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From: Chris Zhong <zyw@rock-chips.com>
To: heiko@sntech.de, linux-rockchip@lists.infradead.org,
	mark.yao@rock-chips.com, treding@nvidia.com
Subject: [PATCH v5 07/11] drm/bridge: Add Synopsys DesignWare MIPI DSI host
	controller driver
Date: Thu, 26 Nov 2015 15:50:21 +0800
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Cc: Vincent Palatin <vpalatin@chromium.org>, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org, Andy Yan <andy.yan@rock-chips.com>,
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	Ajay Kumar <ajaykumar.rs@samsung.com>
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add Synopsys DesignWare MIPI DSI host controller driver support.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
---

Changes in v5:
Adviced by Thierry
- use hyphens instead of underscore
- use encoder in drm_bridge
- reformatting the dptdin table
- use readx_poll_timeout to check register
- use msleep to wait
- add a comment to explain how to program phy
- change the program code to symbolic names
- check this for validity of find_panel and clk_prepare_enable
- eliminate the configuration clock
- some optimization for coding style

Changes in v4:
- eliminate some warnning

Changes in v3: None
Changes in v2: None

 drivers/gpu/drm/bridge/Kconfig       |   10 +
 drivers/gpu/drm/bridge/Makefile      |    1 +
 drivers/gpu/drm/bridge/dw-mipi-dsi.c | 1084 ++++++++++++++++++++++++++++++++++
 include/drm/bridge/dw_mipi_dsi.h     |   28 +
 4 files changed, 1123 insertions(+)
 create mode 100644 drivers/gpu/drm/bridge/dw-mipi-dsi.c
 create mode 100644 include/drm/bridge/dw_mipi_dsi.h

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 6dddd39..d9ca7b4 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -22,6 +22,16 @@ config DRM_DW_HDMI_AHB_AUDIO
 	  Designware HDMI block.  This is used in conjunction with
 	  the i.MX6 HDMI driver.
 
+config DRM_DW_MIPI_DSI
+	tristate "Synopsys DesignWare MIPI DSI host controller bridge"
+	depends on DRM
+	select DRM_KMS_HELPER
+	select DRM_MIPI_DSI
+	select DRM_PANEL
+	help
+	  Choose this if you want to use the Synopsys DesignWare MIPI DSI host
+	  controller bridge. If M is selected, the module will be
+	  called dw-mipi-dsi.
 
 config DRM_NXP_PTN3460
 	tristate "NXP PTN3460 DP/LVDS bridge"
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index d4e28be..96c54af 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -2,5 +2,6 @@ ccflags-y := -Iinclude/drm
 
 obj-$(CONFIG_DRM_DW_HDMI) += dw_hdmi.o
 obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw_hdmi-ahb-audio.o
+obj-$(CONFIG_DRM_DW_MIPI_DSI) += dw-mipi-dsi.o
 obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
 obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
diff --git a/drivers/gpu/drm/bridge/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/dw-mipi-dsi.c
new file mode 100644
index 0000000..26b96e8
--- /dev/null
+++ b/drivers/gpu/drm/bridge/dw-mipi-dsi.c
@@ -0,0 +1,1084 @@
+/*
+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <drm/bridge/dw_mipi_dsi.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+#include <video/mipi_display.h>
+
+#define DSI_VERSION			0x00
+
+#define DSI_PWR_UP			0x04
+#define RESET				0
+#define POWERUP				BIT(0)
+
+#define DSI_CLKMGR_CFG			0x08
+#define TO_CLK_DIVIDSION(div)		(((div) & 0xff) << 8)
+#define TX_ESC_CLK_DIVIDSION(div)	(((div) & 0xff) << 0)
+
+#define DSI_DPI_VCID			0x0c
+#define DPI_VID(vid)			(((vid) & 0x3) << 0)
+
+#define DSI_DPI_COLOR_CODING		0x10
+#define EN18_LOOSELY			BIT(8)
+#define DPI_COLOR_CODING_16BIT_1	0x0
+#define DPI_COLOR_CODING_16BIT_2	0x1
+#define DPI_COLOR_CODING_16BIT_3	0x2
+#define DPI_COLOR_CODING_18BIT_1	0x3
+#define DPI_COLOR_CODING_18BIT_2	0x4
+#define DPI_COLOR_CODING_24BIT		0x5
+
+#define DSI_DPI_CFG_POL			0x14
+#define COLORM_ACTIVE_LOW		BIT(4)
+#define SHUTD_ACTIVE_LOW		BIT(3)
+#define HSYNC_ACTIVE_LOW		BIT(2)
+#define VSYNC_ACTIVE_LOW		BIT(1)
+#define DATAEN_ACTIVE_LOW		BIT(0)
