#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <video/mipi_display.h>
#define ILI9805_EXTCMD_CMD_SET_ENABLE_REG (0xff)
#define ILI9805_SETEXTC_PARAMETER1 (0xff)
#define ILI9805_SETEXTC_PARAMETER2 (0x98)
#define ILI9805_SETEXTC_PARAMETER3 (0x05)
#define ILI9805_INSTR(_delay, ...) { \
.delay = (_delay), \
.len = sizeof((u8[]) {__VA_ARGS__}), \
.data = (u8[]){__VA_ARGS__} \
}
struct ili9805_instr {
size_t len;
const u8 *data;
u32 delay;
};
struct ili9805_desc {
const char *name;
const struct ili9805_instr *init;
const size_t init_length;
const struct drm_display_mode *mode;
u32 width_mm;
u32 height_mm;
};
struct ili9805 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
const struct ili9805_desc *desc;
struct regulator *dvdd;
struct regulator *avdd;
struct gpio_desc *reset_gpio;
};
static const struct ili9805_instr gpm1780a0_init[] = {
ILI9805_INSTR(100, ILI9805_EXTCMD_CMD_SET_ENABLE_REG, ILI9805_SETEXTC_PARAMETER1,
ILI9805_SETEXTC_PARAMETER2, ILI9805_SETEXTC_PARAMETER3),
ILI9805_INSTR(100, 0xFD, 0x0F, 0x10, 0x44, 0x00),
ILI9805_INSTR(0, 0xf8, 0x18, 0x02, 0x02, 0x18, 0x02, 0x02, 0x30, 0x00,
0x00, 0x30, 0x00, 0x00, 0x30, 0x00, 0x00),
ILI9805_INSTR(0, 0xB8, 0x62),
ILI9805_INSTR(0, 0xF1, 0x00),
ILI9805_INSTR(0, 0xF2, 0x00, 0x58, 0x40),
ILI9805_INSTR(0, 0xF3, 0x60, 0x83, 0x04),
ILI9805_INSTR(0, 0xFC, 0x04, 0x0F, 0x01),
ILI9805_INSTR(0, 0xEB, 0x08, 0x0F),
ILI9805_INSTR(0, 0xe0, 0x00, 0x08, 0x0d, 0x0e, 0x0e, 0x0d, 0x0a, 0x08, 0x04,
0x08, 0x0d, 0x0f, 0x0b, 0x1c, 0x14, 0x0a),
ILI9805_INSTR(0, 0xe1, 0x00, 0x08, 0x0d, 0x0e, 0x0e, 0x0d, 0x0a, 0x08, 0x04,
0x08, 0x0d, 0x0f, 0x0b, 0x1c, 0x14, 0x0a),
ILI9805_INSTR(10, 0xc1, 0x13, 0x39, 0x19, 0x06),
ILI9805_INSTR(10, 0xc7, 0xe5),
ILI9805_INSTR(10, 0xB1, 0x00, 0x12, 0x14),
ILI9805_INSTR(10, 0xB4, 0x02),
ILI9805_INSTR(0, 0xBB, 0x14, 0x55),
ILI9805_INSTR(0, MIPI_DCS_SET_ADDRESS_MODE, 0x08),
ILI9805_INSTR(0, MIPI_DCS_SET_PIXEL_FORMAT, 0x77),
ILI9805_INSTR(0, 0x20),
ILI9805_INSTR(0, 0xB0, 0x01),
ILI9805_INSTR(0, 0xB6, 0x31, 0x00, 0xef),
ILI9805_INSTR(0, 0xDF, 0x23),
ILI9805_INSTR(0, 0xB9, 0x02, 0x00),
};
static const struct ili9805_instr tm041xdhg01_init[] = {
ILI9805_INSTR(100, ILI9805_EXTCMD_CMD_SET_ENABLE_REG, ILI9805_SETEXTC_PARAMETER1,
ILI9805_SETEXTC_PARAMETER2, ILI9805_SETEXTC_PARAMETER3),
ILI9805_INSTR(100, 0xFD, 0x0F, 0x13, 0x44, 0x00),
ILI9805_INSTR(0, 0xf8, 0x18, 0x02, 0x02, 0x18, 0x02, 0x02, 0x30, 0x01,
0x01, 0x30, 0x01, 0x01, 0x30, 0x01, 0x01),
ILI9805_INSTR(0, 0xB8, 0x74),
ILI9805_INSTR(0, 0xF1, 0x00),
ILI9805_INSTR(0, 0xF2, 0x00, 0x58, 0x40),
ILI9805_INSTR(0, 0xFC, 0x04, 0x0F, 0x01),
ILI9805_INSTR(0, 0xEB, 0x08, 0x0F),
ILI9805_INSTR(0, 0xe0, 0x01, 0x0d, 0x15, 0x0e, 0x0f, 0x0f, 0x0b, 0x08, 0x04,
0x07, 0x0a, 0x0d, 0x0c, 0x15, 0x0f, 0x08),
ILI9805_INSTR(0, 0xe1, 0x01, 0x0d, 0x15, 0x0e, 0x0f, 0x0f, 0x0b, 0x08, 0x04,
0x07, 0x0a, 0x0d, 0x0c, 0x15, 0x0f, 0x08),
ILI9805_INSTR(10, 0xc1, 0x15, 0x03, 0x03, 0x31),
