[PATCH v2 2/2] drm/panel: Add panel for Samsung Galaxy S5

From: Iskren Chernev
Date: Mon Feb 01 2021 - 05:42:20 EST


The Samsung Galaxy S5 uses the samsung s6e3fa2 AMOLED cmd LCD panel.

This driver was generated with [1], with the addition of
mipi_dsi_dcs_set_display_on at the end of the on method.

[1] https://github.com/msm8916-mainline/linux-mdss-dsi-panel-driver-generator

Signed-off-by: Iskren Chernev <iskren.chernev@xxxxxxxxx>
---
drivers/gpu/drm/panel/Kconfig | 6 +
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-samsung-s6e3fa2.c | 299 ++++++++++++++++++
3 files changed, 306 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3fa2.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 4894913936e9..82dff2afd5f1 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -348,6 +348,12 @@ config DRM_PANEL_SAMSUNG_S6D16D0
depends on DRM_MIPI_DSI
select VIDEOMODE_HELPERS

+config DRM_PANEL_SAMSUNG_S6E3FA2
+ tristate "Samsung S6E3FA2 DSI video mode panel"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ select VIDEOMODE_HELPERS
+
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 cae4d976c069..87d3f76f050e 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o
obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D16D0) += panel-samsung-s6d16d0.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3FA2) += panel-samsung-s6e3fa2.o
obj-$(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-s6e3fa2.c b/drivers/gpu/drm/panel/panel-samsung-s6e3fa2.c
new file mode 100644
index 000000000000..8985fccf9792
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e3fa2.c
@@ -0,0 +1,299 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright (c) 2021 Iskren Chernev <iskren.chernev@xxxxxxxxx>
+// Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+// Copyright (c) 2021, The Linux Foundation. All rights reserved.
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+
+struct samsung_s6e3fa2 {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct regulator_bulk_data supplies[2];
+ struct gpio_desc *reset_gpio;
+ bool prepared;
+};
+
+static inline
+struct samsung_s6e3fa2 *to_samsung_s6e3fa2(struct drm_panel *panel)
+{
+ return container_of(panel, struct samsung_s6e3fa2, panel);
+}
+
+#define dsi_generic_write_seq(dsi, seq...) do { \
+ static const u8 d[] = { seq }; \
+ int ret; \
+ ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d)); \
+ if (ret < 0) \
+ return ret; \
+ } while (0)
+
+#define dsi_dcs_write_seq(dsi, seq...) do { \
+ static const u8 d[] = { seq }; \
+ int ret; \
+ ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
+ if (ret < 0) \
+ return ret; \
+ } while (0)
+
+static void samsung_s6e3fa2_reset(struct samsung_s6e3fa2 *ctx)
+{
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ usleep_range(7000, 8000);
+}
+
+static int samsung_s6e3fa2_on(struct samsung_s6e3fa2 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ dsi_generic_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ dsi_generic_write_seq(dsi, 0xfc, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xf2);
+ dsi_dcs_write_seq(dsi, 0xf9);
+ usleep_range(5000, 6000);
+
+ 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(20);
+
+ dsi_generic_write_seq(dsi, 0xca,
+ 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x80, 0x80,
+ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00,
+ 0x00);
+ dsi_generic_write_seq(dsi, 0xb2, 0x00, 0x0e, 0x00, 0x0e);
+ dsi_generic_write_seq(dsi, 0xb6,
+ 0x98, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
+ 0x55, 0x54, 0x20, 0x00, 0x0a, 0xaa, 0xaf, 0x0f,
+ 0x02, 0x22, 0x22, 0x10);
+ dsi_generic_write_seq(dsi, 0xb5, 0x41);
+ dsi_generic_write_seq(dsi, 0xf7, 0x03);
+ dsi_generic_write_seq(dsi, 0xf7, 0x00);
+ dsi_generic_write_seq(dsi, 0xb0, 0x02);
