#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct s6e3fa7_panel {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct gpio_desc *reset_gpio;
};
static inline struct s6e3fa7_panel *to_s6e3fa7_panel(struct drm_panel *panel)
{
return container_of(panel, struct s6e3fa7_panel, panel);
}
static void s6e3fa7_panel_reset(struct s6e3fa7_panel *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(10000, 11000);
}
static int s6e3fa7_panel_on(struct mipi_dsi_device *dsi)
{
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 120);
mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0x5a, 0x5a);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf4,
0xbb, 0x23, 0x19, 0x3a, 0x9f, 0x0f, 0x09, 0xc0,
0x00, 0xb4, 0x37, 0x70, 0x79, 0x69);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf0, 0xa5, 0xa5);
mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
return dsi_ctx.accum_err;
}
static int s6e3fa7_panel_prepare(struct drm_panel *panel)
{
struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
int ret;
s6e3fa7_panel_reset(ctx);
ret = s6e3fa7_panel_on(ctx->dsi);
if (ret < 0)
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
return ret;
}
static int s6e3fa7_panel_unprepare(struct drm_panel *panel)
{
struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
return 0;
}
static int s6e3fa7_panel_disable(struct drm_panel *panel)
{
struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 120);
return dsi_ctx.accum_err;
}
static const struct drm_display_mode s6e3fa7_panel_mode = {
.clock = (1080 + 32 + 32 + 78) * (2220 + 32 + 4 + 78) * 60 / 1000,
.hdisplay = 1080,
.hsync_start = 1080 + 32,
.hsync_end = 1080 + 32 + 32,
.htotal = 1080 + 32 + 32 + 78,
.vdisplay = 2220,
.vsync_start = 2220 + 32,
.vsync_end = 2220 + 32 + 4,
.vtotal = 2220 + 32 + 4 + 78,
.width_mm = 62,
.height_mm = 127,
};
static int s6e3fa7_panel_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &s6e3fa7_panel_mode);
if (!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 const struct drm_panel_funcs s6e3fa7_panel_funcs = {
.prepare = s6e3fa7_panel_prepare,
.unprepare = s6e3fa7_panel_unprepare,
.disable = s6e3fa7_panel_disable,
.get_modes = s6e3fa7_panel_get_modes,
};
static int s6e3fa7_panel_bl_update_status(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness = backlight_get_brightness(bl);
int ret;
ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
if (ret < 0)
return ret;
return 0;
}
static int s6e3fa7_panel_bl_get_brightness(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness;
int ret;
ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
if (ret < 0)
return ret;
return brightness;
}
static const struct backlight_ops s6e3fa7_panel_bl_ops = {
.update_status = s6e3fa7_panel_bl_update_status,
.get_brightness = s6e3fa7_panel_bl_get_brightness,
};
static struct backlight_device *
s6e3fa7_panel_create_backlight(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
const struct backlight_properties props = {
.type = BACKLIGHT_RAW,
.brightness = 1023,
.max_brightness = 1023,
};
return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
&s6e3fa7_panel_bl_ops, &props);
}
static int s6e3fa7_panel_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct s6e3fa7_panel *ctx;
int ret;
ctx = devm_drm_panel_alloc(dev, struct s6e3fa7_panel, panel,
&s6e3fa7_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ctx->reset_gpio = devm_gpiod_get(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-gpios\n");
ctx->dsi = dsi;
mipi_dsi_set_drvdata(dsi, ctx);
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
ctx->panel.prepare_prev_first = true;
ctx->panel.backlight = s6e3fa7_panel_create_backlight(dsi);
if (IS_ERR(ctx->panel.backlight))
return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
"Failed to create backlight\n");
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void s6e3fa7_panel_remove(struct mipi_dsi_device *dsi)
{
struct s6e3fa7_panel *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 s6e3fa7_panel_of_match[] = {
{ .compatible = "samsung,s6e3fa7-ams559nk06" },
{ }
};
MODULE_DEVICE_TABLE(of, s6e3fa7_panel_of_match);
static struct mipi_dsi_driver s6e3fa7_panel_driver = {
.probe = s6e3fa7_panel_probe,
.remove = s6e3fa7_panel_remove,
.driver = {
.name = "panel-samsung-s6e3fa7",
.of_match_table = s6e3fa7_panel_of_match,
},
};
module_mipi_dsi_driver(s6e3fa7_panel_driver);
MODULE_AUTHOR("Richard Acayan <mailingradian@gmail.com>");
MODULE_DESCRIPTION("DRM driver for Samsung S6E3FA7 command mode DSI panel");
MODULE_LICENSE("GPL");
