[2/3] drm/panel: add samsung s6e3fa7 panel driver

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 8f3783742208..a693b03f680e 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -577,6 +577,15 @@  config DRM_PANEL_SAMSUNG_DB7430
 	  DB7430 DPI display controller used in such devices as the
 	  LMS397KF04 480x800 DPI panel.
 
+config DRM_PANEL_SAMSUNG_S6E3FA7
+	tristate "Samsung S6E3FA7 panel driver"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for the Samsung S6E3FA7
+	  1920x2220 panel.
+
 config DRM_PANEL_SAMSUNG_S6D16D0
 	tristate "Samsung S6D16D0 DSI video mode panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index d94a644d0a6c..560b62129f68 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -59,6 +59,7 @@  obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D16D0) += panel-samsung-s6d16d0.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D27A1) += panel-samsung-s6d27a1.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D7AA0) += panel-samsung-s6d7aa0.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3FA7) += panel-samsung-s6e3fa7.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0) += panel-samsung-s6e63m0.o
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3fa7.c b/drivers/gpu/drm/panel/panel-samsung-s6e3fa7.c
new file mode 100644
index 000000000000..10bc8fb5f1f9
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e3fa7.c
@@ -0,0 +1,285 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for the Samsung S6E3FA7 panel.
+ *
+ * Copyright (c) 2022-2024, The Linux Foundation. All rights reserved.
+ * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ */
+
+#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 s6e3fa7_panel *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	int ret;
+
+	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
+		return ret;
+	}
+	msleep(120);
+
+	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set tear on: %d\n", ret);
+		return ret;
+	}
+
+	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+	mipi_dsi_dcs_write_seq(dsi, 0xf4,
+			       0xbb, 0x23, 0x19, 0x3a, 0x9f, 0x0f, 0x09, 0xc0,
+			       0x00, 0xb4, 0x37, 0x70, 0x79, 0x69);
+	mipi_dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
+
+	ret = mipi_dsi_dcs_set_display_on(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set display on: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int s6e3fa7_panel_prepare(struct drm_panel *panel)
+{
+	struct s6e3fa7_panel *ctx = to_s6e3fa7_panel(panel);
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	s6e3fa7_panel_reset(ctx);
+
+	ret = s6e3fa7_panel_on(ctx);
+	if (ret < 0) {
+		dev_err(dev, "Failed to initialize panel: %d\n", ret);
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+		return ret;
+	}
+
+	return 0;
+}
+
+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 device *dev = &dsi->dev;
+	int ret;
+
+	ret = mipi_dsi_dcs_set_display_off(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set display off: %d\n", ret);
+		return ret;
+	}
+
+	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+	if (ret < 0) {
+		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
+		return ret;
+	}
+	msleep(120);
+
+	return 0;
+}
+
+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_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	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;
+
+	drm_panel_init(&ctx->panel, dev, &s6e3fa7_panel_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+	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" },
+	{ /* sentinel */ }
+};
+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");