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// SPDX-License-Identifier: GPL-2.0
/*
* Driver for panels based on Sitronix ST7703 controller, souch as:
*
* - Rocktech jh057n00900 5.5" MIPI-DSI panel
*
* Copyright (C) Purism SPC 2019
*/
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <video/display_timing.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#define DRV_NAME "panel-sitronix-st7703"
/* Manufacturer specific Commands send via DSI */
#define ST7703_CMD_ALL_PIXEL_OFF 0x22
#define ST7703_CMD_ALL_PIXEL_ON 0x23
#define ST7703_CMD_SETAPID 0xB1
#define ST7703_CMD_SETDISP 0xB2
#define ST7703_CMD_SETRGBIF 0xB3
#define ST7703_CMD_SETCYC 0xB4
#define ST7703_CMD_SETBGP 0xB5
#define ST7703_CMD_SETVCOM 0xB6
#define ST7703_CMD_SETOTP 0xB7
#define ST7703_CMD_SETPOWER_EXT 0xB8
#define ST7703_CMD_SETEXTC 0xB9
#define ST7703_CMD_SETMIPI 0xBA
#define ST7703_CMD_SETVDC 0xBC
#define ST7703_CMD_UNKNOWN_BF 0xBF
#define ST7703_CMD_SETSCR 0xC0
#define ST7703_CMD_SETPOWER 0xC1
#define ST7703_CMD_SETECO 0xC6
#define ST7703_CMD_SETIO 0xC7
#define ST7703_CMD_SETCABC 0xC8
#define ST7703_CMD_SETPANEL 0xCC
#define ST7703_CMD_SETGAMMA 0xE0
#define ST7703_CMD_SETEQ 0xE3
#define ST7703_CMD_SETGIP1 0xE9
#define ST7703_CMD_SETGIP2 0xEA
#define ST7703_CMD_UNKNOWN_EF 0xEF
struct st7703 {
struct device *dev;
struct drm_panel panel;
struct gpio_desc *reset_gpio;
struct regulator *vcc;
struct regulator *iovcc;
bool prepared;
struct dentry *debugfs;
const struct st7703_panel_desc *desc;
};
struct st7703_panel_desc {
const struct drm_display_mode *mode;
unsigned int lanes;
unsigned long mode_flags;
enum mipi_dsi_pixel_format format;
int (*init_sequence)(struct st7703 *ctx);
static inline struct st7703 *panel_to_st7703(struct drm_panel *panel)
return container_of(panel, struct st7703, panel);
static int jh057n_init_sequence(struct st7703 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
/*
* Init sequence was supplied by the panel vendor. Most of the commands
* resemble the ST7703 but the number of parameters often don't match
* so it's likely a clone.
*/
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETEXTC,
0xF1, 0x12, 0x83);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETRGBIF,
0x10, 0x10, 0x05, 0x05, 0x03, 0xFF, 0x00, 0x00,
0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETSCR,
0x73, 0x73, 0x50, 0x50, 0x00, 0x00, 0x08, 0x70,
0x00);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETVDC, 0x4E);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETPANEL, 0x0B);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETCYC, 0x80);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETDISP, 0xF0, 0x12, 0x30);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETEQ,
0x07, 0x07, 0x0B, 0x0B, 0x03, 0x0B, 0x00, 0x00,
0x00, 0x00, 0xFF, 0x00, 0xC0, 0x10);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETBGP, 0x08, 0x08);
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mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETVCOM, 0x3F, 0x3F);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_UNKNOWN_BF, 0x02, 0x11, 0x00);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETGIP1,
0x82, 0x10, 0x06, 0x05, 0x9E, 0x0A, 0xA5, 0x12,
0x31, 0x23, 0x37, 0x83, 0x04, 0xBC, 0x27, 0x38,
0x0C, 0x00, 0x03, 0x00, 0x00, 0x00, 0x0C, 0x00,
0x03, 0x00, 0x00, 0x00, 0x75, 0x75, 0x31, 0x88,
0x88, 0x88, 0x88, 0x88, 0x88, 0x13, 0x88, 0x64,
0x64, 0x20, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88,
0x02, 0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETGIP2,
0x02, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x02, 0x46, 0x02, 0x88,
0x88, 0x88, 0x88, 0x88, 0x88, 0x64, 0x88, 0x13,
0x57, 0x13, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88,
0x75, 0x88, 0x23, 0x14, 0x00, 0x00, 0x02, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x0A,
0xA5, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_SETGAMMA,
0x00, 0x09, 0x0E, 0x29, 0x2D, 0x3C, 0x41, 0x37,
0x07, 0x0B, 0x0D, 0x10, 0x11, 0x0F, 0x10, 0x11,
0x18, 0x00, 0x09, 0x0E, 0x29, 0x2D, 0x3C, 0x41,
0x37, 0x07, 0x0B, 0x0D, 0x10, 0x11, 0x0F, 0x10,
0x11, 0x18);
return 0;
}
static const struct drm_display_mode jh057n00900_mode = {
.hdisplay = 720,
.hsync_start = 720 + 90,
.hsync_end = 720 + 90 + 20,
.htotal = 720 + 90 + 20 + 20,
.vdisplay = 1440,
.vsync_start = 1440 + 20,
.vsync_end = 1440 + 20 + 4,
.vtotal = 1440 + 20 + 4 + 12,
.clock = 75276,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 65,
.height_mm = 130,
};
static const struct st7703_panel_desc jh057n00900_panel_desc = {
.mode = &jh057n00900_mode,
.lanes = 4,
.mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
.format = MIPI_DSI_FMT_RGB888,
.init_sequence = jh057n_init_sequence,
};
static int xbd599_init_sequence(struct st7703 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
/*
* Init sequence was supplied by the panel vendor.
