// SPDX-License-Identifier: GPL-2.0
/*
* Driver for panels based on Himax HX8394 controller, such as:
*
* - HannStar HSD060BHW4 5.99" MIPI-DSI panel
*
* Copyright (C) 2021 Kamil Trzciński
*
* Based on drivers/gpu/drm/panel/panel-sitronix-st7703.c
* Copyright (C) Purism SPC 2019
*/
#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/of.h>
#include <linux/regulator/consumer.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-himax-hx8394"
/* Manufacturer specific commands sent via DSI, listed in HX8394-F datasheet */
#define HX8394_CMD_SETSEQUENCE 0xb0
#define HX8394_CMD_SETPOWER 0xb1
#define HX8394_CMD_SETDISP 0xb2
#define HX8394_CMD_SETCYC 0xb4
#define HX8394_CMD_SETVCOM 0xb6
#define HX8394_CMD_SETTE 0xb7
#define HX8394_CMD_SETSENSOR 0xb8
#define HX8394_CMD_SETEXTC 0xb9
#define HX8394_CMD_SETMIPI 0xba
#define HX8394_CMD_SETOTP 0xbb
#define HX8394_CMD_SETREGBANK 0xbd
#define HX8394_CMD_UNKNOWN5 0xbf
#define HX8394_CMD_UNKNOWN1 0xc0
#define HX8394_CMD_SETDGCLUT 0xc1
#define HX8394_CMD_SETID 0xc3
#define HX8394_CMD_SETDDB 0xc4
#define HX8394_CMD_UNKNOWN2 0xc6
#define HX8394_CMD_SETCABC 0xc9
#define HX8394_CMD_SETCABCGAIN 0xca
#define HX8394_CMD_SETPANEL 0xcc
#define HX8394_CMD_SETOFFSET 0xd2
#define HX8394_CMD_SETGIP0 0xd3
#define HX8394_CMD_UNKNOWN3 0xd4
#define HX8394_CMD_SETGIP1 0xd5
#define HX8394_CMD_SETGIP2 0xd6
#define HX8394_CMD_SETGPO 0xd6
#define HX8394_CMD_UNKNOWN4 0xd8
#define HX8394_CMD_SETSCALING 0xdd
#define HX8394_CMD_SETIDLE 0xdf
#define HX8394_CMD_SETGAMMA 0xe0
#define HX8394_CMD_SETCHEMODE_DYN 0xe4
#define HX8394_CMD_SETCHE 0xe5
#define HX8394_CMD_SETCESEL 0xe6
#define HX8394_CMD_SET_SP_CMD 0xe9
#define HX8394_CMD_SETREADINDEX 0xfe
#define HX8394_CMD_GETSPIREAD 0xff
struct hx8394 {
struct device *dev;
struct drm_panel panel;
struct gpio_desc *reset_gpio;
struct regulator *vcc;
struct regulator *iovcc;
enum drm_panel_orientation orientation;
const struct hx8394_panel_desc *desc;
};
struct hx8394_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 hx8394 *ctx);
};
static inline struct hx8394 *panel_to_hx8394(struct drm_panel *panel)
{
return container_of(panel, struct hx8394, panel);
}
static int hsd060bhw4_init_sequence(struct hx8394 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
/* 5.19.8 SETEXTC: Set extension command (B9h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETEXTC,
0xff, 0x83, 0x94);
/* 5.19.2 SETPOWER: Set power (B1h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
0x48, 0x11, 0x71, 0x09, 0x32, 0x24, 0x71, 0x31, 0x55, 0x30);
/* 5.19.9 SETMIPI: Set MIPI control (BAh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETMIPI,
0x63, 0x03, 0x68, 0x6b, 0xb2, 0xc0);
/* 5.19.3 SETDISP: Set display related register (B2h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETDISP,
0x00, 0x80, 0x78, 0x0c, 0x07);
/* 5.19.4 SETCYC: Set display waveform cycles (B4h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETCYC,
0x12, 0x63, 0x12, 0x63, 0x12, 0x63, 0x01, 0x0c, 0x7c, 0x55,
0x00, 0x3f, 0x12, 0x6b, 0x12, 0x6b, 0x12, 0x6b, 0x01, 0x0c,
0x7c);
/* 5.19.19 SETGIP0: Set GIP Option0 (D3h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP0,
0x00, 0x00, 0x00, 0x00, 0x3c, 0x1c, 0x00, 0x00, 0x32, 0x10,
0x09, 0x00, 0x09, 0x32, 0x15, 0xad, 0x05, 0xad, 0x32, 0x00,
0x00, 0x00, 0x00, 0x37, 0x03, 0x0b, 0x0b, 0x37, 0x00, 0x00,
0x00, 0x0c, 0x40);
/* 5.19.20 Set GIP Option1 (D5h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP1,
0x19, 0x19, 0x18, 0x18, 0x1b, 0x1b, 0x1a, 0x1a, 0x00, 0x01,
0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x20, 0x21, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x24, 0x25, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
