From 1190fc8d7b8a9cebea8dcbd2e544e43990ae81d0 Mon Sep 17 00:00:00 2001
From: KancyJoe <kancy2333@outlook.com>
Date: Thu, 25 Jun 2026 11:29:08 +0200
Subject: [PATCH] drm: panel: add support for the Renesas R63419 based dual-DSI
 video mode Display Panels

Implement support for the Renesas 63419 based dual-DSI video mode
Display Panels found in the Ayaneo gaming handled devices.

Signed-off-by: KancyJoe <kancy2333@outlook.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260625-topic-sm8650-ayaneo-pocket-s2-r63419-v8-2-8570e692143e@linaro.org
---
 drivers/gpu/drm/panel/Kconfig                |  12 +
 drivers/gpu/drm/panel/Makefile               |   1 +
 drivers/gpu/drm/panel/panel-renesas-r63419.c | 350 +++++++++++++++++++
 3 files changed, 363 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-renesas-r63419.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index bc8bbc9634cf..76fb324a2a13 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -838,6 +838,18 @@ config DRM_PANEL_RENESAS_R61307
 	  This panel controller can be found in LG Optimus Vu P895 smartphone
 	  in combination with LCD panel.
 
+config DRM_PANEL_RENESAS_R63419
+	tristate "Renesas R63419 dual-DSI video mode panels"
+	depends on OF && GPIOLIB
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for Ayaneo WT0600 and WT0630
+	  1440x2560 60Hz dual-DSI video mode display panels with Renesas
+	  R63419 IC.
+
+	  These panels are used in Ayaneo handheld gaming devices.
+
 config DRM_PANEL_RENESAS_R69328
 	tristate "Renesas R69328 720x1280 DSI video mode panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index f3869fd80785..0f29f22f589e 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -82,6 +82,7 @@ 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_RENESAS_R61307) += panel-renesas-r61307.o
+obj-$(CONFIG_DRM_PANEL_RENESAS_R63419) += panel-renesas-r63419.o
 obj-$(CONFIG_DRM_PANEL_RENESAS_R69328) += panel-renesas-r69328.o
 obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMS581VF01) += panel-samsung-ams581vf01.o
diff --git a/drivers/gpu/drm/panel/panel-renesas-r63419.c b/drivers/gpu/drm/panel/panel-renesas-r63419.c
new file mode 100644
index 000000000000..59ac323f5276
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-renesas-r63419.c
@@ -0,0 +1,350 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * DRM driver for Renesas R63419 based dual-DSI video mode panels
+ *
+ * Copyright (c) 2025, Kancy Joe <kancy2333@outlook.com>
+ * Copyright (C) 2026 Linaro Limited
+ * Author: Neil Armstrong <neil.armstrong@linaro.org>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/regulator/consumer.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/drm_connector.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+struct renesas_r63419_panel {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi[2];
+	const struct panel_desc *desc;
+
+	struct gpio_desc *reset_gpio;
+	struct regulator_bulk_data *vdd_supplies;
+	struct regulator_bulk_data *vcc_supplies;
+	enum drm_panel_orientation orientation;
+};
+
+/* VDDIO/VDD Supplies */
+static const struct regulator_bulk_data renesas_r63419_vdd_supplies[] = {
+	{ .supply = "vddio" },
+	{ .supply = "vdd" },
+};
+
+/* VSP/VSN/VCI Supplies */
+static const struct regulator_bulk_data renesas_r63419_vcc_supplies[] = {
+	{ .supply = "vsp" },
+	{ .supply = "vsn" },
+	{ .supply = "vci" },
+};
+
+struct panel_desc {
+	const struct drm_display_mode *mode;
+	unsigned int lanes;
+	unsigned long mode_flags;
+	enum mipi_dsi_pixel_format format;
+	const struct mipi_dsi_device_info dsi_info;
+};
+
+static const struct drm_display_mode wt0600_mode = {
+	/* Dual dsi */
+	.clock = 2 * (720 + 100 + 8 + 40) * (2560 + 15 + 2 + 8) * 60 / 1000,
+	.hdisplay = 2 * 720,
+	.hsync_start = 2 * (720 + 100),
+	.hsync_end = 2 * (720 + 100 + 8),
+	.htotal = 2 * (720 + 100 + 8 + 40),
+	.vdisplay = 2560,
+	.vsync_start = 2560 + 15,
+	.vsync_end = 2560 + 15 + 2,
+	.vtotal = 2560 + 15 + 2 + 8,
+	.type = DRM_MODE_TYPE_DRIVER,
+	.width_mm = 74,
+	.height_mm = 131,
+};
+
