Re: [PATCH v3 4/5] drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver

From: Matthias Kaehlcke
Date: Tue Nov 28 2017 - 15:48:52 EST

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In reply to: Nickey Yang: "[PATCH v3 4/5] drm/rockchip: Add ROCKCHIP DW MIPI DSI controller driver"
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El Tue, Nov 28, 2017 at 07:20:05PM +0800 Nickey Yang ha dit:

> Add the ROCKCHIP DSI controller driver that uses the Synopsys DesignWare
> MIPI DSI host controller bridge.
>
> 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 âbind()â logic into 'probe()'
> add 'dev_set_drvdata()'
>
> Signed-off-by: Nickey Yang <nickey.yang@xxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/rockchip/Kconfig | 2 +-
> drivers/gpu/drm/rockchip/Makefile | 2 +-
> drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 1349 -----------------------
> drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c | 764 +++++++++++++
> drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 2 +-
> drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 2 +-
> 6 files changed, 768 insertions(+), 1353 deletions(-)
> delete mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> create mode 100644 drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
>
> diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
> index 0ccc762..9eb4795 100644
> --- a/drivers/gpu/drm/rockchip/Kconfig
> +++ b/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 SND_SOC_HDMI_CODEC if ROCKCHIP_CDN_DP && SND_SOC
> help
> Choose this option if you have a Rockchip soc chipset.
> diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
> index a314e21..c05fe47 100644
> --- a/drivers/gpu/drm/rockchip/Makefile
> +++ b/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
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> deleted file mode 100644
> index b15755b..0000000
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ /dev/null
> @@ -1,1349 +0,0 @@
> -/*
> - * 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 (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_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)) {
> - 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);
> - 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);
> - 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;
> - }
> -
> - pm_runtime_enable(dev);
> -
> - 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);
> - return 0;
> -
> -err_mipi_dsi_host:
> - mipi_dsi_host_unregister(&dsi->dsi_host);
> -err_cleanup:
> - drm_encoder_cleanup(&dsi->encoder);
> - drm_connector_cleanup(&dsi->connector);
> -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);
> - 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,
> - },
> -};
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> new file mode 100644
> index 0000000..c682ed2
> --- /dev/null
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi_rockchip.c
> @@ -0,0 +1,764 @@
> +/*
> + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
> + * Author:
> + * Chris Zhong <zyw@xxxxxxxxxxxxxx>
> + * Nickey Yang <nickey.yang@xxxxxxxxxxxxxx>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> + *
> + * License terms: GNU General Public License (GPL), version 2
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/iopoll.h>
> +#include <linux/math64.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <drm/drmP.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/bridge/dw_mipi_dsi.h>
> +#include <video/mipi_display.h>
> +#include <linux/regmap.h>
> +#include <drm/drm_of.h>
> +#include <linux/mfd/syscon.h>
> +
> +#include "rockchip_drm_drv.h"
> +#include "rockchip_drm_vop.h"
> +
> +#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 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_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 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 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_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;
> +
> + vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;

Please add a clarifying comment as requested by Sean on
https://chromium-review.googlesource.com/#/c/chromiumos/third_party/kernel/+/780120/

> + 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, less than 512.
> + */

It seems this should be "not bigger than 512" or something similar.

> + if (_fbdiv < 6 || _fbdiv > 512)
> + continue;
> +
> + _fbdiv += _fbdiv % 2;
> +
> + tmp = (u64)_fbdiv * fin;
> + do_div(tmp, _prediv);

Should we bail out early if min_prediv == 0 due to some bogus
configuration of pllref_clk?

> + 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 -1;

> + }
> +
> + 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_encoder_mode_set(struct drm_encoder *encoder,
> + struct drm_display_mode *mode,
> + struct drm_display_mode *adjusted)
> +{
> + struct dw_mipi_dsi_rockchip *dsi = to_dsi(encoder);
> + const struct rockchip_dw_dsi_chip_data *cdata = dsi->cdata;
> + int val, ret, mux;
> +
> + mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node,
> + &dsi->encoder);
> + if (mux < 0)
> + return;
> + /*
> + * 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;
> + }
> +
> + val = cdata->dsi0_en_bit << 16;
> + if (mux)
> + val |= cdata->dsi0_en_bit;
> + regmap_write(dsi->grf_regmap, cdata->grf_switch_reg, val);
> +
> + if (cdata->grf_dsi0_mode_reg)
> + regmap_write(dsi->grf_regmap, cdata->grf_dsi0_mode_reg,
> + cdata->grf_dsi0_mode);
> +
> + 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_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 const struct drm_encoder_helper_funcs
> +dw_mipi_dsi_encoder_helper_funcs = {
> + .mode_set = dw_mipi_dsi_encoder_mode_set,
> + .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 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 platform_device *pdev = to_platform_device(dev);
> + struct drm_device *drm_dev = data;
> + int ret;
> +
> + 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.priv_data = dsi;
> +
> + ret = clk_prepare_enable(dsi->pllref_clk);
> + if (ret) {
> + DRM_DEV_ERROR(dev,
> + "%s: Failed to enable pllref_clk\n", __func__);
> + return ret;
> + }
> +
> + ret = rockchip_dsi_drm_create_encoder(dsi, drm_dev);
> + if (ret) {
> + DRM_ERROR("Failed to create drm encoder\n");
> + goto err_pllref;
> + }
> +
> + dsi->dmd = dw_mipi_dsi_bind(pdev, &dsi->encoder, &dsi->pdata);
> + if (IS_ERR(dsi->dmd)) {
> + DRM_ERROR("Failed to bind\n");
> + ret = PTR_ERR(dsi->dmd);
> + goto err_pllref;
> + }
> + return 0;
> +
> +err_pllref:
> + clk_disable_unprepare(dsi->pllref_clk);
> + return ret;
> +}
> +
> +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_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;
> +
> + dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> + if (!dsi)
> + return -ENOMEM;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res) {
> + DRM_ERROR("Unable to get resource\n");
> + return -ENODEV;
> + }
> +
> + dsi->base = devm_ioremap_resource(dev, res);
> + if (IS_ERR(dsi->base)) {
> + DRM_ERROR("Unable to get dsi registers\n");
> + 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;
> + }
> +
> + if (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 (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->cdata = cdata;
> + dsi->dev = dev;
> + dev_set_drvdata(dev, dsi);
> +
> + return component_add(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
> +}
> +
> +static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)
> +{
> + component_del(&pdev->dev, &dw_mipi_dsi_rockchip_ops);
> +
> + return 0;
> +}
> +
> +static struct rockchip_dw_dsi_chip_data rk3288_chip_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 rockchip_dw_dsi_chip_data rk3399_chip_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_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",
> + },
> +};
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> index 76d63de..d40cc39 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> @@ -462,7 +462,7 @@ 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);
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> index 498dfbc..af235b2 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> @@ -66,7 +66,7 @@ void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
>
> 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;

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