/* 5.19.21 Set GIP Option2 (D6h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP2,
0x18, 0x18, 0x19, 0x19, 0x1b, 0x1b, 0x1a, 0x1a, 0x07, 0x06,
0x05, 0x04, 0x03, 0x02, 0x01, 0x00, 0x25, 0x24, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x21, 0x20, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
/* 5.19.25 SETGAMMA: Set gamma curve related setting (E0h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGAMMA,
0x00, 0x04, 0x0c, 0x12, 0x14, 0x18, 0x1a, 0x18, 0x31, 0x3f,
0x4d, 0x4c, 0x54, 0x65, 0x6b, 0x70, 0x7f, 0x82, 0x7e, 0x8a,
0x99, 0x4a, 0x48, 0x49, 0x4b, 0x4a, 0x4c, 0x4b, 0x7f, 0x00,
0x04, 0x0c, 0x11, 0x13, 0x17, 0x1a, 0x18, 0x31,
0x3f, 0x4d, 0x4c, 0x54, 0x65, 0x6b, 0x70, 0x7f,
0x82, 0x7e, 0x8a, 0x99, 0x4a, 0x48, 0x49, 0x4b,
0x4a, 0x4c, 0x4b, 0x7f);
/* 5.19.17 SETPANEL (CCh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPANEL,
0x0b);
/* Unknown command, not listed in the HX8394-F datasheet */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN1,
0x1f, 0x31);
/* 5.19.5 SETVCOM: Set VCOM voltage (B6h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETVCOM,
0x7d, 0x7d);
/* Unknown command, not listed in the HX8394-F datasheet */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN3,
0x02);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x01);
/* 5.19.2 SETPOWER: Set power (B1h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
0x00);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x00);
/* Unknown command, not listed in the HX8394-F datasheet */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN3,
0xed);
return 0;
}
static const struct drm_display_mode hsd060bhw4_mode = {
.hdisplay = 720,
.hsync_start = 720 + 40,
.hsync_end = 720 + 40 + 46,
.htotal = 720 + 40 + 46 + 40,
.vdisplay = 1440,
.vsync_start = 1440 + 9,
.vsync_end = 1440 + 9 + 7,
.vtotal = 1440 + 9 + 7 + 7,
.clock = 74250,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 68,
.height_mm = 136,
};
static const struct hx8394_panel_desc hsd060bhw4_desc = {
.mode = &hsd060bhw4_mode,
.lanes = 4,
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST,
.format = MIPI_DSI_FMT_RGB888,
.init_sequence = hsd060bhw4_init_sequence,
};
static int powkiddy_x55_init_sequence(struct hx8394 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
/* 5.19.8 SETEXTC: Set extension command (B9h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETEXTC,
0xff, 0x83, 0x94);
/* 5.19.9 SETMIPI: Set MIPI control (BAh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETMIPI,
0x63, 0x03, 0x68, 0x6b, 0xb2, 0xc0);
/* 5.19.2 SETPOWER: Set power (B1h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
0x48, 0x12, 0x72, 0x09, 0x32, 0x54, 0x71, 0x71, 0x57, 0x47);
/* 5.19.3 SETDISP: Set display related register (B2h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETDISP,
0x00, 0x80, 0x64, 0x2c, 0x16, 0x2f);
/* 5.19.4 SETCYC: Set display waveform cycles (B4h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETCYC,
0x73, 0x74, 0x73, 0x74, 0x73, 0x74, 0x01, 0x0c, 0x86, 0x75,
0x00, 0x3f, 0x73, 0x74, 0x73, 0x74, 0x73, 0x74, 0x01, 0x0c,
0x86);
/* 5.19.5 SETVCOM: Set VCOM voltage (B6h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETVCOM,
0x6e, 0x6e);
/* 5.19.19 SETGIP0: Set GIP Option0 (D3h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP0,
0x00, 0x00, 0x07, 0x07, 0x40, 0x07, 0x0c, 0x00, 0x08, 0x10,
0x08, 0x00, 0x08, 0x54, 0x15, 0x0a, 0x05, 0x0a, 0x02, 0x15,
0x06, 0x05, 0x06, 0x47, 0x44, 0x0a, 0x0a, 0x4b, 0x10, 0x07,
0x07, 0x0c, 0x40);
/* 5.19.20 Set GIP Option1 (D5h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP1,
0x1c, 0x1c, 0x1d, 0x1d, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05,
