[deliverable/linux.git] / drivers / gpu / drm / panel / panel-simple.c

/*
 * Copyright (C) 2013, NVIDIA Corporation.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include <linux/backlight.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>

#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>

struct panel_desc {
	const struct drm_display_mode *modes;
	unsigned int num_modes;

	struct {
		unsigned int width;
		unsigned int height;
	} size;
};

struct panel_simple {
	struct drm_panel base;
	bool enabled;

	const struct panel_desc *desc;

	struct backlight_device *backlight;
	struct regulator *supply;
	struct i2c_adapter *ddc;

	struct gpio_desc *enable_gpio;
};

static inline struct panel_simple *to_panel_simple(struct drm_panel *panel)
{
	return container_of(panel, struct panel_simple, base);
}

static int panel_simple_get_fixed_modes(struct panel_simple *panel)
{
	struct drm_connector *connector = panel->base.connector;
	struct drm_device *drm = panel->base.drm;
	struct drm_display_mode *mode;
	unsigned int i, num = 0;

	if (!panel->desc)
		return 0;

	for (i = 0; i < panel->desc->num_modes; i++) {
		const struct drm_display_mode *m = &panel->desc->modes[i];

		mode = drm_mode_duplicate(drm, m);
		if (!mode) {
			dev_err(drm->dev, "failed to add mode %ux%u@%u\n",
				m->hdisplay, m->vdisplay, m->vrefresh);
			continue;
		}

		drm_mode_set_name(mode);

		drm_mode_probed_add(connector, mode);
		num++;
	}

	connector->display_info.width_mm = panel->desc->size.width;
	connector->display_info.height_mm = panel->desc->size.height;

	return num;
}

static int panel_simple_disable(struct drm_panel *panel)
{
	struct panel_simple *p = to_panel_simple(panel);

	if (!p->enabled)
		return 0;

	if (p->backlight) {
		p->backlight->props.power = FB_BLANK_POWERDOWN;
		backlight_update_status(p->backlight);
	}

	if (p->enable_gpio)
		gpiod_set_value_cansleep(p->enable_gpio, 0);

	regulator_disable(p->supply);
	p->enabled = false;

	return 0;
}

static int panel_simple_enable(struct drm_panel *panel)
{
	struct panel_simple *p = to_panel_simple(panel);
	int err;

	if (p->enabled)
		return 0;

	err = regulator_enable(p->supply);
	if (err < 0) {
		dev_err(panel->dev, "failed to enable supply: %d\n", err);
		return err;
	}

	if (p->enable_gpio)
		gpiod_set_value_cansleep(p->enable_gpio, 1);

	if (p->backlight) {
		p->backlight->props.power = FB_BLANK_UNBLANK;
		backlight_update_status(p->backlight);
	}

	p->enabled = true;

	return 0;
}

static int panel_simple_get_modes(struct drm_panel *panel)
{
	struct panel_simple *p = to_panel_simple(panel);
	int num = 0;

	/* probe EDID if a DDC bus is available */
	if (p->ddc) {
		struct edid *edid = drm_get_edid(panel->connector, p->ddc);
		drm_mode_connector_update_edid_property(panel->connector, edid);
		if (edid) {
			num += drm_add_edid_modes(panel->connector, edid);
			kfree(edid);
		}
	}

	/* add hard-coded panel modes */
	num += panel_simple_get_fixed_modes(p);

	return num;
}

static const struct drm_panel_funcs panel_simple_funcs = {
	.disable = panel_simple_disable,
	.enable = panel_simple_enable,
	.get_modes = panel_simple_get_modes,
};

static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
{
	struct device_node *backlight, *ddc;
	struct panel_simple *panel;
	int err;

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

	panel->enabled = false;
	panel->desc = desc;

	panel->supply = devm_regulator_get(dev, "power");
	if (IS_ERR(panel->supply))
		return PTR_ERR(panel->supply);

	panel->enable_gpio = devm_gpiod_get(dev, "enable");
	if (IS_ERR(panel->enable_gpio)) {
		err = PTR_ERR(panel->enable_gpio);
		if (err != -ENOENT) {
			dev_err(dev, "failed to request GPIO: %d\n", err);
			return err;
		}

		panel->enable_gpio = NULL;
	} else {
		err = gpiod_direction_output(panel->enable_gpio, 0);
		if (err < 0) {
			dev_err(dev, "failed to setup GPIO: %d\n", err);
			return err;
		}
	}

