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From: =?utf-8?q?Barnab=C3=A1s_Cz=C3=A9m=C3=A1n?= <barnabas.czeman@mainlining.org>
Date: Sun, 27 Apr 2025 11:11:12 +0200
Subject: [PATCH 2/2] drivers: gpu: drm: panel: Add BOE TD4320
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To: Neil Armstrong <neil.armstrong@linaro.org>, 
 Jessica Zhang <quic_jesszhan@quicinc.com>, 
 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, 
 Maxime Ripard <mripard@kernel.org>, Thomas Zimmermann <tzimmermann@suse.de>, 
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Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, 
 linux-kernel@vger.kernel.org, 
 =?utf-8?q?Barnab=C3=A1s_Cz=C3=A9m=C3=A1n?= <barnabas.czeman@mainlining.org>
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Add driver for BOE TD4320 DSI panel, used in Xiaomi Redmi Note 7
mobile phone.

Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
---
 drivers/gpu/drm/panel/Kconfig            |   9 ++
 drivers/gpu/drm/panel/Makefile           |   1 +
 drivers/gpu/drm/panel/panel-boe-td4320.c | 224 +++++++++++++++++++++++++++++++
 3 files changed, 234 insertions(+)

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 7e9c60a626fbbabb954ed2a7e3d1ef5eee0679d6..639f4324db617a0a2a56debd75eeca7a50e60df6 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -67,6 +67,15 @@ config DRM_PANEL_BOE_HIMAX8279D
 	  24 bit RGB per pixel. It provides a MIPI DSI interface to
 	  the host and has a built-in LED backlight.
 
