From 39c64936606b9c3eff787195531c4f3b6cde0903 Mon Sep 17 00:00:00 2001
From: chalkin <chalkin@yeah.net>
Date: Sat, 21 Sep 2024 18:19:35 +0800
Subject: [PATCH 16/62] drm/panel: Add panel driver for samsung amsa26zp01

Signed-off-by: Jiali Chen <chenjiali@radxa.com>
---
 drivers/gpu/drm/panel/Kconfig                 |  11 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-samsung-amsa26zp01.c  | 302 ++++++++++++++++++
 3 files changed, 314 insertions(+)
 create mode 100644 drivers/gpu/drm/panel/panel-samsung-amsa26zp01.c

diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 09b9f7ff9340..c6f8382b0212 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -726,6 +726,17 @@ config DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01
 	select DRM_MIPI_DSI
 	select VIDEOMODE_HELPERS
 
+config DRM_PANEL_SAMSUNG_AMSA26ZP01
+	tristate "Samsung AMSA26ZP01 DSI panel"
+	depends on OF
+	depends on DRM_MIPI_DSI
+	depends on BACKLIGHT_CLASS_DEVICE
+	select DRM_DISPLAY_DP_HELPER
+	select DRM_DISPLAY_HELPER
+	help
+	  DRM panel driver for the Samsung AMSA26ZP01 panel.
+	  This panel has a resolution of 2560x1600 @ 60hz or 120Hz.
+
 config DRM_PANEL_SAMSUNG_ATNA33XC20
 	tristate "Samsung ATNA33XC20 eDP panel"
 	depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 957555b49996..f297fc90f99e 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -71,6 +71,7 @@ obj-$(CONFIG_DRM_PANEL_RENESAS_R69328) += panel-renesas-r69328.o
 obj-$(CONFIG_DRM_PANEL_RONBO_RB070D30) += panel-ronbo-rb070d30.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMS581VF01) += panel-samsung-ams581vf01.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMS639RQ08) += panel-samsung-ams639rq08.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_AMSA26ZP01) += panel-samsung-amsa26zp01.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_ATNA33XC20) += panel-samsung-atna33xc20.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) += panel-samsung-db7430.o
 obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
diff --git a/drivers/gpu/drm/panel/panel-samsung-amsa26zp01.c b/drivers/gpu/drm/panel/panel-samsung-amsa26zp01.c
new file mode 100644
index 000000000000..8fe62ff43909
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-amsa26zp01.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+//   Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
+//   Copyright (c) 2024 chalkin Deng <chalkin@chalkin@yeah.net>
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include <video/mipi_display.h>
+
+#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_probe_helper.h>
+
+struct samsung_amsa26zp01 {
+	struct drm_panel panel;
+	struct mipi_dsi_device *dsi;
+	struct drm_dsc_config dsc;
+	struct gpio_desc *reset_gpio;
+	struct regulator_bulk_data supplies[2];
+};
+
+static inline
+struct samsung_amsa26zp01 *to_samsung_amsa26zp01(struct drm_panel *panel)
+{
+	return container_of(panel, struct samsung_amsa26zp01, panel);
+}
+
+static void samsung_amsa26zp01_reset(struct samsung_amsa26zp01 *ctx)
+{
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	usleep_range(2000, 3000);
+	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+	msleep(400);
+}
+
+static void samsung_amsa26zp01_on(struct mipi_dsi_multi_context *dsi_ctx)
+{
+
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xf0, 0x5a, 0x5a);
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xf1, 0x5a, 0x5a);
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xfc, 0x5a, 0x5a);
+