+static const struct drm_display_mode wt0630_mode = {
+	/* Dual dsi */
+	.clock = 2 * (720 + 100 + 8 + 40) * (2560 + 15 + 2 + 8) * 60 / 1000,
+	.hdisplay = 2 * 720,
+	.hsync_start = 2 * (720 + 100),
+	.hsync_end = 2 * (720 + 100 + 8),
+	.htotal = 2 * (720 + 100 + 8 + 40),
+	.vdisplay = 2560,
+	.vsync_start = 2560 + 15,
+	.vsync_end = 2560 + 15 + 2,
+	.vtotal = 2560 + 15 + 2 + 8,
+	.type = DRM_MODE_TYPE_DRIVER,
+	.width_mm = 78,
+	.height_mm = 140,
+};
+
+static struct panel_desc wt0600_desc = {
+	.lanes = 4,
+	.mode = &wt0600_mode,
+	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+		      MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM,
+	.format = MIPI_DSI_FMT_RGB888,
+};
+
+static struct panel_desc wt0630_desc = {
+	.lanes = 4,
+	.mode = &wt0630_mode,  /* wt0600 only has different screen size */
+	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
+		      MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM,
+	.format = MIPI_DSI_FMT_RGB888,
+};
+
+static inline struct renesas_r63419_panel *
+to_renesas_r63419_panel(struct drm_panel *panel)
+{
+	return container_of(panel, struct renesas_r63419_panel, panel);
+}
+
+static int renesas_r63419_on(struct renesas_r63419_panel *ctx)
+{
+	struct mipi_dsi_multi_context dsi_ctx = { 0 };
+
+	/*
+	 * Panel registers are loaded from DDIC Non Volatile Memory
+	 *
+	 * The DDIC expects this sequence to get out of sleep and enable display
+	 */
+
+	mipi_dsi_dual(mipi_dsi_dcs_set_display_on_multi,
+		      &dsi_ctx, ctx->dsi[0], ctx->dsi[1]);
+	mipi_dsi_msleep(&dsi_ctx, 50);
+
+	mipi_dsi_dual(mipi_dsi_dcs_exit_sleep_mode_multi,
+		      &dsi_ctx, ctx->dsi[0], ctx->dsi[1]);
+	mipi_dsi_msleep(&dsi_ctx, 150);
+
+	return dsi_ctx.accum_err;
+}
+
+static int renesas_r63419_disable(struct drm_panel *panel)
+{
+	struct renesas_r63419_panel *ctx = to_renesas_r63419_panel(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { 0 };
+
+	mipi_dsi_dual(mipi_dsi_dcs_set_display_off_multi,
+		      &dsi_ctx, ctx->dsi[0], ctx->dsi[1]);
+	mipi_dsi_msleep(&dsi_ctx, 50);
+
+	mipi_dsi_dual(mipi_dsi_dcs_enter_sleep_mode_multi,
+		      &dsi_ctx, ctx->dsi[0], ctx->dsi[1]);
+	mipi_dsi_msleep(&dsi_ctx, 120);
+
+	return 0;
+}
+
+static int renesas_r63419_prepare(struct drm_panel *panel)
+{
+	struct renesas_r63419_panel *ctx = to_renesas_r63419_panel(panel);
+	int ret;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(renesas_r63419_vdd_supplies),
+				    ctx->vdd_supplies);
+	if (ret < 0)
+		return ret;
+
+	usleep_range(1000, 2000);
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(renesas_r63419_vcc_supplies),
+				    ctx->vcc_supplies);
+	if (ret < 0) {
+		regulator_bulk_disable(ARRAY_SIZE(renesas_r63419_vdd_supplies),
+				       ctx->vdd_supplies);
+		return ret;
+	}
+
+	usleep_range(1000, 2000);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+
+	usleep_range(3000, 4000);
+
+	ret = renesas_r63419_on(ctx);
+	if (ret < 0) {
+		dev_err(panel->dev, "Failed to initialize panel: %d\n", ret);
+
+		/* Power off sequence from the r63419 datasheet */
+		regulator_bulk_disable(ARRAY_SIZE(renesas_r63419_vdd_supplies),
+				       ctx->vdd_supplies);
+
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
+		regulator_bulk_disable(ARRAY_SIZE(renesas_r63419_vcc_supplies),
+				       ctx->vcc_supplies);
+
+		return ret;
+	}
+
+	return 0;
+}
+
+static int renesas_r63419_unprepare(struct drm_panel *panel)
+{
+	struct renesas_r63419_panel *ctx = to_renesas_r63419_panel(panel);
+
+	/* Power off sequence from the r63419 datasheet */
+	regulator_bulk_disable(ARRAY_SIZE(renesas_r63419_vdd_supplies), ctx->vdd_supplies);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
+	regulator_bulk_disable(ARRAY_SIZE(renesas_r63419_vcc_supplies), ctx->vcc_supplies);
+
+	return 0;
+}
+
+static int renesas_r63419_get_modes(struct drm_panel *panel,
+				    struct drm_connector *connector)
+{
+	struct renesas_r63419_panel *ctx = to_renesas_r63419_panel(panel);
+	const struct drm_display_mode *mode = ctx->desc->mode;
+
+	return drm_connector_helper_get_modes_fixed(connector, mode);
+}
+
