u32 vich1vssetr;
+	u32 vich1vpsetr;
+	u32 vich1hssetr;
+	u32 vich1hpsetr;
+	int dsi_format;
+	u32 delay[2];
+	u8 index;
+
+	/* Configuration for Pixel Packet */
+	dsi_format = mipi_dsi_pixel_format_to_bpp(dsi->format);
+	switch (dsi_format) {
+	case 24:
+		vich1ppsetr = VICH1PPSETR_DT_RGB24;
+		break;
+	case 18:
+		vich1ppsetr = VICH1PPSETR_DT_RGB18;
+		break;
+	}
+
+	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+		vich1ppsetr |= VICH1PPSETR_TXESYNC_PULSE;
+
+	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+		vich1ppsetr &= ~VICH1PPSETR_TXESYNC_PULSE;
+
+	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1PPSETR, vich1ppsetr);
+
+	/* Configuration for Video Parameters */
+	vich1vssetr = VICH1VSSETR_VACTIVE(mode->vdisplay) |
+		      VICH1VSSETR_VSA(mode->vsync_end - mode->vsync_start);
+	vich1vssetr |= (mode->flags & DRM_MODE_FLAG_PVSYNC) ?
+			VICH1VSSETR_VSPOL_HIGH : VICH1VSSETR_VSPOL_LOW;
+
+	vich1vpsetr = VICH1VPSETR_VFP(mode->vsync_start - mode->vdisplay) |
+		      VICH1VPSETR_VBP(mode->vtotal - mode->vsync_end);
+
+	vich1hssetr = VICH1HSSETR_HACTIVE(mode->hdisplay) |
+		      VICH1HSSETR_HSA(mode->hsync_end - mode->hsync_start);
+	vich1hssetr |= (mode->flags & DRM_MODE_FLAG_PHSYNC) ?
+			VICH1HSSETR_HSPOL_HIGH : VICH1HSSETR_HSPOL_LOW;
+
+	vich1hpsetr = VICH1HPSETR_HFP(mode->hsync_start - mode->hdisplay) |
+		      VICH1HPSETR_HBP(mode->htotal - mode->hsync_end);
+
+	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1VSSETR, vich1vssetr);
+	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1VPSETR, vich1vpsetr);
+	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1HSSETR, vich1hssetr);
+	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1HPSETR, vich1hpsetr);
+
+	/*
+	 * Configuration for Delay Value
+	 * Delay value based on 2 ranges of video clock.
+	 * 74.25MHz is videoclock of HD@60p or FHD@30p
+	 */
+
+	if (mode->clock > 74250) {
+		delay[0] = 231;
+		delay[1] = 216;
+	} else {
+		delay[0] = 220;
+		delay[1] = 212;
+	}
+
+	if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
+		index = 0;
+	else
+		index = 1;
+
+	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET1R,
+				  VICH1SET1R_DLY(delay[index]));
+}
+
+static int rzg2l_mipi_dsi_start_hs_clock(struct rzg2l_mipi_dsi *dsi)
+{
+	bool hsclk_running_mode;
+	u32 hsclksetr;
+	u32 status;
+	int ret;
+
+	hsclk_running_mode = !(dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS);
+
+	/* Start HS clock */
+	hsclksetr = HSCLKSETR_HSCLKRUN_HS | (hsclk_running_mode ?