+config DRM_PANEL_BOE_TD4320
+	tristate "BOE TD4320 DSI panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for BOE TD4320 1080x2340
+	  video mode panel found in Xiaomi Redmi Note 7 smartphones.
+
 config DRM_PANEL_BOE_TH101MB31UIG002_28A
 	tristate "Boe TH101MB31UIG002-28A panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 883974f0cba128e28f23e31512f8d30d59913b0e..5eec88e4ac3dea6a1cb357e27a32d2d14c64af9b 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -5,6 +5,7 @@ obj-$(CONFIG_DRM_PANEL_ASUS_Z00T_TM5P5_NT35596) += panel-asus-z00t-tm5p5-n35596.
 obj-$(CONFIG_DRM_PANEL_AUO_A030JTN01) += panel-auo-a030jtn01.o
 obj-$(CONFIG_DRM_PANEL_BOE_BF060Y8M_AJ0) += panel-boe-bf060y8m-aj0.o
 obj-$(CONFIG_DRM_PANEL_BOE_HIMAX8279D) += panel-boe-himax8279d.o
+obj-$(CONFIG_DRM_PANEL_BOE_TD4320) += panel-boe-td4320.o
 obj-$(CONFIG_DRM_PANEL_BOE_TH101MB31UIG002_28A) += panel-boe-th101mb31ig002-28a.o
 obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_LL2) += panel-boe-tv101wum-ll2.o
 obj-$(CONFIG_DRM_PANEL_BOE_TV101WUM_NL6) += panel-boe-tv101wum-nl6.o
diff --git a/drivers/gpu/drm/panel/panel-boe-td4320.c b/drivers/gpu/drm/panel/panel-boe-td4320.c
new file mode 100644
index 0000000000000000000000000000000000000000..697f10fd2aa4c7a46496890a2a2baa74a072dae5
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-boe-td4320.c
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (c) 2024 Barnabas Czeman <barnabas.czeman@mainlining.org>
+// Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+//   Copyright (c) 2013, The Linux Foundation. All rights reserved.
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.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>
+
+struct boe_td4320 {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+	struct gpio_desc *reset_gpio;
+};
+
+static inline struct boe_td4320 *to_boe_td4320(struct drm_panel *panel)
+{
+	return container_of(panel, struct boe_td4320, panel);
+}
+
+static void boe_td4320_reset(struct boe_td4320 *ctx)
+{
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	usleep_range(1000, 2000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(5000, 6000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	msleep(30);
+}
+
+static int boe_td4320_on(struct boe_td4320 *ctx)
+{
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x04);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8,
+					 0x19, 0x55, 0x00, 0xbe, 0x00, 0x00,
+					 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9,
+					 0x4d, 0x55, 0x05, 0xe6, 0x00, 0x02,
+					 0x03);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba,
+					 0x9b, 0x5b, 0x07, 0xe6, 0x00, 0x13,
+					 0x00);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf9,
+					 0x44, 0x3f, 0x00, 0x8d, 0xbf);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce,
+					 0x5d, 0x00, 0x0f, 0x1f, 0x2f, 0x3f,
+					 0x4f, 0x5f, 0x6f, 0x7f, 0x8f, 0x9f,
+					 0xaf, 0xbf, 0xcf, 0xdf, 0xef, 0xff,
+					 0x04, 0x00, 0x02, 0x02, 0x42, 0x01,
+					 0x69, 0x5a, 0x40, 0x40, 0x00, 0x00,
+					 0x04, 0xfa, 0x00);
+	mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x00b8);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY,
+				     0x2c);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0, 0x03);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x11, 0x00);
+	mipi_dsi_msleep(&dsi_ctx, 96);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0x29, 0x00);
+	mipi_dsi_msleep(&dsi_ctx, 20);
+
+	return dsi_ctx.accum_err;
+}
+
+static int boe_td4320_off(struct boe_td4320 *ctx)
+{
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 20);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 120);
+
+	return dsi_ctx.accum_err;
+}
+
+static int boe_td4320_prepare(struct drm_panel *panel)
+{
+	struct boe_td4320 *ctx = to_boe_td4320(panel);
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	boe_td4320_reset(ctx);
+
+	ret = boe_td4320_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;
+	}
+
+	return 0;
+}
+
+static int boe_td4320_unprepare(struct drm_panel *panel)
+{
+	struct boe_td4320 *ctx = to_boe_td4320(panel);
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	ret = boe_td4320_off(ctx);
+	if (ret < 0)
+		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+
+	return 0;
+}
+
+static const struct drm_display_mode boe_td4320_mode = {
+	.clock = (1080 + 86 + 2 + 100) * (2340 + 4 + 4 + 60) * 60 / 1000,
+	.hdisplay = 1080,
+	.hsync_start = 1080 + 86,
+	.hsync_end = 1080 + 86 + 2,
+	.htotal = 1080 + 86 + 2 + 100,
+	.vdisplay = 2340,
+	.vsync_start = 2340 + 4,
+	.vsync_end = 2340 + 4 + 4,
+	.vtotal = 2340 + 4 + 4 + 60,
+	.width_mm = 67,
+	.height_mm = 145,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int boe_td4320_get_modes(struct drm_panel *panel,
+				struct drm_connector *connector)
+{
+	return drm_connector_helper_get_modes_fixed(connector, &boe_td4320_mode);
+}
+
+static const struct drm_panel_funcs boe_td4320_panel_funcs = {
+	.prepare = boe_td4320_prepare,
+	.unprepare = boe_td4320_unprepare,
+	.get_modes = boe_td4320_get_modes,
+};
+
+static int boe_td4320_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct boe_td4320 *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	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 | MIPI_DSI_MODE_VIDEO_BURST |
+			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+	drm_panel_init(&ctx->panel, dev, &boe_td4320_panel_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+	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");
+
+	drm_panel_add(&ctx->panel);
+
+	ret = mipi_dsi_attach(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 boe_td4320_remove(struct mipi_dsi_device *dsi)
+{
+	struct boe_td4320 *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);
+}
+
+static const struct of_device_id boe_td4320_of_match[] = {
+	{ .compatible = "boe,td4320" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, boe_td4320_of_match);
+
+static struct mipi_dsi_driver boe_td4320_driver = {
+	.probe = boe_td4320_probe,
+	.remove = boe_td4320_remove,
+	.driver = {
+		.name = "panel-boe-td4320",
+		.of_match_table = boe_td4320_of_match,
+	},
+};
+module_mipi_dsi_driver(boe_td4320_driver);
+
+MODULE_AUTHOR("Barnabas Czeman <barnabas.czeman@mainlining.org>");
+MODULE_DESCRIPTION("DRM driver for boe td4320 fhdplus video mode dsi panel");
+MODULE_LICENSE("GPL");

-- 
2.49.0