+
+#define DSI_DPI_LP_CMD_TIM		0x18
+#define OUTVACT_LPCMD_TIME(p)		(((p) & 0xff) << 16)
+#define INVACT_LPCMD_TIME(p)		((p) & 0xff)
+
+#define DSI_DBI_CFG			0x20
+#define DSI_DBI_CMDSIZE			0x28
+
+#define DSI_PCKHDL_CFG			0x2c
+#define EN_CRC_RX			BIT(4)
+#define EN_ECC_RX			BIT(3)
+#define EN_BTA				BIT(2)
+#define EN_EOTP_RX			BIT(1)
+#define EN_EOTP_TX			BIT(0)
+
+#define DSI_MODE_CFG			0x34
+#define ENABLE_VIDEO_MODE		0
+#define ENABLE_CMD_MODE			BIT(0)
+
+#define DSI_VID_MODE_CFG		0x38
+#define FRAME_BTA_ACK			BIT(14)
+#define ENABLE_LOW_POWER		(0x3f << 8)
+#define ENABLE_LOW_POWER_MASK		(0x3f << 8)
+#define VID_MODE_TYPE_BURST_SYNC_PULSES		0x2
+#define VID_MODE_TYPE_MASK			0x3
+
+#define DSI_VID_PKT_SIZE		0x3c
+#define VID_PKT_SIZE(p)			(((p) & 0x3fff) << 0)
+#define VID_PKT_MAX_SIZE		0x3fff
+
+#define DSI_VID_HSA_TIME		0x48
+#define DSI_VID_HBP_TIME		0x4c
+#define DSI_VID_HLINE_TIME		0x50
+#define DSI_VID_VSA_LINES		0x54
+#define DSI_VID_VBP_LINES		0x58
+#define DSI_VID_VFP_LINES		0x5c
+#define DSI_VID_VACTIVE_LINES		0x60
+#define DSI_CMD_MODE_CFG		0x68
+#define MAX_RD_PKT_SIZE_LP		BIT(24)
+#define DCS_LW_TX_LP			BIT(19)
+#define DCS_SR_0P_TX_LP			BIT(18)
+#define DCS_SW_1P_TX_LP			BIT(17)
+#define DCS_SW_0P_TX_LP			BIT(16)
+#define GEN_LW_TX_LP			BIT(14)
+#define GEN_SR_2P_TX_LP			BIT(13)
+#define GEN_SR_1P_TX_LP			BIT(12)
+#define GEN_SR_0P_TX_LP			BIT(11)
+#define GEN_SW_2P_TX_LP			BIT(10)
+#define GEN_SW_1P_TX_LP			BIT(9)
+#define GEN_SW_0P_TX_LP			BIT(8)
+#define EN_ACK_RQST			BIT(1)
+#define EN_TEAR_FX			BIT(0)
+
+#define CMD_MODE_ALL_LP			(MAX_RD_PKT_SIZE_LP | \
+					 DCS_LW_TX_LP | \
+					 DCS_SR_0P_TX_LP | \
+					 DCS_SW_1P_TX_LP | \
+					 DCS_SW_0P_TX_LP | \
+					 GEN_LW_TX_LP | \
+					 GEN_SR_2P_TX_LP | \
+					 GEN_SR_1P_TX_LP | \
+					 GEN_SR_0P_TX_LP | \
+					 GEN_SW_2P_TX_LP | \
+					 GEN_SW_1P_TX_LP | \
+					 GEN_SW_0P_TX_LP)
+
+#define DSI_GEN_HDR			0x6c
+#define GEN_HDATA(data)			(((data) & 0xffff) << 8)
+#define GEN_HDATA_MASK			(0xffff << 8)
+#define GEN_HTYPE(type)			(((type) & 0xff) << 0)
+#define GEN_HTYPE_MASK			0xff
+
+#define DSI_GEN_PLD_DATA		0x70
+
+#define DSI_CMD_PKT_STATUS		0x74
+#define GEN_CMD_EMPTY			BIT(0)
+#define GEN_CMD_FULL			BIT(1)
+#define GEN_PLD_W_EMPTY			BIT(2)
+#define GEN_PLD_W_FULL			BIT(3)
+#define GEN_PLD_R_EMPTY			BIT(4)
+#define GEN_PLD_R_FULL			BIT(5)
+#define GEN_RD_CMD_BUSY			BIT(6)
+
+#define DSI_TO_CNT_CFG			0x78
+#define HSTX_TO_CNT(p)			(((p) & 0xffff) << 16)
+#define LPRX_TO_CNT(p)			((p) & 0xffff)
+
+#define DSI_BTA_TO_CNT			0x8c
+
+#define DSI_LPCLK_CTRL			0x94
+#define AUTO_CLKLANE_CTRL		BIT(1)
+#define PHY_TXREQUESTCLKHS		BIT(0)
+
+#define DSI_PHY_TMR_LPCLK_CFG		0x98
+#define PHY_CLKHS2LP_TIME(lbcc)		(((lbcc) & 0x3ff) << 16)
+#define PHY_CLKLP2HS_TIME(lbcc)		((lbcc) & 0x3ff)
+
+#define DSI_PHY_TMR_CFG			0x9c
+#define PHY_HS2LP_TIME(lbcc)		(((lbcc) & 0xff) << 24)
+#define PHY_LP2HS_TIME(lbcc)		(((lbcc) & 0xff) << 16)
+#define MAX_RD_TIME(lbcc)		((lbcc) & 0x7fff)
+
+#define DSI_PHY_RSTZ			0xa0
+#define PHY_DISFORCEPLL			0
+#define PHY_ENFORCEPLL			BIT(3)
+#define PHY_DISABLECLK			0
+#define PHY_ENABLECLK			BIT(2)
+#define PHY_RSTZ			0
+#define PHY_UNRSTZ			BIT(1)
+#define PHY_SHUTDOWNZ			0
+#define PHY_UNSHUTDOWNZ			BIT(0)
+
+#define DSI_PHY_IF_CFG			0xa4
+#define N_LANES(n)			((((n) - 1) & 0x3) << 0)
+#define PHY_STOP_WAIT_TIME(cycle)	(((cycle) & 0xff) << 8)
+
+#define DSI_PHY_STATUS			0xb0
+#define LOCK				BIT(0)
+#define STOP_STATE_CLK_LANE		BIT(2)
+
+#define DSI_PHY_TST_CTRL0		0xb4
+#define PHY_TESTCLK			BIT(1)
+#define PHY_UNTESTCLK			0
+#define PHY_TESTCLR			BIT(0)
+#define PHY_UNTESTCLR			0
+
+#define DSI_PHY_TST_CTRL1		0xb8
+#define PHY_TESTEN			BIT(16)
+#define PHY_UNTESTEN			0
+#define PHY_TESTDOUT(n)			(((n) & 0xff) << 8)
+#define PHY_TESTDIN(n)			(((n) & 0xff) << 0)
+
+#define DSI_INT_ST0			0xbc
+#define DSI_INT_ST1			0xc0
+#define DSI_INT_MSK0			0xc4
+#define DSI_INT_MSK1			0xc8
+
+#define PHY_STATUS_TIMEOUT_US		10000