+					     HSCLKSETR_HSCLKMODE_CONT :
+					     HSCLKSETR_HSCLKMODE_NON_CONT);
+	rzg2l_mipi_dsi_link_write(dsi->mmio, HSCLKSETR, hsclksetr);
+
+	if (hsclk_running_mode) {
+		ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
+					status & PLSR_CLLP2HS,
+					2000, 20000, false, dsi->mmio, PLSR);
+		if (ret < 0) {
+			dev_err(dsi->dev, "failed to start HS clock\n");
+			return ret;
+		}
+	}
+
+	dev_dbg(dsi->dev, "Start High Speed Clock with %s clock mode",
+		hsclk_running_mode ? "continuous" : "non-continuous");
+
+	return 0;
+}
+
+static int rzg2l_mipi_dsi_stop_hs_clock(struct rzg2l_mipi_dsi *dsi)
+{
+	bool hsclk_mode;
+	u32 status;
+	int ret;
+
+	hsclk_mode = !(dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS);
+
+	/* Stop HS clock */
+	rzg2l_mipi_dsi_link_write(dsi->mmio, HSCLKSETR,
+				  hsclk_mode ? HSCLKSETR_HSCLKMODE_CONT :
+				  HSCLKSETR_HSCLKMODE_NON_CONT);
+
+	if (hsclk_mode) {
+		ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
+					status & PLSR_CLHS2LP,
+					2000, 20000, false, dsi->mmio, PLSR);
+		if (ret < 0) {
+			dev_err(dsi->dev, "failed to stop HS clock\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int rzg2l_mipi_dsi_start_video(struct rzg2l_mipi_dsi *dsi)
+{
+	u32 vich1set0r;
+	u32 status;
+	int ret;
+
+	/* Configuration for Blanking sequence and start video input*/
+	vich1set0r = VICH1SET0R_HFPNOLP | VICH1SET0R_HBPNOLP |
+		     VICH1SET0R_HSANOLP | VICH1SET0R_VSTART;
+	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET0R, vich1set0r);
+
+	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
+				status & VICH1SR_VIRDY,
+				2000, 20000, false, dsi->mmio, VICH1SR);
+	if (ret < 0) {
+		dev_err(dsi->dev, "Failed to start video signal input\n");
+		return ret;
+	}
+
+	dev_dbg(dsi->dev, "Start video transferring");
+
+	return 0;
+}
+
+static int rzg2l_mipi_dsi_stop_video(struct rzg2l_mipi_dsi *dsi)
+{
+	u32 status;
+	int ret;
+
+	rzg2l_mipi_dsi_link_write(dsi->mmio, VICH1SET0R, VICH1SET0R_VSTPAFT);
+	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
+				(status & VICH1SR_STOP) && (!(status & VICH1SR_RUNNING)),
+				2000, 20000, false, dsi->mmio, VICH1SR);
+	if (ret < 0)
+		goto err;
+
+	ret = read_poll_timeout(rzg2l_mipi_dsi_link_read, status,
+				!(status & LINKSR_HSBUSY),
+				2000, 20000, false, dsi->mmio, LINKSR);
+	if (ret < 0)
+		goto err;
+
+	return 0;
+err:
+	dev_err(dsi->dev, "Failed to stop video signal input\n");
+	return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * Bridge
+ */
+
+static int rzg2l_mipi_dsi_attach(struct drm_bridge *bridge,
+				 enum drm_bridge_attach_flags flags)
+{
+	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
+
+	return drm_bridge_attach(bridge->encoder, dsi->next_bridge, bridge,
+				 flags);
+}
+
+static void rzg2l_mipi_dsi_atomic_enable(struct drm_bridge *bridge,
+					 struct drm_bridge_state *old_bridge_state)
+{
+	struct drm_atomic_state *state = old_bridge_state->base.state;
+	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
+	const struct drm_display_mode *mode;
+	struct drm_connector *connector;
+	struct drm_crtc *crtc;
+	int ret;
+
+	connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
+	crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
+	mode = &drm_atomic_get_new_crtc_state(state, crtc)->adjusted_mode;
+
+	ret = rzg2l_mipi_dsi_startup(dsi, mode);
+	if (ret < 0)
+		return;
+
+	rzg2l_mipi_dsi_set_display_timing(dsi, mode);
+
