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Date: Fri, 7 Oct 2022 13:14:43 +0200
From: Nia Espera <a5b6@...eup.net>
To: Thierry Reding <thierry.reding@...il.com>,
Sam Ravnborg <sam@...nborg.org>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org
Cc: ~postmarketos/upstreaming@...ts.sr.ht,
linux-arm-msm@...r.kernel.org, phone-devel@...r.kernel.org,
Nia Espera <a5b6@...eup.net>,
Caleb Connolly <caleb@...nolly.tech>
Subject: [PATCH v2 1/2] drivers: gpu: drm: add driver for samsung s6e3fc2x01 cmd mode panel
Adds a dedicated driver for the Samsung s6e3fc2x01 panel used in OnePlus
6T smartphones which was previously driven by the sofef00 panel driver
Signed-off-by: Nia Espera <a5b6@...eup.net>
Reviewed-by: Caleb Connolly <caleb@...nolly.tech>
---
MAINTAINERS | 5 +
drivers/gpu/drm/panel/Kconfig | 11 +
drivers/gpu/drm/panel/Makefile | 1 +
.../gpu/drm/panel/panel-samsung-s6e3fc2x01.c | 396 ++++++++++++++++++
4 files changed, 413 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6e3fc2x01.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 936490dcc97b..7e9455ac5a13 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6630,6 +6630,11 @@ S: Maintained
F: Documentation/devicetree/bindings/display/panel/samsung,s6d27a1.yaml
F: drivers/gpu/drm/panel/panel-samsung-s6d27a1.c
+DRM DRIVER FOR SAMSUNG S6E3FC2X01 PANELS
+M: Nia Espera <a5b6@...eup.net>
+S: Maintained
+F: drivers/gpu/drm/panel/panel-samsung-s6e3fc2x01.c
+
DRM DRIVER FOR SITRONIX ST7703 PANELS
M: Guido Günther <agx@...xcpu.org>
R: Purism Kernel Team <kernel@...i.sm>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 9a281120363c..ee62d5d8828a 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -558,6 +558,17 @@ config DRM_PANEL_SAMSUNG_SOFEF00
The panels are 2280x1080@...z and 2340x1080@...z respectively
+config DRM_PANEL_SAMSUNG_S6E3FC2X01
+ tristate "Samsung s6e3fc2x01 OnePlus 6T DSI cmd mode panel"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ select VIDEOMODE_HELPERS
+ Say Y or M here if you want to enable support for the Samsung AMOLED
+ command mode panel found in the OnePlus 6T smartphone.
+
+ The panel is 2340x1080@...z
+
config DRM_PANEL_SEIKO_43WVF1G
tristate "Seiko 43WVF1G panel"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 6d493b9d64fe..b54de8812e91 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -56,6 +56,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_DSI) += panel-samsung-s6e63m0-dsi.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01) += panel-samsung-s6e88a0-ams452ef01.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_SOFEF00) += panel-samsung-sofef00.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3FC2X01) += panel-samsung-s6e3fc2x01.o
obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o
obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
obj-$(CONFIG_DRM_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.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 000000000000..54b05703ebe4
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e3fc2x01.c
@@ -0,0 +1,396 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2022 Nia Espera <a5b6@...eup.net>
+ * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+ * Copyright (c) 2022, 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/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>
+
+struct samsung_s6e3fc2x01 {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct regulator *supply;
+ struct gpio_desc *reset_gpio;
+ const struct drm_display_mode *mode;
+ bool prepared;
+};
+
+static inline
+struct samsung_s6e3fc2x01 *to_samsung_s6e3fc2x01(struct drm_panel *panel)
+{
+ return container_of(panel, struct samsung_s6e3fc2x01, panel);
+}
+
+#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_s6e3fc2x01_reset(struct samsung_s6e3fc2x01 *ctx)
+{
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ usleep_range(2000, 3000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ usleep_range(10000, 11000);
+}
+
+static int samsung_s6e3fc2x01_on(struct samsung_s6e3fc2x01 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ dsi_dcs_write_seq(dsi, 0x9f, 0xa5, 0xa5);
+
+ ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+ if (ret < 0) {
+ dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
+ return ret;
+ }
+ usleep_range(10000, 11000);
+
+ dsi_dcs_write_seq(dsi, 0x9f, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xb0, 0x01);
+ dsi_dcs_write_seq(dsi, 0xcd, 0x01);
+ dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+ usleep_range(15000, 16000);
+ dsi_dcs_write_seq(dsi, 0x9f, 0xa5, 0xa5);
+
+ 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;
+ }
+
+ dsi_dcs_write_seq(dsi, 0x9f, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xeb, 0x17, 0x41, 0x92, 0x0e, 0x10, 0x82, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+
+ ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 0x0437);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set column address: %d\n", ret);
+ return ret;
+ }
+
+ ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 0x0923);
+ if (ret < 0) {
+ dev_err(dev, "Failed to set page address: %d\n", ret);
+ return ret;
+ }
+
+ dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xb0, 0x09);
+ dsi_dcs_write_seq(dsi, 0xe8, 0x10, 0x30);
+ dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+ dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xb0, 0x07);
