drm/panel: Add Samsung s6e88a0-ams452ef01 panel driver (6d598a32) · Commits · 戴 / test

drivers/gpu/drm/panel/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -293,6 +293,12 @@ config DRM_PANEL_SAMSUNG_S6E63M0
		Say Y here if you want to enable support for Samsung S6E63M0
		AMOLED LCD panel.

		config DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01
		tristate "Samsung AMS452EF01 panel with S6E88A0 DSI video mode controller"
		depends on OF
		select DRM_MIPI_DSI
		select VIDEOMODE_HELPERS

		config DRM_PANEL_SAMSUNG_S6E8AA0
		tristate "Samsung S6E8AA0 DSI video mode panel"
		depends on OF

drivers/gpu/drm/panel/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -30,6 +30,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D16D0) += panel-samsung-s6d16d0.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0) += panel-samsung-s6e63m0.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01) += panel-samsung-s6e88a0-ams452ef01.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
		obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o
		obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o

drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c

0 → 100644

+293 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		// Copyright (C) 2019, Michael Srba

		#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>

		struct s6e88a0_ams452ef01 {
		struct drm_panel panel;
		struct mipi_dsi_device *dsi;
		struct regulator_bulk_data supplies[2];
		struct gpio_desc *reset_gpio;

		bool prepared;
		};

		static inline struct
		s6e88a0_ams452ef01 to_s6e88a0_ams452ef01(struct drm_panel panel)
		{
		return container_of(panel, struct s6e88a0_ams452ef01, panel);
		}

		#define dsi_dcs_write_seq(dsi, seq...) do { \
		static const u8 d[] = { seq }; \
		int ret; \
		ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
		if (ret < 0) \
		return ret; \
		} while (0)

		static void s6e88a0_ams452ef01_reset(struct s6e88a0_ams452ef01 *ctx)
		{
		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
		usleep_range(5000, 6000);
		gpiod_set_value_cansleep(ctx->reset_gpio, 0);
		usleep_range(1000, 2000);
		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
		usleep_range(10000, 11000);
		}

		static int s6e88a0_ams452ef01_on(struct s6e88a0_ams452ef01 *ctx)
		{
		struct mipi_dsi_device *dsi = ctx->dsi;
		struct device *dev = &dsi->dev;
		int ret;

		dsi->mode_flags \|= MIPI_DSI_MODE_LPM;

		dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a); // enable LEVEL2 commands
		dsi_dcs_write_seq(dsi, 0xcc, 0x4c); // set Pixel Clock Divider polarity

		ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
		if (ret < 0) {
		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
		return ret;
		}
		msleep(120);

		// set default brightness/gama
		dsi_dcs_write_seq(dsi, 0xca,
		0x01, 0x00, 0x01, 0x00, 0x01, 0x00, // V255 RR,GG,BB
		0x80, 0x80, 0x80, // V203 R,G,B
		0x80, 0x80, 0x80, // V151 R,G,B
		0x80, 0x80, 0x80, // V87 R,G,B
		0x80, 0x80, 0x80, // V51 R,G,B
		0x80, 0x80, 0x80, // V35 R,G,B
		0x80, 0x80, 0x80, // V23 R,G,B
		0x80, 0x80, 0x80, // V11 R,G,B
		0x6b, 0x68, 0x71, // V3 R,G,B
		0x00, 0x00, 0x00); // V1 R,G,B
		// set default Amoled Off Ratio
		dsi_dcs_write_seq(dsi, 0xb2, 0x40, 0x0a, 0x17, 0x00, 0x0a);
		dsi_dcs_write_seq(dsi, 0xb6, 0x2c, 0x0b); // set default elvss voltage
		dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
		dsi_dcs_write_seq(dsi, 0xf7, 0x03); // gamma/aor update
		dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5); // disable LEVEL2 commands

		ret = mipi_dsi_dcs_set_display_on(dsi);
		if (ret < 0) {
		dev_err(dev, "Failed to set display on: %d\n", ret);
		return ret;
		}

		return 0;
		}

		static int s6e88a0_ams452ef01_off(struct s6e88a0_ams452ef01 *ctx)
		{
		struct mipi_dsi_device *dsi = ctx->dsi;
		struct device *dev = &dsi->dev;
		int ret;

		dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;

		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(35);

		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 s6e88a0_ams452ef01_prepare(struct drm_panel *panel)
		{
		struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
		struct device *dev = &ctx->dsi->dev;
		int ret;

		if (ctx->prepared)
		return 0;

		ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
		if (ret < 0) {
		dev_err(dev, "Failed to enable regulators: %d\n", ret);
		return ret;
		}

		s6e88a0_ams452ef01_reset(ctx);

		ret = s6e88a0_ams452ef01_on(ctx);
		if (ret < 0) {
		dev_err(dev, "Failed to initialize panel: %d\n", ret);
		gpiod_set_value_cansleep(ctx->reset_gpio, 0);
		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
		ctx->supplies);
		return ret;
		}

		ctx->prepared = true;
		return 0;
		}

		static int s6e88a0_ams452ef01_unprepare(struct drm_panel *panel)
		{
		struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
		struct device *dev = &ctx->dsi->dev;
		int ret;

		if (!ctx->prepared)
		return 0;

		ret = s6e88a0_ams452ef01_off(ctx);
		if (ret < 0)
		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);

		gpiod_set_value_cansleep(ctx->reset_gpio, 0);
		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);

		ctx->prepared = false;
		return 0;
		}

		static const struct drm_display_mode s6e88a0_ams452ef01_mode = {
		.clock = (540 + 88 + 4 + 20) * (960 + 14 + 2 + 8) * 60 / 1000,
		.hdisplay = 540,
		.hsync_start = 540 + 88,
		.hsync_end = 540 + 88 + 4,
		.htotal = 540 + 88 + 4 + 20,
		.vdisplay = 960,
		.vsync_start = 960 + 14,
		.vsync_end = 960 + 14 + 2,
		.vtotal = 960 + 14 + 2 + 8,
		.vrefresh = 60,
		.width_mm = 56,
		.height_mm = 100,
		};

		static int s6e88a0_ams452ef01_get_modes(struct drm_panel *panel,
		struct drm_connector *connector)
		{
		struct drm_display_mode *mode;

		mode = drm_mode_duplicate(connector->dev, &s6e88a0_ams452ef01_mode);
		if (!mode)
		return -ENOMEM;

		drm_mode_set_name(mode);

		mode->type = DRM_MODE_TYPE_DRIVER \| DRM_MODE_TYPE_PREFERRED;
		connector->display_info.width_mm = mode->width_mm;
		connector->display_info.height_mm = mode->height_mm;
		drm_mode_probed_add(connector, mode);

		return 1;
		}

		static const struct drm_panel_funcs s6e88a0_ams452ef01_panel_funcs = {
		.unprepare = s6e88a0_ams452ef01_unprepare,
		.prepare = s6e88a0_ams452ef01_prepare,
		.get_modes = s6e88a0_ams452ef01_get_modes,
		};

		static int s6e88a0_ams452ef01_probe(struct mipi_dsi_device *dsi)
		{
		struct device *dev = &dsi->dev;
		struct s6e88a0_ams452ef01 *ctx;
		int ret;

		ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
		if (!ctx)
		return -ENOMEM;

		ctx->supplies[0].supply = "vdd3";
		ctx->supplies[1].supply = "vci";
		ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
		ctx->supplies);
		if (ret < 0) {
		dev_err(dev, "Failed to get regulators: %d\n", ret);
		return ret;
		}

		ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
		if (IS_ERR(ctx->reset_gpio)) {
		ret = PTR_ERR(ctx->reset_gpio);
		dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
		return ret;
		}

		ctx->dsi = dsi;
		mipi_dsi_set_drvdata(dsi, ctx);

		dsi->lanes = 2;
		dsi->format = MIPI_DSI_FMT_RGB888;
		dsi->mode_flags = MIPI_DSI_MODE_VIDEO \| MIPI_DSI_MODE_VIDEO_BURST;

		drm_panel_init(&ctx->panel, dev, &s6e88a0_ams452ef01_panel_funcs,
		DRM_MODE_CONNECTOR_DSI);

		ret = drm_panel_add(&ctx->panel);
		if (ret < 0) {
		dev_err(dev, "Failed to add panel: %d\n", ret);
		return ret;
		}

		ret = mipi_dsi_attach(dsi);
		if (ret < 0) {
		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
		return ret;
		}

		return 0;
		}

		static int s6e88a0_ams452ef01_remove(struct mipi_dsi_device *dsi)
		{
		struct s6e88a0_ams452ef01 *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);

		return 0;
		}

		static const struct of_device_id s6e88a0_ams452ef01_of_match[] = {
		{ .compatible = "samsung,s6e88a0-ams452ef01" },
		{ /* sentinel */ },
		};
		MODULE_DEVICE_TABLE(of, s6e88a0_ams452ef01_of_match);

		static struct mipi_dsi_driver s6e88a0_ams452ef01_driver = {
		.probe = s6e88a0_ams452ef01_probe,
		.remove = s6e88a0_ams452ef01_remove,
		.driver = {
		.name = "panel-s6e88a0-ams452ef01",
		.of_match_table = s6e88a0_ams452ef01_of_match,
		},
		};
		module_mipi_dsi_driver(s6e88a0_ams452ef01_driver);

		MODULE_AUTHOR("Michael Srba <Michael.Srba@seznam.cz>");
		MODULE_DESCRIPTION("MIPI-DSI based Panel Driver for AMS452EF01 AMOLED LCD with a S6E88A0 controller");
		MODULE_LICENSE("GPL v2");

Admin message