+#define CMD_PKT_STATUS_TIMEOUT_US	20000
+
+#define BYPASS_VCO_RANGE	BIT(7)
+#define VCO_RANGE_CON_SEL(val)	(((val) & 0x7) << 3)
+#define VCO_IN_CAP_CON_DEFAULT	(0x0 << 1)
+#define VCO_IN_CAP_CON_LOW	(0x1 << 1)
+#define VCO_IN_CAP_CON_HIGH	(0x2 << 1)
+#define REF_BIAS_CUR_SEL	BIT(0)
+
+#define CP_CURRENT_3MA		BIT(3)
+#define CP_PROGRAM_EN		BIT(7)
+#define LPF_PROGRAM_EN		BIT(6)
+#define LPF_RESISTORS_20_KOHM	0
+
+#define HSFREQRANGE_SEL(val)	(((val) & 0x3f) << 1)
+
+#define INPUT_DIVIDER(val)	((val - 1) & 0x7f)
+#define LOW_PROGRAM_EN		0
+#define HIGH_PROGRAM_EN		BIT(7)
+#define LOOP_DIV_LOW_SEL(val)	((val - 1) & 0x1f)
+#define LOOP_DIV_HIGH_SEL(val)	(((val - 1) >> 5) & 0x1f)
+#define PLL_LOOP_DIV_EN		BIT(5)
+#define PLL_INPUT_DIV_EN	BIT(4)
+
+#define POWER_CONTROL		BIT(6)
+#define INTERNAL_REG_CURRENT	BIT(3)
+#define BIAS_BLOCK_ON		BIT(2)
+#define BANDGAP_ON		BIT(0)
+
+#define TER_RESISTOR_HIGH	BIT(7)
+#define	TER_RESISTOR_LOW	0
+#define LEVEL_SHIFTERS_ON	BIT(6)
+#define TER_CAL_DONE		BIT(5)
+#define SETRD_MAX		(0x7 << 2)
+#define POWER_MANAGE		BIT(1)
+#define TER_RESISTORS_ON	BIT(0)
+
+#define BIASEXTR_SEL(val)	((val) & 0x7)
+#define BANDGAP_SEL(val)	((val) & 0x7)
+#define TLP_PROGRAM_EN		BIT(7)
+#define THS_PRE_PROGRAM_EN	BIT(7)
+#define THS_ZERO_PROGRAM_EN	BIT(6)
+
+enum {
+	BANDGAP_97_07,
+	BANDGAP_98_05,
+	BANDGAP_99_02,
+	BANDGAP_100_00,
+	BANDGAP_93_17,
+	BANDGAP_94_15,
+	BANDGAP_95_12,
+	BANDGAP_96_10,
+};
+
+enum {
+	BIASEXTR_87_1,
+	BIASEXTR_91_5,
+	BIASEXTR_95_9,
+	BIASEXTR_100,
+	BIASEXTR_105_94,
+	BIASEXTR_111_88,
+	BIASEXTR_118_8,
+	BIASEXTR_127_7,
+};
+
+struct dw_mipi_dsi {
+	struct mipi_dsi_host dsi_host;
+	struct drm_connector connector;
+	struct drm_bridge *bridge;
+	struct drm_panel *panel;
+	struct device *dev;
+
+	void __iomem *base;
+
+	struct clk *pllref_clk;
+	struct clk *pclk;
+
+	unsigned int lane_mbps; /* per lane */
+	u32 channel;
+	u32 lanes;
+	u32 format;
+	u16 input_div;
+	u16 feedback_div;
+	struct drm_display_mode *mode;
+
+	const struct dw_mipi_dsi_plat_data *pdata;
+
+	bool enabled;
+};
+
+enum dw_mipi_dsi_mode {
+	DW_MIPI_DSI_CMD_MODE,
+	DW_MIPI_DSI_VID_MODE,
+};
+
+struct dphy_pll_testdin_map {
+	unsigned int max_mbps;
+	u8 testdin;
+};
+
+/* The table is based on 27MHz DPHY pll reference clock. */
+static const struct dphy_pll_testdin_map dptdin_map[] = {
+	{  90, 0x00}, { 100, 0x10}, { 110, 0x20}, { 130, 0x01},
+	{ 140, 0x11}, { 150, 0x21}, { 170, 0x02}, { 180, 0x12},
+	{ 200, 0x22}, { 220, 0x03}, { 240, 0x13}, { 250, 0x23},
+	{ 270, 0x04}, { 300, 0x14}, { 330, 0x05}, { 360, 0x15},
+	{ 400, 0x25}, { 450, 0x06}, { 500, 0x16}, { 550, 0x07},
+	{ 600, 0x17}, { 650, 0x08}, { 700, 0x18}, { 750, 0x09},
+	{ 800, 0x19}, { 850, 0x29}, { 900, 0x39}, { 950, 0x0a},
+	{1000, 0x1a}, {1050, 0x2a}, {1100, 0x3a}, {1150, 0x0b},
+	{1200, 0x1b}, {1250, 0x2b}, {1300, 0x3b}, {1350, 0x0c},
+	{1400, 0x1c}, {1450, 0x2c}, {1500, 0x3c}
+};
+
+static inline struct dw_mipi_dsi *host_to_dsi(struct mipi_dsi_host *host)
+{
+	return container_of(host, struct dw_mipi_dsi, dsi_host);
+}
+
+static inline struct dw_mipi_dsi *con_to_dsi(struct drm_connector *con)
+{
+	return container_of(con, struct dw_mipi_dsi, connector);
+}
+
+int dw_mipi_dsi_get_encoder_pixel_format(struct drm_encoder *encoder)
+{
+	struct dw_mipi_dsi *dsi = encoder->bridge->driver_private;
+
+	return dsi->format;
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_get_encoder_pixel_format);
+
+static int max_mbps_to_testdin(unsigned int max_mbps)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dptdin_map); i++)
+		if (dptdin_map[i].max_mbps > max_mbps)
+			return dptdin_map[i].testdin;
+
+	return -EINVAL;
+}
+
+static inline void dsi_write(struct dw_mipi_dsi *dsi, u32 reg, u32 val)
+{
+	writel(val, dsi->base + reg);
+}
+
+static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg)
+{
+	return readl(dsi->base + reg);
+}
+
+/*
+ * The controller should generate 2 frames before
+ * preparing the peripheral.