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xf8, 0x58, 0x00, 0x10, 0x54);
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xf9, 0x04, 0x85);
+	/* refresh rate Transition */
+	/* 60 Hz */
+	// mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x60, 0x00);
+	/* 120 Hz */
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, 0x60, 0x20);
+	mipi_dsi_msleep(dsi_ctx, 50);
+	// #define SAMSUNG_BRIGHTNESS_MODE	0x53
+	// mipi_dsi_generic_write_seq_multi(dsi_ctx, SAMSUNG_BRIGHTNESS_MODE, 0xE0);
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x28);  /* 0x20:Normal mode + Smooth dimming off; 0x28: Normal mode + Smooth dimming on */
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xf8, 0x58, 0x00, 0x30, 0x35);
+	mipi_dsi_msleep(dsi_ctx, 100);
+	mipi_dsi_generic_write_seq_multi(dsi_ctx, 0xf9, 0xc0, 0x2b);
+	mipi_dsi_msleep(dsi_ctx, 100);
+	mipi_dsi_dcs_set_display_on_multi(dsi_ctx);
+}
+
+static int samsung_amsa26zp01_disable(struct drm_panel *panel)
+{
+	struct samsung_amsa26zp01 *ctx = to_samsung_amsa26zp01(panel);
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+
+	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 100);
+
+	return dsi_ctx.accum_err;
+}
+
+static int samsung_amsa26zp01_prepare(struct drm_panel *panel)
+{
+	struct samsung_amsa26zp01 *ctx = to_samsung_amsa26zp01(panel);
+	struct drm_dsc_picture_parameter_set pps;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
+
+	dsi_ctx.accum_err = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	if (dsi_ctx.accum_err)
+		return dsi_ctx.accum_err;
+
+	samsung_amsa26zp01_reset(ctx);
+
+	samsung_amsa26zp01_on(&dsi_ctx);
+
+	drm_dsc_pps_payload_pack(&pps, &ctx->dsc);
+	// print_hex_dump_bytes("pps: ", DUMP_PREFIX_OFFSET, &pps, sizeof(pps));
+	mipi_dsi_picture_parameter_set_multi(&dsi_ctx, &pps);
+	mipi_dsi_compression_mode_ext_multi(&dsi_ctx, true, MIPI_DSI_COMPRESSION_DSC, 0);
+	mipi_dsi_msleep(&dsi_ctx, 28);
+
+	if (dsi_ctx.accum_err) {
+		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	}
+
+	return dsi_ctx.accum_err;
+}
+
+static int samsung_amsa26zp01_unprepare(struct drm_panel *panel)
+{
+	struct samsung_amsa26zp01 *ctx = to_samsung_amsa26zp01(panel);
+
+	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+
+	return 0;
+}
+
+static const struct drm_display_mode samsung_2k_dsc_60_mode = {
+	.clock = (2560 + 12 + 12 + 20) * (1600 + 12 + 2 + 16) * 60 / 1000,
+	.hdisplay = 2560,
+	.hsync_start = 2560 + 12,
+	.hsync_end = 2560 + 12 + 12,
+	.htotal = 2560 + 12 + 12 + 20,
+	.vdisplay = 1600,
+	.vsync_start = 1600 + 12,
+	.vsync_end = 1600 + 12 + 2,
+	.vtotal = 1600 + 12 + 2 + 16,
+	.width_mm = 271,
+	.height_mm = 170,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static const struct drm_display_mode samsung_2k_dsc_120_mode = {
+	.clock = (2560 + 20 + 12 + 20) * (1600 + 8 + 2 + 16) * 120 / 1000,
+	.hdisplay = 2560,
+	.hsync_start = 2560 + 20,
+	.hsync_end = 2560 + 20 + 12,
+	.htotal = 2560 + 20 + 12 + 20,
+	.vdisplay = 1600,
+	.vsync_start = 1600 + 8,
+	.vsync_end = 1600 + 8 + 2,
+	.vtotal = 1600 + 8 + 2 + 16,
+	.width_mm = 271,
+	.height_mm = 170,
+	.type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int samsung_amsa26zp01_get_modes(struct drm_panel *panel,
+				     struct drm_connector *connector)
+{
+	int count = 0;
+
+	/* Initialize 120Hz first */
+	count += drm_connector_helper_get_modes_fixed(connector, &samsung_2k_dsc_120_mode);
+	count += drm_connector_helper_get_modes_fixed(connector, &samsung_2k_dsc_60_mode);
+
+	return count;
