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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/array_size.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/property.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>
#include <drm/drm_probe_helper.h>
struct samsung_ltl106hl02 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator *supply;
struct gpio_desc *reset_gpio;
};
static inline struct samsung_ltl106hl02 *to_samsung_ltl106hl02(struct drm_panel *panel)
{
return container_of(panel, struct samsung_ltl106hl02, panel);
}
static void samsung_ltl106hl02_reset(struct samsung_ltl106hl02 *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
usleep_range(2000, 3000);
}
static int samsung_ltl106hl02_prepare(struct drm_panel *panel)
{
struct samsung_ltl106hl02 *ctx = to_samsung_ltl106hl02(panel);
struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
struct device *dev = &ctx->dsi->dev;
int ret;
ret = regulator_enable(ctx->supply);
if (ret < 0) {
dev_err(dev, "failed to enable power supply %d\n", ret);
return ret;
}
if (ctx->reset_gpio)
samsung_ltl106hl02_reset(ctx);
mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 70);
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 5);
return dsi_ctx.accum_err;
}
static int samsung_ltl106hl02_unprepare(struct drm_panel *panel)
{
struct samsung_ltl106hl02 *ctx = to_samsung_ltl106hl02(panel);
struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 50);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 150);
if (ctx->reset_gpio)
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_disable(ctx->supply);
return 0;
}
static const struct drm_display_mode samsung_ltl106hl02_mode = {
.clock = (1920 + 32 + 32 + 64) * (1080 + 6 + 3 + 22) * 60 / 1000,
.hdisplay = 1920,
.hsync_start = 1920 + 32,
.hsync_end = 1920 + 32 + 32,
.htotal = 1920 + 32 + 32 + 64,
.vdisplay = 1080,
.vsync_start = 1080 + 6,
.vsync_end = 1080 + 6 + 3,
.vtotal = 1080 + 6 + 3 + 22,
.width_mm = 235,
.height_mm = 132,
.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
};
static int samsung_ltl106hl02_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
return drm_connector_helper_get_modes_fixed(connector, &samsung_ltl106hl02_mode);
}
static const struct drm_panel_funcs samsung_ltl106hl02_panel_funcs = {
.prepare = samsung_ltl106hl02_prepare,
.unprepare = samsung_ltl106hl02_unprepare,
.get_modes = samsung_ltl106hl02_get_modes,
};
static int samsung_ltl106hl02_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct samsung_ltl106hl02 *ctx;
int ret;
ctx = devm_drm_panel_alloc(dev, struct samsung_ltl106hl02, panel,
&samsung_ltl106hl02_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ctx->supply = devm_regulator_get(dev, "power");
if (IS_ERR(ctx->supply))
return dev_err_probe(dev, PTR_ERR(ctx->supply),
"Failed to get power regulator\n");
ctx->reset_gpio = devm_gpiod_get_optional(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-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 | MIPI_DSI_MODE_LPM;
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return dev_err_probe(dev, ret, "Failed to get backlight\n");
drm_panel_add(&ctx->panel);
ret = devm_mipi_dsi_attach(dev, dsi);
if (ret < 0) {
drm_panel_remove(&ctx->panel);
return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
}
return 0;
}
static void samsung_ltl106hl02_remove(struct mipi_dsi_device *dsi)
{
struct samsung_ltl106hl02 *ctx = mipi_dsi_get_drvdata(dsi);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id samsung_ltl106hl02_of_match[] = {
{ .compatible = "samsung,ltl106hl02-001" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, samsung_ltl106hl02_of_match);
static struct mipi_dsi_driver samsung_ltl106hl02_driver = {
.driver = {
.name = "panel-samsung-ltl106hl02",
.of_match_table = samsung_ltl106hl02_of_match,
},
.probe = samsung_ltl106hl02_probe,
.remove = samsung_ltl106hl02_remove,
};
module_mipi_dsi_driver(samsung_ltl106hl02_driver);
MODULE_AUTHOR("Anton Bambura <jenneron@protonmail.com>");
MODULE_DESCRIPTION("DRM driver for Samsung LTL106HL02 video mode DSI panel");
MODULE_LICENSE("GPL");
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