drm/rockchip: dsi: migrate to use dw-mipi-dsi bridge driver

Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
MIPI DSI host controller bridge and remove the old separate one.

changes:

v2:
   add err_pllref, remove unnecessary encoder.enable & disable
   correct spelling mistakes
v3:
   call dw_mipi_dsi_unbind() in dw_mipi_dsi_rockchip_unbind()
   fix typo, use of_device_get_match_data(),
   change some bind() logic into probe()
   add 'dev_set_drvdata()'
v4:
  return -EINVAL when can not get best_freq
  add a clarifying comment when get vco
  add review tag
v5:
  keep our power domain enabled while touching GRF
v6:
  change func name dw_mipi_encoder_disable to
  dw_mipi_dsi_encoder_disable
v7:
  none
v8: Heiko
  add Archit's Review tag
  adapt to recent changes in the original rockchip-dsi driver
  beautify grf-handling
  split hw-setup (resources, dsi-host) from bind into probe
v2-new: Heiko
  add SPDX header instead of license blurb
  drop old versioning to not confuse people
v3-new: Heiko
  include ordering
  moved hwaccess from mode_set to enable callback
  move pllref_clk enablement to bind (needed by bridge mode_set->lane_mbps)
v4-new: Heiko
  rebase against recent rockchip-dsi changes
  move to call component_add in the new glue host-attach
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001123845.11818-6-heiko@sntech.de

drivers/gpu/drm/rockchip/Kconfig

@@ -7,7 +7,7 @@ config DRM_ROCKCHIP
 	select VIDEOMODE_HELPERS
 	select DRM_ANALOGIX_DP if ROCKCHIP_ANALOGIX_DP
 	select DRM_DW_HDMI if ROCKCHIP_DW_HDMI
-	select DRM_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
+	select DRM_DW_MIPI_DSI if ROCKCHIP_DW_MIPI_DSI
 	select DRM_RGB if ROCKCHIP_RGB
 	select SND_SOC_HDMI_CODEC if ROCKCHIP_CDN_DP && SND_SOC
 	help

drivers/gpu/drm/rockchip/Makefile

@@ -11,7 +11,7 @@ rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
 rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
 rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
 rockchipdrm-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
-rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
+rockchipdrm-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi-rockchip.o
 rockchipdrm-$(CONFIG_ROCKCHIP_INNO_HDMI) += inno_hdmi.o
 rockchipdrm-$(CONFIG_ROCKCHIP_LVDS) += rockchip_lvds.o
 rockchipdrm-$(CONFIG_ROCKCHIP_RGB) += rockchip_rgb.o

drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:
+ *      Chris Zhong <zyw@rock-chips.com>
+ *      Nickey Yang <nickey.yang@rock-chips.com>
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/bridge/dw_mipi_dsi.h>
+#include <drm/drm_of.h>
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/math64.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <video/mipi_display.h>
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_vop.h"
+
+#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_3UA	0x1
+#define CP_CURRENT_4_5UA	0x2
+#define CP_CURRENT_7_5UA	0x6
+#define CP_CURRENT_6UA	0x9
+#define CP_CURRENT_12UA	0xb
+#define CP_CURRENT_SEL(val)	((val) & 0xf)
+#define CP_PROGRAM_EN		BIT(7)
+
+#define LPF_RESISTORS_15_5KOHM	0x1
+#define LPF_RESISTORS_13KOHM	0x2
+#define LPF_RESISTORS_11_5KOHM	0x4
+#define LPF_RESISTORS_10_5KOHM	0x8
+#define LPF_RESISTORS_8KOHM	0x10
+#define LPF_PROGRAM_EN		BIT(6)
+#define LPF_RESISTORS_SEL(val)	((val) & 0x3f)
+
+#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) & 0xf)
+#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)
+
+#define PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL		0x10
+#define PLL_CP_CONTROL_PLL_LOCK_BYPASS			0x11
+#define PLL_LPF_AND_CP_CONTROL				0x12
+#define PLL_INPUT_DIVIDER_RATIO				0x17
+#define PLL_LOOP_DIVIDER_RATIO				0x18
+#define PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL	0x19
+#define BANDGAP_AND_BIAS_CONTROL			0x20
+#define TERMINATION_RESISTER_CONTROL			0x21
+#define AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY		0x22
+#define HS_RX_CONTROL_OF_LANE_0				0x44
+#define HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL	0x60
+#define HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL	0x61
+#define HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL	0x62
+#define HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL	0x63
+#define HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL	0x64
+#define HS_TX_CLOCK_LANE_POST_TIME_CONTROL		0x65
+#define HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL	0x70
+#define HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL	0x71
+#define HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL	0x72
+#define HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL	0x73
+#define HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL		0x74
+
+#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
+#define DW_MIPI_NEEDS_GRF_CLK		BIT(1)
+
+#define RK3288_GRF_SOC_CON6		0x025c
+#define RK3288_DSI0_LCDC_SEL		BIT(6)
+#define RK3288_DSI1_LCDC_SEL		BIT(9)
+
+#define RK3399_GRF_SOC_CON20		0x6250
+#define RK3399_DSI0_LCDC_SEL		BIT(0)
+#define RK3399_DSI1_LCDC_SEL		BIT(4)
+
+#define RK3399_GRF_SOC_CON22		0x6258
+#define RK3399_DSI0_TURNREQUEST		(0xf << 12)
+#define RK3399_DSI0_TURNDISABLE		(0xf << 8)
+#define RK3399_DSI0_FORCETXSTOPMODE	(0xf << 4)
+#define RK3399_DSI0_FORCERXMODE		(0xf << 0)
+
+#define RK3399_GRF_SOC_CON23		0x625c
+#define RK3399_DSI1_TURNDISABLE		(0xf << 12)
+#define RK3399_DSI1_FORCETXSTOPMODE	(0xf << 8)
+#define RK3399_DSI1_FORCERXMODE		(0xf << 4)
+#define RK3399_DSI1_ENABLE		(0xf << 0)
+
+#define RK3399_GRF_SOC_CON24		0x6260
+#define RK3399_TXRX_MASTERSLAVEZ	BIT(7)
+#define RK3399_TXRX_ENABLECLK		BIT(6)
+#define RK3399_TXRX_BASEDIR		BIT(5)
+
+#define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
+
+#define to_dsi(nm)	container_of(nm, struct dw_mipi_dsi_rockchip, nm)
+
+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 rockchip_dw_dsi_chip_data {
+	u32 reg;
+
+	u32 lcdsel_grf_reg;
+	u32 lcdsel_big;
+	u32 lcdsel_lit;
+
+	u32 enable_grf_reg;
+	u32 enable;
+
+	u32 lanecfg1_grf_reg;
+	u32 lanecfg1;
+	u32 lanecfg2_grf_reg;
+	u32 lanecfg2;
+
+	unsigned int flags;
+	unsigned int max_data_lanes;
+};
+
+struct dw_mipi_dsi_rockchip {
+	struct device *dev;
+	struct drm_encoder encoder;
+	void __iomem *base;
+
+	struct regmap *grf_regmap;
+	struct clk *pllref_clk;
+	struct clk *grf_clk;
