---
MAINTAINERS | 1 +
drivers/gpu/drm/panel/Kconfig | 13 +
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-samsung-s6e3fc2x01.c | 385 +++++++++++++++++++++++
4 files changed, 400 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 42be36b42c29b..a3296756f5ca3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8065,6 +8065,7 @@ DRM DRIVER FOR SAMSUNG S6E3FC2X01 DDIC
M: David Heidelberg <[email protected]>
S: Maintained
F: Documentation/devicetree/bindings/display/panel/samsung,s6e3fc2x01.yaml
+F: drivers/gpu/drm/panel/panel-samsung-s6e3fc2x01.c
DRM DRIVER FOR SAMSUNG S6E3HA8 PANELS
M: Dzmitry Sankouski <[email protected]>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 045ffb2ccd0f0..fadb7f397837e 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -801,6 +801,19 @@ config DRM_PANEL_SAMSUNG_S6D7AA0
select DRM_MIPI_DSI
select VIDEOMODE_HELPERS
+config DRM_PANEL_SAMSUNG_S6E3FC2X01
+ tristate "Samsung S6E3FC2X01 DSI panel controller"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ select VIDEOMODE_HELPERS
+ help
+ Say Y or M here if you want to enable support for the
+ Samsung S6E3FC2 DDIC and connected MIPI DSI panel.
+ Currently supported panels:
+
+ Samsung AMS641RW (found in the OnePlus 6T smartphone)
+
config DRM_PANEL_SAMSUNG_S6E3HA2
tristate "Samsung S6E3HA2 DSI video mode panel"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 0356775a443ad..ae56f64982cfb 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -79,6 +79,7 @@ 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-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3FC2X01) += panel-samsung-s6e3fc2x01.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA8) += panel-samsung-s6e3ha8.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3fc2x01.c
b/drivers/gpu/drm/panel/panel-samsung-s6e3fc2x01.c
new file mode 100644
index 0000000000000..e63080204af77
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e3fc2x01.c
@@ -0,0 +1,385 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022 Nia Espera <[email protected]>
+ * Copyright (c) 2025 David Heidelberg <[email protected]>
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/swab.h>
+#include <linux/backlight.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>
+
+#define MCS_ELVSS_ON 0xb1
+
+struct samsung_s6e3fc2x01 {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct regulator_bulk_data *supplies;
+ struct gpio_desc *reset_gpio;
+};
+
+static const struct regulator_bulk_data s6e3fc2x01_supplies[] = {
+ { .supply = "vddio" },
+ { .supply = "vci" },
+ { .supply = "poc" },
+};
+
+static inline
+struct samsung_s6e3fc2x01 *to_samsung_s6e3fc2x01(struct drm_panel *panel)
+{
+ return container_of(panel, struct samsung_s6e3fc2x01, panel);
+}
+
+#define s6e3fc2x01_test_key_on_lvl1(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0x9f, 0xa5, 0xa5)
+#define s6e3fc2x01_test_key_off_lvl1(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0x9f, 0x5a, 0x5a)
+#define s6e3fc2x01_test_key_on_lvl2(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0x5a, 0x5a)
+#define s6e3fc2x01_test_key_off_lvl2(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0xa5, 0xa5)
+#define s6e3fc2x01_test_key_on_lvl3(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xfc, 0x5a, 0x5a)
+#define s6e3fc2x01_test_key_off_lvl3(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xfc, 0xa5, 0xa5)
+
+static void s6e3fc2x01_reset(struct samsung_s6e3fc2x01 *ctx)
+{
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ usleep_range(5000, 6000);
+}
+
+static int s6e3fc2x01_on(struct samsung_s6e3fc2x01 *ctx)
+{
+ struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+ s6e3fc2x01_test_key_on_lvl1(&dsi_ctx);
+
+ mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+
+ mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
+
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xff, 0x0a);
+ mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
+
