drm/panel: Add Samsung AMS581VF01 panel driver

Add the driver for Samsung AMS581VF01 SOFEF01-based 5.81" FHD Plus CMD
mode OLED panel support found in Google Pixel 4a (sm7150-google-sunfish)

Signed-off-by: Danila Tikhonov <danila@jiaxyga.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20241013212402.15624-3-danila@jiaxyga.com


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241013212402.15624-3-danila@jiaxyga.com

drivers/gpu/drm/panel/Kconfig

@@ -614,6 +614,15 @@ config DRM_PANEL_RONBO_RB070D30
 	  Say Y here if you want to enable support for Ronbo Electronics
 	  RB070D30 1024x600 DSI panel.
 
+config DRM_PANEL_SAMSUNG_AMS581VF01
+	tristate "Samsung AMS581VF01 panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y or M here if you want to enable support for the
+	  Samsung AMS581VF01 FHD Plus (2340x1080@60Hz) CMD mode panel.
+
 config DRM_PANEL_SAMSUNG_AMS639RQ08
 	tristate "Samsung AMS639RQ08 panel"
 	depends on OF

drivers/gpu/drm/panel/Makefile

@@ -62,6 +62,7 @@ obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM68200) += panel-raydium-rm68200.o
 obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM692E5) += panel-raydium-rm692e5.o
 obj-$(CONFIG_DRM_PANEL_RAYDIUM_RM69380) += panel-raydium-rm69380.o
 obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMS581VF01) += panel-samsung-ams581vf01.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMS639RQ08) += panel-samsung-ams639rq08.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20) += panel-samsung-atna33xc20.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o