+	struct clk *phy_cfg_clk;
+
+	unsigned int lane_mbps; /* per lane */
+	u16 input_div;
+	u16 feedback_div;
+	u32 format;
+
+	struct dw_mipi_dsi *dmd;
+	const struct rockchip_dw_dsi_chip_data *cdata;
+	struct dw_mipi_dsi_plat_data pdata;
+};
+
+struct dphy_pll_parameter_map {
+	unsigned int max_mbps;
+	u8 hsfreqrange;
+	u8 icpctrl;
+	u8 lpfctrl;
+};
+
+/* The table is based on 27MHz DPHY pll reference clock. */
+static const struct dphy_pll_parameter_map dppa_map[] = {
+	{  89, 0x00, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
+	{  99, 0x10, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
+	{ 109, 0x20, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
+	{ 129, 0x01, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 139, 0x11, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 149, 0x21, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 169, 0x02, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
+	{ 179, 0x12, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
+	{ 199, 0x22, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
+	{ 219, 0x03, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
+	{ 239, 0x13, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
+	{ 249, 0x23, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
+	{ 269, 0x04, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
+	{ 299, 0x14, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
+	{ 329, 0x05, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 359, 0x15, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 399, 0x25, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
+	{ 449, 0x06, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 499, 0x16, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 549, 0x07, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
+	{ 599, 0x17, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
+	{ 649, 0x08, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 699, 0x18, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 749, 0x09, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 799, 0x19, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 849, 0x29, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 899, 0x39, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
+	{ 949, 0x0a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
+	{ 999, 0x1a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
+	{1049, 0x2a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
+	{1099, 0x3a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
+	{1149, 0x0b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1199, 0x1b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1249, 0x2b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1299, 0x3b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1349, 0x0c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1399, 0x1c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1449, 0x2c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
+	{1500, 0x3c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM }
+};
+
+static int max_mbps_to_parameter(unsigned int max_mbps)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dppa_map); i++)
+		if (dppa_map[i].max_mbps >= max_mbps)
+			return i;
+
+	return -EINVAL;
+}
+
+static inline void dsi_write(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 val)
+{
+	writel(val, dsi->base + reg);
+}
+
+static inline u32 dsi_read(struct dw_mipi_dsi_rockchip *dsi, u32 reg)
+{
+	return readl(dsi->base + reg);
+}
+
+static inline void dsi_set(struct dw_mipi_dsi_rockchip *dsi, u32 reg, u32 mask)
+{
+	dsi_write(dsi, reg, dsi_read(dsi, reg) | mask);
+}
+
+static inline void dsi_update_bits(struct dw_mipi_dsi_rockchip *dsi, u32 reg,
+				   u32 mask, u32 val)
+{
+	dsi_write(dsi, reg, (dsi_read(dsi, reg) & ~mask) | val);
+}
+
+static void dw_mipi_dsi_phy_write(struct dw_mipi_dsi_rockchip *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);
+}
+
+/**
+ * ns2bc - Nanoseconds to byte clock cycles
+ */
+static inline unsigned int ns2bc(struct dw_mipi_dsi_rockchip *dsi, int ns)
+{
+	return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
+}
+
+/**
+ * ns2ui - Nanoseconds to UI time periods
+ */
+static inline unsigned int ns2ui(struct dw_mipi_dsi_rockchip *dsi, int ns)
+{
+	return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
+}
+
+static int dw_mipi_dsi_phy_init(void *priv_data)
+{
+	struct dw_mipi_dsi_rockchip *dsi = priv_data;
+	int ret, i, vco;
+
+	/*
+	 * Get vco from frequency(lane_mbps)
+	 * vco	frequency table
+	 * 000 - between   80 and  200 MHz
+	 * 001 - between  200 and  300 MHz
+	 * 010 - between  300 and  500 MHz
+	 * 011 - between  500 and  700 MHz
+	 * 100 - between  700 and  900 MHz
+	 * 101 - between  900 and 1100 MHz
+	 * 110 - between 1100 and 1300 MHz
+	 * 111 - between 1300 and 1500 MHz
+	 */
+	vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
+
+	i = max_mbps_to_parameter(dsi->lane_mbps);
+	if (i < 0) {
+		DRM_DEV_ERROR(dsi->dev,
+			      "failed to get parameter for %dmbps clock\n",
+			      dsi->lane_mbps);
+		return i;
+	}
+
+	ret = clk_prepare_enable(dsi->phy_cfg_clk);
+	if (ret) {
+		DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
+		return ret;
+	}
+
+	dw_mipi_dsi_phy_write(dsi, PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL,
+			      BYPASS_VCO_RANGE |
+			      VCO_RANGE_CON_SEL(vco) |
+			      VCO_IN_CAP_CON_LOW |
+			      REF_BIAS_CUR_SEL);
+
+	dw_mipi_dsi_phy_write(dsi, PLL_CP_CONTROL_PLL_LOCK_BYPASS,
+			      CP_CURRENT_SEL(dppa_map[i].icpctrl));
+	dw_mipi_dsi_phy_write(dsi, PLL_LPF_AND_CP_CONTROL,
+			      CP_PROGRAM_EN | LPF_PROGRAM_EN |
+			      LPF_RESISTORS_SEL(dppa_map[i].lpfctrl));
+
+	dw_mipi_dsi_phy_write(dsi, HS_RX_CONTROL_OF_LANE_0,
+			      HSFREQRANGE_SEL(dppa_map[i].hsfreqrange));
+
+	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_DIVIDER_RATIO,
+			      INPUT_DIVIDER(dsi->input_div));
+	dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
+			      LOOP_DIV_LOW_SEL(dsi->feedback_div) |
+			      LOW_PROGRAM_EN);
+	/*
+	 * We need set PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL immediately
+	 * to make the configured LSB effective according to IP simulation
+	 * and lab test results.
+	 * Only in this way can we get correct mipi phy pll frequency.
