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To: linux-arm-msm@vger.kernel.org, Thierry Reding <thierry.reding@gmail.com>,
 Sam Ravnborg <sam@ravnborg.org>, David Airlie <airlied@linux.ie>,
 Daniel Vetter <daniel@ffwll.ch>
From: Caleb Connolly <caleb@connolly.tech>
Subject: [PATCH 1/5] drm/panel/samsung-sofef00: Add panel for OnePlus 6/T
 devices
Message-ID: <20201112161920.2671430-2-caleb@connolly.tech>
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Reply-To: Caleb Connolly <caleb@connolly.tech>
Cc: Caleb Connolly <caleb@connolly.tech>, phone-devel@vger.kernel.org,
 ~postmarketos/upstreaming@lists.sr.ht, dri-devel@lists.freedesktop.org,
 linux-kernel@vger.kernel.org
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The OnePlus 6/T devices use different panels however they are
functionally identical with the only differences being the resolution.
The panels also don't seem to be used by any other devices, just combine
them into one driver.

The panels are: samsung,sofef00
and             samsung,s6e3fc2x01

Signed-off-by: Caleb Connolly <caleb@connolly.tech>
---

Changes since v1:
 * Rename driver to samsung-sofef00 rather than be device
 specific.
 * Make use of drm_panel backlight, simplifying the driver.
 * Make reset function do a full reset, instead of simply taking the
 panel out of reset.
 * Removed get_brightness function as it doesn't return correct data.
---
 drivers/gpu/drm/panel/Kconfig                 |  12 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 drivers/gpu/drm/panel/panel-samsung-sofef00.c | 353 ++++++++++++++++++
 3 files changed, 366 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-samsung-sofef00.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index b9dbedf8f15e..c4486b6b4e5a 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -361,6 +361,18 @@ config DRM_PANEL_SAMSUNG_S6E8AA0
 	select DRM_MIPI_DSI
 	select VIDEOMODE_HELPERS
 