drivers/gpu/drm/panel/panel-samsung-ams581vf01.c

+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2024, Danila Tikhonov <danila@jiaxyga.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.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>
+
+/* Manufacturer Command Set */
+#define MCS_ACCESS_PROT_OFF	0xb0
+#define MCS_PASSWD		0xf0
+
+struct ams581vf01 {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+	struct gpio_desc *reset_gpio;
+	struct regulator_bulk_data *supplies;
+};
+
+static const struct regulator_bulk_data ams581vf01_supplies[] = {
+	{ .supply = "vdd3p3" },
+	{ .supply = "vddio" },
+	{ .supply = "vsn" },
+	{ .supply = "vsp" },
+};
+
+static inline struct ams581vf01 *to_ams581vf01(struct drm_panel *panel)
+{
+	return container_of(panel, struct ams581vf01, panel);
+}
+
+static void ams581vf01_reset(struct ams581vf01 *ctx)
+{
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(10000, 11000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	usleep_range(10000, 11000);
+}
+
+static int ams581vf01_on(struct ams581vf01 *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+
+	/* Sleep Out, Wait 10ms */
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+	usleep_range(10000, 11000);
+
+	/* TE On */
+	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+
+	/* MIC Setting */
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0x5a, 0x5a); /* Unlock */
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xeb, 0x17,
+					       0x41, 0x92,
+					       0x0e, 0x10,
+					       0x82, 0x5a);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0xa5, 0xa5); /* Lock */
+
+	/* 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);
+
+	/* Brightness Setting */
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
+
+	/* Horizontal & Vertical sync Setting */
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0x5a, 0x5a); /* Unlock */
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x09);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe8, 0x11, 0x30);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0xa5, 0xa5); /* Lock */
+	mipi_dsi_msleep(&dsi_ctx, 110);
+
+	/* Display On */
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+
+	return dsi_ctx.accum_err;
+}
+
+static void ams581vf01_off(struct ams581vf01 *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+
+	/* Display Off & Sleep In */
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 20);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+
+	/* VCI operating mode change */
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0x5a, 0x5a); /* Unlock */
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x05);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xf4, 0x01);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD, 0xa5, 0xa5);  /* Lock */
+
+	mipi_dsi_msleep(&dsi_ctx, 120);
+}
+
+static int ams581vf01_prepare(struct drm_panel *panel)
+{
+	struct ams581vf01 *ctx = to_ams581vf01(panel);
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(ams581vf01_supplies),
+				    ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	ams581vf01_reset(ctx);
+
+	ret = ams581vf01_on(ctx);
+	if (ret < 0) {
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+		regulator_bulk_disable(ARRAY_SIZE(ams581vf01_supplies),
+				       ctx->supplies);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int ams581vf01_unprepare(struct drm_panel *panel)
+{
+	struct ams581vf01 *ctx = to_ams581vf01(panel);
+
+	ams581vf01_off(ctx);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(ams581vf01_supplies),
+			       ctx->supplies);
+
+	return 0;
+}
+
+static const struct drm_display_mode ams581vf01_mode = {
+	.clock = (1080 + 32 + 73 + 98) * (2340 + 8 + 1 + 8) * 60 / 1000,
+	.hdisplay = 1080,
+	.hsync_start = 1080 + 32,
+	.hsync_end = 1080 + 32 + 73,
+	.htotal = 1080 + 32 + 73 + 98,
+	.vdisplay = 2340,
+	.vsync_start = 2340 + 8,
+	.vsync_end = 2340 + 8 + 1,
+	.vtotal = 2340 + 8 + 1 + 8,
+	.width_mm = 62,
+	.height_mm = 134,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int ams581vf01_get_modes(struct drm_panel *panel,
+				 struct drm_connector *connector)
+{
+	return drm_connector_helper_get_modes_fixed(connector, &ams581vf01_mode);
+}
+
+static const struct drm_panel_funcs ams581vf01_panel_funcs = {
+	.prepare = ams581vf01_prepare,
+	.unprepare = ams581vf01_unprepare,
+	.get_modes = ams581vf01_get_modes,
+};
+
+static int ams581vf01_bl_update_status(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	u16 brightness = backlight_get_brightness(bl);
+	int ret;
+
+	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
+	if (ret < 0)
+		return ret;
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	return 0;
+}
+
+static const struct backlight_ops ams581vf01_bl_ops = {
+	.update_status = ams581vf01_bl_update_status,
+};
+
+static struct backlight_device *
+ams581vf01_create_backlight(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	const struct backlight_properties props = {
+		.type = BACKLIGHT_RAW,
+		.brightness = 511,
+		.max_brightness = 1023,
+	};
+
+	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+						&ams581vf01_bl_ops, &props);
+}
+
+static int ams581vf01_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct ams581vf01 *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ret = devm_regulator_bulk_get_const(&dsi->dev,
+					    ARRAY_SIZE(ams581vf01_supplies),
+					    ams581vf01_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 | MIPI_DSI_MODE_LPM;
+
+	drm_panel_init(&ctx->panel, dev, &ams581vf01_panel_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+	ctx->panel.prepare_prev_first = true;
+
+	ctx->panel.backlight = ams581vf01_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 = devm_mipi_dsi_attach(dev, dsi);
+	if (ret < 0) {
+		drm_panel_remove(&ctx->panel);
+		return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
+	}
+
+	return 0;
+}
+
+static void ams581vf01_remove(struct mipi_dsi_device *dsi)
+{
+	struct ams581vf01 *ctx = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_remove(&ctx->panel);
+}
+
+static const struct of_device_id ams581vf01_of_match[] = {
+	{ .compatible = "samsung,ams581vf01" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ams581vf01_of_match);
+
+static struct mipi_dsi_driver ams581vf01_driver = {
+	.probe = ams581vf01_probe,
+	.remove = ams581vf01_remove,
+	.driver = {
+		.name = "panel-samsung-ams581vf01",
+		.of_match_table = ams581vf01_of_match,
+	},
+};
+module_mipi_dsi_driver(ams581vf01_driver);
+
+MODULE_AUTHOR("Danila Tikhonov <danila@jiaxyga.com>");
+MODULE_DESCRIPTION("DRM driver for SAMSUNG AMS581VF01 cmd mode dsi panel");
+MODULE_LICENSE("GPL");