+	 */
+	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
+			      PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+	dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
+			      LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
+			      HIGH_PROGRAM_EN);
+	dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
+			      PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+
+	dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
+			      LOW_PROGRAM_EN | BIASEXTR_SEL(BIASEXTR_127_7));
+	dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
+			      HIGH_PROGRAM_EN | BANDGAP_SEL(BANDGAP_96_10));
+
+	dw_mipi_dsi_phy_write(dsi, BANDGAP_AND_BIAS_CONTROL,
+			      POWER_CONTROL | INTERNAL_REG_CURRENT |
+			      BIAS_BLOCK_ON | BANDGAP_ON);
+
+	dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
+			      TER_RESISTOR_LOW | TER_CAL_DONE |
+			      SETRD_MAX | TER_RESISTORS_ON);
+	dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
+			      TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
+			      SETRD_MAX | POWER_MANAGE |
+			      TER_RESISTORS_ON);
+
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL,
+			      TLP_PROGRAM_EN | ns2bc(dsi, 500));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL,
+			      THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL,
+			      THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL,
+			      THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL,
+			      BIT(5) | ns2bc(dsi, 100));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_POST_TIME_CONTROL,
+			      BIT(5) | (ns2bc(dsi, 60) + 7));
+
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL,
+			      TLP_PROGRAM_EN | ns2bc(dsi, 500));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL,
+			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 20));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL,
+			      THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL,
+			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
+	dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL,
+			      BIT(5) | ns2bc(dsi, 100));
+
+	clk_disable_unprepare(dsi->phy_cfg_clk);
+
+	return ret;
+}
+
+static int
+dw_mipi_dsi_get_lane_mbps(void *priv_data, struct drm_display_mode *mode,
+			  unsigned long mode_flags, u32 lanes, u32 format,
+			  unsigned int *lane_mbps)
+{
+	struct dw_mipi_dsi_rockchip *dsi = priv_data;
+	int bpp;
+	unsigned long mpclk, tmp;
+	unsigned int target_mbps = 1000;
+	unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
+	unsigned long best_freq = 0;
+	unsigned long fvco_min, fvco_max, fin, fout;
+	unsigned int min_prediv, max_prediv;
+	unsigned int _prediv, uninitialized_var(best_prediv);
+	unsigned long _fbdiv, uninitialized_var(best_fbdiv);
+	unsigned long min_delta = ULONG_MAX;
+
+	dsi->format = format;
+	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
+	if (bpp < 0) {
+		DRM_DEV_ERROR(dsi->dev,
+			      "failed to get bpp for pixel format %d\n",
+			      dsi->format);
+		return bpp;
+	}
+
+	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
+	if (mpclk) {
+		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
+		tmp = mpclk * (bpp / lanes) * 10 / 8;
+		if (tmp < max_mbps)
+			target_mbps = tmp;
+		else
+			DRM_DEV_ERROR(dsi->dev,
+				      "DPHY clock frequency is out of range\n");
+	}
+
+	fin = clk_get_rate(dsi->pllref_clk);
+	fout = target_mbps * USEC_PER_SEC;
+
+	/* constraint: 5Mhz <= Fref / N <= 40MHz */
+	min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
+	max_prediv = fin / (5 * USEC_PER_SEC);
+
+	/* constraint: 80MHz <= Fvco <= 1500Mhz */
+	fvco_min = 80 * USEC_PER_SEC;
+	fvco_max = 1500 * USEC_PER_SEC;
+
+	for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
+		u64 tmp;
+		u32 delta;
+		/* Fvco = Fref * M / N */
+		tmp = (u64)fout * _prediv;
+		do_div(tmp, fin);
+		_fbdiv = tmp;
+		/*
+		 * Due to the use of a "by 2 pre-scaler," the range of the
+		 * feedback multiplication value M is limited to even division
+		 * numbers, and m must be greater than 6, not bigger than 512.
+		 */
+		if (_fbdiv < 6 || _fbdiv > 512)
+			continue;
+
+		_fbdiv += _fbdiv % 2;
+
+		tmp = (u64)_fbdiv * fin;
+		do_div(tmp, _prediv);
+		if (tmp < fvco_min || tmp > fvco_max)
+			continue;
+
+		delta = abs(fout - tmp);
+		if (delta < min_delta) {
+			best_prediv = _prediv;
+			best_fbdiv = _fbdiv;
+			min_delta = delta;
+			best_freq = tmp;
+		}
+	}
+
+	if (best_freq) {
+		dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
+		*lane_mbps = dsi->lane_mbps;
+		dsi->input_div = best_prediv;
+		dsi->feedback_div = best_fbdiv;
+	} else {
+		DRM_DEV_ERROR(dsi->dev, "Can not find best_freq for DPHY\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_rockchip_phy_ops = {
+	.init = dw_mipi_dsi_phy_init,
+	.get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
+};
+
+static void dw_mipi_dsi_rockchip_config(struct dw_mipi_dsi_rockchip *dsi,
+					int mux)
+{
+	if (dsi->cdata->lcdsel_grf_reg)
+		regmap_write(dsi->grf_regmap, dsi->cdata->lcdsel_grf_reg,
+			mux ? dsi->cdata->lcdsel_lit : dsi->cdata->lcdsel_big);
+
+	if (dsi->cdata->lanecfg1_grf_reg)
+		regmap_write(dsi->grf_regmap, dsi->cdata->lanecfg1_grf_reg,
+					      dsi->cdata->lanecfg1);
+
+	if (dsi->cdata->lanecfg2_grf_reg)
+		regmap_write(dsi->grf_regmap, dsi->cdata->lanecfg2_grf_reg,
+					      dsi->cdata->lanecfg2);
+
+	if (dsi->cdata->enable_grf_reg)
+		regmap_write(dsi->grf_regmap, dsi->cdata->enable_grf_reg,
+					      dsi->cdata->enable);
+}
+
+static int
+dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
+				 struct drm_crtc_state *crtc_state,
+				 struct drm_connector_state *conn_state)
+{
+	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
+	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
+
+	switch (dsi->format) {
+	case MIPI_DSI_FMT_RGB888:
+		s->output_mode = ROCKCHIP_OUT_MODE_P888;
+		break;
+	case MIPI_DSI_FMT_RGB666:
+		s->output_mode = ROCKCHIP_OUT_MODE_P666;
+		break;
+	case MIPI_DSI_FMT_RGB565:
+		s->output_mode = ROCKCHIP_OUT_MODE_P565;
+		break;
+	default:
+		WARN_ON(1);
+		return -EINVAL;
+	}
+
+	s->output_type = DRM_MODE_CONNECTOR_DSI;
+
+	return 0;
+}
+
+static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
+{
+	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
+	int ret, mux;
+
+	mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node,
+						&dsi->encoder);
+	if (mux < 0)
+		return;
+
+	pm_runtime_get_sync(dsi->dev);
+
+	/*
+	 * For the RK3399, the clk of grf must be enabled before writing grf
+	 * register. And for RK3288 or other soc, this grf_clk must be NULL,
+	 * the clk_prepare_enable return true directly.