+ */
+static void dw_mipi_dsi_wait_for_two_frames(struct dw_mipi_dsi *dsi)
+{
+	int refresh, two_frames;
+
+	refresh = drm_mode_vrefresh(dsi->mode);
+	two_frames = DIV_ROUND_UP(MSEC_PER_SEC, refresh) * 2;
+	msleep(two_frames);
+}
+
+static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi *dsi, u8 test_code,
+				 u8 test_data)
+{
+	/*
+	 * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
+	 * is latched internally as the current test code. Test data is
+	 * programmed internally by rising edge on TESTCLK.
+	 */
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
+
+	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
+					  PHY_TESTDIN(test_code));
+
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
+
+	dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
+					  PHY_TESTDIN(test_data));
+
+	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
+}
+
+static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
+{
+	int ret, testdin, vco, val;
+
+	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
+
+	testdin = max_mbps_to_testdin(dsi->lane_mbps);
+	if (testdin < 0) {
+		dev_err(dsi->dev,
+			"failed to get testdin for %dmbps lane clock\n",
+			dsi->lane_mbps);
+		return testdin;
+	}
+
+	dsi_write(dsi, DSI_PWR_UP, POWERUP);
+
+	dw_mipi_dsi_phy_write(dsi, 0x10, BYPASS_VCO_RANGE |
+					 VCO_RANGE_CON_SEL(vco) |
+					 VCO_IN_CAP_CON_LOW |
+					 REF_BIAS_CUR_SEL);
+
+	dw_mipi_dsi_phy_write(dsi, 0x11, CP_CURRENT_3MA);
+	dw_mipi_dsi_phy_write(dsi, 0x12, CP_PROGRAM_EN | LPF_PROGRAM_EN |
+					 LPF_RESISTORS_20_KOHM);
+
+	dw_mipi_dsi_phy_write(dsi, 0x44, HSFREQRANGE_SEL(testdin));
+
+	dw_mipi_dsi_phy_write(dsi, 0x17, INPUT_DIVIDER(dsi->input_div));
+	dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_LOW_SEL(dsi->feedback_div) |
+					 LOW_PROGRAM_EN);
+	dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
+					 HIGH_PROGRAM_EN);
+	dw_mipi_dsi_phy_write(dsi, 0x19, PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+
+	dw_mipi_dsi_phy_write(dsi, 0x20, POWER_CONTROL | INTERNAL_REG_CURRENT |
+					 BIAS_BLOCK_ON | BANDGAP_ON);
+
+	dw_mipi_dsi_phy_write(dsi, 0x21, TER_RESISTOR_LOW | TER_CAL_DONE |
+					 SETRD_MAX | TER_RESISTORS_ON);
+	dw_mipi_dsi_phy_write(dsi, 0x21, TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
+					 SETRD_MAX | POWER_MANAGE |
+					 TER_RESISTORS_ON);
+
+	dw_mipi_dsi_phy_write(dsi, 0x22, LOW_PROGRAM_EN |
+					 BIASEXTR_SEL(BIASEXTR_127_7));
+	dw_mipi_dsi_phy_write(dsi, 0x22, HIGH_PROGRAM_EN |
+					 BANDGAP_SEL(BANDGAP_96_10));
+
+	dw_mipi_dsi_phy_write(dsi, 0x70, TLP_PROGRAM_EN | 0xf);
+	dw_mipi_dsi_phy_write(dsi, 0x71, THS_PRE_PROGRAM_EN | 0x55);
+	dw_mipi_dsi_phy_write(dsi, 0x72, THS_ZERO_PROGRAM_EN | 0xa);
+
+	dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
+				     PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
+
+	ret = readx_poll_timeout(readl, dsi->base + DSI_PHY_STATUS,
+				 val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(dsi->dev, "failed to wait for phy lock state\n");
+		return ret;
+	}
+
+	ret = readx_poll_timeout(readl, dsi->base + DSI_PHY_STATUS,
+				 val, val & STOP_STATE_CLK_LANE, 1000,
+				 PHY_STATUS_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(dsi->dev,
+			"failed to wait for phy clk lane stop state\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi)
+{
+	unsigned int bpp, i, pre;
+	unsigned long mpclk, pllref, tmp;
+	unsigned int m = 1, n = 1, target_mbps = 1000;
+	unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
+
+	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+	if (bpp < 0) {
+		dev_err(dsi->dev, "failed to get bpp for pixel format %d\n",
+			dsi->format);
+		return bpp;
+	}
+
+	mpclk = DIV_ROUND_UP(dsi->mode->clock, MSEC_PER_SEC);
+	if (mpclk) {
+		/* take 1 / 0.9, since mbps must big than bandwidth of RGB */
+		tmp = mpclk * (bpp / dsi->lanes) * 10 / 9;
+		if (tmp < max_mbps)
+			target_mbps = tmp;
+		else