+	ret = rzg2l_mipi_dsi_start_hs_clock(dsi);
+	if (ret < 0)
+		return;
+
+	ret = rzg2l_mipi_dsi_start_video(dsi);
+	if (ret < 0)
+		return;
+}
+
+static void rzg2l_mipi_dsi_atomic_disable(struct drm_bridge *bridge,
+					  struct drm_bridge_state *old_bridge_state)
+{
+	struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
+
+	rzg2l_mipi_dsi_stop_video(dsi);
+	rzg2l_mipi_dsi_stop_hs_clock(dsi);
+	pm_runtime_put(dsi->dev);
+	reset_control_assert(dsi->rstc);
+	reset_control_assert(dsi->arstc);
+	reset_control_assert(dsi->prstc);
+}
+
+static enum drm_mode_status
+rzg2l_mipi_dsi_bridge_mode_valid(struct drm_bridge *bridge,
+				 const struct drm_display_info *info,
+				 const struct drm_display_mode *mode)
+{
+	if (mode->clock > 148500)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static const struct drm_bridge_funcs rzg2l_mipi_dsi_bridge_ops = {
+	.attach = rzg2l_mipi_dsi_attach,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
+	.atomic_enable = rzg2l_mipi_dsi_atomic_enable,
+	.atomic_disable = rzg2l_mipi_dsi_atomic_disable,
+	.mode_valid = rzg2l_mipi_dsi_bridge_mode_valid,
+};
+
+/* -----------------------------------------------------------------------------
+ * Host setting
+ */
+
+static int rzg2l_mipi_dsi_host_attach(struct mipi_dsi_host *host,
+				      struct mipi_dsi_device *device)
+{
+	struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host);
+	int ret;
+
+	if (device->lanes > dsi->num_data_lanes)
+		return -EINVAL;
+
+	switch (mipi_dsi_pixel_format_to_bpp(device->format)) {
+	case 24:
+	case 18:
+		break;
+	default:
+		dev_warn(dsi->dev, "unsupported format");
+		return -EINVAL;
+	}
+
+	dsi->lanes = device->lanes;
+	dsi->format = device->format;
+	dsi->mode_flags = device->mode_flags;
+
+	dsi->next_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node,
+						  1, 0);
+	if (IS_ERR(dsi->next_bridge)) {
+		ret = PTR_ERR(dsi->next_bridge);
+		dev_err(dsi->dev, "failed to get next bridge: %d\n", ret);
+		return ret;
+	}
+
+	/* Initialize the DRM bridge. */
+	dsi->bridge.funcs = &rzg2l_mipi_dsi_bridge_ops;
+	dsi->bridge.of_node = dsi->dev->of_node;
+	drm_bridge_add(&dsi->bridge);
+
+	return 0;
+}
+
+static int rzg2l_mipi_dsi_host_detach(struct mipi_dsi_host *host,
+				      struct mipi_dsi_device *device)
+{
+	struct rzg2l_mipi_dsi *dsi = host_to_rzg2l_mipi_dsi(host);
+
+	drm_bridge_remove(&dsi->bridge);
+	return 0;
+}
+
+static const struct mipi_dsi_host_ops rzg2l_mipi_dsi_host_ops = {
+	.attach = rzg2l_mipi_dsi_host_attach,
+	.detach = rzg2l_mipi_dsi_host_detach,
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe & Remove
+ */
+
+static int rzg2l_mipi_dsi_parse_dt(struct rzg2l_mipi_dsi *dsi)
+{
+	struct device_node *ep;
+	u32 data_lanes[4];
+	int ret;
+
+	ep = of_graph_get_endpoint_by_regs(dsi->dev->of_node, 1, 0);
+	if (!ep) {
+		dev_dbg(dsi->dev, "unconnected port@1\n");
+		return -ENODEV;
+	}
+
+	ret = of_property_read_variable_u32_array(ep, "data-lanes", data_lanes,
+						  1, 4);
+	of_node_put(ep);
+
+	if (ret < 0) {
+		dev_err(dsi->dev, "missing or invalid data-lanes property\n");
+		return -ENODEV;
+	}
+
+	dsi->num_data_lanes = ret;
+	return 0;
+}
+
+static int rzg2l_mipi_dsi_probe(struct platform_device *pdev)
+{
+	struct rzg2l_mipi_dsi *dsi;
+	int ret;
+
+	dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
+	if (!dsi)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, dsi);
+	dsi->dev = &pdev->dev;
+