+	 */
+	ret = clk_prepare_enable(dsi->grf_clk);
+	if (ret) {
+		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
+		return;
+	}
+
+	dw_mipi_dsi_rockchip_config(dsi, mux);
+
+	clk_disable_unprepare(dsi->grf_clk);
+}
+
+static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
+{
+	struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
+
+	pm_runtime_put(dsi->dev);
+}
+
+static const struct drm_encoder_helper_funcs
+dw_mipi_dsi_encoder_helper_funcs = {
+	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
+	.enable = dw_mipi_dsi_encoder_enable,
+	.disable = dw_mipi_dsi_encoder_disable,
+};
+
+static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static int rockchip_dsi_drm_create_encoder(struct dw_mipi_dsi_rockchip *dsi,
+					   struct drm_device *drm_dev)
+{
+	struct drm_encoder *encoder = &dsi->encoder;
+	int ret;
+
+	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
+							     dsi->dev->of_node);
+
+	ret = drm_encoder_init(drm_dev, encoder, &dw_mipi_dsi_encoder_funcs,
+			       DRM_MODE_ENCODER_DSI, NULL);
+	if (ret) {
+		DRM_ERROR("Failed to initialize encoder with drm\n");
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &dw_mipi_dsi_encoder_helper_funcs);
+
+	return 0;
+}
+
+static int dw_mipi_dsi_rockchip_bind(struct device *dev,
+				     struct device *master,
+				     void *data)
+{
+	struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
+	struct drm_device *drm_dev = data;
+	int ret;
+
+	ret = clk_prepare_enable(dsi->pllref_clk);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "Failed to enable pllref_clk: %d\n", ret);
+		return ret;
+	}
+
+	ret = rockchip_dsi_drm_create_encoder(dsi, drm_dev);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "Failed to create drm encoder\n");
+		return ret;
+	}
+
+	ret = dw_mipi_dsi_bind(dsi->dmd, &dsi->encoder);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "Failed to bind: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void dw_mipi_dsi_rockchip_unbind(struct device *dev,
+					struct device *master,
+					void *data)
+{
+	struct dw_mipi_dsi_rockchip *dsi = dev_get_drvdata(dev);
+
+	dw_mipi_dsi_unbind(dsi->dmd);
+
+	clk_disable_unprepare(dsi->pllref_clk);
+}
+
+static const struct component_ops dw_mipi_dsi_rockchip_ops = {
+	.bind	= dw_mipi_dsi_rockchip_bind,
+	.unbind	= dw_mipi_dsi_rockchip_unbind,
+};
+
+static int dw_mipi_dsi_rockchip_host_attach(void *priv_data,
+					    struct mipi_dsi_device *device)
+{
+	struct dw_mipi_dsi_rockchip *dsi = priv_data;
+	int ret;
+
+	ret = component_add(dsi->dev, &dw_mipi_dsi_rockchip_ops);
+	if (ret) {
+		DRM_DEV_ERROR(dsi->dev, "Failed to register component: %d\n",
+					ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int dw_mipi_dsi_rockchip_host_detach(void *priv_data,
+					    struct mipi_dsi_device *device)
+{
+	struct dw_mipi_dsi_rockchip *dsi = priv_data;
+
+	component_del(dsi->dev, &dw_mipi_dsi_rockchip_ops);
+
+	return 0;
+}
+
+static const struct dw_mipi_dsi_host_ops dw_mipi_dsi_rockchip_host_ops = {
+	.attach = dw_mipi_dsi_rockchip_host_attach,
+	.detach = dw_mipi_dsi_rockchip_host_detach,
+};
+
+static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct dw_mipi_dsi_rockchip *dsi;
+	struct resource *res;
+	const struct rockchip_dw_dsi_chip_data *cdata =
+				of_device_get_match_data(dev);
+	int ret, i;
+
+	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
+	if (!dsi)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dsi->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(dsi->base)) {
+		DRM_DEV_ERROR(dev, "Unable to get dsi registers\n");
+		return PTR_ERR(dsi->base);
+	}
+
+	i = 0;
+	while (cdata[i].reg) {
+		if (cdata[i].reg == res->start) {
+			dsi->cdata = &cdata[i];
+			break;
+		}
+
+		i++;
+	}
+
+	if (!dsi->cdata) {
+		dev_err(dev, "no dsi-config for %s node\n", np->name);
+		return -EINVAL;
+	}
+
+	dsi->pllref_clk = devm_clk_get(dev, "ref");
+	if (IS_ERR(dsi->pllref_clk)) {
+		ret = PTR_ERR(dsi->pllref_clk);
+		DRM_DEV_ERROR(dev,
+			      "Unable to get pll reference clock: %d\n", ret);
+		return ret;
+	}
+
+	if (dsi->cdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
+		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
+		if (IS_ERR(dsi->phy_cfg_clk)) {
+			ret = PTR_ERR(dsi->phy_cfg_clk);
+			DRM_DEV_ERROR(dev,
+				      "Unable to get phy_cfg_clk: %d\n", ret);
+			return ret;
+		}
+	}
+
+	if (dsi->cdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
+		dsi->grf_clk = devm_clk_get(dev, "grf");
+		if (IS_ERR(dsi->grf_clk)) {
+			ret = PTR_ERR(dsi->grf_clk);
+			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
+			return ret;
+		}
+	}
+
+	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
+	if (IS_ERR(dsi->grf_regmap)) {
+		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
+		return PTR_ERR(dsi->grf_regmap);
+	}
+
+	dsi->dev = dev;
+	dsi->pdata.base = dsi->base;
+	dsi->pdata.max_data_lanes = dsi->cdata->max_data_lanes;
+	dsi->pdata.phy_ops = &dw_mipi_dsi_rockchip_phy_ops;
+	dsi->pdata.host_ops = &dw_mipi_dsi_rockchip_host_ops;
+	dsi->pdata.priv_data = dsi;
+	platform_set_drvdata(pdev, dsi);
+
+	dsi->dmd = dw_mipi_dsi_probe(pdev, &dsi->pdata);
+	if (IS_ERR(dsi->dmd)) {
+		ret = PTR_ERR(dsi->dmd);
+		if (ret != -EPROBE_DEFER)
+			DRM_DEV_ERROR(dev,
+				      "Failed to probe dw_mipi_dsi: %d\n", ret);
+		goto err_clkdisable;
+	}
+
+	return 0;
+
+err_clkdisable:
+	clk_disable_unprepare(dsi->pllref_clk);
+	return ret;
+}
+
+static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
+{
+	struct dw_mipi_dsi_rockchip *dsi = platform_get_drvdata(pdev);
+
+	dw_mipi_dsi_remove(dsi->dmd);
+
+	return 0;
+}
+
+static const struct rockchip_dw_dsi_chip_data rk3288_chip_data[] = {
+	{
+		.reg = 0xff960000,
+		.lcdsel_grf_reg = RK3288_GRF_SOC_CON6,
+		.lcdsel_big = HIWORD_UPDATE(0, RK3288_DSI0_LCDC_SEL),
+		.lcdsel_lit = HIWORD_UPDATE(RK3288_DSI0_LCDC_SEL, RK3288_DSI0_LCDC_SEL),
+
+		.max_data_lanes = 4,
+	},
+	{
+		.reg = 0xff964000,
+		.lcdsel_grf_reg = RK3288_GRF_SOC_CON6,
+		.lcdsel_big = HIWORD_UPDATE(0, RK3288_DSI1_LCDC_SEL),
+		.lcdsel_lit = HIWORD_UPDATE(RK3288_DSI1_LCDC_SEL, RK3288_DSI1_LCDC_SEL),
+
+		.max_data_lanes = 4,
+	},
+	{ /* sentinel */ }
+};
+
+static const struct rockchip_dw_dsi_chip_data rk3399_chip_data[] = {
+	{
+		.reg = 0xff960000,
+		.lcdsel_grf_reg = RK3399_GRF_SOC_CON20,
+		.lcdsel_big = HIWORD_UPDATE(0, RK3399_DSI0_LCDC_SEL),
+		.lcdsel_lit = HIWORD_UPDATE(RK3399_DSI0_LCDC_SEL,
+					    RK3399_DSI0_LCDC_SEL),
+
+		.lanecfg1_grf_reg = RK3399_GRF_SOC_CON22,
+		.lanecfg1 = HIWORD_UPDATE(0, RK3399_DSI0_TURNREQUEST |
+					     RK3399_DSI0_TURNDISABLE |
+					     RK3399_DSI0_FORCETXSTOPMODE |
+					     RK3399_DSI0_FORCERXMODE),
+
+		.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
+		.max_data_lanes = 4,
+	},
+	{
+		.reg = 0xff968000,
+		.lcdsel_grf_reg = RK3399_GRF_SOC_CON20,
+		.lcdsel_big = HIWORD_UPDATE(0, RK3399_DSI1_LCDC_SEL),
+		.lcdsel_lit = HIWORD_UPDATE(RK3399_DSI1_LCDC_SEL,
+					    RK3399_DSI1_LCDC_SEL),
+
+		.lanecfg1_grf_reg = RK3399_GRF_SOC_CON23,
+		.lanecfg1 = HIWORD_UPDATE(0, RK3399_DSI1_TURNDISABLE |
+					     RK3399_DSI1_FORCETXSTOPMODE |
+					     RK3399_DSI1_FORCERXMODE |
+					     RK3399_DSI1_ENABLE),
+
+		.lanecfg2_grf_reg = RK3399_GRF_SOC_CON24,
+		.lanecfg2 = HIWORD_UPDATE(RK3399_TXRX_MASTERSLAVEZ |