	backlight = of_parse_phandle(dev->of_node, "backlight", 0);
	if (backlight) {
		panel->backlight = of_find_backlight_by_node(backlight);
		of_node_put(backlight);

		if (!panel->backlight)
			return -EPROBE_DEFER;
	}

	ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
	if (ddc) {
		panel->ddc = of_find_i2c_adapter_by_node(ddc);
		of_node_put(ddc);

		if (!panel->ddc) {
			err = -EPROBE_DEFER;
			goto free_backlight;
		}
	}

	drm_panel_init(&panel->base);
	panel->base.dev = dev;
	panel->base.funcs = &panel_simple_funcs;

	err = drm_panel_add(&panel->base);
	if (err < 0)
		goto free_ddc;

	dev_set_drvdata(dev, panel);

	return 0;

free_ddc:
	if (panel->ddc)
		put_device(&panel->ddc->dev);
free_backlight:
	if (panel->backlight)
		put_device(&panel->backlight->dev);

	return err;
}

static int panel_simple_remove(struct device *dev)
{
	struct panel_simple *panel = dev_get_drvdata(dev);

	drm_panel_detach(&panel->base);
	drm_panel_remove(&panel->base);

	panel_simple_disable(&panel->base);

	if (panel->ddc)
		put_device(&panel->ddc->dev);

	if (panel->backlight)
		put_device(&panel->backlight->dev);

	return 0;
}

static void panel_simple_shutdown(struct device *dev)
{
	struct panel_simple *panel = dev_get_drvdata(dev);

	panel_simple_disable(&panel->base);
}

static const struct drm_display_mode auo_b101aw03_mode = {
	.clock = 51450,
	.hdisplay = 1024,
	.hsync_start = 1024 + 156,
	.hsync_end = 1024 + 156 + 8,
	.htotal = 1024 + 156 + 8 + 156,
	.vdisplay = 600,
	.vsync_start = 600 + 16,
	.vsync_end = 600 + 16 + 6,
	.vtotal = 600 + 16 + 6 + 16,
	.vrefresh = 60,
};

static const struct panel_desc auo_b101aw03 = {
	.modes = &auo_b101aw03_mode,
	.num_modes = 1,
	.size = {
		.width = 223,
		.height = 125,
	},
};

static const struct drm_display_mode auo_b133xtn01_mode = {
	.clock = 69500,
	.hdisplay = 1366,
	.hsync_start = 1366 + 48,
	.hsync_end = 1366 + 48 + 32,
	.htotal = 1366 + 48 + 32 + 20,
	.vdisplay = 768,
	.vsync_start = 768 + 3,
	.vsync_end = 768 + 3 + 6,
	.vtotal = 768 + 3 + 6 + 13,
	.vrefresh = 60,
};

static const struct panel_desc auo_b133xtn01 = {
	.modes = &auo_b133xtn01_mode,
	.num_modes = 1,
	.size = {
		.width = 293,
		.height = 165,
	},
};

static const struct drm_display_mode chunghwa_claa101wa01a_mode = {
	.clock = 72070,
	.hdisplay = 1366,
	.hsync_start = 1366 + 58,
	.hsync_end = 1366 + 58 + 58,
	.htotal = 1366 + 58 + 58 + 58,
	.vdisplay = 768,
	.vsync_start = 768 + 4,
	.vsync_end = 768 + 4 + 4,
	.vtotal = 768 + 4 + 4 + 4,
	.vrefresh = 60,
};

static const struct panel_desc chunghwa_claa101wa01a = {
	.modes = &chunghwa_claa101wa01a_mode,
	.num_modes = 1,
	.size = {
		.width = 220,
		.height = 120,
	},
};

static const struct drm_display_mode chunghwa_claa101wb01_mode = {
	.clock = 69300,
	.hdisplay = 1366,
	.hsync_start = 1366 + 48,
	.hsync_end = 1366 + 48 + 32,
	.htotal = 1366 + 48 + 32 + 20,
	.vdisplay = 768,
	.vsync_start = 768 + 16,
	.vsync_end = 768 + 16 + 8,
	.vtotal = 768 + 16 + 8 + 16,
	.vrefresh = 60,
};

static const struct panel_desc chunghwa_claa101wb01 = {
	.modes = &chunghwa_claa101wb01_mode,
	.num_modes = 1,
	.size = {
		.width = 223,
		.height = 125,
	},
};