*/
/* Magic sequence to unlock user commands below. */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETEXTC, 0xF1, 0x12, 0x83);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETMIPI,
0x33, /* VC_main = 0, Lane_Number = 3 (4 lanes) */
0x81, /* DSI_LDO_SEL = 1.7V, RTERM = 90 Ohm */
0x05, /* IHSRX = x6 (Low High Speed driving ability) */
0xF9, /* TX_CLK_SEL = fDSICLK/16 */
0x0E, /* HFP_OSC (min. HFP number in DSI mode) */
0x0E, /* HBP_OSC (min. HBP number in DSI mode) */
/* The rest is undocumented in ST7703 datasheet */
0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x44, 0x25, 0x00, 0x91, 0x0a, 0x00, 0x00, 0x02,
0x4F, 0x11, 0x00, 0x00, 0x37);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPOWER_EXT,
0x25, /* PCCS = 2, ECP_DC_DIV = 1/4 HSYNC */
0x22, /* DT = 15ms XDK_ECP = x2 */
0x20, /* PFM_DC_DIV = /1 */
0x03 /* ECP_SYNC_EN = 1, VGX_SYNC_EN = 1 */);
/* RGB I/F porch timing */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETRGBIF,
0x10, /* VBP_RGB_GEN */
0x10, /* VFP_RGB_GEN */
0x05, /* DE_BP_RGB_GEN */
0x05, /* DE_FP_RGB_GEN */
/* The rest is undocumented in ST7703 datasheet */
0x03, 0xFF,
0x00, 0x00,
0x00, 0x00);
/* Source driving settings. */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETSCR,
0x73, /* N_POPON */
0x73, /* N_NOPON */
0x50, /* I_POPON */
0x50, /* I_NOPON */
0x00, /* SCR[31,24] */
0xC0, /* SCR[23,16] */
0x08, /* SCR[15,8] */
0x70, /* SCR[7,0] */
0x00 /* Undocumented */);
/* NVDDD_SEL = -1.8V, VDDD_SEL = out of range (possibly 1.9V?) */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETVDC, 0x4E);
/*
* SS_PANEL = 1 (reverse scan), GS_PANEL = 0 (normal scan)
* REV_PANEL = 1 (normally black panel), BGR_PANEL = 1 (BGR)
*/
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPANEL, 0x0B);
/* Zig-Zag Type C column inversion. */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETCYC, 0x80);
/* Set display resolution. */
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mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETDISP,
0xF0, /* NL = 240 */
0x12, /* RES_V_LSB = 0, BLK_CON = VSSD,
* RESO_SEL = 720RGB
*/
0xF0 /* WHITE_GND_EN = 1 (GND),
* WHITE_FRAME_SEL = 7 frames,
* ISC = 0 frames
*/);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETEQ,
0x00, /* PNOEQ */
0x00, /* NNOEQ */
0x0B, /* PEQGND */
0x0B, /* NEQGND */
0x10, /* PEQVCI */
0x10, /* NEQVCI */
0x00, /* PEQVCI1 */
0x00, /* NEQVCI1 */
0x00, /* reserved */
0x00, /* reserved */
0xFF, /* reserved */
0x00, /* reserved */
0xC0, /* ESD_DET_DATA_WHITE = 1, ESD_WHITE_EN = 1 */
0x10 /* SLPIN_OPTION = 1 (no need vsync after sleep-in)
* VEDIO_NO_CHECK_EN = 0
* ESD_WHITE_GND_EN = 0
* ESD_DET_TIME_SEL = 0 frames
*/);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETECO, 0x01, 0x00, 0xFF, 0xFF, 0x00);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPOWER,
0x74, /* VBTHS, VBTLS: VGH = 17V, VBL = -11V */
