drm/panel: Add panel driver for the Mantix MLAF057WE51-X DSI panel (72967d56) · Commits · 戴 / test

MAINTAINERS

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		@@ -5474,6 +5474,13 @@ S: Maintained
		F: drivers/gpu/drm/panel/panel-lvds.c
		F: Documentation/devicetree/bindings/display/panel/lvds.yaml

		DRM DRIVER FOR MANTIX MLAF057WE51 PANELS
		M: Guido Günther <agx@sigxcpu.org>
		R: Purism Kernel Team <kernel@puri.sm>
		S: Maintained
		F: Documentation/devicetree/bindings/display/panel/mantix,mlaf057we51-x.yaml
		F: drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c

		DRM DRIVER FOR MATROX G200/G400 GRAPHICS CARDS
		S: Orphan / Obsolete
		F: drivers/gpu/drm/mga/

drivers/gpu/drm/panel/Kconfig

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		@@ -217,6 +217,17 @@ config DRM_PANEL_NOVATEK_NT39016
		Say Y here if you want to enable support for the panels built
		around the Novatek NT39016 display controller.

		config DRM_PANEL_MANTIX_MLAF057WE51
		tristate "Mantix MLAF057WE51-X MIPI-DSI LCD 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 the Mantix
		MLAF057WE51-X MIPI DSI panel as e.g. used in the Librem 5. It
		has a resolution of 720x1440 pixels, a built in backlight and touch
		controller.

		config DRM_PANEL_OLIMEX_LCD_OLINUXINO
		tristate "Olimex LCD-OLinuXino panel"
		depends on OF

drivers/gpu/drm/panel/Makefile

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Original line number	Diff line number	Diff line
		@@ -20,6 +20,7 @@ obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
		obj-$(CONFIG_DRM_PANEL_NEC_NL8048HL11) += panel-nec-nl8048hl11.o
		obj-$(CONFIG_DRM_PANEL_NOVATEK_NT35510) += panel-novatek-nt35510.o
		obj-$(CONFIG_DRM_PANEL_NOVATEK_NT39016) += panel-novatek-nt39016.o
		obj-$(CONFIG_DRM_PANEL_MANTIX_MLAF057WE51) += panel-mantix-mlaf057we51.o
		obj-$(CONFIG_DRM_PANEL_OLIMEX_LCD_OLINUXINO) += panel-olimex-lcd-olinuxino.o
		obj-$(CONFIG_DRM_PANEL_ORISETECH_OTM8009A) += panel-orisetech-otm8009a.o
		obj-$(CONFIG_DRM_PANEL_OSD_OSD101T2587_53TS) += panel-osd-osd101t2587-53ts.o

drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c

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		// SPDX-License-Identifier: GPL-2.0
		/*
		* Mantix MLAF057WE51 5.7" MIPI-DSI panel driver
		*
		* Copyright (C) Purism SPC 2020
		*/

		#include <linux/backlight.h>
		#include <linux/delay.h>
		#include <linux/gpio/consumer.h>
		#include <linux/module.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>

		#define DRV_NAME "panel-mantix-mlaf057we51"

		/* Manufacturer specific Commands send via DSI */
		#define MANTIX_CMD_OTP_STOP_RELOAD_MIPI 0x41
		#define MANTIX_CMD_INT_CANCEL 0x4C

		struct mantix {
		struct device *dev;
		struct drm_panel panel;
		struct gpio_desc *reset_gpio;

		struct regulator *avdd;
		struct regulator *avee;
		struct regulator *vddi;
		};

		static inline struct mantix panel_to_mantix(struct drm_panel panel)
		{
		return container_of(panel, struct mantix, panel);
		}

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

		static int mantix_init_sequence(struct mantix *ctx)
		{
		struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
		struct device *dev = ctx->dev;