static const struct drm_display_mode edt_et057090dhu_mode = {
	.clock = 25175,
	.hdisplay = 640,
	.hsync_start = 640 + 16,
	.hsync_end = 640 + 16 + 30,
	.htotal = 640 + 16 + 30 + 114,
	.vdisplay = 480,
	.vsync_start = 480 + 10,
	.vsync_end = 480 + 10 + 3,
	.vtotal = 480 + 10 + 3 + 32,
	.vrefresh = 60,
	.flags = DRM_MODE_FLAG_NVSYNC | DRM_MODE_FLAG_NHSYNC,
};

static const struct panel_desc edt_et057090dhu = {
	.modes = &edt_et057090dhu_mode,
	.num_modes = 1,
	.size = {
		.width = 115,
		.height = 86,
	},
};

static const struct drm_display_mode edt_etm0700g0dh6_mode = {
	.clock = 33260,
	.hdisplay = 800,
	.hsync_start = 800 + 40,
	.hsync_end = 800 + 40 + 128,
	.htotal = 800 + 40 + 128 + 88,
	.vdisplay = 480,
	.vsync_start = 480 + 10,
	.vsync_end = 480 + 10 + 2,
	.vtotal = 480 + 10 + 2 + 33,
	.vrefresh = 60,
	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
};

static const struct panel_desc edt_etm0700g0dh6 = {
	.modes = &edt_etm0700g0dh6_mode,
	.num_modes = 1,
	.size = {
		.width = 152,
		.height = 91,
	},
};

static const struct drm_display_mode foxlink_fl500wvr00_a0t_mode = {
	.clock = 32260,
	.hdisplay = 800,
	.hsync_start = 800 + 168,
	.hsync_end = 800 + 168 + 64,
	.htotal = 800 + 168 + 64 + 88,
	.vdisplay = 480,
	.vsync_start = 480 + 37,
	.vsync_end = 480 + 37 + 2,
	.vtotal = 480 + 37 + 2 + 8,
	.vrefresh = 60,
};

static const struct panel_desc foxlink_fl500wvr00_a0t = {
	.modes = &foxlink_fl500wvr00_a0t_mode,
	.num_modes = 1,
	.size = {
		.width = 108,
		.height = 65,
	},
};

static const struct drm_display_mode lg_lp129qe_mode = {
	.clock = 285250,
	.hdisplay = 2560,
	.hsync_start = 2560 + 48,
	.hsync_end = 2560 + 48 + 32,
	.htotal = 2560 + 48 + 32 + 80,
	.vdisplay = 1700,
	.vsync_start = 1700 + 3,
	.vsync_end = 1700 + 3 + 10,
	.vtotal = 1700 + 3 + 10 + 36,
	.vrefresh = 60,
};

static const struct panel_desc lg_lp129qe = {
	.modes = &lg_lp129qe_mode,
	.num_modes = 1,
	.size = {
		.width = 272,
		.height = 181,
	},
};

static const struct drm_display_mode samsung_ltn101nt05_mode = {
	.clock = 54030,
	.hdisplay = 1024,
	.hsync_start = 1024 + 24,
	.hsync_end = 1024 + 24 + 136,
	.htotal = 1024 + 24 + 136 + 160,
	.vdisplay = 600,
	.vsync_start = 600 + 3,
	.vsync_end = 600 + 3 + 6,
	.vtotal = 600 + 3 + 6 + 61,
	.vrefresh = 60,
};

static const struct panel_desc samsung_ltn101nt05 = {
	.modes = &samsung_ltn101nt05_mode,
	.num_modes = 1,
	.size = {
		.width = 1024,
		.height = 600,
	},
};

static const struct of_device_id platform_of_match[] = {
	{
		.compatible = "auo,b101aw03",
		.data = &auo_b101aw03,
	}, {
		.compatible = "auo,b133xtn01",
		.data = &auo_b133xtn01,
	}, {
		.compatible = "chunghwa,claa101wa01a",
		.data = &chunghwa_claa101wa01a
	}, {
		.compatible = "chunghwa,claa101wb01",
		.data = &chunghwa_claa101wb01
	}, {
		.compatible = "edt,et057090dhu",
		.data = &edt_et057090dhu,
	}, {
		.compatible = "edt,et070080dh6",
		.data = &edt_etm0700g0dh6,
	}, {
		.compatible = "edt,etm0700g0dh6",
		.data = &edt_etm0700g0dh6,
	}, {
		.compatible = "foxlink,fl500wvr00-a0t",
		.data = &foxlink_fl500wvr00_a0t,
	}, {
		.compatible = "lg,lp129qe",
		.data = &lg_lp129qe,
	}, {
		.compatible = "samsung,ltn101nt05",
		.data = &samsung_ltn101nt05,
	}, {
		.compatible = "simple-panel",
	}, {
		/* sentinel */
	}
};
MODULE_DEVICE_TABLE(of, platform_of_match);