0x00, /* FBOFF_VGH = 0, FBOFF_VGL = 0 */
0x32, /* VRP */
0x32, /* VRN */
0x77, /* reserved */
0xF1, /* APS = 1 (small),
* VGL_DET_EN = 1, VGH_DET_EN = 1,
* VGL_TURBO = 1, VGH_TURBO = 1
*/
0xFF, /* VGH1_L_DIV, VGL1_L_DIV (1.5MHz) */
0xFF, /* VGH1_R_DIV, VGL1_R_DIV (1.5MHz) */
0xCC, /* VGH2_L_DIV, VGL2_L_DIV (2.6MHz) */
0xCC, /* VGH2_R_DIV, VGL2_R_DIV (2.6MHz) */
0x77, /* VGH3_L_DIV, VGL3_L_DIV (4.5MHz) */
0x77 /* VGH3_R_DIV, VGL3_R_DIV (4.5MHz) */);
/* Reference voltage. */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETBGP,
0x07, /* VREF_SEL = 4.2V */
0x07 /* NVREF_SEL = 4.2V */);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETVCOM,
0x2C, /* VCOMDC_F = -0.67V */
0x2C /* VCOMDC_B = -0.67V */);
/* Undocumented command. */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_UNKNOWN_BF, 0x02, 0x11, 0x00);
/* This command is to set forward GIP timing. */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGIP1,
0x82, 0x10, 0x06, 0x05, 0xA2, 0x0A, 0xA5, 0x12,
0x31, 0x23, 0x37, 0x83, 0x04, 0xBC, 0x27, 0x38,
0x0C, 0x00, 0x03, 0x00, 0x00, 0x00, 0x0C, 0x00,
0x03, 0x00, 0x00, 0x00, 0x75, 0x75, 0x31, 0x88,
0x88, 0x88, 0x88, 0x88, 0x88, 0x13, 0x88, 0x64,
0x64, 0x20, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88,
0x02, 0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
/* This command is to set backward GIP timing. */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGIP2,
0x02, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x02, 0x46, 0x02, 0x88,
0x88, 0x88, 0x88, 0x88, 0x88, 0x64, 0x88, 0x13,
0x57, 0x13, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88,
0x75, 0x88, 0x23, 0x14, 0x00, 0x00, 0x02, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x0A,
0xA5, 0x00, 0x00, 0x00, 0x00);
/* Adjust the gamma characteristics of the panel. */
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGAMMA,
0x00, 0x09, 0x0D, 0x23, 0x27, 0x3C, 0x41, 0x35,
0x07, 0x0D, 0x0E, 0x12, 0x13, 0x10, 0x12, 0x12,
0x18, 0x00, 0x09, 0x0D, 0x23, 0x27, 0x3C, 0x41,
0x35, 0x07, 0x0D, 0x0E, 0x12, 0x13, 0x10, 0x12,
0x12, 0x18);
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return 0;
}
static const struct drm_display_mode xbd599_mode = {
.hdisplay = 720,
.hsync_start = 720 + 40,
.hsync_end = 720 + 40 + 40,
.htotal = 720 + 40 + 40 + 40,
.vdisplay = 1440,
.vsync_start = 1440 + 18,
.vsync_end = 1440 + 18 + 10,
.vtotal = 1440 + 18 + 10 + 17,
.clock = 69000,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 68,
.height_mm = 136,
};
static const struct st7703_panel_desc xbd599_desc = {
.mode = &xbd599_mode,
.lanes = 4,
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
.format = MIPI_DSI_FMT_RGB888,
.init_sequence = xbd599_init_sequence,
};
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static int rg353v2_init_sequence(struct st7703 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
/*
* Init sequence was supplied by the panel vendor.
