tianma_499_720p_video_v2

panel-simple-tianma-499-v2.c

// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2013, The Linux Foundation. All rights reserved.

static const struct drm_display_mode tianma_499_v2_mode = {
	.clock = (720 + 52 + 20 + 84) * (1280 + 20 + 8 + 20) * 60 / 1000,
	.hdisplay = 720,
	.hsync_start = 720 + 52,
	.hsync_end = 720 + 52 + 20,
	.htotal = 720 + 52 + 20 + 84,
	.vdisplay = 1280,
	.vsync_start = 1280 + 20,
	.vsync_end = 1280 + 20 + 8,
	.vtotal = 1280 + 20 + 8 + 20,
	.vrefresh = 60,
	.width_mm = 62,
	.height_mm = 110,
};

static const struct panel_desc_dsi tianma_499_v2 = {
	.desc = {
		.modes = &tianma_499_v2_mode,
		.num_modes = 1,
		.bpc = 8,
		.size = {
			.width = 62,
			.height = 110,
		},
	},
	.flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
		 MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_CLOCK_NON_CONTINUOUS |
		 MIPI_DSI_MODE_LPM,
	.format = MIPI_DSI_FMT_RGB888,
	.lanes = 4,
};

panel-tianma-499-v2.c

// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2013, The Linux Foundation. All rights reserved.

#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#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>

struct tianma_499_v2 {
	struct drm_panel panel;
	struct mipi_dsi_device *dsi;
	struct backlight_device *backlight;
	struct gpio_desc *reset_gpio;

	bool prepared;
	bool enabled;
};

static inline struct tianma_499_v2 *to_tianma_499_v2(struct drm_panel *panel)
{
	return container_of(panel, struct tianma_499_v2, 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 tianma_499_v2_reset(struct tianma_499_v2 *ctx)
{
	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	usleep_range(1000, 2000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	usleep_range(10000, 11000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	msleep(20);
}

static int tianma_499_v2_on(struct tianma_499_v2 *ctx)
{
	struct mipi_dsi_device *dsi = ctx->dsi;
	struct device *dev = &dsi->dev;
	int ret;

	dsi_dcs_write_seq(dsi, 0xff, 0x98, 0x81, 0x00);

	ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x0000);
	if (ret < 0) {
		dev_err(dev, "Failed to set display brightness: %d\n", ret);
		return ret;
	}

	dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x2c);
	dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x01);
	dsi_dcs_write_seq(dsi, 0x68, 0x06);

	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);

	ret = mipi_dsi_dcs_set_display_on(dsi);
	if (ret < 0) {
		dev_err(dev, "Failed to set display on: %d\n", ret);
		return ret;
	}
	msleep(20);

	return 0;
}

static int tianma_499_v2_off(struct tianma_499_v2 *ctx)
{
	struct mipi_dsi_device *dsi = ctx->dsi;
	struct device *dev = &dsi->dev;
	int ret;

	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 tianma_499_v2_prepare(struct drm_panel *panel)
{
	struct tianma_499_v2 *ctx = to_tianma_499_v2(panel);
	struct device *dev = &ctx->dsi->dev;
	int ret;

	if (ctx->prepared)
		return 0;

	tianma_499_v2_reset(ctx);

	ret = tianma_499_v2_on(ctx);
	if (ret < 0) {
		dev_err(dev, "Failed to initialize panel: %d\n", ret);
		gpiod_set_value_cansleep(ctx->reset_gpio, 0);
		return ret;
	}

	ctx->prepared = true;
	return 0;
}

static int tianma_499_v2_unprepare(struct drm_panel *panel)
{
	struct tianma_499_v2 *ctx = to_tianma_499_v2(panel);
	struct device *dev = &ctx->dsi->dev;
	int ret;

	if (!ctx->prepared)
		return 0;

	ret = tianma_499_v2_off(ctx);
	if (ret < 0)
		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);

	gpiod_set_value_cansleep(ctx->reset_gpio, 0);

	ctx->prepared = false;
	return 0;
}

static int tianma_499_v2_enable(struct drm_panel *panel)
{
	struct tianma_499_v2 *ctx = to_tianma_499_v2(panel);
	int ret;

	if (ctx->enabled)
		return 0;

	ret = backlight_enable(ctx->backlight);
	if (ret < 0) {
		dev_err(&ctx->dsi->dev, "Failed to enable backlight: %d\n", ret);
		return ret;
	}

	ctx->enabled = true;
	return 0;
}

static int tianma_499_v2_disable(struct drm_panel *panel)
{
	struct tianma_499_v2 *ctx = to_tianma_499_v2(panel);
	int ret;