+			dev_err(dsi->dev, "DPHY clock frequency is out of range\n");
+	}
+
+	pllref = DIV_ROUND_UP(clk_get_rate(dsi->pllref_clk), USEC_PER_SEC);
+	tmp = pllref;
+
+	for (i = 1; i < 6; i++) {
+		pre = pllref / i;
+		if ((tmp > (target_mbps % pre)) && (target_mbps / pre < 512)) {
+			tmp = target_mbps % pre;
+			n = i;
+			m = target_mbps / pre;
+		}
+		if (tmp == 0)
+			break;
+	}
+
+	dsi->lane_mbps = pllref / n * m;
+	dsi->input_div = n;
+	dsi->feedback_div = m;
+
+	return 0;
+}
+
+static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
+				   struct mipi_dsi_device *device)
+{
+	struct dw_mipi_dsi *dsi = host_to_dsi(host);
+
+	if (device->lanes > dsi->pdata->max_data_lanes) {
+		dev_err(dsi->dev, "the number of data lanes(%u) is too many\n",
+				device->lanes);
+		return -EINVAL;
+	}
+
+	if (!(device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) ||
+	    !(device->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)) {
+		dev_err(dsi->dev, "device mode is unsupported\n");
+		return -EINVAL;
+	}
+
+	dsi->lanes = device->lanes;
+	dsi->channel = device->channel;
+	dsi->format = device->format;
+	dsi->panel = of_drm_find_panel(device->dev.of_node);
+	if (dsi->panel)
+		return drm_panel_attach(dsi->panel, &dsi->connector);
+
+	return -EINVAL;
+}
+
+static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host,
+				   struct mipi_dsi_device *device)
+{
+	struct dw_mipi_dsi *dsi = host_to_dsi(host);
+
+	drm_panel_detach(dsi->panel);
+
+	return 0;
+}
+
+static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 val)
+{
+	int ret;
+
+	ret = readx_poll_timeout(readl, dsi->base + DSI_CMD_PKT_STATUS,
+				 val, !(val & GEN_CMD_FULL), 1000,
+				 CMD_PKT_STATUS_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(dsi->dev, "failed to get available command FIFO\n");
+		return ret;
+	}
+
+	dsi_write(dsi, DSI_GEN_HDR, val);
+
+	ret = readx_poll_timeout(readl, dsi->base + DSI_CMD_PKT_STATUS,
+				 val, val & (GEN_CMD_EMPTY | GEN_PLD_W_EMPTY),
+				 1000, CMD_PKT_STATUS_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(dsi->dev, "failed to write command FIFO\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dw_mipi_dsi_dcs_short_write(struct dw_mipi_dsi *dsi,
+				       const struct mipi_dsi_msg *msg)
+{
+	const u16 *tx_buf = msg->tx_buf;
+	u32 val = GEN_HDATA(*tx_buf) | GEN_HTYPE(msg->type);
+
+	if (msg->tx_len > 2) {
+		dev_err(dsi->dev, "too long tx buf length %zu for short write\n",
+			msg->tx_len);
+		return -EINVAL;
+	}
+
+	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, val);
+}
+
+static int dw_mipi_dsi_dcs_long_write(struct dw_mipi_dsi *dsi,
+				      const struct mipi_dsi_msg *msg)
+{
+	const u32 *tx_buf = msg->tx_buf;
+	int len = msg->tx_len, pld_data_bytes = sizeof(*tx_buf), ret;
+	u32 val = GEN_HDATA(msg->tx_len) | GEN_HTYPE(msg->type);
+	u32 remainder = 0;
+
+	if (msg->tx_len < 3) {
+		dev_err(dsi->dev, "wrong tx buf length %zu for long write\n",
+			msg->tx_len);
+		return -EINVAL;
+	}
+
+	while (DIV_ROUND_UP(len, pld_data_bytes)) {
+		if (len < pld_data_bytes) {
+			memcpy(&remainder, tx_buf, len);
+			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
+			len = 0;
+		} else {
+			dsi_write(dsi, DSI_GEN_PLD_DATA, *tx_buf);
+			tx_buf++;
+			len -= pld_data_bytes;
+		}
+
+		ret = readx_poll_timeout(readl, dsi->base + DSI_CMD_PKT_STATUS,
+					 val, !(val & GEN_PLD_W_FULL), 1000,
+					 CMD_PKT_STATUS_TIMEOUT_US);
+		if (ret < 0) {
+			dev_err(dsi->dev,
+				"failed to get available write payload FIFO\n");
+			return ret;
+		}
+	}
+
+	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, val);
+}
+
+static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
+					 const struct mipi_dsi_msg *msg)
+{
+	struct dw_mipi_dsi *dsi = host_to_dsi(host);
+	int ret;
+
+	switch (msg->type) {
+	case MIPI_DSI_DCS_SHORT_WRITE:
+	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
+	case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