ILI9805_INSTR(10, 0xB1, 0x00, 0x12, 0x14),
ILI9805_INSTR(10, 0xB4, 0x02),
ILI9805_INSTR(0, 0xBB, 0x14, 0x55),
ILI9805_INSTR(0, MIPI_DCS_SET_ADDRESS_MODE, 0x0a),
ILI9805_INSTR(0, MIPI_DCS_SET_PIXEL_FORMAT, 0x77),
ILI9805_INSTR(0, 0x20),
ILI9805_INSTR(0, 0xB0, 0x00),
ILI9805_INSTR(0, 0xB6, 0x01),
ILI9805_INSTR(0, 0xc2, 0x11),
ILI9805_INSTR(0, 0x51, 0xFF),
ILI9805_INSTR(0, 0x53, 0x24),
ILI9805_INSTR(0, 0x55, 0x00),
};
static inline struct ili9805 *panel_to_ili9805(struct drm_panel *panel)
{
return container_of(panel, struct ili9805, panel);
}
static int ili9805_power_on(struct ili9805 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret;
ret = regulator_enable(ctx->avdd);
if (ret) {
dev_err(dev, "Failed to enable avdd regulator (%d)\n", ret);
return ret;
}
ret = regulator_enable(ctx->dvdd);
if (ret) {
dev_err(dev, "Failed to enable dvdd regulator (%d)\n", ret);
regulator_disable(ctx->avdd);
return ret;
}
gpiod_set_value(ctx->reset_gpio, 0);
usleep_range(5000, 10000);
gpiod_set_value(ctx->reset_gpio, 1);
msleep(120);
return 0;
}
static int ili9805_power_off(struct ili9805 *ctx)
{
gpiod_set_value(ctx->reset_gpio, 0);
regulator_disable(ctx->dvdd);
regulator_disable(ctx->avdd);
return 0;
}
static int ili9805_activate(struct ili9805 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int i, ret;
for (i = 0; i < ctx->desc->init_length; i++) {
const struct ili9805_instr *instr = &ctx->desc->init[i];
ret = mipi_dsi_dcs_write_buffer(ctx->dsi, instr->data, instr->len);
if (ret < 0)
return ret;
if (instr->delay > 0)
msleep(instr->delay);
}
ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
if (ret) {
dev_err(dev, "Failed to exit sleep mode (%d)\n", ret);
return ret;
}
usleep_range(5000, 6000);
ret = mipi_dsi_dcs_set_display_on(ctx->dsi);
if (ret) {
dev_err(dev, "Failed to set display ON (%d)\n", ret);
return ret;
}
return 0;
}
static int ili9805_prepare(struct drm_panel *panel)
{
struct ili9805 *ctx = panel_to_ili9805(panel);
int ret;
ret = ili9805_power_on(ctx);
if (ret)
return ret;
ret = ili9805_activate(ctx);
if (ret) {
ili9805_power_off(ctx);
return ret;
}
return 0;
}
static int ili9805_deactivate(struct ili9805 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret;
ret = mipi_dsi_dcs_set_display_off(ctx->dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display OFF (%d)\n", ret);
return ret;
}
usleep_range(5000, 10000);
ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
if (ret < 0) {
dev_err(dev, "Failed to enter sleep mode (%d)\n", ret);
return ret;
}
return 0;
}
static int ili9805_unprepare(struct drm_panel *panel)
{
struct ili9805 *ctx = panel_to_ili9805(panel);
ili9805_deactivate(ctx);
ili9805_power_off(ctx);
return 0;
}
static const struct drm_display_mode gpm1780a0_timing = {
.clock = 26227,
.hdisplay = 480,
.hsync_start = 480 + 10,
.hsync_end = 480 + 10 + 2,
.htotal = 480 + 10 + 2 + 36,
.vdisplay = 480,
.vsync_start = 480 + 2,
.vsync_end = 480 + 10 + 4,
.vtotal = 480 + 2 + 4 + 10,