+ s6e3fc2x01_test_key_off_lvl1(&dsi_ctx);
+
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xcd, 0x01);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+
+ mipi_dsi_usleep_range(&dsi_ctx, 15000, 16000);
+
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xff, 0x0f);
+ mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
+
+ s6e3fc2x01_test_key_on_lvl1(&dsi_ctx);
+ mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+ s6e3fc2x01_test_key_off_lvl1(&dsi_ctx);
+
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xeb, 0x17,
+ 0x41, 0x92,
+ 0x0e, 0x10,
+ 0x82, 0x5a);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+
+ /* Column & Page Address Setting */
+ mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0x0000, 0x0437);
+ mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 0x0923);
+
+ /* Horizontal & Vertical sync Setting */
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x09);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe8, 0x10, 0x30);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+
+ s6e3fc2x01_test_key_on_lvl3(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe3, 0x88);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xed, 0x67);
+ s6e3fc2x01_test_key_off_lvl3(&dsi_ctx);
+
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x07);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb7, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x08);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb7, 0x12);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
0x20);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
+ mipi_dsi_usleep_range(&dsi_ctx, 1000, 2000);
+
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ELVSS_ON, 0x00, 0x01);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb3, 0x00, 0xc1);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xff, 0x78);
+ mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
+
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x81, 0x90);
+ mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
+
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ELVSS_ON, 0xc6, 0x00, 0x00,
+ 0x21, 0xed, 0x02, 0x08, 0x06, 0xc1, 0x27,
+ 0xfc, 0xdc, 0xe4, 0x00, 0xd9, 0xe6, 0xe7,
+ 0x00, 0xfc, 0xff, 0xea);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ELVSS_ON, 0x00, 0x00);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+
+ mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
+
+ return dsi_ctx.accum_err;
+}
+
+static int s6e3fc2x01_enable(struct drm_panel *panel)
+{
+ struct samsung_s6e3fc2x01 *ctx = to_samsung_s6e3fc2x01(panel);
+ struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+ s6e3fc2x01_test_key_on_lvl1(&dsi_ctx);
+ mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+ s6e3fc2x01_test_key_off_lvl1(&dsi_ctx);
+
+ return dsi_ctx.accum_err;
+}
+
+static int s6e3fc2x01_off(struct samsung_s6e3fc2x01 *ctx)
+{
+ struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+ s6e3fc2x01_test_key_on_lvl1(&dsi_ctx);
+
+ mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+
+ mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
+
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_usleep_range(&dsi_ctx, 16000, 17000);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x50);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb9, 0x82);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+ mipi_dsi_usleep_range(&dsi_ctx, 16000, 17000);
+
+ mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+
+ s6e3fc2x01_test_key_off_lvl1(&dsi_ctx);
+
+ s6e3fc2x01_test_key_on_lvl2(&dsi_ctx);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x05);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf4, 0x01);
+ s6e3fc2x01_test_key_off_lvl2(&dsi_ctx);
+ mipi_dsi_msleep(&dsi_ctx, 160);
+
+ return dsi_ctx.accum_err;
+}
+
+static int s6e3fc2x01_disable(struct drm_panel *panel)
+{
+ struct samsung_s6e3fc2x01 *ctx = to_samsung_s6e3fc2x01(panel);
+
+ s6e3fc2x01_off(ctx);
+