		/*
		* Init sequence was supplied by the panel vendor.
		*/
		dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A);

		dsi_generic_write_seq(dsi, MANTIX_CMD_INT_CANCEL, 0x03);
		dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x03);
		dsi_generic_write_seq(dsi, 0x80, 0xA9, 0x00);

		dsi_generic_write_seq(dsi, MANTIX_CMD_OTP_STOP_RELOAD_MIPI, 0x5A, 0x09);
		dsi_generic_write_seq(dsi, 0x80, 0x64, 0x00, 0x64, 0x00, 0x00);
		msleep(20);

		dev_dbg(dev, "Panel init sequence done\n");
		return 0;
		}

		static int mantix_enable(struct drm_panel *panel)
		{
		struct mantix *ctx = panel_to_mantix(panel);
		struct device *dev = ctx->dev;
		struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
		int ret;

		ret = mantix_init_sequence(ctx);
		if (ret < 0) {
		dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
		return ret;
		}

		ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
		if (ret < 0) {
		dev_err(dev, "Failed to exit sleep mode\n");
		return ret;
		}
		msleep(20);

		ret = mipi_dsi_dcs_set_display_on(dsi);
		if (ret)
		return ret;
		usleep_range(10000, 12000);

		ret = mipi_dsi_turn_on_peripheral(dsi);
		if (ret < 0) {
		dev_err(dev, "Failed to turn on peripheral\n");
		return ret;
		}

		return 0;
		}

		static int mantix_disable(struct drm_panel *panel)
		{
		struct mantix *ctx = panel_to_mantix(panel);
		struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
		int ret;

		ret = mipi_dsi_dcs_set_display_off(dsi);
		if (ret < 0)
		dev_err(ctx->dev, "Failed to turn off the display: %d\n", ret);

		ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
		if (ret < 0)
		dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);


		return 0;
		}

		static int mantix_unprepare(struct drm_panel *panel)
		{
		struct mantix *ctx = panel_to_mantix(panel);

		regulator_disable(ctx->avee);
		regulator_disable(ctx->avdd);
		/* T11 */
		usleep_range(5000, 6000);
		regulator_disable(ctx->vddi);
		/* T14 */
		msleep(50);

		return 0;
		}

		static int mantix_prepare(struct drm_panel *panel)
		{
		struct mantix *ctx = panel_to_mantix(panel);
		int ret;

		/* Focaltech FT8006P, section 7.3.1 and 7.3.4 */
		dev_dbg(ctx->dev, "Resetting the panel\n");
		ret = regulator_enable(ctx->vddi);
		if (ret < 0) {
		dev_err(ctx->dev, "Failed to enable vddi supply: %d\n", ret);
		return ret;
		}

		/* T1 + T2 */
		usleep_range(8000, 10000);

		ret = regulator_enable(ctx->avdd);
		if (ret < 0) {
		dev_err(ctx->dev, "Failed to enable avdd supply: %d\n", ret);
		return ret;
		}

		/* T2d */
		usleep_range(3500, 4000);
		ret = regulator_enable(ctx->avee);
		if (ret < 0) {
		dev_err(ctx->dev, "Failed to enable avee supply: %d\n", ret);
		return ret;
		}

		/* T3+T5 */
		usleep_range(10000, 12000);

		gpiod_set_value_cansleep(ctx->reset_gpio, 1);
		usleep_range(5150, 7000);

		gpiod_set_value_cansleep(ctx->reset_gpio, 0);

		/* T6 */
		msleep(50);

		return 0;
		}

		static const struct drm_display_mode default_mode = {
		.hdisplay = 720,
		.hsync_start = 720 + 45,
		.hsync_end = 720 + 45 + 14,
		.htotal = 720 + 45 + 14 + 25,
		.vdisplay = 1440,
		.vsync_start = 1440 + 130,
		.vsync_end = 1440 + 130 + 8,
		.vtotal = 1440 + 130 + 8 + 106,
		.clock = 85298,
		.flags = DRM_MODE_FLAG_NHSYNC \| DRM_MODE_FLAG_NVSYNC,
		.width_mm = 65,
		.height_mm = 130,
		};

