drm: rockchip: Support Synopsys DW MIPI DSI
authorChris Zhong <zyw@rock-chips.com>
Wed, 6 Jan 2016 08:12:54 +0000 (16:12 +0800)
committerMark Yao <mark.yao@rock-chips.com>
Wed, 6 Jan 2016 08:16:39 +0000 (16:16 +0800)
Add support for Synopsys DesignWare MIPI DSI controller which is
embedded in the rk3288 SoCs.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Acked-by: Mark Yao <mark.yao@rock-chips.com>
drivers/gpu/drm/rockchip/Kconfig
drivers/gpu/drm/rockchip/Makefile
drivers/gpu/drm/rockchip/dw-mipi-dsi.c [new file with mode: 0644]
drivers/gpu/drm/rockchip/rockchip_drm_vop.c

index 35215f6867d3d040c1646ba9c30425bcadacfa25..85739859dffca27112f0da1509cecb0a2f45fc17 100644 (file)
@@ -25,3 +25,13 @@ config ROCKCHIP_DW_HDMI
          for the Synopsys DesignWare HDMI driver. If you want to
          enable HDMI on RK3288 based SoC, you should selet this
          option.
+
+config ROCKCHIP_DW_MIPI_DSI
+       tristate "Rockchip specific extensions for Synopsys DW MIPI DSI"
+       depends on DRM_ROCKCHIP
+       select DRM_MIPI_DSI
+       help
+        This selects support for Rockchip SoC specific extensions
+        for the Synopsys DesignWare HDMI driver. If you want to
+        enable MIPI DSI on RK3288 based SoC, you should selet this
+        option.
index a9d380f3a423883a0f714f687c8479215c758e00..d1dc0f7b01dbdf48ad97e2829278b7f61bb6efea 100644 (file)
@@ -6,6 +6,7 @@ rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o rockchip_drm_fbdev.o \
                rockchip_drm_gem.o
 
 obj-$(CONFIG_ROCKCHIP_DW_HDMI) += dw_hdmi-rockchip.o
+obj-$(CONFIG_ROCKCHIP_DW_MIPI_DSI) += dw-mipi-dsi.o
 