+ return 0;
+}
+
+static int s6e3fc2x01_prepare(struct drm_panel *panel)
+{
+ struct samsung_s6e3fc2x01 *ctx = to_samsung_s6e3fc2x01(panel);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(s6e3fc2x01_supplies),
ctx->supplies);
+ if (ret < 0)
+ return ret;
+
+ s6e3fc2x01_reset(ctx);
+
+ ret = s6e3fc2x01_on(ctx);
+ if (ret < 0) {
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(s6e3fc2x01_supplies),
ctx->supplies);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int s6e3fc2x01_unprepare(struct drm_panel *panel)
+{
+ struct samsung_s6e3fc2x01 *ctx = to_samsung_s6e3fc2x01(panel);
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(s6e3fc2x01_supplies), ctx->supplies);
+
+ return 0;
+}
+
+static const struct drm_display_mode ams641rw_mode = {
+ .clock = (1080 + 72 + 16 + 36) * (2340 + 32 + 4 + 18) * 60 / 1000,
+ .hdisplay = 1080,
+ .hsync_start = 1080 + 72,
+ .hsync_end = 1080 + 72 + 16,
+ .htotal = 1080 + 72 + 16 + 36,
+ .vdisplay = 2340,
+ .vsync_start = 2340 + 32,
+ .vsync_end = 2340 + 32 + 4,
+ .vtotal = 2340 + 32 + 4 + 18,
+ .width_mm = 68,
+ .height_mm = 145,
+};
+
+static int s6e3fc2x01_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ return drm_connector_helper_get_modes_fixed(connector, &ams641rw_mode);
+}
+
+static const struct drm_panel_funcs samsung_s6e3fc2x01_panel_funcs = {
+ .prepare = s6e3fc2x01_prepare,
+ .enable = s6e3fc2x01_enable,
+ .disable = s6e3fc2x01_disable,
+ .unprepare = s6e3fc2x01_unprepare,
+ .get_modes = s6e3fc2x01_get_modes,
+};
+
+static int s6e3fc2x01_panel_bl_update_status(struct backlight_device *bl)
+{
+ struct mipi_dsi_device *dsi = bl_get_data(bl);
+ u16 brightness = backlight_get_brightness(bl);
+ int err;
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ err = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
+ if (err < 0)
+ return err;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ return 0;
+}
+
+static const struct backlight_ops s6e3fc2x01_panel_bl_ops = {
+ .update_status = s6e3fc2x01_panel_bl_update_status,
+};
+
+static struct backlight_device *
+s6e3fc2x01_create_backlight(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ const struct backlight_properties props = {
+ .type = BACKLIGHT_PLATFORM,
+ .brightness = 512,
+ .max_brightness = 1023,
+ };
+
+ return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+ &s6e3fc2x01_panel_bl_ops, &props);
+}
+
+static int s6e3fc2x01_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct samsung_s6e3fc2x01 *ctx;
+ int ret;
+
+ ctx = devm_drm_panel_alloc(dev, struct samsung_s6e3fc2x01, panel,
+ &samsung_s6e3fc2x01_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ if (IS_ERR(ctx))
+ return PTR_ERR(ctx);
+
+ ret = devm_regulator_bulk_get_const(dev,
+ ARRAY_SIZE(s6e3fc2x01_supplies),
+ s6e3fc2x01_supplies,
+ &ctx->supplies);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to get regulators\n");
+
+
+ /* keep the display on for flicker-free experience */
+ ctx->reset_gpio = devm_gpiod_get(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_BURST |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
+
+ ctx->panel.prepare_prev_first = true;
+
+ ctx->panel.backlight = s6e3fc2x01_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 s6e3fc2x01_remove(struct mipi_dsi_device *dsi)
+{
+ struct samsung_s6e3fc2x01 *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 s6e3fc2x01_of_match[] = {
+ { .compatible = "samsung,s6e3fc2x01-ams641rw", .data = &ams641rw_mode },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, s6e3fc2x01_of_match);
+
+static struct mipi_dsi_driver s6e3fc2x01_driver = {
+ .probe = s6e3fc2x01_probe,
+ .remove = s6e3fc2x01_remove,
+ .driver = {
+ .name = "panel-samsung-s6e3fc2x01",
+ .of_match_table = s6e3fc2x01_of_match,
+ },
+};
+module_mipi_dsi_driver(s6e3fc2x01_driver);
+
+MODULE_AUTHOR("David Heidelberg <[email protected]>");
+MODULE_DESCRIPTION("DRM driver for Samsung S6E3FC2X01 DDIC");
+MODULE_LICENSE("GPL");