+config DRM_PANEL_SAMSUNG_SOFEF00
+	tristate "Samsung sofef00/s6e3fc2x01 OnePlus 6/6T DSI cmd mode panels"
+	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 AMOLED
+	  command mode panels found in the OnePlus 6/6T smartphones.
+
+	  The panels are 2280x1080@60Hz and 2340x1080@60Hz respectively
+
 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 2ba560bca61d..ebb67f3de10e 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_SPI) += panel-samsung-s6e63m0-spi.o
 obj-$(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_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-sofef00.c b/drivers/gpu/drm/panel/panel-samsung-sofef00.c
new file mode 100644
index 000000000000..84b4f4cb2e6f
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-sofef00.c
@@ -0,0 +1,353 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2020 Caleb Connolly <caleb@connolly.tech>
+ * Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+ * Copyright (c) 2020, 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 sofef00_panel {
+	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 sofef00_panel *to_sofef00_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct sofef00_panel, 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 sofef00_panel_reset(struct sofef00_panel *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(12000, 13000);
+}
+
+static int sofef00_panel_on(struct sofef00_panel *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_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, 0xf0, 0x5a, 0x5a);
+
+	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, 0xf0, 0xa5, 0xa5);
+	dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a);
+	dsi_dcs_write_seq(dsi, 0xb0, 0x07);
+	dsi_dcs_write_seq(dsi, 0xb6, 0x12);
+	dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5);
+	dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
+	dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
+
+	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 sofef00_panel_off(struct sofef00_panel *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;
+	}
+	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;
+	}
+	msleep(160);
+
+	return 0;
+}
+
+static int sofef00_panel_prepare(struct drm_panel *panel)
+{
+	struct sofef00_panel *ctx = to_sofef00_panel(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;
+	}
+
+	sofef00_panel_reset(ctx);
+
+	ret = sofef00_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;
+	}
+
+	ctx->prepared = true;
+	return 0;
+}
+
+static int sofef00_panel_unprepare(struct drm_panel *panel)
+{
+	struct sofef00_panel *ctx = to_sofef00_panel(panel);
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	if (!ctx->prepared)
+		return 0;
+
+	ret = sofef00_panel_off(ctx);
+	if (ret < 0)
+		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
+
+	regulator_disable(ctx->supply);
+
+	ctx->prepared = false;
+	return 0;
+}
+
+static const struct drm_display_mode enchilada_panel_mode = {
+	.clock = (1080 + 112 + 16 + 36) * (2280 + 36 + 8 + 12) * 60 / 1000,
+	.hdisplay = 1080,
+	.hsync_start = 1080 + 112,
+	.hsync_end = 1080 + 112 + 16,
+	.htotal = 1080 + 112 + 16 + 36,
+	.vdisplay = 2280,
+	.vsync_start = 2280 + 36,
+	.vsync_end = 2280 + 36 + 8,
+	.vtotal = 2280 + 36 + 8 + 12,
+	.width_mm = 68,
+	.height_mm = 145,
+};
+
+static const struct drm_display_mode fajita_panel_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 sofef00_panel_get_modes(struct drm_panel *panel,
+			struct drm_connector *connector)
+{
+	struct drm_display_mode *mode;
+	struct sofef00_panel *ctx = to_sofef00_panel(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 sofef00_panel_panel_funcs = {
+	.prepare = sofef00_panel_prepare,
+	.unprepare = sofef00_panel_unprepare,
+	.get_modes = sofef00_panel_get_modes,
+};
+
+static int sofef00_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 sofef00_panel_bl_ops = {
+	.update_status = sofef00_panel_bl_update_status,
+};
+
+static struct backlight_device *
+sofef00_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,
+						&sofef00_panel_bl_ops, &props);
+}
+
+
+static int sofef00_panel_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct sofef00_panel *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)) {
+		ret = PTR_ERR(ctx->supply);
+		dev_err(dev, "Failed to get vddio regulator: %d\n", ret);
+		return ret;
+	}
+
+	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(ctx->reset_gpio)) {
+		ret = PTR_ERR(ctx->reset_gpio);
+		dev_warn(dev, "Failed to get reset-gpios: %d\n", ret);
+		return ret;
+	}
+
+	ctx->dsi = dsi;
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	dsi->lanes = 4;
+	dsi->format = MIPI_DSI_FMT_RGB888;
+
+	drm_panel_init(&ctx->panel, dev, &sofef00_panel_panel_funcs,
+				DRM_MODE_CONNECTOR_DSI);
+
+	ctx->panel.backlight = sofef00_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);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int sofef00_panel_remove(struct mipi_dsi_device *dsi)
+{
+	struct sofef00_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);
+
+	return 0;
+}
+
+static const struct of_device_id sofef00_panel_of_match[] = {
+	{ // OnePlus 6 / enchilada
+		.compatible = "samsung,sofef00",
+		.data = &enchilada_panel_mode,
+	},
+	{ // OnePlus 6T / fajita
+		.compatible = "samsung,s6e3fc2x01",
+		.data = &fajita_panel_mode,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sofef00_panel_of_match);
+
+static struct mipi_dsi_driver sofef00_panel_driver = {
+	.probe = sofef00_panel_probe,
+	.remove = sofef00_panel_remove,
+	.driver = {
+		.name = "panel-oneplus6",
+		.of_match_table = sofef00_panel_of_match,
+	},
+};
+
+module_mipi_dsi_driver(sofef00_panel_driver);
+
+MODULE_AUTHOR("Caleb Connolly <caleb@connolly.tech>");
+MODULE_DESCRIPTION("DRM driver for Samsung AMOLED DSI panels found in OnePlus 6/6T phones");
+MODULE_LICENSE("GPL v2");

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To: linux-arm-msm@vger.kernel.org, Thierry Reding <thierry.reding@gmail.com>,
 Sam Ravnborg <sam@ravnborg.org>, David Airlie <airlied@linux.ie>,
 Daniel Vetter <daniel@ffwll.ch>, Rob Herring <robh+dt@kernel.org>
From: Caleb Connolly <caleb@connolly.tech>
Subject: [PATCH 2/5] dt-bindings: panel-simple-dsi: add samsung panels for
 OnePlus 6/T
Message-ID: <20201112161920.2671430-3-caleb@connolly.tech>
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Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
 dri-devel@lists.freedesktop.org, Caleb Connolly <caleb@connolly.tech>,
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Add compatibles for the samsung,sofef00 and samsung,s6e3fc2x01 panels
used in the OnePlus 6 & 6T respectively.

Signed-off-by: Caleb Connolly <caleb@connolly.tech>
---
 .../devicetree/bindings/display/panel/panel-simple-dsi.yaml   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
index c0dd9fa29f1d..04d829177aa8 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple-dsi.yaml
@@ -47,6 +47,10 @@ properties:
       - panasonic,vvx10f004b00
         # Panasonic 10" WUXGA TFT LCD panel
       - panasonic,vvx10f034n00
+        # Samsung sofef00 1080x2280 AMOLED panel
+      - samsung,sofef00
+        # Samsung s6e3fc2x01 1080x2340 AMOLED panel
+      - samsung,s6e3fc2x01
 
   reg:
     maxItems: 1