From a6dfab2738fc2a47796d85f035a06efb6559c587 Mon Sep 17 00:00:00 2001
From: Jessica Zhang <quic_jesszhan@quicinc.com>
Date: Wed, 31 May 2023 11:12:33 -0700
Subject: drm/panel: Add driver for Visionox r66451 panel

Add support for the 1080x2340 Visionox R66451 AMOLED DSI panel that
comes with the Qualcomm HDK8350 display expansion pack.

The panel enables display compression (DSC v1.2) by default.

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230516-b4-r66451-panel-driver-v2-2-9c8d5eeef579@quicinc.com
---
 drivers/gpu/drm/panel/Kconfig                 |   9 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 drivers/gpu/drm/panel/panel-visionox-r66451.c | 390 ++++++++++++++++++++++++++
 3 files changed, 400 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-visionox-r66451.c

(limited to 'drivers/gpu/drm/panel')

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 203c0ef0bbfd..1a0fd0754692 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -793,6 +793,15 @@ config DRM_PANEL_VISIONOX_VTDR6130
 	  Say Y here if you want to enable support for Visionox
 	  VTDR6130 1080x2400 AMOLED DSI panel.
 
+config DRM_PANEL_VISIONOX_R66451
+	tristate "Visionox R66451"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	help
+	  Say Y here if you want to enable support for Visionox
+	  R66451 1080x2340 AMOLED DSI panel.
+
 config DRM_PANEL_WIDECHIPS_WS2401
 	tristate "Widechips WS2401 DPI panel driver"
 	depends on SPI && GPIOLIB
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 30cf553c8d1d..499e38244253 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -81,5 +81,6 @@ obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
 obj-$(CONFIG_DRM_PANEL_TRULY_NT35597_WQXGA) += panel-truly-nt35597.o
 obj-$(CONFIG_DRM_PANEL_VISIONOX_RM69299) += panel-visionox-rm69299.o
 obj-$(CONFIG_DRM_PANEL_VISIONOX_VTDR6130) += panel-visionox-vtdr6130.o
+obj-$(CONFIG_DRM_PANEL_VISIONOX_R66451) += panel-visionox-r66451.o
 obj-$(CONFIG_DRM_PANEL_WIDECHIPS_WS2401) += panel-widechips-ws2401.o
 obj-$(CONFIG_DRM_PANEL_XINPENG_XPP055C272) += panel-xinpeng-xpp055c272.o
diff --git a/drivers/gpu/drm/panel/panel-visionox-r66451.c b/drivers/gpu/drm/panel/panel-visionox-r66451.c
new file mode 100644
index 000000000000..00fc28ad3d07
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-visionox-r66451.c
@@ -0,0 +1,390 @@
+//SPDX-License-Identifier: GPL-2.0-only
+//Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
+
+#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 <drm/drm_mipi_dsi.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
+
+#include <video/mipi_display.h>
+
+struct visionox_r66451 {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+	struct gpio_desc *reset_gpio;
+	struct regulator_bulk_data supplies[2];
+	bool prepared, enabled;
+};
+
+static inline struct visionox_r66451 *to_visionox_r66451(struct drm_panel *panel)
+{
+	return container_of(panel, struct visionox_r66451, panel);
+}
+
+static void visionox_r66451_reset(struct visionox_r66451 *ctx)
+{
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	usleep_range(10000, 10100);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(10000, 10100);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	usleep_range(10000, 10100);
+}
+
+static int visionox_r66451_on(struct visionox_r66451 *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+
+	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+	mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, 0xc2,
+			       0x09, 0x24, 0x0c, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00,
+			       0x09, 0x3c);
+	mipi_dsi_dcs_write_seq(dsi, 0xd7,
+			       0x00, 0xb9, 0x3c, 0x00, 0x40, 0x04, 0x00, 0xa0, 0x0a,
+			       0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x19,
+			       0x3c, 0x00, 0x40, 0x04, 0x00, 0xa0, 0x0a);
+	mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x80);
+	mipi_dsi_dcs_write_seq(dsi, 0xde,
+			       0x40, 0x00, 0x18, 0x00, 0x18, 0x00, 0x18, 0x00, 0x18,
+			       0x10, 0x00, 0x18, 0x00, 0x18, 0x00, 0x18, 0x02, 0x00, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x04);
+	mipi_dsi_dcs_write_seq(dsi, 0xe8, 0x00, 0x02);
+	mipi_dsi_dcs_write_seq(dsi, 0xe4, 0x00, 0x08);