+	ret = rzg2l_mipi_dsi_parse_dt(dsi);
+	if (ret < 0)
+		return ret;
+
+	dsi->mmio = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(dsi->mmio))
+		return PTR_ERR(dsi->mmio);
+
+	dsi->vclk = devm_clk_get(dsi->dev, "vclk");
+	if (IS_ERR(dsi->vclk))
+		return PTR_ERR(dsi->vclk);
+
+	dsi->rstc = devm_reset_control_get_exclusive(dsi->dev, "rst");
+	if (IS_ERR(dsi->rstc))
+		return dev_err_probe(dsi->dev, PTR_ERR(dsi->rstc),
+				     "failed to get arst\n");
+
+	dsi->arstc = devm_reset_control_get_exclusive(dsi->dev, "arst");
+	if (IS_ERR(dsi->arstc))
+		return dev_err_probe(&pdev->dev, PTR_ERR(dsi->arstc),
+				     "failed to get arst\n");
+
+	dsi->prstc = devm_reset_control_get_exclusive(dsi->dev, "prst");
+	if (IS_ERR(dsi->prstc))
+		return dev_err_probe(dsi->dev, PTR_ERR(dsi->prstc),
+				     "failed to get prst\n");
+
+	pm_runtime_enable(dsi->dev);
+
+	/* Init host device */
+	dsi->host.dev = dsi->dev;
+	dsi->host.ops = &rzg2l_mipi_dsi_host_ops;
+	ret = mipi_dsi_host_register(&dsi->host);
+	if (ret < 0)
+		goto out_pm_get;
+
+	return 0;
+out_pm_get:
+	pm_runtime_disable(dsi->dev);
+	return ret;
+}
+
+static int rzg2l_mipi_dsi_remove(struct platform_device *pdev)
+{
+	struct rzg2l_mipi_dsi *dsi = platform_get_drvdata(pdev);
+
+	mipi_dsi_host_unregister(&dsi->host);
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static const struct of_device_id rzg2l_mipi_dsi_of_table[] = {
+	{ .compatible = "renesas,rzg2l-mipi-dsi" },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver rzg2l_mipi_dsi_platform_driver = {
+	.driver	= {
+		.name = "rzg2l-mipi-dsi",
+		.of_match_table = rzg2l_mipi_dsi_of_table,
+	},
+	.probe	= rzg2l_mipi_dsi_probe,
+	.remove	= rzg2l_mipi_dsi_remove,
+};
+
+module_platform_driver(rzg2l_mipi_dsi_platform_driver);
+
+MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com");
+MODULE_DESCRIPTION("Renesas RZ/G2L MIPI DSI Encoder Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
new file mode 100644
index 000000000000..40c96330e79a
--- /dev/null
+++ b/drivers/gpu/drm/rcar-du/rzg2l_mipi_dsi_regs.h
@@ -0,0 +1,149 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * RZ/G2L MIPI DSI Interface Registers Definitions
+ *
+ * Copyright (C) 2022 Renesas Electronics Corporation
+ */
+
+#ifndef __RZG2L_MIPI_DSI_REGS_H__
+#define __RZG2L_MIPI_DSI_REGS_H__
+
+/* DPHY Registers */
+#define DSIDPHYCTRL0			0x00
+#define DSIDPHYCTRL0_CAL_EN_HSRX_OFS	BIT(16)
+#define DSIDPHYCTRL0_CMN_MASTER_EN	BIT(8)
+#define DSIDPHYCTRL0_RE_VDD_DETVCCQLV18	BIT(2)
+#define DSIDPHYCTRL0_EN_LDO1200		BIT(1)
+#define DSIDPHYCTRL0_EN_BGR		BIT(0)
+
+#define DSIDPHYTIM0			0x04
+#define DSIDPHYTIM0_TCLK_MISS(x)	((x) << 24)
+#define DSIDPHYTIM0_T_INIT(x)		((x) << 0)
+
+#define DSIDPHYTIM1			0x08
+#define DSIDPHYTIM1_THS_PREPARE(x)	((x) << 24)
+#define DSIDPHYTIM1_TCLK_PREPARE(x)	((x) << 16)
+#define DSIDPHYTIM1_THS_SETTLE(x)	((x) << 8)
+#define DSIDPHYTIM1_TCLK_SETTLE(x)	((x) << 0)
+
+#define DSIDPHYTIM2			0x0c
+#define DSIDPHYTIM2_TCLK_TRAIL(x)	((x) << 24)
+#define DSIDPHYTIM2_TCLK_POST(x)	((x) << 16)
+#define DSIDPHYTIM2_TCLK_PRE(x)		((x) << 8)
+#define DSIDPHYTIM2_TCLK_ZERO(x)	((x) << 0)
+
+#define DSIDPHYTIM3			0x10
+#define DSIDPHYTIM3_TLPX(x)		((x) << 24)
+#define DSIDPHYTIM3_THS_EXIT(x)		((x) << 16)
+#define DSIDPHYTIM3_THS_TRAIL(x)	((x) << 8)
+#define DSIDPHYTIM3_THS_ZERO(x)		((x) << 0)
+
+/* --------------------------------------------------------*/
+/* Link Registers */