+static enum drm_panel_orientation
+renesas_r63419_get_orientation(struct drm_panel *panel)
+{
+	struct renesas_r63419_panel *ctx = to_renesas_r63419_panel(panel);
+
+	return ctx->orientation;
+}
+
+static const struct drm_panel_funcs renesas_r63419_panel_funcs = {
+	.disable = renesas_r63419_disable,
+	.prepare = renesas_r63419_prepare,
+	.unprepare = renesas_r63419_unprepare,
+	.get_modes = renesas_r63419_get_modes,
+	.get_orientation = renesas_r63419_get_orientation,
+};
+
+static int renesas_r63419_probe(struct mipi_dsi_device *dsi)
+{
+	struct mipi_dsi_device_info info = { 0 };
+	struct device *dev = &dsi->dev;
+	struct renesas_r63419_panel *ctx;
+	struct device_node *dsi1_node;
+	struct mipi_dsi_host *dsi1_host;
+	int ret, i;
+
+	ctx = devm_drm_panel_alloc(dev, struct renesas_r63419_panel, panel,
+				   &renesas_r63419_panel_funcs, DRM_MODE_CONNECTOR_DSI);
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
+
+	ctx->desc = of_device_get_match_data(dev);
+	if (!ctx->desc)
+		return dev_err_probe(dev, -ENODEV,
+				     "Failed to get panel description\n");
+
+	ret = devm_regulator_bulk_get_const(&dsi->dev,
+					    ARRAY_SIZE(renesas_r63419_vdd_supplies),
+					    renesas_r63419_vdd_supplies, &ctx->vdd_supplies);
+	if (ret < 0)
+		return ret;
+
+	ret = devm_regulator_bulk_get_const(&dsi->dev,
+					    ARRAY_SIZE(renesas_r63419_vcc_supplies),
+					    renesas_r63419_vcc_supplies, &ctx->vcc_supplies);
+	if (ret < 0)
+		return ret;
+
+	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 gpio\n");
+
+	/* Get second DSI host */
+	dsi1_node = of_graph_get_remote_node(dsi->dev.of_node, 1, -1);
+	if (!dsi1_node)
+		return dev_err_probe(dev, -ENODEV,
+				     "Failed to get remote node for second DSI\n");
+
+	dsi1_host = of_find_mipi_dsi_host_by_node(dsi1_node);
+	of_node_put(dsi1_node);
+	if (!dsi1_host)
+		return dev_err_probe(dev, -EPROBE_DEFER,
+				     "Failed to find second DSI host\n");
+
+	/* Copy current DSI info, do not provide OF node since no driver needs to be attached */
+	strscpy(info.type, dsi->name);
+	info.channel = dsi->channel;
+
+	/* Register the second DSI device */
+	ctx->dsi[1] = devm_mipi_dsi_device_register_full(dev, dsi1_host, &info);
+	if (IS_ERR(ctx->dsi[1]))
+		return dev_err_probe(dev, PTR_ERR(ctx->dsi[1]),
+				     "Failed to register second DSI device\n");
+
+	ctx->dsi[0] = dsi;
+	mipi_dsi_set_drvdata(dsi, ctx);
+
+	/* Get panel orientation */
+	ret = of_drm_get_panel_orientation(dev->of_node, &ctx->orientation);
+	if (ret < 0 && ret != -ENODEV)
+		return dev_err_probe(dev, ret,
+				     "Failed to get panel orientation\n");
+
+	ctx->panel.prepare_prev_first = true;
+
+	ret = drm_panel_of_backlight(&ctx->panel);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get backlight\n");
+
+	ret = devm_drm_panel_add(dev, &ctx->panel);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to add panel\n");
+
+	/* Configure and attach both DSI devices */
+	for (i = 0; i < ARRAY_SIZE(ctx->dsi); i++) {
+		ctx->dsi[i]->lanes = ctx->desc->lanes;
+		ctx->dsi[i]->format = ctx->desc->format;
+		ctx->dsi[i]->mode_flags = ctx->desc->mode_flags;
+
+		ret = devm_mipi_dsi_attach(dev, ctx->dsi[i]);
+		if (ret < 0)
+			return dev_err_probe(dev, ret,
+					     "Failed to attach DSI device %d\n", i);
+	}
+
+	return 0;
+}
+
+static const struct of_device_id renesas_r63419_of_match[] = {
+	{
+		.compatible = "ayaneo,wt0600-2k",
+		.data = &wt0600_desc,
+	},
+	{
+		.compatible = "ayaneo,wt0630-2k",
+		.data = &wt0630_desc,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, renesas_r63419_of_match);
+
+static struct mipi_dsi_driver renesas_r63419_driver = {
+	.probe = renesas_r63419_probe,
+	.driver = {
+		.name = "panel-renesas-r63419",
+		.of_match_table = renesas_r63419_of_match,
+	},
+};
+module_mipi_dsi_driver(renesas_r63419_driver);
+
+MODULE_AUTHOR("Kancy Joe <kancy2333@outlook.com>");
+MODULE_AUTHOR("Neil Armstrong <neil.armstrong@linaro.org>");
+MODULE_DESCRIPTION("DRM driver for Renesas R63419 based dual-DSI video mode panels");
+MODULE_LICENSE("GPL");