*/
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETEXTC, 0xf1, 0x12, 0x83);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETAPID, 0x00, 0x00, 0x00,
0xda, 0x80);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETDISP, 0x00, 0x13, 0x70);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETRGBIF, 0x10, 0x10, 0x28,
0x28, 0x03, 0xff, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETCYC, 0x80);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETBGP, 0x0a, 0x0a);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETVCOM, 0x92, 0x92);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPOWER_EXT, 0x25, 0x22,
0xf0, 0x63);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETMIPI, 0x33, 0x81, 0x05,
0xf9, 0x0e, 0x0e, 0x20, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x44, 0x25, 0x00, 0x90, 0x0a,
0x00, 0x00, 0x01, 0x4f, 0x01, 0x00, 0x00, 0x37);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETVDC, 0x47);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_UNKNOWN_BF, 0x02, 0x11, 0x00);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETSCR, 0x73, 0x73, 0x50, 0x50,
0x00, 0x00, 0x12, 0x50, 0x00);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPOWER, 0x53, 0xc0, 0x32,
0x32, 0x77, 0xe1, 0xdd, 0xdd, 0x77, 0x77, 0x33,
0x33);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETECO, 0x82, 0x00, 0xbf, 0xff,
0x00, 0xff);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETIO, 0xb8, 0x00, 0x0a, 0x00,
0x00, 0x00);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETCABC, 0x10, 0x40, 0x1e,
0x02);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETPANEL, 0x0b);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGAMMA, 0x00, 0x07, 0x0d,
0x37, 0x35, 0x3f, 0x41, 0x44, 0x06, 0x0c, 0x0d,
0x0f, 0x11, 0x10, 0x12, 0x14, 0x1a, 0x00, 0x07,
0x0d, 0x37, 0x35, 0x3f, 0x41, 0x44, 0x06, 0x0c,
0x0d, 0x0f, 0x11, 0x10, 0x12, 0x14, 0x1a);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETEQ, 0x07, 0x07, 0x0b, 0x0b,
0x0b, 0x0b, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
0xc0, 0x10);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGIP1, 0xc8, 0x10, 0x02, 0x00,
0x00, 0xb0, 0xb1, 0x11, 0x31, 0x23, 0x28, 0x80,
0xb0, 0xb1, 0x27, 0x08, 0x00, 0x04, 0x02, 0x00,
0x00, 0x00, 0x00, 0x04, 0x02, 0x00, 0x00, 0x00,
0x88, 0x88, 0xba, 0x60, 0x24, 0x08, 0x88, 0x88,
0x88, 0x88, 0x88, 0x88, 0x88, 0xba, 0x71, 0x35,
0x18, 0x88, 0x88, 0x88, 0x88, 0x88, 0x00, 0x00,
0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_SETGIP2, 0x97, 0x0a, 0x82, 0x02,
0x03, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x81, 0x88, 0xba, 0x17, 0x53, 0x88, 0x88, 0x88,
0x88, 0x88, 0x88, 0x80, 0x88, 0xba, 0x06, 0x42,
0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x23, 0x00,
0x00, 0x02, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00);
mipi_dsi_dcs_write_seq(dsi, ST7703_CMD_UNKNOWN_EF, 0xff, 0xff, 0x01);
return 0;
}
static const struct drm_display_mode rg353v2_mode = {
.hdisplay = 640,
.hsync_start = 640 + 40,
.hsync_end = 640 + 40 + 2,
.htotal = 640 + 40 + 2 + 80,
.vdisplay = 480,
.vsync_start = 480 + 18,
.vsync_end = 480 + 18 + 2,
.vtotal = 480 + 18 + 2 + 28,
.clock = 24150,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 70,
.height_mm = 57,
};
static const struct st7703_panel_desc rg353v2_desc = {
.mode = &rg353v2_mode,
.lanes = 4,
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_LPM,
.format = MIPI_DSI_FMT_RGB888,
.init_sequence = rg353v2_init_sequence,
};
static int st7703_enable(struct drm_panel *panel)
struct st7703 *ctx = panel_to_st7703(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
ret = ctx->desc->init_sequence(ctx);
dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
return ret;
}
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
return ret;
}
/* It takes the controller 120 msec to wake up after sleep. */
msleep(120);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret)
return ret;
dev_dbg(ctx->dev, "Panel init sequence done\n");
return 0;
static int st7703_disable(struct drm_panel *panel)
struct st7703 *ctx = panel_to_st7703(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0)
dev_err(ctx->dev, "Failed to turn off the display: %d\n", ret);
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0)
dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
/* It takes the controller 120 msec to enter sleep mode. */
msleep(120);
static int st7703_unprepare(struct drm_panel *panel)
struct st7703 *ctx = panel_to_st7703(panel);
if (!ctx->prepared)
return 0;
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_disable(ctx->iovcc);
regulator_disable(ctx->vcc);
ctx->prepared = false;
return 0;
}
static int st7703_prepare(struct drm_panel *panel)
struct st7703 *ctx = panel_to_st7703(panel);