+					  RK3399_TXRX_ENABLECLK,
+					  RK3399_TXRX_MASTERSLAVEZ |
+					  RK3399_TXRX_ENABLECLK |
+					  RK3399_TXRX_BASEDIR),
+
+		.enable_grf_reg = RK3399_GRF_SOC_CON23,
+		.enable = HIWORD_UPDATE(RK3399_DSI1_ENABLE, RK3399_DSI1_ENABLE),
+
+		.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
+		.max_data_lanes = 4,
+	},
+	{ /* sentinel */ }
+};
+
+static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
+	{
+	 .compatible = "rockchip,rk3288-mipi-dsi",
+	 .data = &rk3288_chip_data,
+	}, {
+	 .compatible = "rockchip,rk3399-mipi-dsi",
+	 .data = &rk3399_chip_data,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dw_mipi_dsi_rockchip_dt_ids);
+
+struct platform_driver dw_mipi_dsi_rockchip_driver = {
+	.probe		= dw_mipi_dsi_rockchip_probe,
+	.remove		= dw_mipi_dsi_rockchip_remove,
+	.driver		= {
+		.of_match_table = dw_mipi_dsi_rockchip_dt_ids,
+		.name	= "dw-mipi-dsi-rockchip",
+	},
+};

drivers/gpu/drm/rockchip/dw-mipi-dsi.c

-/*
- * Copyright (c) 2016, 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/component.h>
-#include <linux/iopoll.h>
-#include <linux/math64.h>
-#include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/regmap.h>
-#include <linux/reset.h>
-#include <linux/mfd/syscon.h>
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_mipi_dsi.h>
-#include <drm/drm_of.h>
-#include <drm/drm_panel.h>
-#include <drm/drmP.h>
-#include <video/mipi_display.h>
-
-#include "rockchip_drm_drv.h"
-#include "rockchip_drm_vop.h"
-
-#define DRIVER_NAME    "dw-mipi-dsi"
-
-#define RK3288_GRF_SOC_CON6		0x025c
-#define RK3288_DSI0_SEL_VOP_LIT		BIT(6)
-#define RK3288_DSI1_SEL_VOP_LIT		BIT(9)
-
-#define RK3399_GRF_SOC_CON20		0x6250
-#define RK3399_DSI0_SEL_VOP_LIT		BIT(0)
-#define RK3399_DSI1_SEL_VOP_LIT		BIT(4)
-
-/* disable turnrequest, turndisable, forcetxstopmode, forcerxmode */
-#define RK3399_GRF_SOC_CON22		0x6258
-#define RK3399_GRF_DSI_MODE		0xffff0000
-
-#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_NON_BURST_SYNC_PULSES	0x0
-#define VID_MODE_TYPE_NON_BURST_SYNC_EVENTS	0x1
-#define VID_MODE_TYPE_BURST			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)
-
-#define DW_MIPI_NEEDS_PHY_CFG_CLK	BIT(0)
-#define DW_MIPI_NEEDS_GRF_CLK		BIT(1)
-
-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_plat_data {
-	u32 dsi0_en_bit;
-	u32 dsi1_en_bit;
-	u32 grf_switch_reg;
-	u32 grf_dsi0_mode;
-	u32 grf_dsi0_mode_reg;
-	unsigned int flags;
-	unsigned int max_data_lanes;
-};
-
-struct dw_mipi_dsi {
-	struct drm_encoder encoder;
-	struct drm_connector connector;
-	struct mipi_dsi_host dsi_host;
-	struct drm_panel *panel;
-	struct device *dev;
-	struct regmap *grf_regmap;
-	void __iomem *base;
-
-	struct clk *grf_clk;
-	struct clk *pllref_clk;
-	struct clk *pclk;
-	struct clk *phy_cfg_clk;
-
-	int dpms_mode;
-	unsigned int lane_mbps; /* per lane */
-	u32 channel;
-	u32 lanes;
-	u32 format;
-	u16 input_div;
-	u16 feedback_div;
-	unsigned long mode_flags;
-
-	const struct dw_mipi_dsi_plat_data *pdata;
-};
-
-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 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;
-}
-
-/*
- * The controller should generate 2 frames before
- * preparing the peripheral.
- */
-static void dw_mipi_dsi_wait_for_two_frames(struct drm_display_mode *mode)
-{
-	int refresh, two_frames;
-
-	refresh = drm_mode_vrefresh(mode);
-	two_frames = DIV_ROUND_UP(MSEC_PER_SEC, refresh) * 2;
-	msleep(two_frames);
-}
-
-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);
-}
-
-static inline struct dw_mipi_dsi *encoder_to_dsi(struct drm_encoder *encoder)
-{
-	return container_of(encoder, struct dw_mipi_dsi, encoder);
-}
-
-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);
-}
-
-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);
-}
-
-/**
- * ns2bc - Nanoseconds to byte clock cycles
- */
-static inline unsigned int ns2bc(struct dw_mipi_dsi *dsi, int ns)
-{
-	return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
-}
-
-/**
- * ns2ui - Nanoseconds to UI time periods
- */
-static inline unsigned int ns2ui(struct dw_mipi_dsi *dsi, int ns)
-{
-	return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
-}
-
-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) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "failed to get testdin for %dmbps lane clock\n",
-			      dsi->lane_mbps);
-		return testdin;
-	}
-
-	/* Start by clearing PHY state */
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
-	dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
-
-	ret = clk_prepare_enable(dsi->phy_cfg_clk);
-	if (ret) {
-		DRM_DEV_ERROR(dsi->dev, "Failed to enable phy_cfg_clk\n");
-		return ret;
-	}
-
-	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, 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, 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, 0x60, TLP_PROGRAM_EN | ns2bc(dsi, 500));
-	dw_mipi_dsi_phy_write(dsi, 0x61, THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
-	dw_mipi_dsi_phy_write(dsi, 0x62, THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
-	dw_mipi_dsi_phy_write(dsi, 0x63, THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
-	dw_mipi_dsi_phy_write(dsi, 0x64, BIT(5) | ns2bc(dsi, 100));
-	dw_mipi_dsi_phy_write(dsi, 0x65, BIT(5) | (ns2bc(dsi, 60) + 7));
-
-	dw_mipi_dsi_phy_write(dsi, 0x70, TLP_PROGRAM_EN | ns2bc(dsi, 500));
-	dw_mipi_dsi_phy_write(dsi, 0x71,
-			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 5));
-	dw_mipi_dsi_phy_write(dsi, 0x72,
-			      THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
-	dw_mipi_dsi_phy_write(dsi, 0x73,
-			      THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
-	dw_mipi_dsi_phy_write(dsi, 0x74, BIT(5) | ns2bc(dsi, 100));
-
-	dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
-				     PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
-
-	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
-				 val, val & LOCK, 1000, PHY_STATUS_TIMEOUT_US);
-	if (ret < 0) {
-		DRM_DEV_ERROR(dsi->dev, "failed to wait for phy lock state\n");
-		goto phy_init_end;
-	}
-
-	ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
-				 val, val & STOP_STATE_CLK_LANE, 1000,
-				 PHY_STATUS_TIMEOUT_US);
-	if (ret < 0)
-		DRM_DEV_ERROR(dsi->dev,
-			      "failed to wait for phy clk lane stop state\n");
-
-phy_init_end:
-	clk_disable_unprepare(dsi->phy_cfg_clk);
-
-	return ret;
-}
-
-static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
-				    struct drm_display_mode *mode)
-{
-	unsigned int 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;
-	int bpp;
-
-	bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
-	if (bpp < 0) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "failed to get bpp for pixel format %d\n",
-			      dsi->format);
-		return bpp;
-	}
-
-	mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
-	if (mpclk) {
-		/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
-		tmp = mpclk * (bpp / dsi->lanes) * 10 / 8;
-		if (tmp < max_mbps)
-			target_mbps = tmp;
-		else
-			DRM_DEV_ERROR(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;
-
-	/*
-	 * The limits on the PLL divisor are:
-	 *
-	 *	5MHz <= (pllref / n) <= 40MHz
-	 *
-	 * we walk over these values in descreasing order so that if we hit
-	 * an exact match for target_mbps it is more likely that "m" will be
-	 * even.