 obj-$(CONFIG_DRM_ROCKCHIP) += rockchipdrm.o rockchip_drm_vop.o \
                                rockchip_vop_reg.o
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
new file mode 100644 (file)
index 0000000..7bfe243
--- /dev/null
@@ -0,0 +1,1194 @@
+/*
+ * 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/regmap.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 GRF_SOC_CON6                    0x025c
+#define DSI0_SEL_VOP_LIT                (1 << 6)
+#define DSI1_SEL_VOP_LIT                (1 << 9)
+
+#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_plat_data {
+       unsigned int max_data_lanes;
+       enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
+                                          struct drm_display_mode *mode);
+};
+
+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 *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;
+};
+
+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 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 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);
+}
+
+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, 0x19, PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
+       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, 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 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_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_encoder_mode_set(struct drm_encoder *encoder,
+                                       struct drm_display_mode *mode,
+                                       struct drm_display_mode *adjusted_mode)
+{
+       struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
+       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);
+       if (drm_panel_prepare(dsi->panel))
+               dev_err(dsi->dev, "failed to prepare panel\n");
+
+       clk_disable_unprepare(dsi->pclk);
+}
+
+static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
+{
+       struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
+
+       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);
+}
+
+static bool dw_mipi_dsi_encoder_mode_fixup(struct drm_encoder *encoder,
+                                       const struct drm_display_mode *mode,
+                                       struct drm_display_mode *adjusted_mode)
+{
+       return true;
+}
+
+static void dw_mipi_dsi_encoder_commit(struct drm_encoder *encoder)
+{
+       struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
+       int mux  = rockchip_drm_encoder_get_mux_id(dsi->dev->of_node, encoder);
+       u32 interface_pix_fmt;
+       u32 val;
+
+       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_wait_for_two_frames(dsi);
+
+       dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
+       drm_panel_enable(dsi->panel);
+
+       clk_disable_unprepare(dsi->pclk);
+
+       switch (dsi->format) {
+       case MIPI_DSI_FMT_RGB888:
+               interface_pix_fmt = ROCKCHIP_OUT_MODE_P888;
+               break;
+       case MIPI_DSI_FMT_RGB666:
+               interface_pix_fmt = ROCKCHIP_OUT_MODE_P666;
+               break;
+       case MIPI_DSI_FMT_RGB565:
+               interface_pix_fmt = ROCKCHIP_OUT_MODE_P565;
+               break;
+       default:
+               WARN_ON(1);
+               return;
+       }
+
+       rockchip_drm_crtc_mode_config(encoder->crtc, DRM_MODE_CONNECTOR_DSI,
+                                     interface_pix_fmt);
+
+       if (mux)
+               val = DSI0_SEL_VOP_LIT | (DSI0_SEL_VOP_LIT << 16);
+       else
+               val = DSI0_SEL_VOP_LIT << 16;
+
+       regmap_write(dsi->grf_regmap, GRF_SOC_CON6, val);
+       dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
+}
+
+static struct drm_encoder_helper_funcs
+dw_mipi_dsi_encoder_helper_funcs = {
+       .mode_fixup = dw_mipi_dsi_encoder_mode_fixup,
+       .commit = dw_mipi_dsi_encoder_commit,
+       .mode_set = dw_mipi_dsi_encoder_mode_set,
+       .disable = dw_mipi_dsi_encoder_disable,
+};
+
+static 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 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->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 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_atomic_connector_funcs = {
+       .dpms = drm_atomic_helper_connector_dpms,
+       .fill_modes = drm_helper_probe_single_connector_modes,
+       .detect = dw_mipi_dsi_detect,
+       .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) {
+               dev_err(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_mode_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)) {
+               dev_err(dsi->dev, "Unable to get rockchip,grf\n");
+               return PTR_ERR(dsi->grf_regmap);
+       }
+
+       return 0;
+}
+
+static enum drm_mode_status rk3288_mipi_dsi_mode_valid(
+                                       struct drm_connector *connector,
+                                       struct drm_display_mode *mode)
+{
+       /*
+        * The VID_PKT_SIZE field in the DSI_VID_PKT_CFG
+        * register is 11-bit.
+        */
+       if (mode->hdisplay > 0x7ff)
+               return MODE_BAD_HVALUE;
+
+       /*
+        * The V_ACTIVE_LINES field in the DSI_VTIMING_CFG
+        * register is 11-bit.
+        */
+       if (mode->vdisplay > 0x7ff)
+               return MODE_BAD_VVALUE;
+
+       return MODE_OK;
+}
+
+static struct dw_mipi_dsi_plat_data rk3288_mipi_dsi_drv_data = {
+       .max_data_lanes = 4,
+       .mode_valid = rk3288_mipi_dsi_mode_valid,
+};
+
+static const struct of_device_id dw_mipi_dsi_dt_ids[] = {
+       {
+        .compatible = "rockchip,rk3288-mipi-dsi",
+        .data = &rk3288_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 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;
+
+       ret = rockchip_mipi_parse_dt(dsi);
+       if (ret)
+               return ret;
+
+       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;
+       }
+
+       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);
+               return ret;
+       }
+
+       ret = clk_prepare_enable(dsi->pllref_clk);
+       if (ret) {
+               dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
+               return ret;
+       }
+
+       ret = dw_mipi_dsi_register(drm, dsi);
+       if (ret) {
+               dev_err(dev, "Failed to register mipi_dsi: %d\n", ret);
+               goto err_pllref;
+       }
+
+       dev_set_drvdata(dev, dsi);
+
+       dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
+       dsi->dsi_host.dev = dev;
+       return mipi_dsi_host_register(&dsi->dsi_host);
+
+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);
+       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;
+}
+
+static 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,
+       },
+};
+module_platform_driver(dw_mipi_dsi_driver);
+
+MODULE_DESCRIPTION("ROCKCHIP MIPI DSI host controller driver");
+MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
index 056cac3f0fb1ac5f7aa9f230162bbab0927f6403..46c2a8dfd8aa78b22caf02d9b1e217b8d011dd25 100644 (file)
@@ -818,6 +818,9 @@ int rockchip_drm_crtc_mode_config(struct drm_crtc *crtc,
        case DRM_MODE_CONNECTOR_HDMIA:
                VOP_CTRL_SET(vop, hdmi_en, 1);
                break;
+       case DRM_MODE_CONNECTOR_DSI:
+               VOP_CTRL_SET(vop, mipi_en, 1);
+               break;
        default:
                DRM_ERROR("unsupport connector_type[%d]\n", connector_type);
                return -EINVAL;
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