+ dsi_generic_write_seq(dsi, 0xfd, 0x0a);
+ dsi_generic_write_seq(dsi, 0xfe, 0x80);
+ dsi_generic_write_seq(dsi, 0xfe, 0x00);
+ dsi_generic_write_seq(dsi, 0x35, 0x00);
+ dsi_generic_write_seq(dsi, 0xbd, 0x05, 0x02, 0x02);
+ dsi_generic_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+ dsi_generic_write_seq(dsi, 0xfc, 0xa5, 0xa5);
+
+ 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 samsung_s6e3fa2_off(struct samsung_s6e3fa2 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_off(dsi);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set display off: %d\n", ret);
+ return ret;
+ }
+ usleep_range(10000, 11000);
+
+ 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 int samsung_s6e3fa2_prepare(struct drm_panel *panel)
+{
+ struct samsung_s6e3fa2 *ctx = to_samsung_s6e3fa2(panel);
+ struct device *dev = &ctx->dsi->dev;
+ int ret;
+
+ if (ctx->prepared)
+ return 0;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable regulators: %d\n", ret);
+ return ret;
+ }
+
+ samsung_s6e3fa2_reset(ctx);
+
+ ret = samsung_s6e3fa2_on(ctx);
+ if (ret < 0) {
+ dev_err(dev, "Failed to initialize panel: %d\n", ret);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+ return ret;
+ }
+
+ ctx->prepared = true;
+ return 0;
+}
+
+static int samsung_s6e3fa2_unprepare(struct drm_panel *panel)
+{
+ struct samsung_s6e3fa2 *ctx = to_samsung_s6e3fa2(panel);
+ struct device *dev = &ctx->dsi->dev;
+ int ret;
+
+ if (!ctx->prepared)
+ return 0;
+
+ ret = samsung_s6e3fa2_off(ctx);
+ if (ret < 0)
+ dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+
+ ctx->prepared = false;
+ return 0;
+}
+
+static const struct drm_display_mode samsung_s6e3fa2_mode = {
+ .clock = (1080 + 162 + 10 + 36) * (1920 + 13 + 2 + 3) * 60 / 1000,
+ .hdisplay = 1080,
+ .hsync_start = 1080 + 162,
+ .hsync_end = 1080 + 162 + 10,
+ .htotal = 1080 + 162 + 10 + 36,
+ .vdisplay = 1920,
+ .vsync_start = 1920 + 13,
+ .vsync_end = 1920 + 13 + 2,
+ .vtotal = 1920 + 13 + 2 + 3,
+ .width_mm = 65,
+ .height_mm = 115,
+};
+
+static int samsung_s6e3fa2_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct drm_display_mode *mode;
+
+ mode = drm_mode_duplicate(connector->dev, &samsung_s6e3fa2_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 samsung_s6e3fa2_panel_funcs = {
+ .prepare = samsung_s6e3fa2_prepare,
+ .unprepare = samsung_s6e3fa2_unprepare,
+ .get_modes = samsung_s6e3fa2_get_modes,
+};
+
+static int samsung_s6e3fa2_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct samsung_s6e3fa2 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->supplies[0].supply = "iovdd";
+ ctx->supplies[1].supply = "vddr";
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
+ ctx->supplies);
+ if (ret < 0)
+ return dev_err_probe(dev, ret, "Failed to get regulators\n");
+
+ 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;
+
+ drm_panel_init(&ctx->panel, dev, &samsung_s6e3fa2_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+
+ 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 int samsung_s6e3fa2_remove(struct mipi_dsi_device *dsi)
+{
+ struct samsung_s6e3fa2 *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);
+
+ return 0;
+}
+
+static const struct of_device_id samsung_s6e3fa2_of_match[] = {
+ { .compatible = "samsung,s6e3fa2" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, samsung_s6e3fa2_of_match);
+
+static struct mipi_dsi_driver samsung_s6e3fa2_driver = {
+ .probe = samsung_s6e3fa2_probe,
+ .remove = samsung_s6e3fa2_remove,
+ .driver = {
+ .name = "panel-samsung-s6e3fa2",
+ .of_match_table = samsung_s6e3fa2_of_match,
+ },
+};
+module_mipi_dsi_driver(samsung_s6e3fa2_driver);
+
+MODULE_AUTHOR("Iskren Chernev <iskren.chernev@xxxxxxxxx>");
+MODULE_DESCRIPTION("DRM driver for samsung,s6e3fa2 panel");
+MODULE_LICENSE("GPL v2");
--
2.30.0