-	 *
-	 * TODO: ensure that "m" is even after this loop.
-	 */
-	for (i = pllref / 5; i > (pllref / 40); 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) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "the number of data lanes(%u) is too many\n",
-			      device->lanes);
-		return -EINVAL;
-	}
-
-	dsi->lanes = device->lanes;
-	dsi->channel = device->channel;
-	dsi->format = device->format;
-	dsi->mode_flags = device->mode_flags;
-	dsi->panel = of_drm_find_panel(device->dev.of_node);
-	if (!IS_ERR(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 void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
-				   const struct mipi_dsi_msg *msg)
-{
-	bool lpm = msg->flags & MIPI_DSI_MSG_USE_LPM;
-	u32 val = 0;
-
-	if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
-		val |= EN_ACK_RQST;
-	if (lpm)
-		val |= CMD_MODE_ALL_LP;
-
-	dsi_write(dsi, DSI_LPCLK_CTRL, lpm ? 0 : PHY_TXREQUESTCLKHS);
-	dsi_write(dsi, DSI_CMD_MODE_CFG, val);
-}
-
-static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
-{
-	int ret;
-	u32 val, mask;
-
-	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
-				 val, !(val & GEN_CMD_FULL), 1000,
-				 CMD_PKT_STATUS_TIMEOUT_US);
-	if (ret < 0) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "failed to get available command FIFO\n");
-		return ret;
-	}
-
-	dsi_write(dsi, DSI_GEN_HDR, hdr_val);
-
-	mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY;
-	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
-				 val, (val & mask) == mask,
-				 1000, CMD_PKT_STATUS_TIMEOUT_US);
-	if (ret < 0) {
-		DRM_DEV_ERROR(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 u8 *tx_buf = msg->tx_buf;
-	u16 data = 0;
-	u32 val;
-
-	if (msg->tx_len > 0)
-		data |= tx_buf[0];
-	if (msg->tx_len > 1)
-		data |= tx_buf[1] << 8;
-
-	if (msg->tx_len > 2) {
-		DRM_DEV_ERROR(dsi->dev,
-			      "too long tx buf length %zu for short write\n",
-			      msg->tx_len);
-		return -EINVAL;
-	}
-
-	val = GEN_HDATA(data) | GEN_HTYPE(msg->type);
-	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 u8 *tx_buf = msg->tx_buf;
-	int len = msg->tx_len, pld_data_bytes = sizeof(u32), ret;
-	u32 hdr_val = GEN_HDATA(msg->tx_len) | GEN_HTYPE(msg->type);
-	u32 remainder;
-	u32 val;
-
-	if (msg->tx_len < 3) {
-		DRM_DEV_ERROR(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) {
-			remainder = 0;
-			memcpy(&remainder, tx_buf, len);
-			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
-			len = 0;
-		} else {
-			memcpy(&remainder, tx_buf, pld_data_bytes);
-			dsi_write(dsi, DSI_GEN_PLD_DATA, remainder);
-			tx_buf += pld_data_bytes;
-			len -= pld_data_bytes;
-		}
-
-		ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
-					 val, !(val & GEN_PLD_W_FULL), 1000,
-					 CMD_PKT_STATUS_TIMEOUT_US);
-		if (ret < 0) {
-			DRM_DEV_ERROR(dsi->dev,
-				      "failed to get available write payload FIFO\n");
-			return ret;
-		}
-	}
-
-	return dw_mipi_dsi_gen_pkt_hdr_write(dsi, hdr_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;
-
-	dw_mipi_message_config(dsi, msg);
-
-	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:
-		DRM_DEV_ERROR(dsi->dev, "unsupported message type 0x%02x\n",
-			      msg->type);
-		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 void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
-{
-	u32 val;
-
-	val = ENABLE_LOW_POWER;
-
-	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
-		val |= VID_MODE_TYPE_BURST;
-	else if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
-		val |= VID_MODE_TYPE_NON_BURST_SYNC_PULSES;
-	else
-		val |= VID_MODE_TYPE_NON_BURST_SYNC_EVENTS;
-
-	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_LPCLK_CTRL, PHY_TXREQUESTCLKHS);
-		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_init(struct dw_mipi_dsi *dsi)
-{
-	/*
-	 * The maximum permitted escape clock is 20MHz and it is derived from
-	 * lanebyteclk, which is running at "lane_mbps / 8".  Thus we want:
-	 *
-	 *     (lane_mbps >> 3) / esc_clk_division < 20
-	 * which is:
-	 *     (lane_mbps >> 3) / 20 > esc_clk_division
-	 */
-	u32 esc_clk_division = (dsi->lane_mbps >> 3) / 20 + 1;
-
-	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(esc_clk_division));
-}
-
-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_NVSYNC)
-		val |= VSYNC_ACTIVE_LOW;
-	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
-		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_MODE_CFG, ENABLE_CMD_MODE);
-}
-
-/* Get lane byte clock cycles. */
-static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi,
-					   struct drm_display_mode *mode,
-					   u32 hcomponent)
-{
-	u32 frac, lbcc;
-
-	lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8;
-
-	frac = lbcc % mode->clock;
-	lbcc = lbcc / mode->clock;
-	if (frac)
-		lbcc++;
-
-	return lbcc;
-}
-
-static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi,
-					  struct drm_display_mode *mode)
-{
-	u32 htotal, hsa, hbp, lbcc;
-
-	htotal = mode->htotal;
-	hsa = mode->hsync_end - mode->hsync_start;
-	hbp = mode->htotal - mode->hsync_end;
-
-	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, htotal);
-	dsi_write(dsi, DSI_VID_HLINE_TIME, lbcc);