+	mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, 0xc4,
+			       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x32);
+	mipi_dsi_dcs_write_seq(dsi, 0xcf,
+			       0x64, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08,
+			       0x00, 0x0b, 0x77, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+			       0x02, 0x02, 0x02, 0x02, 0x02, 0x03);
+	mipi_dsi_dcs_write_seq(dsi, 0xd3,
+			       0x45, 0x00, 0x00, 0x01, 0x13, 0x15, 0x00, 0x15, 0x07,
+			       0x0f, 0x77, 0x77, 0x77, 0x37, 0xb2, 0x11, 0x00, 0xa0,
+			       0x3c, 0x9c);
+	mipi_dsi_dcs_write_seq(dsi, 0xd7,
+			       0x00, 0xb9, 0x34, 0x00, 0x40, 0x04, 0x00, 0xa0, 0x0a,
+			       0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x19,
+			       0x34, 0x00, 0x40, 0x04, 0x00, 0xa0, 0x0a);
+	mipi_dsi_dcs_write_seq(dsi, 0xd8,
+			       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x3a, 0x00, 0x3a, 0x00, 0x3a, 0x00, 0x3a, 0x00, 0x3a,
+			       0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x0a, 0x00, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a,
+			       0x00, 0x32, 0x00, 0x0a, 0x00, 0x22);
+	mipi_dsi_dcs_write_seq(dsi, 0xdf,
+			       0x50, 0x42, 0x58, 0x81, 0x2d, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x00, 0x6b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			       0x00, 0x00, 0x01, 0x0f, 0xff, 0xd4, 0x0e, 0x00, 0x00,
+			       0x00, 0x00, 0x00, 0x00, 0x0f, 0x53, 0xf1, 0x00, 0x00,
+			       0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, 0xf7, 0x01);
+	mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x80);
+	mipi_dsi_dcs_write_seq(dsi, 0xe4, 0x34, 0xb4, 0x00, 0x00, 0x00, 0x39, 0x04, 0x09, 0x34);
+	mipi_dsi_dcs_write_seq(dsi, 0xe6, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, 0xb0, 0x04);
+	mipi_dsi_dcs_write_seq(dsi, 0xdf, 0x50, 0x40);
+	mipi_dsi_dcs_write_seq(dsi, 0xf3, 0x50, 0x00, 0x00, 0x00, 0x00);
+	mipi_dsi_dcs_write_seq(dsi, 0xf2, 0x11);
+	mipi_dsi_dcs_write_seq(dsi, 0xf3, 0x01, 0x00, 0x00, 0x00, 0x01);
+	mipi_dsi_dcs_write_seq(dsi, 0xf4, 0x00, 0x02);
+	mipi_dsi_dcs_write_seq(dsi, 0xf2, 0x19);
+	mipi_dsi_dcs_write_seq(dsi, 0xdf, 0x50, 0x42);
+	mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+	mipi_dsi_dcs_set_column_address(dsi, 0, 1080 - 1);
+	mipi_dsi_dcs_set_page_address(dsi, 0, 2340 - 1);
+
+	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+	return 0;
+}
+
+static int visionox_r66451_off(struct visionox_r66451 *ctx)
+{
+	ctx->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+	return 0;
+}
+
+static int visionox_r66451_prepare(struct drm_panel *panel)
+{
+	struct visionox_r66451 *ctx = to_visionox_r66451(panel);
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	int ret;
+
+	if (ctx->prepared)
+		return 0;
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies),
+				    ctx->supplies);
+	if (ret < 0)
+		return ret;
+
+	visionox_r66451_reset(ctx);
+
+	ret = visionox_r66451_on(ctx);
+	if (ret < 0) {
+		dev_err(dev, "Failed to initialize panel: %d\n", ret);
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+		return ret;
+	}
+
+	mipi_dsi_compression_mode(ctx->dsi, true);
+
+	ctx->prepared = true;
+	return 0;
+}
+
+static int visionox_r66451_unprepare(struct drm_panel *panel)
+{
+	struct visionox_r66451 *ctx = to_visionox_r66451(panel);
+	struct device *dev = &ctx->dsi->dev;
+	int ret;
+
+	if (!ctx->prepared)
+		return 0;
+
+	ret = visionox_r66451_off(ctx);
+	if (ret < 0)
+		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+
+	ctx->prepared = false;
+	return 0;
+}
+
+static const struct drm_display_mode visionox_r66451_mode = {
+	.clock = 345830,
+	.hdisplay = 1080,
+	.hsync_start = 1175,
+	.hsync_end = 1176,
+	.htotal = 1216,
+	.vdisplay = 2340,
+	.vsync_start = 2365,
+	.vsync_end = 2366,
+	.vtotal = 2370,
+	.width_mm = 0,
+	.height_mm = 0,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int visionox_r66451_enable(struct drm_panel *panel)
+{
+	struct visionox_r66451 *ctx = to_visionox_r66451(panel);
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct drm_dsc_picture_parameter_set pps;
+	int ret;
+
+	if (ctx->enabled)
+		return 0;
+
+	if (!dsi->dsc) {
+		dev_err(&dsi->dev, "DSC not attached to DSI\n");