0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x24, 0x25, 0x18, 0x18,
0x26, 0x27, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x20, 0x21,
0x18, 0x18, 0x18, 0x18);
/* 5.19.21 Set GIP Option2 (D6h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP2,
0x1c, 0x1c, 0x1d, 0x1d, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02,
0x01, 0x00, 0x0b, 0x0a, 0x09, 0x08, 0x21, 0x20, 0x18, 0x18,
0x27, 0x26, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x25, 0x24,
0x18, 0x18, 0x18, 0x18);
/* 5.19.25 SETGAMMA: Set gamma curve related setting (E0h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGAMMA,
0x00, 0x0a, 0x15, 0x1b, 0x1e, 0x21, 0x24, 0x22, 0x47, 0x56,
0x65, 0x66, 0x6e, 0x82, 0x88, 0x8b, 0x9a, 0x9d, 0x98, 0xa8,
0xb9, 0x5d, 0x5c, 0x61, 0x66, 0x6a, 0x6f, 0x7f, 0x7f, 0x00,
0x0a, 0x15, 0x1b, 0x1e, 0x21, 0x24, 0x22, 0x47, 0x56, 0x65,
0x65, 0x6e, 0x81, 0x87, 0x8b, 0x98, 0x9d, 0x99, 0xa8, 0xba,
0x5d, 0x5d, 0x62, 0x67, 0x6b, 0x72, 0x7f, 0x7f);
/* Unknown command, not listed in the HX8394-F datasheet */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN1,
0x1f, 0x31);
/* 5.19.17 SETPANEL (CCh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPANEL,
0x0b);
/* Unknown command, not listed in the HX8394-F datasheet */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN3,
0x02);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x02);
/* Unknown command, not listed in the HX8394-F datasheet */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN4,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x00);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x01);
/* 5.19.2 SETPOWER: Set power (B1h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
0x00);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x00);
/* Unknown command, not listed in the HX8394-F datasheet */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN5,
0x40, 0x81, 0x50, 0x00, 0x1a, 0xfc, 0x01);
/* Unknown command, not listed in the HX8394-F datasheet */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN2,
0xed);
return 0;
}
static const struct drm_display_mode powkiddy_x55_mode = {
.hdisplay = 720,
.hsync_start = 720 + 44,
.hsync_end = 720 + 44 + 20,
.htotal = 720 + 44 + 20 + 20,
.vdisplay = 1280,
.vsync_start = 1280 + 12,
.vsync_end = 1280 + 12 + 10,
.vtotal = 1280 + 12 + 10 + 10,
.clock = 63290,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 67,
.height_mm = 121,
};
static const struct hx8394_panel_desc powkiddy_x55_desc = {
.mode = &powkiddy_x55_mode,
.lanes = 4,
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET,
.format = MIPI_DSI_FMT_RGB888,
.init_sequence = powkiddy_x55_init_sequence,
};
static int mchp_ac40t08a_init_sequence(struct hx8394 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
/* DCS commands do not seem to be sent correclty without this delay */
msleep(20);
/* 5.19.8 SETEXTC: Set extension command (B9h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETEXTC,
0xff, 0x83, 0x94);
/* 5.19.9 SETMIPI: Set MIPI control (BAh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETMIPI,
0x63, 0x03, 0x68, 0x6b, 0xb2, 0xc0);
/* 5.19.2 SETPOWER: Set power (B1h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
0x48, 0x12, 0x72, 0x09, 0x32, 0x54,
0x71, 0x71, 0x57, 0x47);
/* 5.19.3 SETDISP: Set display related register (B2h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETDISP,
0x00, 0x80, 0x64, 0x0c, 0x0d, 0x2f);
/* 5.19.4 SETCYC: Set display waveform cycles (B4h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETCYC,
0x73, 0x74, 0x73, 0x74, 0x73, 0x74,
0x01, 0x0c, 0x86, 0x75, 0x00, 0x3f,
0x73, 0x74, 0x73, 0x74, 0x73, 0x74,