static int panel_simple_platform_probe(struct platform_device *pdev)
{
	const struct of_device_id *id;

	id = of_match_node(platform_of_match, pdev->dev.of_node);
	if (!id)
		return -ENODEV;

	return panel_simple_probe(&pdev->dev, id->data);
}

static int panel_simple_platform_remove(struct platform_device *pdev)
{
	return panel_simple_remove(&pdev->dev);
}

static void panel_simple_platform_shutdown(struct platform_device *pdev)
{
	panel_simple_shutdown(&pdev->dev);
}

static struct platform_driver panel_simple_platform_driver = {
	.driver = {
		.name = "panel-simple",
		.owner = THIS_MODULE,
		.of_match_table = platform_of_match,
	},
	.probe = panel_simple_platform_probe,
	.remove = panel_simple_platform_remove,
	.shutdown = panel_simple_platform_shutdown,
};

struct panel_desc_dsi {
	struct panel_desc desc;

	unsigned long flags;
	enum mipi_dsi_pixel_format format;
	unsigned int lanes;
};

static const struct drm_display_mode lg_ld070wx3_sl01_mode = {
	.clock = 71000,
	.hdisplay = 800,
	.hsync_start = 800 + 32,
	.hsync_end = 800 + 32 + 1,
	.htotal = 800 + 32 + 1 + 57,
	.vdisplay = 1280,
	.vsync_start = 1280 + 28,
	.vsync_end = 1280 + 28 + 1,
	.vtotal = 1280 + 28 + 1 + 14,
	.vrefresh = 60,
};

static const struct panel_desc_dsi lg_ld070wx3_sl01 = {
	.desc = {
		.modes = &lg_ld070wx3_sl01_mode,
		.num_modes = 1,
		.size = {
			.width = 94,
			.height = 151,
		},
	},
	.flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_CLOCK_NON_CONTINUOUS,
	.format = MIPI_DSI_FMT_RGB888,
	.lanes = 4,
};

static const struct drm_display_mode lg_lh500wx1_sd03_mode = {
	.clock = 67000,
	.hdisplay = 720,
	.hsync_start = 720 + 12,
	.hsync_end = 720 + 12 + 4,
	.htotal = 720 + 12 + 4 + 112,
	.vdisplay = 1280,
	.vsync_start = 1280 + 8,
	.vsync_end = 1280 + 8 + 4,
	.vtotal = 1280 + 8 + 4 + 12,
	.vrefresh = 60,
};

static const struct panel_desc_dsi lg_lh500wx1_sd03 = {
	.desc = {
		.modes = &lg_lh500wx1_sd03_mode,
		.num_modes = 1,
		.size = {
			.width = 62,
			.height = 110,
		},
	},
	.flags = MIPI_DSI_MODE_VIDEO,
	.format = MIPI_DSI_FMT_RGB888,
	.lanes = 4,
};

static const struct drm_display_mode panasonic_vvx10f004b00_mode = {
	.clock = 157200,
	.hdisplay = 1920,
	.hsync_start = 1920 + 154,
	.hsync_end = 1920 + 154 + 16,
	.htotal = 1920 + 154 + 16 + 32,
	.vdisplay = 1200,
	.vsync_start = 1200 + 17,
	.vsync_end = 1200 + 17 + 2,
	.vtotal = 1200 + 17 + 2 + 16,
	.vrefresh = 60,
};

static const struct panel_desc_dsi panasonic_vvx10f004b00 = {
	.desc = {
		.modes = &panasonic_vvx10f004b00_mode,
		.num_modes = 1,
		.size = {
			.width = 217,
			.height = 136,
		},
	},
	.flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
		 MIPI_DSI_CLOCK_NON_CONTINUOUS,
	.format = MIPI_DSI_FMT_RGB888,
	.lanes = 4,
};