+		return -ENODEV;
+	}
+
+	drm_dsc_pps_payload_pack(&pps, dsi->dsc);
+	ret = mipi_dsi_picture_parameter_set(dsi, &pps);
+	if (ret) {
+		dev_err(&dsi->dev, "Failed to set PPS\n");
+		return ret;
+	}
+
+	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
+	if (ret < 0) {
+		dev_err(&dsi->dev, "Failed to exit sleep mode: %d\n", ret);
+		return ret;
+	}
+	msleep(120);
+
+	ret = mipi_dsi_dcs_set_display_on(dsi);
+	if (ret < 0) {
+		dev_err(&dsi->dev, "Failed on set display on: %d\n", ret);
+		return ret;
+	}
+	msleep(20);
+
+	ctx->enabled = true;
+
+	return 0;
+}
+
+static int visionox_r66451_disable(struct drm_panel *panel)
+{
+	struct visionox_r66451 *ctx = to_visionox_r66451(panel);
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	int ret;
+
+	ctx->enabled = false;
+
+	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(20);
+
+	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(120);
+
+	return 0;
+}
+
+static int visionox_r66451_get_modes(struct drm_panel *panel,
+				    struct drm_connector *connector)
+{
+	drm_connector_helper_get_modes_fixed(connector, &visionox_r66451_mode);
+	return 1;
+}
+
+static const struct drm_panel_funcs visionox_r66451_funcs = {
+	.prepare = visionox_r66451_prepare,
+	.unprepare = visionox_r66451_unprepare,
+	.get_modes = visionox_r66451_get_modes,
+	.enable = visionox_r66451_enable,
+	.disable = visionox_r66451_disable,
+};
+
+static int visionox_r66451_bl_update_status(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	u16 brightness = backlight_get_brightness(bl);
+
+	return mipi_dsi_dcs_set_display_brightness(dsi, brightness);
+}
+
+static const struct backlight_ops visionox_r66451_bl_ops = {
+	.update_status = visionox_r66451_bl_update_status,
+};
+
+static struct backlight_device *
+visionox_r66451_create_backlight(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	const struct backlight_properties props = {
+		.type = BACKLIGHT_RAW,
+		.brightness = 255,
+		.max_brightness = 4095,
+	};
+
+	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+					      &visionox_r66451_bl_ops, &props);
+}
+
+static int visionox_r66451_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct visionox_r66451 *ctx;
+	struct drm_dsc_config *dsc;
+	int ret = 0;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	dsc = devm_kzalloc(dev, sizeof(*dsc), GFP_KERNEL);
+	if (!dsc)
+		return -ENOMEM;
+
+	/* Set DSC params */
+	dsc->dsc_version_major = 0x1;
+	dsc->dsc_version_minor = 0x2;
+
+	dsc->slice_height = 20;
+	dsc->slice_width = 540;
+	dsc->slice_count = 2;
+	dsc->bits_per_component = 8;
+	dsc->bits_per_pixel = 8 << 4;
+	dsc->block_pred_enable = true;
+
+	dsi->dsc = dsc;
+
+	ctx->supplies[0].supply = "vddio";
+	ctx->supplies[1].supply = "vdd";
+
+	ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ctx->supplies),
+			ctx->supplies);
+
+	if (ret < 0)
+		return ret;
+
+	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	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_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS;
+
+	drm_panel_init(&ctx->panel, dev, &visionox_r66451_funcs, DRM_MODE_CONNECTOR_DSI);
+	ctx->panel.backlight = visionox_r66451_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;
+}
+
+static void visionox_r66451_remove(struct mipi_dsi_device *dsi)
+{
+	struct visionox_r66451 *ctx = mipi_dsi_get_drvdata(dsi);
+	int ret;
+
+	ret = mipi_dsi_detach(dsi);
+	if (ret < 0)
+		dev_err(&dsi->dev, "Failed to detach DSI host: %d\n", ret);
+
+	drm_panel_remove(&ctx->panel);
+}
+
+static const struct of_device_id visionox_r66451_of_match[] = {
+	{.compatible = "visionox,r66451"},
+	{ /*sentinel*/ }
+};
+MODULE_DEVICE_TABLE(of, visionox_r66451_of_match);
+
+static struct mipi_dsi_driver visionox_r66451_driver = {
+	.probe = visionox_r66451_probe,
+	.remove = visionox_r66451_remove,
+	.driver = {
+		.name = "panel-visionox-r66451",
+		.of_match_table = visionox_r66451_of_match,
+	},
+};
+
+module_mipi_dsi_driver(visionox_r66451_driver);
+
+MODULE_AUTHOR("Jessica Zhang <quic_jesszhan@quicinc.com>");
+MODULE_DESCRIPTION("Panel driver for the Visionox R66451 AMOLED DSI panel");
+MODULE_LICENSE("GPL");
-- 
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