0x01, 0x0c, 0x86);
/* 5.19.5 SETVCOM: Set VCOM voltage (B6h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETVCOM,
0x6e, 0x6e);
/* 5.19.19 SETGIP0: Set GIP Option0 (D3h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP0,
0x00, 0x00, 0x07, 0x07, 0x40, 0x07,
0x0c, 0x00, 0x08, 0x10, 0x08, 0x00,
0x08, 0x54, 0x15, 0x0a, 0x05, 0x0a,
0x02, 0x15, 0x06, 0x05, 0x06, 0x47,
0x44, 0x0a, 0x0a, 0x4b, 0x10, 0x07,
0x07, 0x0c, 0x40);
/* 5.19.20 Set GIP Option1 (D5h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP1,
0x1c, 0x1c, 0x1d, 0x1d, 0x00, 0x01,
0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x24, 0x25,
0x18, 0x18, 0x26, 0x27, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x20, 0x21, 0x18, 0x18,
0x18, 0x18);
/* 5.19.21 Set GIP Option2 (D6h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP2,
0x1c, 0x1c, 0x1d, 0x1d, 0x07, 0x06,
0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
0x0b, 0x0a, 0x09, 0x08, 0x21, 0x20,
0x18, 0x18, 0x27, 0x26, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
0x18, 0x18, 0x25, 0x24, 0x18, 0x18,
0x18, 0x18);
/* 5.19.25 SETGAMMA: Set gamma curve related setting (E0h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETGAMMA,
0x00, 0x0a, 0x15, 0x1b, 0x1e, 0x21,
0x24, 0x22, 0x47, 0x56, 0x65, 0x66,
0x6e, 0x82, 0x88, 0x8b, 0x9a, 0x9d,
0x98, 0xa8, 0xb9, 0x5d, 0x5c, 0x61,
0x66, 0x6a, 0x6f, 0x7f, 0x7f, 0x00,
0x0a, 0x15, 0x1b, 0x1e, 0x21, 0x24,
0x22, 0x47, 0x56, 0x65, 0x65, 0x6e,
0x81, 0x87, 0x8b, 0x98, 0x9d, 0x99,
0xa8, 0xba, 0x5d, 0x5d, 0x62, 0x67,
0x6b, 0x72, 0x7f, 0x7f);
/* Unknown command, not listed in the HX8394-F datasheet (C0H) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN1,
0x1f, 0x73);
/* Set CABC control (C9h)*/
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETCABC,
0x76, 0x00, 0x30);
/* 5.19.17 SETPANEL (CCh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPANEL,
0x0b);
/* Unknown command, not listed in the HX8394-F datasheet (D4h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN3,
0x02);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x02);
/* 5.19.11 Set register bank (D8h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN4,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x00);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x01);
/* 5.19.2 SETPOWER: Set power (B1h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
0x00);
/* 5.19.11 Set register bank (BDh) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK,
0x00);
/* Unknown command, not listed in the HX8394-F datasheet (C6h) */
mipi_dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN2,
0xed);
return 0;
}
static const struct drm_display_mode mchp_ac40t08a_mode = {
.hdisplay = 720,
.hsync_start = 720 + 12,
.hsync_end = 720 + 12 + 24,
.htotal = 720 + 12 + 12 + 24,
.vdisplay = 1280,
.vsync_start = 1280 + 13,
.vsync_end = 1280 + 14,
.vtotal = 1280 + 14 + 13,
.clock = 60226,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 76,
.height_mm = 132,
};
static const struct hx8394_panel_desc mchp_ac40t08a_desc = {
.mode = &mchp_ac40t08a_mode,
.lanes = 4,
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST,
.format = MIPI_DSI_FMT_RGB888,
.init_sequence = mchp_ac40t08a_init_sequence,
};
static int hx8394_enable(struct drm_panel *panel)
{
struct hx8394 *ctx = panel_to_hx8394(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
ret = ctx->desc->init_sequence(ctx);
if (ret) {
dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
return ret;
}
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret) {
dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
return ret;
}
/* Panel is operational 120 msec after reset */