+		ret = dw_mipi_dsi_dcs_short_write(dsi, msg);
+		break;
+	case MIPI_DSI_DCS_LONG_WRITE:
+		ret = dw_mipi_dsi_dcs_long_write(dsi, msg);
+		break;
+	default:
+		dev_err(dsi->dev, "unsupported message type\n");
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = {
+	.attach = dw_mipi_dsi_host_attach,
+	.detach = dw_mipi_dsi_host_detach,
+	.transfer = dw_mipi_dsi_host_transfer,
+};
+
+static enum drm_connector_status
+dw_mipi_dsi_detect(struct drm_connector *connector, bool force)
+{
+	return connector_status_connected;
+}
+
+static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_unregister(connector);
+	drm_connector_cleanup(connector);
+}
+
+static struct drm_connector_funcs dw_mipi_dsi_connector_funcs = {
+	.dpms = drm_helper_connector_dpms,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.detect = dw_mipi_dsi_detect,
+	.destroy = dw_mipi_dsi_drm_connector_destroy,
+};
+
+static int dw_mipi_dsi_connector_get_modes(struct drm_connector *connector)
+{
+	struct dw_mipi_dsi *dsi = con_to_dsi(connector);
+
+	return drm_panel_get_modes(dsi->panel);
+}
+
+static enum drm_mode_status dw_mipi_dsi_mode_valid(
+					struct drm_connector *connector,
+					struct drm_display_mode *mode)
+{
+	struct dw_mipi_dsi *dsi = con_to_dsi(connector);
+
+	enum drm_mode_status mode_status = MODE_OK;
+
+	if (dsi->pdata->mode_valid)
+		mode_status = dsi->pdata->mode_valid(connector, mode);
+
+	return mode_status;
+}
+
+static struct drm_encoder *dw_mipi_dsi_connector_best_encoder(
+					struct drm_connector *connector)
+{
+	struct dw_mipi_dsi *dsi = con_to_dsi(connector);
+
+	return dsi->bridge->encoder;
+}
+
+static struct drm_connector_helper_funcs dw_mipi_dsi_connector_helper_funcs = {
+	.get_modes = dw_mipi_dsi_connector_get_modes,
+	.mode_valid = dw_mipi_dsi_mode_valid,
+	.best_encoder = dw_mipi_dsi_connector_best_encoder,
+};
+
+static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
+{
+	u32 val;
+
+	val = VID_MODE_TYPE_BURST_SYNC_PULSES | ENABLE_LOW_POWER;
+
+	dsi_write(dsi, DSI_VID_MODE_CFG, val);
+}
+
+static void dw_mipi_dsi_set_mode(struct dw_mipi_dsi *dsi,
+				 enum dw_mipi_dsi_mode mode)
+{
+	if (mode == DW_MIPI_DSI_CMD_MODE) {
+		dsi_write(dsi, DSI_PWR_UP, RESET);
+		dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
+		dsi_write(dsi, DSI_PWR_UP, POWERUP);
+	} else {
+		dsi_write(dsi, DSI_PWR_UP, RESET);
+		dsi_write(dsi, DSI_MODE_CFG, ENABLE_VIDEO_MODE);
+		dw_mipi_dsi_video_mode_config(dsi);
+		dsi_write(dsi, DSI_PWR_UP, POWERUP);
+	}
+}
+
+static void dw_mipi_dsi_disable(struct dw_mipi_dsi *dsi)
+{
+	dsi_write(dsi, DSI_PWR_UP, RESET);
+	dsi_write(dsi, DSI_PHY_RSTZ, PHY_RSTZ);
+}
+
+static void dw_mipi_dsi_bridge_enable(struct drm_bridge *bridge)
+{
+	struct dw_mipi_dsi *dsi = bridge->driver_private;
+
+	if (dsi->enabled)
+		return;
+
+	if (clk_prepare_enable(dsi->pclk)) {
+		dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__);
+		return;
+	}
+
+	dw_mipi_dsi_phy_init(dsi);
+	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
+	dw_mipi_dsi_wait_for_two_frames(dsi);
+	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
+	if (drm_panel_prepare(dsi->panel)) {
+		dev_err(dsi->dev, "failed to prepare panel\n");
+		return;
+	}
+
+	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
+	clk_disable_unprepare(dsi->pclk);
+
+	drm_panel_enable(dsi->panel);
+
+	dsi->enabled = true;
+}
+
+static void dw_mipi_dsi_bridge_disable(struct drm_bridge *bridge)
+{
+	struct dw_mipi_dsi *dsi = bridge->driver_private;
+
+	if (!dsi->enabled)
+		return;
+
+	drm_panel_disable(dsi->panel);
+
+	if (clk_prepare_enable(dsi->pclk)) {
+		dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__);
+		return;
+	}
+
+	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
+	drm_panel_unprepare(dsi->panel);
+	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
+
+	/*
+	 * This is necessary to make sure the peripheral will be driven
+	 * normally when the display is enabled again later.