+#define LINK_REG_OFFSET			0x10000
+
+/* Link Status Register */
+#define LINKSR				0x10
+#define LINKSR_LPBUSY			BIT(13)
+#define LINKSR_HSBUSY			BIT(12)
+#define LINKSR_VICHRUN1			BIT(8)
+#define LINKSR_SQCHRUN1			BIT(4)
+#define LINKSR_SQCHRUN0			BIT(0)
+
+/* Tx Set Register */
+#define TXSETR				0x100
+#define TXSETR_NUMLANECAP		(0x3 << 16)
+#define TXSETR_DLEN			BIT(9)
+#define TXSETR_CLEN			BIT(8)
+#define TXSETR_NUMLANEUSE(x)		(((x) & 0x3) << 0)
+
+/* HS Clock Set Register */
+#define HSCLKSETR			0x104
+#define HSCLKSETR_HSCLKMODE_CONT	BIT(1)
+#define HSCLKSETR_HSCLKMODE_NON_CONT	(0 << 1)
+#define HSCLKSETR_HSCLKRUN_HS		BIT(0)
+#define HSCLKSETR_HSCLKRUN_LP		(0 << 0)
+
+/* Reset Control Register */
+#define RSTCR				0x110
+#define RSTCR_SWRST			BIT(0)
+#define RSTCR_FCETXSTP			BIT(16)
+
+/* Reset Status Register */
+#define RSTSR				0x114
+#define RSTSR_DL0DIR			BIT(15)
+#define RSTSR_DLSTPST			(0xf << 8)
+#define RSTSR_SWRSTV1			BIT(4)
+#define RSTSR_SWRSTIB			BIT(3)
+#define RSTSR_SWRSTAPB			BIT(2)
+#define RSTSR_SWRSTLP			BIT(1)
+#define RSTSR_SWRSTHS			BIT(0)
+
+/* Clock Lane Stop Time Set Register */
+#define CLSTPTSETR			0x314
+#define CLSTPTSETR_CLKKPT(x)		((x) << 24)
+#define CLSTPTSETR_CLKBFHT(x)		((x) << 16)
+#define CLSTPTSETR_CLKSTPT(x)		((x) << 2)
+
+/* LP Transition Time Set Register */
+#define LPTRNSTSETR			0x318
+#define LPTRNSTSETR_GOLPBKT(x)		((x) << 0)
+
+/* Physical Lane Status Register */
+#define PLSR				0x320
+#define PLSR_CLHS2LP			BIT(27)
+#define PLSR_CLLP2HS			BIT(26)
+
+/* Video-Input Channel 1 Set 0 Register */
+#define VICH1SET0R			0x400
+#define VICH1SET0R_VSEN			BIT(12)
+#define VICH1SET0R_HFPNOLP		BIT(10)
+#define VICH1SET0R_HBPNOLP		BIT(9)
+#define VICH1SET0R_HSANOLP		BIT(8)
+#define VICH1SET0R_VSTPAFT		BIT(1)
+#define VICH1SET0R_VSTART		BIT(0)
+
+/* Video-Input Channel 1 Set 1 Register */
+#define VICH1SET1R			0x404
+#define VICH1SET1R_DLY(x)		(((x) & 0xfff) << 2)
+
+/* Video-Input Channel 1 Status Register */
+#define VICH1SR				0x410
+#define VICH1SR_VIRDY			BIT(3)
+#define VICH1SR_RUNNING			BIT(2)
+#define VICH1SR_STOP			BIT(1)
+#define VICH1SR_START			BIT(0)
+
+/* Video-Input Channel 1 Pixel Packet Set Register */
+#define VICH1PPSETR			0x420
+#define VICH1PPSETR_DT_RGB18		(0x1e << 16)
+#define VICH1PPSETR_DT_RGB18_LS		(0x2e << 16)
+#define VICH1PPSETR_DT_RGB24		(0x3e << 16)
+#define VICH1PPSETR_TXESYNC_PULSE	BIT(15)
+#define VICH1PPSETR_VC(x)		((x) << 22)
+
+/* Video-Input Channel 1 Vertical Size Set Register */
+#define VICH1VSSETR			0x428
+#define VICH1VSSETR_VACTIVE(x)		(((x) & 0x7fff) << 16)
+#define VICH1VSSETR_VSPOL_LOW		BIT(15)
+#define VICH1VSSETR_VSPOL_HIGH		(0 << 15)
+#define VICH1VSSETR_VSA(x)		(((x) & 0xfff) << 0)
+
+/* Video-Input Channel 1 Vertical Porch Set Register */
+#define VICH1VPSETR			0x42C
+#define VICH1VPSETR_VFP(x)		(((x) & 0x1fff) << 16)
+#define VICH1VPSETR_VBP(x)		(((x) & 0x1fff) << 0)
+
+/* Video-Input Channel 1 Horizontal Size Set Register */
+#define VICH1HSSETR			0x430
+#define VICH1HSSETR_HACTIVE(x)		(((x) & 0x7fff) << 16)
+#define VICH1HSSETR_HSPOL_LOW		BIT(15)
+#define VICH1HSSETR_HSPOL_HIGH		(0 << 15)
+#define VICH1HSSETR_HSA(x)		(((x) & 0xfff) << 0)
+
+/* Video-Input Channel 1 Horizontal Porch Set Register */
+#define VICH1HPSETR			0x434
+#define VICH1HPSETR_HFP(x)		(((x) & 0x1fff) << 16)
+#define VICH1HPSETR_HBP(x)		(((x) & 0x1fff) << 0)
+
+#endif /* __RZG2L_MIPI_DSI_REGS_H__ */