msleep(120);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret) {
dev_err(ctx->dev, "Failed to turn on the display: %d\n", ret);
goto sleep_in;
}
return 0;
sleep_in:
/* This will probably fail, but let's try orderly power off anyway. */
if (!mipi_dsi_dcs_enter_sleep_mode(dsi))
msleep(50);
return ret;
}
static int hx8394_disable(struct drm_panel *panel)
{
struct hx8394 *ctx = panel_to_hx8394(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret) {
dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
return ret;
}
msleep(50); /* about 3 frames */
return 0;
}
static int hx8394_unprepare(struct drm_panel *panel)
{
struct hx8394 *ctx = panel_to_hx8394(panel);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_disable(ctx->iovcc);
regulator_disable(ctx->vcc);
return 0;
}
static int hx8394_prepare(struct drm_panel *panel)
{
struct hx8394 *ctx = panel_to_hx8394(panel);
int ret;
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
ret = regulator_enable(ctx->vcc);
if (ret) {
dev_err(ctx->dev, "Failed to enable vcc supply: %d\n", ret);
return ret;
}
ret = regulator_enable(ctx->iovcc);
if (ret) {
dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
goto disable_vcc;
}
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
msleep(180);
return 0;
disable_vcc:
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_disable(ctx->vcc);
return ret;
}
static int hx8394_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct hx8394 *ctx = panel_to_hx8394(panel);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);
if (!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);
return 1;
}
static enum drm_panel_orientation hx8394_get_orientation(struct drm_panel *panel)
{
struct hx8394 *ctx = panel_to_hx8394(panel);
return ctx->orientation;
}
static const struct drm_panel_funcs hx8394_drm_funcs = {
.disable = hx8394_disable,
.unprepare = hx8394_unprepare,
.prepare = hx8394_prepare,
.enable = hx8394_enable,
.get_modes = hx8394_get_modes,
.get_orientation = hx8394_get_orientation,
};
static int hx8394_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct hx8394 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ctx->reset_gpio))
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
"Failed to get reset gpio\n");
ret = of_drm_get_panel_orientation(dev->of_node, &ctx->orientation);
if (ret < 0) {
dev_err(dev, "%pOF: failed to get orientation %d\n", dev->of_node, ret);
return ret;
}
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, &hx8394_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_probe(dev, ret, "mipi_dsi_attach failed\n");
drm_panel_remove(&ctx->panel);
return ret;
}
dev_dbg(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);
return 0;
}
static void hx8394_remove(struct mipi_dsi_device *dsi)
{
struct hx8394 *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
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);
}
static const struct of_device_id hx8394_of_match[] = {
{ .compatible = "hannstar,hsd060bhw4", .data = &hsd060bhw4_desc },
{ .compatible = "powkiddy,x55-panel", .data = &powkiddy_x55_desc },
{ .compatible = "microchip,ac40t08a-mipi-panel", .data = &mchp_ac40t08a_desc },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, hx8394_of_match);
static struct mipi_dsi_driver hx8394_driver = {
.probe = hx8394_probe,
.remove = hx8394_remove,
.driver = {
.name = DRV_NAME,
.of_match_table = hx8394_of_match,
},
};
module_mipi_dsi_driver(hx8394_driver);
MODULE_AUTHOR("Kamil Trzciński <[email protected]>");
MODULE_DESCRIPTION("DRM driver for Himax HX8394 based MIPI DSI panels");
MODULE_LICENSE("GPL");
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