		static int mantix_get_modes(struct drm_panel *panel,
		struct drm_connector *connector)
		{
		struct mantix *ctx = panel_to_mantix(panel);
		struct drm_display_mode *mode;

		mode = drm_mode_duplicate(connector->dev, &default_mode);
		if (!mode) {
		dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
		default_mode.hdisplay, default_mode.vdisplay,
		drm_mode_vrefresh(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 mantix_drm_funcs = {
		.disable = mantix_disable,
		.unprepare = mantix_unprepare,
		.prepare = mantix_prepare,
		.enable = mantix_enable,
		.get_modes = mantix_get_modes,
		};

		static int mantix_probe(struct mipi_dsi_device *dsi)
		{
		struct device *dev = &dsi->dev;
		struct mantix *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_LOW);
		if (IS_ERR(ctx->reset_gpio)) {
		dev_err(dev, "cannot get reset gpio\n");
		return PTR_ERR(ctx->reset_gpio);
		}

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

		dsi->lanes = 4;
		dsi->format = MIPI_DSI_FMT_RGB888;
		dsi->mode_flags = MIPI_DSI_MODE_VIDEO \|
		MIPI_DSI_MODE_VIDEO_BURST \| MIPI_DSI_MODE_VIDEO_SYNC_PULSE;

		ctx->avdd = devm_regulator_get(dev, "avdd");
		if (IS_ERR(ctx->avdd))
		return dev_err_probe(dev, PTR_ERR(ctx->avdd), "Failed to request avdd regulator\n");

		ctx->avee = devm_regulator_get(dev, "avee");
		if (IS_ERR(ctx->avee))
		return dev_err_probe(dev, PTR_ERR(ctx->avee), "Failed to request avee regulator\n");

		ctx->vddi = devm_regulator_get(dev, "vddi");
		if (IS_ERR(ctx->vddi))
		return dev_err_probe(dev, PTR_ERR(ctx->vddi), "Failed to request vddi regulator\n");

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

		ret = drm_panel_of_backlight(&ctx->panel);
		if (ret)
		return ret;

		drm_panel_add(&ctx->panel);

		ret = mipi_dsi_attach(dsi);
		if (ret < 0) {
		dev_err(dev, "mipi_dsi_attach failed (%d). Is host ready?\n", ret);
		drm_panel_remove(&ctx->panel);
		return ret;
		}

		dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
		default_mode.hdisplay, default_mode.vdisplay,
		drm_mode_vrefresh(&default_mode),
		mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);

		return 0;
		}

		static void mantix_shutdown(struct mipi_dsi_device *dsi)
		{
		struct mantix *ctx = mipi_dsi_get_drvdata(dsi);

		drm_panel_unprepare(&ctx->panel);
		drm_panel_disable(&ctx->panel);
		}

		static int mantix_remove(struct mipi_dsi_device *dsi)
		{
		struct mantix *ctx = mipi_dsi_get_drvdata(dsi);

		mantix_shutdown(dsi);

		mipi_dsi_detach(dsi);
		drm_panel_remove(&ctx->panel);

		return 0;
		}

		static const struct of_device_id mantix_of_match[] = {
		{ .compatible = "mantix,mlaf057we51-x" },
		{ /* sentinel */ }
		};
		MODULE_DEVICE_TABLE(of, mantix_of_match);

		static struct mipi_dsi_driver mantix_driver = {
		.probe = mantix_probe,
		.remove = mantix_remove,
		.shutdown = mantix_shutdown,
		.driver = {
		.name = DRV_NAME,
		.of_match_table = mantix_of_match,
		},
		};
		module_mipi_dsi_driver(mantix_driver);

		MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>");
		MODULE_DESCRIPTION("DRM driver for Mantix MLAF057WE51-X MIPI DSI panel");
		MODULE_LICENSE("GPL v2");

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