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

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/*
* 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;
}
dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
dsi->dsi_host.dev = dev;
ret = mipi_dsi_host_register(&dsi->dsi_host);
if (ret) {
DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret);
goto err_cleanup;
}
if (!dsi->panel) {
ret = -EPROBE_DEFER;
goto err_mipi_dsi_host;
}
dev_set_drvdata(dev, dsi);
pm_runtime_enable(dev);
return 0;
err_mipi_dsi_host:
mipi_dsi_host_unregister(&dsi->dsi_host);
err_cleanup:
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,
},
};
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