+	 */
+	msleep(120);
+
+	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
+	dw_mipi_dsi_disable(dsi);
+	clk_disable_unprepare(dsi->pclk);
+
+	dsi->enabled = false;
+}
+
+static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
+{
+	dsi_write(dsi, DSI_PWR_UP, RESET);
+	dsi_write(dsi, DSI_PHY_RSTZ, PHY_DISFORCEPLL | PHY_DISABLECLK
+		  | PHY_RSTZ | PHY_SHUTDOWNZ);
+	dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVIDSION(10) |
+		  TX_ESC_CLK_DIVIDSION(7));
+	dsi_write(dsi, DSI_LPCLK_CTRL, PHY_TXREQUESTCLKHS);
+}
+
+static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
+				   struct drm_display_mode *mode)
+{
+	u32 val = 0, color = 0;
+
+	switch (dsi->format) {
+	case MIPI_DSI_FMT_RGB888:
+		color = DPI_COLOR_CODING_24BIT;
+		break;
+	case MIPI_DSI_FMT_RGB666:
+		color = DPI_COLOR_CODING_18BIT_2 | EN18_LOOSELY;
+		break;
+	case MIPI_DSI_FMT_RGB666_PACKED:
+		color = DPI_COLOR_CODING_18BIT_1;
+		break;
+	case MIPI_DSI_FMT_RGB565:
+		color = DPI_COLOR_CODING_16BIT_1;
+		break;
+	}
+
+	if (!(mode->flags & DRM_MODE_FLAG_PVSYNC))
+		val |= VSYNC_ACTIVE_LOW;
+	if (!(mode->flags & DRM_MODE_FLAG_PHSYNC))
+		val |= HSYNC_ACTIVE_LOW;
+
+	dsi_write(dsi, DSI_DPI_VCID, DPI_VID(dsi->channel));
+	dsi_write(dsi, DSI_DPI_COLOR_CODING, color);
+	dsi_write(dsi, DSI_DPI_CFG_POL, val);
+	dsi_write(dsi, DSI_DPI_LP_CMD_TIM, OUTVACT_LPCMD_TIME(4)
+		  | INVACT_LPCMD_TIME(4));
+}
+
+static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
+{
+	dsi_write(dsi, DSI_PCKHDL_CFG, EN_CRC_RX | EN_ECC_RX | EN_BTA);
+}
+
+static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
+					    struct drm_display_mode *mode)
+{
+	dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(mode->hdisplay));
+}
+
+static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
+{
+	dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000));
+	dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00);
+	dsi_write(dsi, DSI_CMD_MODE_CFG, CMD_MODE_ALL_LP);
+	dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
+}
+
+/* Get lane byte clock cycles. */
+static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi,
+					   u32 hcomponent)
+{
+	u32 frac, lbcc;
+
+	lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8;
+
+	frac = lbcc % dsi->mode->clock;
+	lbcc = lbcc / dsi->mode->clock;
+	if (frac)
+		lbcc++;
+
+	return lbcc;
+}
+
+static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi)
+{
+	u32 htotal, hsa, hbp, lbcc;
+	struct drm_display_mode *mode = dsi->mode;
+
+	htotal = mode->htotal;
+	hsa = mode->hsync_end - mode->hsync_start;
+	hbp = mode->htotal - mode->hsync_end;
+
+	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, htotal);
+	dsi_write(dsi, DSI_VID_HLINE_TIME, lbcc);
+
+	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, hsa);
+	dsi_write(dsi, DSI_VID_HSA_TIME, lbcc);
+
+	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, hbp);
+	dsi_write(dsi, DSI_VID_HBP_TIME, lbcc);
+}
+
+static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi)
+{
+	u32 vactive, vsa, vfp, vbp;
+	struct drm_display_mode *mode = dsi->mode;
+
+	vactive = mode->vdisplay;
+	vsa = mode->vsync_end - mode->vsync_start;
+	vfp = mode->vsync_start - mode->vdisplay;
+	vbp = mode->vtotal - mode->vsync_end;
+
+	dsi_write(dsi, DSI_VID_VACTIVE_LINES, vactive);
+	dsi_write(dsi, DSI_VID_VSA_LINES, vsa);
+	dsi_write(dsi, DSI_VID_VFP_LINES, vfp);
+	dsi_write(dsi, DSI_VID_VBP_LINES, vbp);
+}
+
+static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
+{
+	dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME(0x40)
+		  | PHY_LP2HS_TIME(0x40) | MAX_RD_TIME(10000));
+
+	dsi_write(dsi, DSI_PHY_TMR_LPCLK_CFG, PHY_CLKHS2LP_TIME(0x40)
+		  | PHY_CLKLP2HS_TIME(0x40));
+}
+
+static void dw_mipi_dsi_dphy_interface_config(struct dw_mipi_dsi *dsi)
+{
+	dsi_write(dsi, DSI_PHY_IF_CFG, PHY_STOP_WAIT_TIME(0x20) |
+		  N_LANES(dsi->lanes));
+}
+
+static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi)
+{
+	dsi_read(dsi, DSI_INT_ST0);
+	dsi_read(dsi, DSI_INT_ST1);
+	dsi_write(dsi, DSI_INT_MSK0, 0);
+	dsi_write(dsi, DSI_INT_MSK1, 0);
+}
+
+static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge,
+					struct drm_display_mode *mode,
+					struct drm_display_mode *adjusted_mode)
+{
+	struct dw_mipi_dsi *dsi = bridge->driver_private;
+	int ret;
+
+	dsi->mode = adjusted_mode;
+
+	ret = dw_mipi_dsi_get_lane_bps(dsi);
+	if (ret < 0)
+		return;
+
+	if (clk_prepare_enable(dsi->pclk)) {
+		dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__);
+		return;
+	}
+
+	dw_mipi_dsi_init(dsi);
+	dw_mipi_dsi_dpi_config(dsi, mode);
+	dw_mipi_dsi_packet_handler_config(dsi);
+	dw_mipi_dsi_video_mode_config(dsi);
+	dw_mipi_dsi_video_packet_config(dsi, mode);