+
+}
+
+static const struct drm_panel_funcs samsung_amsa26zp01_panel_funcs = {
+	.prepare = samsung_amsa26zp01_prepare,
+	.unprepare  = samsung_amsa26zp01_unprepare,
+	.disable = samsung_amsa26zp01_disable,
+	.get_modes = samsung_amsa26zp01_get_modes,
+};
+
+static int samsung_amsa26zp01_bl_update_status(struct backlight_device *bl)
+{
+	struct mipi_dsi_device *dsi = bl_get_data(bl);
+	u16 brightness = backlight_get_brightness(bl);
+	int ret;
+
+	ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static const struct backlight_ops samsung_amsa26zp01_bl_ops = {
+	.update_status = samsung_amsa26zp01_bl_update_status,
+};
+
+static struct backlight_device *
+samsung_amsa26zp01_create_backlight(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	const struct backlight_properties props = {
+		.type = BACKLIGHT_RAW,
+		.brightness = 1024,
+		.max_brightness = 2047,
+	};
+
+	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+					      &samsung_amsa26zp01_bl_ops, &props);
+}
+
+static int samsung_amsa26zp01_probe(struct mipi_dsi_device *dsi)
+{
+	struct device *dev = &dsi->dev;
+	struct samsung_amsa26zp01 *ctx;
+	int ret;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->supplies[0].supply = "vddio";
+	ctx->supplies[1].supply = "vdd";
+
+	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to get vddio regulator\n");
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
+	if (ret)
+		dev_err(dev, "Failed to enable regulators: %d\n", 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-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;
+
+	drm_panel_init(&ctx->panel, dev, &samsung_amsa26zp01_panel_funcs,
+		       DRM_MODE_CONNECTOR_DSI);
+	ctx->panel.prepare_prev_first = true;
+
+	drm_panel_add(&ctx->panel);
+
+	ctx->panel.backlight = samsung_amsa26zp01_create_backlight(dsi);
+	if (IS_ERR(ctx->panel.backlight))
+		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
+				     "Failed to create backlight\n");
+
+
+	/* This panel only supports DSC; unconditionally enable it */
+	dsi->dsc = &ctx->dsc;
+
+	ctx->dsc.dsc_version_major = 1;
+	ctx->dsc.dsc_version_minor = 1;
+
+	/* TODO: Pass slice_per_pkt = 2 */
+	ctx->dsc.slice_height = 100;
+	ctx->dsc.slice_width = 1280;
+	/*
+	 * TODO: hdisplay should be read from the selected mode once
+	 * it is passed back to drm_panel (in prepare?)
+	 */
+	WARN_ON(2560 % ctx->dsc.slice_width);
+	ctx->dsc.slice_count = 2560 / ctx->dsc.slice_width;
+	ctx->dsc.bits_per_component = 8;
+	ctx->dsc.bits_per_pixel = 8 << 4; /* 4 fractional bits */
+	ctx->dsc.block_pred_enable = true;
+
+	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 samsung_amsa26zp01_remove(struct mipi_dsi_device *dsi)
+{
+	struct samsung_amsa26zp01 *ctx = mipi_dsi_get_drvdata(dsi);
+
+	drm_panel_remove(&ctx->panel);
+}
+
+static const struct of_device_id samsung_amsa26zp01_of_match[] = {
+	{ .compatible = "samsung,amsa26zp01" }, //amsa26zp01
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, samsung_amsa26zp01_of_match);
+
+static struct mipi_dsi_driver samsung_amsa26zp01_driver = {
+	.probe = samsung_amsa26zp01_probe,
+	.remove = samsung_amsa26zp01_remove,
+	.driver = {
+		.name = "panel-samsung-amsa26zp01",
+		.of_match_table = samsung_amsa26zp01_of_match,
+	},
+};
+module_mipi_dsi_driver(samsung_amsa26zp01_driver);
+
+MODULE_AUTHOR("Chalkin <chalkin@yeah.net>");
+MODULE_DESCRIPTION("DRM driver for Samsung AMSA26ZP01 DSC DSI panel");
+MODULE_LICENSE("GPL");
\ No newline at end of file
-- 
2.47.3