-
-	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hsa);
-	dsi_write(dsi, DSI_VID_HSA_TIME, lbcc);
-
-	lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, mode, hbp);
-	dsi_write(dsi, DSI_VID_HBP_TIME, lbcc);
-}
-
-static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi,
-					       struct drm_display_mode *mode)
-{
-	u32 vactive, vsa, vfp, vbp;
-
-	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_encoder_disable(struct drm_encoder *encoder)
-{
-	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
-
-	if (dsi->dpms_mode != DRM_MODE_DPMS_ON)
-		return;
-
-	if (clk_prepare_enable(dsi->pclk)) {
-		DRM_DEV_ERROR(dsi->dev, "Failed to enable pclk\n");
-		return;
-	}
-
-	drm_panel_disable(dsi->panel);
-
-	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
-	drm_panel_unprepare(dsi->panel);
-
-	dw_mipi_dsi_disable(dsi);
-	pm_runtime_put(dsi->dev);
-	clk_disable_unprepare(dsi->pclk);
-	dsi->dpms_mode = DRM_MODE_DPMS_OFF;
-}
-
-static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
-{
-	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
-	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
-	const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
-	int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
-	u32 val;
-	int ret;
-
-	ret = dw_mipi_dsi_get_lane_bps(dsi, mode);
-	if (ret < 0)
-		return;
-
-	if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
-		return;
-
-	if (clk_prepare_enable(dsi->pclk)) {
-		DRM_DEV_ERROR(dsi->dev, "Failed to enable pclk\n");
-		return;
-	}
-
-	pm_runtime_get_sync(dsi->dev);
-	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, mode);
-	dw_mipi_dsi_vertical_timing_config(dsi, mode);
-	dw_mipi_dsi_dphy_timing_config(dsi);
-	dw_mipi_dsi_dphy_interface_config(dsi);
-	dw_mipi_dsi_clear_err(dsi);
-
-	/*
-	 * For the RK3399, the clk of grf must be enabled before writing grf
-	 * register. And for RK3288 or other soc, this grf_clk must be NULL,
-	 * the clk_prepare_enable return true directly.
-	 */
-	ret = clk_prepare_enable(dsi->grf_clk);
-	if (ret) {
-		DRM_DEV_ERROR(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
-		return;
-	}
-
-	if (pdata->grf_dsi0_mode_reg)
-		regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
-			     pdata->grf_dsi0_mode);
-
-	dw_mipi_dsi_phy_init(dsi);
-	dw_mipi_dsi_wait_for_two_frames(mode);
-
-	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
-	if (drm_panel_prepare(dsi->panel))
-		DRM_DEV_ERROR(dsi->dev, "failed to prepare panel\n");
-
-	dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
-	drm_panel_enable(dsi->panel);
-
-	clk_disable_unprepare(dsi->pclk);
-
-	if (mux)
-		val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
-	else
-		val = pdata->dsi0_en_bit << 16;
-
-	regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
-	DRM_DEV_DEBUG(dsi->dev,
-		      "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
-	dsi->dpms_mode = DRM_MODE_DPMS_ON;
-
-	clk_disable_unprepare(dsi->grf_clk);
-}
-
-static int
-dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
-				 struct drm_crtc_state *crtc_state,
-				 struct drm_connector_state *conn_state)
-{
-	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
-	struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
-
-	switch (dsi->format) {
-	case MIPI_DSI_FMT_RGB888:
-		s->output_mode = ROCKCHIP_OUT_MODE_P888;
-		break;
-	case MIPI_DSI_FMT_RGB666:
-		s->output_mode = ROCKCHIP_OUT_MODE_P666;
-		break;
-	case MIPI_DSI_FMT_RGB565:
-		s->output_mode = ROCKCHIP_OUT_MODE_P565;
-		break;
-	default:
-		WARN_ON(1);
-		return -EINVAL;
-	}
-
-	s->output_type = DRM_MODE_CONNECTOR_DSI;
-
-	return 0;
-}
-
-static const struct drm_encoder_helper_funcs
-dw_mipi_dsi_encoder_helper_funcs = {
-	.enable = dw_mipi_dsi_encoder_enable,
-	.disable = dw_mipi_dsi_encoder_disable,
-	.atomic_check = dw_mipi_dsi_encoder_atomic_check,
-};
-
-static const struct drm_encoder_funcs dw_mipi_dsi_encoder_funcs = {
-	.destroy = drm_encoder_cleanup,
-};
-
-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 struct drm_connector_helper_funcs dw_mipi_dsi_connector_helper_funcs = {
-	.get_modes = dw_mipi_dsi_connector_get_modes,
-};
-
-static void dw_mipi_dsi_drm_connector_destroy(struct drm_connector *connector)
-{
-	drm_connector_unregister(connector);
-	drm_connector_cleanup(connector);
-}
-
-static const struct drm_connector_funcs dw_mipi_dsi_atomic_connector_funcs = {
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = dw_mipi_dsi_drm_connector_destroy,
-	.reset = drm_atomic_helper_connector_reset,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static int dw_mipi_dsi_register(struct drm_device *drm,
-				struct dw_mipi_dsi *dsi)
-{
-	struct drm_encoder *encoder = &dsi->encoder;
-	struct drm_connector *connector = &dsi->connector;
-	struct device *dev = dsi->dev;
-	int ret;
-
-	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm,
-							     dev->of_node);
-	/*
-	 * If we failed to find the CRTC(s) which this encoder is
-	 * supposed to be connected to, it's because the CRTC has
-	 * not been registered yet.  Defer probing, and hope that
-	 * the required CRTC is added later.