int ret;
if (ctx->prepared)
return 0;
dev_dbg(ctx->dev, "Resetting the panel\n");
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
ret = regulator_enable(ctx->iovcc);
dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
ret = regulator_enable(ctx->vcc);
dev_err(ctx->dev, "Failed to enable vcc supply: %d\n", ret);
regulator_disable(ctx->iovcc);
return ret;
/* Give power supplies time to stabilize before deasserting reset. */
usleep_range(10000, 20000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(15000, 20000);
ctx->prepared = true;
return 0;
}
static const u32 mantix_bus_formats[] = {
MEDIA_BUS_FMT_RGB888_1X24,
};
static int st7703_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
struct st7703 *ctx = panel_to_st7703(panel);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);
dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
ctx->desc->mode->hdisplay, ctx->desc->mode->vdisplay,
drm_mode_vrefresh(ctx->desc->mode));
return -ENOMEM;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_mode_probed_add(connector, mode);
drm_display_info_set_bus_formats(&connector->display_info,
mantix_bus_formats,
ARRAY_SIZE(mantix_bus_formats));
static const struct drm_panel_funcs st7703_drm_funcs = {
.disable = st7703_disable,
.unprepare = st7703_unprepare,
.prepare = st7703_prepare,
.enable = st7703_enable,
.get_modes = st7703_get_modes,
};
static int allpixelson_set(void *data, u64 val)
{
struct st7703 *ctx = data;
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
dev_dbg(ctx->dev, "Setting all pixels on\n");
mipi_dsi_generic_write_seq(dsi, ST7703_CMD_ALL_PIXEL_ON);
msleep(val * 1000);
/* Reset the panel to get video back */
drm_panel_disable(&ctx->panel);
drm_panel_unprepare(&ctx->panel);
drm_panel_prepare(&ctx->panel);
drm_panel_enable(&ctx->panel);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(allpixelson_fops, NULL,
allpixelson_set, "%llu\n");
static void st7703_debugfs_init(struct st7703 *ctx)
{
ctx->debugfs = debugfs_create_dir(DRV_NAME, NULL);
Greg Kroah-Hartman
committed
debugfs_create_file("allpixelson", 0600, ctx->debugfs, ctx,
&allpixelson_fops);
static void st7703_debugfs_remove(struct st7703 *ctx)
{
debugfs_remove_recursive(ctx->debugfs);
ctx->debugfs = NULL;
}
static int st7703_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct st7703 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio))
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), "Failed to get reset gpio\n");
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;
ctx->desc = of_device_get_match_data(dev);
dsi->mode_flags = ctx->desc->mode_flags;
dsi->format = ctx->desc->format;
dsi->lanes = ctx->desc->lanes;
ctx->vcc = devm_regulator_get(dev, "vcc");
if (IS_ERR(ctx->vcc))
return dev_err_probe(dev, PTR_ERR(ctx->vcc), "Failed to request vcc regulator\n");
ctx->iovcc = devm_regulator_get(dev, "iovcc");
if (IS_ERR(ctx->iovcc))
return dev_err_probe(dev, PTR_ERR(ctx->iovcc),
"Failed to request iovcc regulator\n");
drm_panel_init(&ctx->panel, dev, &st7703_drm_funcs,
DRM_MODE_CONNECTOR_DSI);
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return ret;
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(dev, "mipi_dsi_attach failed (%d). Is host ready?\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
ctx->desc->mode->hdisplay, ctx->desc->mode->vdisplay,
drm_mode_vrefresh(ctx->desc->mode),
mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
st7703_debugfs_init(ctx);
static void st7703_shutdown(struct mipi_dsi_device *dsi)
struct st7703 *ctx = mipi_dsi_get_drvdata(dsi);
ret = drm_panel_unprepare(&ctx->panel);
dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);
ret = drm_panel_disable(&ctx->panel);
dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);
static void st7703_remove(struct mipi_dsi_device *dsi)
struct st7703 *ctx = mipi_dsi_get_drvdata(dsi);
st7703_shutdown(dsi);
ret = mipi_dsi_detach(dsi);
if (ret < 0)
dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
st7703_debugfs_remove(ctx);
static const struct of_device_id st7703_of_match[] = {
{ .compatible = "anbernic,rg353v-panel-v2", .data = &rg353v2_desc },
{ .compatible = "rocktech,jh057n00900", .data = &jh057n00900_panel_desc },
{ .compatible = "xingbangda,xbd599", .data = &xbd599_desc },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, st7703_of_match);
static struct mipi_dsi_driver st7703_driver = {
.probe = st7703_probe,
.remove = st7703_remove,
.shutdown = st7703_shutdown,
.driver = {
.name = DRV_NAME,
.of_match_table = st7703_of_match,
module_mipi_dsi_driver(st7703_driver);
MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>");
MODULE_DESCRIPTION("DRM driver for Sitronix ST7703 based MIPI DSI panels");
MODULE_LICENSE("GPL v2");