+ dsi_dcs_write_seq(dsi, 0xb7, 0x01);
+ dsi_dcs_write_seq(dsi, 0xb0, 0x08);
+ dsi_dcs_write_seq(dsi, 0xb7, 0x12);
+ dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+ dsi_dcs_write_seq(dsi, 0xfc, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xb0, 0x01);
+ dsi_dcs_write_seq(dsi, 0xe3, 0x88);
+ dsi_dcs_write_seq(dsi, 0xb0, 0x07);
+ dsi_dcs_write_seq(dsi, 0xed, 0x67);
+ dsi_dcs_write_seq(dsi, 0xfc, 0xa5, 0xa5);
+ dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
+ dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+ dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
+ usleep_range(1000, 2000);
+ dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xb3, 0x00, 0xc1);
+ dsi_dcs_write_seq(dsi, 0xf0, 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;
+ }
+
+ usleep_range(10000, 11000);
+ dsi_dcs_write_seq(dsi, 0x9f, 0xa5, 0xa5);
+ dsi_dcs_write_seq(dsi, 0x29);
+ dsi_dcs_write_seq(dsi, 0x9f, 0x5a, 0x5a);
+
+ return 0;
+}
+
+static int samsung_s6e3fc2x01_off(struct samsung_s6e3fc2x01 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ dsi_dcs_write_seq(dsi, 0x9f, 0xa5, 0xa5);
+
+ 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);
+
+ dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ usleep_range(16000, 17000);
+ dsi_dcs_write_seq(dsi, 0xb0, 0x50);
+ dsi_dcs_write_seq(dsi, 0xb9, 0x82);
+ dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+ usleep_range(16000, 17000);
+ msleep(40);
+
+ ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
+ return ret;
+ }
+
+ dsi_dcs_write_seq(dsi, 0x9f, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+ dsi_dcs_write_seq(dsi, 0xb0, 0x05);
+ dsi_dcs_write_seq(dsi, 0xf4, 0x01);
+ dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+ msleep(160);
+
+ return 0;
+}
+
+static int samsung_s6e3fc2x01_prepare(struct drm_panel *panel)
+{
+ struct samsung_s6e3fc2x01 *ctx = to_samsung_s6e3fc2x01(panel);
+ struct device *dev = &ctx->dsi->dev;
+ int ret;
+
+ if (ctx->prepared)
+ return 0;
+
+ ret = regulator_enable(ctx->supply);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+
+ samsung_s6e3fc2x01_reset(ctx);
+
+ ret = samsung_s6e3fc2x01_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;
+ }
+
+ ctx->prepared = true;
+ return 0;
+}
+
+static int samsung_s6e3fc2x01_unprepare(struct drm_panel *panel)
+{
+ struct samsung_s6e3fc2x01 *ctx = to_samsung_s6e3fc2x01(panel);
+ struct device *dev = &ctx->dsi->dev;
+ int ret;
+
+ if (!ctx->prepared)
+ return 0;
+
+ ret = samsung_s6e3fc2x01_off(ctx);
+ if (ret < 0)
+ dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
+ ctx->prepared = false;
+ return 0;
+}
+
+static const struct drm_display_mode samsung_s6e3fc2x01_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 samsung_s6e3fc2x01_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct drm_display_mode *mode;
+ struct samsung_s6e3fc2x01 *ctx = to_samsung_s6e3fc2x01(panel);
+
+ mode = drm_mode_duplicate(connector->dev, ctx->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_s6e3fc2x01_panel_funcs = {
+ .prepare = samsung_s6e3fc2x01_prepare,
+ .unprepare = samsung_s6e3fc2x01_unprepare,
+ .get_modes = samsung_s6e3fc2x01_get_modes,
+};
+
+static int s6e3fc2x01_panel_bl_update_status(struct backlight_device *bl)
+{
+ struct mipi_dsi_device *dsi = bl_get_data(bl);
+ int err;
+ u16 brightness;
+
+ brightness = (u16)backlight_get_brightness(bl);
+ // This panel needs the high and low bytes swapped for the brightness value
+ brightness = __swab16(brightness);
+
+ err = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
+ if (err < 0)
+ return err;
+
+ 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 = 1023,
+ .max_brightness = 1023,
+ };
+
+ return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+ &s6e3fc2x01_panel_bl_ops, &props);
+}
+
+static int samsung_s6e3fc2x01_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct samsung_s6e3fc2x01 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->mode = of_device_get_match_data(dev);
+
+ if (!ctx->mode) {
+ dev_err(dev, "Missing device mode\n");
+ return -ENODEV;
+ }
+
+ ctx->supply = devm_regulator_get(dev, "vddio");
+ if (IS_ERR(ctx->supply))
+ return dev_err_probe(dev, PTR_ERR(ctx->supply),
+ "Failed to get vddio regulator\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_MODE_NO_EOT_PACKET |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+ drm_panel_init(&ctx->panel, dev, &samsung_s6e3fc2x01_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+
+ 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 int samsung_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);
+
+ return 0;
+}
+
+static const struct of_device_id samsung_s6e3fc2x01_of_match[] = {
+ {
+ .compatible = "samsung,s6e3fc2x01",
+ .data = &samsung_s6e3fc2x01_mode,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, samsung_s6e3fc2x01_of_match);
+
+static struct mipi_dsi_driver samsung_s6e3fc2x01_driver = {
+ .probe = samsung_s6e3fc2x01_probe,
+ .remove = samsung_s6e3fc2x01_remove,
+ .driver = {
+ .name = "panel-samsung-s6e3fc2x01",
+ .of_match_table = samsung_s6e3fc2x01_of_match,
+ },
+};
+module_mipi_dsi_driver(samsung_s6e3fc2x01_driver);
+
+MODULE_AUTHOR("Nia Espera <a5b6@...eup.net>");
+MODULE_DESCRIPTION("DRM driver for OnePlus 6T Panel");
+MODULE_LICENSE("GPL v2");
--
2.38.0
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