-	 */
-	if (encoder->possible_crtcs == 0)
-		return -EPROBE_DEFER;
-
-	drm_encoder_helper_add(&dsi->encoder,
-			       &dw_mipi_dsi_encoder_helper_funcs);
-	ret = drm_encoder_init(drm, &dsi->encoder, &dw_mipi_dsi_encoder_funcs,
-			       DRM_MODE_ENCODER_DSI, NULL);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "Failed to initialize encoder with drm\n");
-		return ret;
-	}
-
-	drm_connector_helper_add(connector,
-				 &dw_mipi_dsi_connector_helper_funcs);
-
-	drm_connector_init(drm, &dsi->connector,
-			   &dw_mipi_dsi_atomic_connector_funcs,
-			   DRM_MODE_CONNECTOR_DSI);
-
-	drm_connector_attach_encoder(connector, encoder);
-
-	return 0;
-}
-
-static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi)
-{
-	struct device_node *np = dsi->dev->of_node;
-
-	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
-	if (IS_ERR(dsi->grf_regmap)) {
-		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
-		return PTR_ERR(dsi->grf_regmap);
-	}
-
-	return 0;
-}
-
-static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
-	.dsi0_en_bit = RK3288_DSI0_SEL_VOP_LIT,
-	.dsi1_en_bit = RK3288_DSI1_SEL_VOP_LIT,
-	.grf_switch_reg = RK3288_GRF_SOC_CON6,
-	.max_data_lanes = 4,
-};
-
-static struct dw_mipi_dsi_plat_data rk3399_mipi_dsi_drv_data = {
-	.dsi0_en_bit = RK3399_DSI0_SEL_VOP_LIT,
-	.dsi1_en_bit = RK3399_DSI1_SEL_VOP_LIT,
-	.grf_switch_reg = RK3399_GRF_SOC_CON20,
-	.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
-	.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
-	.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
-	.max_data_lanes = 4,
-};
-
-static const struct of_device_id dw_mipi_dsi_dt_ids[] = {
-	{
-	 .compatible = "rockchip,rk3288-mipi-dsi",
-	 .data = &rk3288_mipi_dsi_drv_data,
-	}, {
-	 .compatible = "rockchip,rk3399-mipi-dsi",
-	 .data = &rk3399_mipi_dsi_drv_data,
-	},
-	{ /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, dw_mipi_dsi_dt_ids);
-
-static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
-			    void *data)
-{
-	const struct of_device_id *of_id =
-			of_match_device(dw_mipi_dsi_dt_ids, dev);
-	const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
-	struct platform_device *pdev = to_platform_device(dev);
-	struct reset_control *apb_rst;
-	struct drm_device *drm = data;
-	struct dw_mipi_dsi *dsi;
-	struct resource *res;
-	int ret;
-
-	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
-	if (!dsi)
-		return -ENOMEM;
-
-	dsi->dev = dev;
-	dsi->pdata = pdata;
-	dsi->dpms_mode = DRM_MODE_DPMS_OFF;
-
-	ret = rockchip_mipi_parse_dt(dsi);
-	if (ret)
-		return ret;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	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);
-		DRM_DEV_ERROR(dev,
-			      "Unable to get pll reference clock: %d\n", ret);
-		return ret;
-	}
-
-	dsi->pclk = devm_clk_get(dev, "pclk");
-	if (IS_ERR(dsi->pclk)) {
-		ret = PTR_ERR(dsi->pclk);
-		DRM_DEV_ERROR(dev, "Unable to get pclk: %d\n", ret);
-		return ret;
-	}
-
-	/*
-	 * Note that the reset was not defined in the initial device tree, so
-	 * we have to be prepared for it not being found.
-	 */
-	apb_rst = devm_reset_control_get(dev, "apb");
-	if (IS_ERR(apb_rst)) {
-		ret = PTR_ERR(apb_rst);
-		if (ret == -ENOENT) {
-			apb_rst = NULL;
-		} else {
-			DRM_DEV_ERROR(dev,
-				      "Unable to get reset control: %d\n", ret);
-			return ret;
-		}
-	}
-
-	if (apb_rst) {
-		ret = clk_prepare_enable(dsi->pclk);
-		if (ret) {
-			DRM_DEV_ERROR(dev, "Failed to enable pclk\n");
-			return ret;
-		}
-
-		reset_control_assert(apb_rst);
-		usleep_range(10, 20);
-		reset_control_deassert(apb_rst);
-
-		clk_disable_unprepare(dsi->pclk);
-	}
-
-	if (pdata->flags & DW_MIPI_NEEDS_PHY_CFG_CLK) {
-		dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg");
-		if (IS_ERR(dsi->phy_cfg_clk)) {
-			ret = PTR_ERR(dsi->phy_cfg_clk);
-			DRM_DEV_ERROR(dev,
-				      "Unable to get phy_cfg_clk: %d\n", ret);
-			return ret;
-		}
-	}
-
-	if (pdata->flags & DW_MIPI_NEEDS_GRF_CLK) {
-		dsi->grf_clk = devm_clk_get(dev, "grf");
-		if (IS_ERR(dsi->grf_clk)) {
-			ret = PTR_ERR(dsi->grf_clk);
-			DRM_DEV_ERROR(dev, "Unable to get grf_clk: %d\n", ret);
-			return ret;
-		}
-	}
-
-	ret = clk_prepare_enable(dsi->pllref_clk);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "Failed to enable pllref_clk\n");
-		return ret;
-	}
-
-	ret = dw_mipi_dsi_register(drm, dsi);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "Failed to register mipi_dsi: %d\n", ret);
-		goto err_pllref;
-	}
-
-	dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
-	dsi->dsi_host.dev = dev;
-	ret = mipi_dsi_host_register(&dsi->dsi_host);
-	if (ret) {
-		DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret);
-		goto err_cleanup;
-	}
-
-	if (!dsi->panel) {
-		ret = -EPROBE_DEFER;
-		goto err_mipi_dsi_host;
-	}
-
-	dev_set_drvdata(dev, dsi);
-	pm_runtime_enable(dev);
-	return 0;
-
-err_mipi_dsi_host:
-	mipi_dsi_host_unregister(&dsi->dsi_host);
-err_cleanup:
-	dsi->connector.funcs->destroy(&dsi->connector);
-	dsi->encoder.funcs->destroy(&dsi->encoder);
-err_pllref:
-	clk_disable_unprepare(dsi->pllref_clk);
-	return ret;
-}
-
-static 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);
-	pm_runtime_disable(dev);
-
-	dsi->connector.funcs->destroy(&dsi->connector);
-	dsi->encoder.funcs->destroy(&dsi->encoder);
-
-	clk_disable_unprepare(dsi->pllref_clk);
-}
-
-static const struct component_ops dw_mipi_dsi_ops = {
-	.bind	= dw_mipi_dsi_bind,
-	.unbind	= dw_mipi_dsi_unbind,
-};
-
-static int dw_mipi_dsi_probe(struct platform_device *pdev)
-{
-	return component_add(&pdev->dev, &dw_mipi_dsi_ops);
-}
-
-static int dw_mipi_dsi_remove(struct platform_device *pdev)
-{
-	component_del(&pdev->dev, &dw_mipi_dsi_ops);
-	return 0;
-}
-
-struct platform_driver dw_mipi_dsi_driver = {
-	.probe		= dw_mipi_dsi_probe,
-	.remove		= dw_mipi_dsi_remove,
-	.driver		= {
-		.of_match_table = dw_mipi_dsi_dt_ids,
-		.name	= DRIVER_NAME,
-	},
-};

drivers/gpu/drm/rockchip/rockchip_drm_drv.c

@@ -489,7 +489,7 @@ static int __init rockchip_drm_init(void)
 	ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
 	ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
 				CONFIG_ROCKCHIP_DW_HDMI);
-	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_driver,
+	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
 				CONFIG_ROCKCHIP_DW_MIPI_DSI);
 	ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
 

drivers/gpu/drm/rockchip/rockchip_drm_drv.h

@@ -67,7 +67,7 @@ int rockchip_drm_wait_vact_end(struct drm_crtc *crtc, unsigned int mstimeout);
 int rockchip_drm_endpoint_is_subdriver(struct device_node *ep);
 extern struct platform_driver cdn_dp_driver;
 extern struct platform_driver dw_hdmi_rockchip_pltfm_driver;
-extern struct platform_driver dw_mipi_dsi_driver;
+extern struct platform_driver dw_mipi_dsi_rockchip_driver;
 extern struct platform_driver inno_hdmi_driver;
 extern struct platform_driver rockchip_dp_driver;
 extern struct platform_driver rockchip_lvds_driver;