static const struct of_device_id dsi_of_match[] = {
	{
		.compatible = "lg,ld070wx3-sl01",
		.data = &lg_ld070wx3_sl01
	}, {
		.compatible = "lg,lh500wx1-sd03",
		.data = &lg_lh500wx1_sd03
	}, {
		.compatible = "panasonic,vvx10f004b00",
		.data = &panasonic_vvx10f004b00
	}, {
		/* sentinel */
	}
};
MODULE_DEVICE_TABLE(of, dsi_of_match);

static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
{
	const struct panel_desc_dsi *desc;
	const struct of_device_id *id;
	int err;

	id = of_match_node(dsi_of_match, dsi->dev.of_node);
	if (!id)
		return -ENODEV;

	desc = id->data;

	err = panel_simple_probe(&dsi->dev, &desc->desc);
	if (err < 0)
		return err;

	dsi->mode_flags = desc->flags;
	dsi->format = desc->format;
	dsi->lanes = desc->lanes;

	return mipi_dsi_attach(dsi);
}

static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi)
{
	int err;

	err = mipi_dsi_detach(dsi);
	if (err < 0)
		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);

	return panel_simple_remove(&dsi->dev);
}

static void panel_simple_dsi_shutdown(struct mipi_dsi_device *dsi)
{
	panel_simple_shutdown(&dsi->dev);
}

static struct mipi_dsi_driver panel_simple_dsi_driver = {
	.driver = {
		.name = "panel-simple-dsi",
		.owner = THIS_MODULE,
		.of_match_table = dsi_of_match,
	},
	.probe = panel_simple_dsi_probe,
	.remove = panel_simple_dsi_remove,
	.shutdown = panel_simple_dsi_shutdown,
};

static int __init panel_simple_init(void)
{
	int err;

	err = platform_driver_register(&panel_simple_platform_driver);
	if (err < 0)
		return err;

	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
		err = mipi_dsi_driver_register(&panel_simple_dsi_driver);
		if (err < 0)
			return err;
	}

	return 0;
}
module_init(panel_simple_init);

static void __exit panel_simple_exit(void)
{
	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
		mipi_dsi_driver_unregister(&panel_simple_dsi_driver);

	platform_driver_unregister(&panel_simple_platform_driver);
}
module_exit(panel_simple_exit);

MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
MODULE_DESCRIPTION("DRM Driver for Simple Panels");
MODULE_LICENSE("GPL and additional rights");
Commit	Line	Data
280921de TR	1	/*
	2	* Copyright (C) 2013, NVIDIA Corporation. All rights reserved.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sub license,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice (including the
	12	* next paragraph) shall be included in all copies or substantial portions
	13	* of the Software.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	16	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	18	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	19	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	20	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	21	* DEALINGS IN THE SOFTWARE.
	22	*/
	23
	24	#include <linux/backlight.h>
cfdf0549	25	#include <linux/gpio/consumer.h>
280921de	26	#include <linux/module.h>
280921de TR	27	#include <linux/of_platform.h>
	28	#include <linux/platform_device.h>
	29	#include <linux/regulator/consumer.h>
	30
	31	#include <drm/drmP.h>
	32	#include <drm/drm_crtc.h>
210fcd9d	33	#include <drm/drm_mipi_dsi.h>
280921de TR	34	#include <drm/drm_panel.h>
	35
	36	struct panel_desc {
	37	const struct drm_display_mode *modes;
	38	unsigned int num_modes;
	39
	40	struct {
	41	unsigned int width;
	42	unsigned int height;
	43	} size;
	44	};
	45
280921de TR	46	struct panel_simple {
	47	struct drm_panel base;
	48	bool enabled;
	49
	50	const struct panel_desc *desc;
	51
	52	struct backlight_device *backlight;
	53	struct regulator *supply;
	54	struct i2c_adapter *ddc;
	55
cfdf0549	56	struct gpio_desc *enable_gpio;
280921de TR	57	};
	58
	59	static inline struct panel_simple to_panel_simple(struct drm_panel panel)
	60	{
	61	return container_of(panel, struct panel_simple, base);
	62	}
	63
	64	static int panel_simple_get_fixed_modes(struct panel_simple *panel)
	65	{
	66	struct drm_connector *connector = panel->base.connector;
	67	struct drm_device *drm = panel->base.drm;
	68	struct drm_display_mode *mode;
	69	unsigned int i, num = 0;
	70
	71	if (!panel->desc)
	72	return 0;
	73
	74	for (i = 0; i < panel->desc->num_modes; i++) {
	75	const struct drm_display_mode *m = &panel->desc->modes[i];
	76
	77	mode = drm_mode_duplicate(drm, m);
	78	if (!mode) {
	79	dev_err(drm->dev, "failed to add mode %ux%u@%u\n",
	80	m->hdisplay, m->vdisplay, m->vrefresh);
	81	continue;
	82	}
	83
	84	drm_mode_set_name(mode);
	85
	86	drm_mode_probed_add(connector, mode);
	87	num++;
	88	}
	89
	90	connector->display_info.width_mm = panel->desc->size.width;
	91	connector->display_info.height_mm = panel->desc->size.height;
	92
	93	return num;
	94	}
	95
	96	static int panel_simple_disable(struct drm_panel *panel)
	97	{
	98	struct panel_simple *p = to_panel_simple(panel);
	99
	100	if (!p->enabled)
	101	return 0;
	102
	103	if (p->backlight) {
	104	p->backlight->props.power = FB_BLANK_POWERDOWN;
	105	backlight_update_status(p->backlight);
	106	}
	107
cfdf0549	108	if (p->enable_gpio)
15c1a919	109	gpiod_set_value_cansleep(p->enable_gpio, 0);
280921de TR	110
	111	regulator_disable(p->supply);
	112	p->enabled = false;
	113
	114	return 0;
	115	}
	116
	117	static int panel_simple_enable(struct drm_panel *panel)
	118	{
	119	struct panel_simple *p = to_panel_simple(panel);
	120	int err;
	121
	122	if (p->enabled)
	123	return 0;
	124
	125	err = regulator_enable(p->supply);
	126	if (err < 0) {
	127	dev_err(panel->dev, "failed to enable supply: %d\n", err);
	128	return err;
	129	}
	130
cfdf0549	131	if (p->enable_gpio)
15c1a919	132	gpiod_set_value_cansleep(p->enable_gpio, 1);
280921de TR	133
	134	if (p->backlight) {
	135	p->backlight->props.power = FB_BLANK_UNBLANK;
	136	backlight_update_status(p->backlight);
	137	}
	138
	139	p->enabled = true;
	140
	141	return 0;
	142	}
	143
	144	static int panel_simple_get_modes(struct drm_panel *panel)
	145	{
	146	struct panel_simple *p = to_panel_simple(panel);
	147	int num = 0;
	148
	149	/* probe EDID if a DDC bus is available */
	150	if (p->ddc) {
	151	struct edid *edid = drm_get_edid(panel->connector, p->ddc);
70bf6878	152	drm_mode_connector_update_edid_property(panel->connector, edid);
280921de TR	153	if (edid) {
	154	num += drm_add_edid_modes(panel->connector, edid);
	155	kfree(edid);
	156	}
	157	}
	158
	159	/* add hard-coded panel modes */