	if (!ctx->enabled)
		return 0;

	ret = backlight_disable(ctx->backlight);
	if (ret < 0) {
		dev_err(&ctx->dsi->dev, "Failed to disable backlight: %d\n", ret);
		return ret;
	}

	ctx->enabled = false;
	return 0;
}

static const struct drm_display_mode tianma_499_v2_mode = {
	.clock = (720 + 52 + 20 + 84) * (1280 + 20 + 8 + 20) * 60 / 1000,
	.hdisplay = 720,
	.hsync_start = 720 + 52,
	.hsync_end = 720 + 52 + 20,
	.htotal = 720 + 52 + 20 + 84,
	.vdisplay = 1280,
	.vsync_start = 1280 + 20,
	.vsync_end = 1280 + 20 + 8,
	.vtotal = 1280 + 20 + 8 + 20,
	.vrefresh = 60,
	.width_mm = 62,
	.height_mm = 110,
};

static int tianma_499_v2_get_modes(struct drm_panel *panel)
{
	struct drm_display_mode *mode;

	mode = drm_mode_duplicate(panel->drm, &tianma_499_v2_mode);
	if (!mode)
		return -ENOMEM;

	drm_mode_set_name(mode);

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

	return 1;
}

static const struct drm_panel_funcs tianma_499_v2_panel_funcs = {
	.disable = tianma_499_v2_disable,
	.unprepare = tianma_499_v2_unprepare,
	.prepare = tianma_499_v2_prepare,
	.enable = tianma_499_v2_enable,
	.get_modes = tianma_499_v2_get_modes,
};

static int dsi_dcs_bl_get_brightness(struct backlight_device *bl)
{
	struct mipi_dsi_device *dsi = bl_get_data(bl);
	int ret;
	u16 brightness = bl->props.brightness;

	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;

	ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
	if (ret < 0)
		return ret;

	dsi->mode_flags |= MIPI_DSI_MODE_LPM;

	return brightness;
}

static int dsi_dcs_bl_update_status(struct backlight_device *bl)
{
	struct mipi_dsi_device *dsi = bl_get_data(bl);
	int ret;

	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;

	ret = mipi_dsi_dcs_set_display_brightness(dsi, bl->props.brightness);
	if (ret < 0)
		return ret;

	dsi->mode_flags |= MIPI_DSI_MODE_LPM;

	return 0;
}

static const struct backlight_ops dsi_bl_ops = {
	.update_status = dsi_dcs_bl_update_status,
	.get_brightness = dsi_dcs_bl_get_brightness,
};

static struct backlight_device *
tianma_499_v2_create_backlight(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct backlight_properties props;

	memset(&props, 0, sizeof(props));
	props.type = BACKLIGHT_RAW;
	props.brightness = 4095;
	props.max_brightness = 4095;

	return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
					      &dsi_bl_ops, &props);
}

static int tianma_499_v2_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct tianma_499_v2 *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)) {
		ret = PTR_ERR(ctx->reset_gpio);
		dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
		return ret;
	}

	ctx->backlight = tianma_499_v2_create_backlight(dsi);
	if (IS_ERR(ctx->backlight)) {
		ret = PTR_ERR(ctx->backlight);
		dev_err(dev, "Failed to create backlight: %d\n", ret);
		return ret;
	}

	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_MODE_VIDEO_HSE |
			  MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;

	drm_panel_init(&ctx->panel);
	ctx->panel.dev = dev;
	ctx->panel.funcs = &tianma_499_v2_panel_funcs;

	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 tianma_499_v2_remove(struct mipi_dsi_device *dsi)
{
	struct tianma_499_v2 *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 tianma_499_v2_of_match[] = {
	{ .compatible = "mdss,tianma_499_v2" }, // FIXME
	{ }
};
MODULE_DEVICE_TABLE(of, tianma_499_v2_of_match);

static struct mipi_dsi_driver tianma_499_v2_driver = {
	.probe = tianma_499_v2_probe,
	.remove = tianma_499_v2_remove,
	.driver = {
		.name = "panel-tianma-499-v2",
		.of_match_table = tianma_499_v2_of_match,
	},
};
module_mipi_dsi_driver(tianma_499_v2_driver);

MODULE_AUTHOR("linux-mdss-dsi-panel-driver-generator <fix@me>");
MODULE_DESCRIPTION("DRM driver for mipi_mot_video_tianma_720p_499");
MODULE_LICENSE("GPL v2");