};
static const struct drm_display_mode tm041xdhg01_timing = {
.clock = 26227,
.hdisplay = 480,
.hsync_start = 480 + 10,
.hsync_end = 480 + 10 + 2,
.htotal = 480 + 10 + 2 + 36,
.vdisplay = 768,
.vsync_start = 768 + 2,
.vsync_end = 768 + 10 + 4,
.vtotal = 768 + 2 + 4 + 10,
};
static int ili9805_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct ili9805 *ctx = panel_to_ili9805(panel);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);
if (!mode) {
dev_err(&ctx->dsi->dev, "failed to add mode %ux%ux@%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;
drm_mode_probed_add(connector, mode);
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
return 1;
}
static const struct drm_panel_funcs ili9805_funcs = {
.prepare = ili9805_prepare,
.unprepare = ili9805_unprepare,
.get_modes = ili9805_get_modes,
};
static int ili9805_dsi_probe(struct mipi_dsi_device *dsi)
{
struct ili9805 *ctx;
int ret;
ctx = devm_drm_panel_alloc(&dsi->dev, struct ili9805, panel,
&ili9805_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dsi = dsi;
ctx->desc = of_device_get_match_data(&dsi->dev);
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_VIDEO |
MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM |
MIPI_DSI_MODE_VIDEO_SYNC_PULSE | MIPI_DSI_MODE_NO_EOT_PACKET;
dsi->lanes = 2;
ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd");
if (IS_ERR(ctx->dvdd))
return PTR_ERR(ctx->dvdd);
ctx->avdd = devm_regulator_get(&dsi->dev, "avdd");
if (IS_ERR(ctx->avdd))
return PTR_ERR(ctx->avdd);
ctx->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
return PTR_ERR(ctx->reset_gpio);
}
ctx->panel.prepare_prev_first = true;
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(&dsi->dev, "mipi_dsi_attach failed: %d\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void ili9805_dsi_remove(struct mipi_dsi_device *dsi)
{
struct ili9805 *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 ili9805_desc gpm1780a0_desc = {
.init = gpm1780a0_init,
.init_length = ARRAY_SIZE(gpm1780a0_init),
.mode = &gpm1780a0_timing,
.width_mm = 65,
.height_mm = 65,
};
static const struct ili9805_desc tm041xdhg01_desc = {
.init = tm041xdhg01_init,
.init_length = ARRAY_SIZE(tm041xdhg01_init),
.mode = &tm041xdhg01_timing,
.width_mm = 42,
.height_mm = 96,
};
static const struct of_device_id ili9805_of_match[] = {
{ .compatible = "giantplus,gpm1790a0", .data = &gpm1780a0_desc },
{ .compatible = "tianma,tm041xdhg01", .data = &tm041xdhg01_desc },
{ }
};
MODULE_DEVICE_TABLE(of, ili9805_of_match);
static struct mipi_dsi_driver ili9805_dsi_driver = {
.probe = ili9805_dsi_probe,
.remove = ili9805_dsi_remove,
.driver = {
.name = "ili9805-dsi",
.of_match_table = ili9805_of_match,
},
};
module_mipi_dsi_driver(ili9805_dsi_driver);
MODULE_AUTHOR("Matthias Proske <Matthias.Proske@bshg.com>");
MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
MODULE_DESCRIPTION("Ilitek ILI9805 Controller Driver");
MODULE_LICENSE("GPL");