+	dw_mipi_dsi_command_mode_config(dsi);
+	dw_mipi_dsi_line_timer_config(dsi);
+	dw_mipi_dsi_vertical_timing_config(dsi);
+	dw_mipi_dsi_dphy_timing_config(dsi);
+	dw_mipi_dsi_dphy_interface_config(dsi);
+	dw_mipi_dsi_clear_err(dsi);
+	dw_mipi_dsi_phy_init(dsi);
+	dw_mipi_dsi_wait_for_two_frames(dsi);
+	if (drm_panel_prepare(dsi->panel)) {
+		dev_err(dsi->dev, "failed to prepare panel\n");
+		return;
+	}
+
+	clk_disable_unprepare(dsi->pclk);
+}
+
+static bool dw_mipi_dsi_bridge_mode_fixup(struct drm_bridge *bridge,
+					const struct drm_display_mode *mode,
+					struct drm_display_mode *adjusted_mode)
+{
+	return true;
+}
+
+static const struct drm_bridge_funcs dw_mipi_dsi_bridge_funcs = {
+	.enable = dw_mipi_dsi_bridge_enable,
+	.disable = dw_mipi_dsi_bridge_disable,
+	.mode_set = dw_mipi_dsi_bridge_mode_set,
+	.mode_fixup = dw_mipi_dsi_bridge_mode_fixup,
+};
+
+static int dw_mipi_dsi_register(struct drm_device *drm, struct dw_mipi_dsi *dsi,
+				struct drm_encoder *encoder)
+{
+	struct drm_bridge *bridge;
+	int ret;
+
+	bridge = devm_kzalloc(drm->dev, sizeof(*bridge), GFP_KERNEL);
+	if (!bridge)
+		return -ENOMEM;
+
+	dsi->bridge = bridge;
+	encoder->bridge = bridge;
+	bridge->driver_private = dsi;
+	bridge->encoder = encoder;
+
+	bridge->funcs = &dw_mipi_dsi_bridge_funcs;
+	ret = drm_bridge_attach(drm, bridge);
+	if (ret) {
+		DRM_ERROR("failed to initialize bridge with drm\n");
+		return ret;
+	}
+
+
+	drm_connector_helper_add(&dsi->connector,
+			&dw_mipi_dsi_connector_helper_funcs);
+	drm_connector_init(drm, &dsi->connector, &dw_mipi_dsi_connector_funcs,
+			   DRM_MODE_CONNECTOR_DSI);
+
+	drm_mode_connector_attach_encoder(&dsi->connector, encoder);
+
+	return 0;
+}
+
+int dw_mipi_dsi_bind(struct device *dev, struct device *master, void *data,
+		     struct drm_encoder *encoder,
+		     const struct dw_mipi_dsi_plat_data *pdata)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct resource *res;
+	struct drm_device *drm = data;
+	struct dw_mipi_dsi *dsi;
+	u32 val;
+	int ret;
+
+	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
+	if (!dsi)
+		return -ENOMEM;
+
+	dsi->pdata = pdata;
+	dsi->dev = dev;
+	dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
+	dsi->dsi_host.dev = dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	dsi->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(dsi->base))
+		return PTR_ERR(dsi->base);
+
+	dsi->pllref_clk = devm_clk_get(dev, "ref");
+	if (IS_ERR(dsi->pllref_clk)) {
+		ret = PTR_ERR(dsi->pllref_clk);
+		dev_err(dev, "Unable to get pll reference clock: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(dsi->pllref_clk);
+	if (ret) {
+		dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
+		return ret;
+	}
+
+	dsi->pclk = devm_clk_get(dev, "pclk");
+	if (IS_ERR(dsi->pclk)) {
+		ret = PTR_ERR(dsi->pclk);
+		dev_err(dev, "Unable to get pclk: %d\n", ret);
+		goto err_pllref;
+	}
+
+	ret = clk_prepare_enable(dsi->pclk);
+	if (ret) {
+		dev_err(dev, "%s: Failed to enable pclk\n", __func__);
+		return ret;
+	}
+
+	val = dsi_read(dsi, DSI_VERSION);
+	clk_disable_unprepare(dsi->pclk);
+
+	ret = dw_mipi_dsi_register(drm, dsi, encoder);
+	if (ret) {
+		dev_err(dev, "Unable to register dsi: %d\n", ret);
+		goto err_pllref;
+	}
+	dev_set_drvdata(dev, dsi);
+
+	return mipi_dsi_host_register(&dsi->dsi_host);
+
+err_pllref:
+	clk_disable_unprepare(dsi->pllref_clk);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind);
+
+void dw_mipi_dsi_unbind(struct device *dev, struct device *master, void *data)
+{
+	struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
+
+	mipi_dsi_host_unregister(&dsi->dsi_host);
+	clk_disable_unprepare(dsi->pllref_clk);
+}
+EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind);
+
+MODULE_DESCRIPTION("Synopsys DesignWare MIPI DSI host controller driver");
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/drm/bridge/dw_mipi_dsi.h b/include/drm/bridge/dw_mipi_dsi.h
new file mode 100644
index 0000000..991c065
--- /dev/null
+++ b/include/drm/bridge/dw_mipi_dsi.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ */
+
+#ifndef __DW_MIPI_DSI__
+#define __DW_MIPI_DSI__
+
+#include <drm/drmP.h>
+
+struct dw_mipi_dsi_plat_data {
+	unsigned int max_data_lanes;
+	enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
+					   struct drm_display_mode *mode);
+};
+
+int dw_mipi_dsi_get_encoder_pixel_format(struct drm_encoder *encoder);
+
+int dw_mipi_dsi_bind(struct device *dev, struct device *master,
+		     void *data, struct drm_encoder *encoder,
+		     const struct dw_mipi_dsi_plat_data *pdata);
+void dw_mipi_dsi_unbind(struct device *dev, struct device *master, void *data);
+
+#endif	/* __DW_MIPI_DSI__ */