	160	num += panel_simple_get_fixed_modes(p);
	161
	162	return num;
	163	}
	164
	165	static const struct drm_panel_funcs panel_simple_funcs = {
	166	.disable = panel_simple_disable,
	167	.enable = panel_simple_enable,
	168	.get_modes = panel_simple_get_modes,
	169	};
	170
	171	static int panel_simple_probe(struct device dev, const struct panel_desc desc)
	172	{
	173	struct device_node backlight, ddc;
	174	struct panel_simple *panel;
280921de TR	175	int err;
	176
	177	panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
	178	if (!panel)
	179	return -ENOMEM;
	180
	181	panel->enabled = false;
	182	panel->desc = desc;
	183
	184	panel->supply = devm_regulator_get(dev, "power");
	185	if (IS_ERR(panel->supply))
	186	return PTR_ERR(panel->supply);
	187
cfdf0549 AC	188	panel->enable_gpio = devm_gpiod_get(dev, "enable");
	189	if (IS_ERR(panel->enable_gpio)) {
	190	err = PTR_ERR(panel->enable_gpio);
	191	if (err != -ENOENT) {
	192	dev_err(dev, "failed to request GPIO: %d\n", err);
280921de TR	193	return err;
	194	}
	195
cfdf0549 AC	196	panel->enable_gpio = NULL;
	197	} else {
	198	err = gpiod_direction_output(panel->enable_gpio, 0);
280921de	199	if (err < 0) {
cfdf0549 AC	200	dev_err(dev, "failed to setup GPIO: %d\n", err);
cfdf0549 AC	201	return err;
280921de TR	202	}
	203	}
	204
	205	backlight = of_parse_phandle(dev->of_node, "backlight", 0);
	206	if (backlight) {
	207	panel->backlight = of_find_backlight_by_node(backlight);
	208	of_node_put(backlight);
	209
cfdf0549 AC	210	if (!panel->backlight)
cfdf0549 AC	211	return -EPROBE_DEFER;
280921de TR	212	}
	213
	214	ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0);
	215	if (ddc) {
	216	panel->ddc = of_find_i2c_adapter_by_node(ddc);
	217	of_node_put(ddc);
	218
	219	if (!panel->ddc) {
	220	err = -EPROBE_DEFER;
	221	goto free_backlight;
	222	}
	223	}
	224
	225	drm_panel_init(&panel->base);
	226	panel->base.dev = dev;
	227	panel->base.funcs = &panel_simple_funcs;
	228
	229	err = drm_panel_add(&panel->base);
	230	if (err < 0)
	231	goto free_ddc;
	232
	233	dev_set_drvdata(dev, panel);
	234
	235	return 0;
	236
	237	free_ddc:
	238	if (panel->ddc)
	239	put_device(&panel->ddc->dev);
	240	free_backlight:
	241	if (panel->backlight)
	242	put_device(&panel->backlight->dev);
280921de TR	243
	244	return err;
	245	}
	246
	247	static int panel_simple_remove(struct device *dev)
	248	{
	249	struct panel_simple *panel = dev_get_drvdata(dev);
	250
	251	drm_panel_detach(&panel->base);
	252	drm_panel_remove(&panel->base);
	253
	254	panel_simple_disable(&panel->base);
	255
	256	if (panel->ddc)
	257	put_device(&panel->ddc->dev);
	258
	259	if (panel->backlight)
	260	put_device(&panel->backlight->dev);
	261
280921de TR	262	return 0;
	263	}
	264
d02fd93e TR	265	static void panel_simple_shutdown(struct device *dev)
	266	{
	267	struct panel_simple *panel = dev_get_drvdata(dev);
	268
	269	panel_simple_disable(&panel->base);
	270	}
	271
280921de TR	272	static const struct drm_display_mode auo_b101aw03_mode = {
	273	.clock = 51450,
	274	.hdisplay = 1024,
	275	.hsync_start = 1024 + 156,
	276	.hsync_end = 1024 + 156 + 8,
	277	.htotal = 1024 + 156 + 8 + 156,
	278	.vdisplay = 600,
	279	.vsync_start = 600 + 16,
	280	.vsync_end = 600 + 16 + 6,
	281	.vtotal = 600 + 16 + 6 + 16,
	282	.vrefresh = 60,
	283	};
	284
	285	static const struct panel_desc auo_b101aw03 = {
	286	.modes = &auo_b101aw03_mode,
	287	.num_modes = 1,
	288	.size = {
	289	.width = 223,
	290	.height = 125,
	291	},
	292	};
	293
a333f7ad SM	294	static const struct drm_display_mode auo_b133xtn01_mode = {
	295	.clock = 69500,
	296	.hdisplay = 1366,
	297	.hsync_start = 1366 + 48,
	298	.hsync_end = 1366 + 48 + 32,
	299	.htotal = 1366 + 48 + 32 + 20,
	300	.vdisplay = 768,
	301	.vsync_start = 768 + 3,
	302	.vsync_end = 768 + 3 + 6,
	303	.vtotal = 768 + 3 + 6 + 13,
	304	.vrefresh = 60,
	305	};
	306
	307	static const struct panel_desc auo_b133xtn01 = {
	308	.modes = &auo_b133xtn01_mode,
	309	.num_modes = 1,
	310	.size = {
	311	.width = 293,
	312	.height = 165,
	313	},
	314	};
	315
4c930757 SW	316	static const struct drm_display_mode chunghwa_claa101wa01a_mode = {
	317	.clock = 72070,
	318	.hdisplay = 1366,
	319	.hsync_start = 1366 + 58,
	320	.hsync_end = 1366 + 58 + 58,
	321	.htotal = 1366 + 58 + 58 + 58,
	322	.vdisplay = 768,
	323	.vsync_start = 768 + 4,
	324	.vsync_end = 768 + 4 + 4,
	325	.vtotal = 768 + 4 + 4 + 4,
	326	.vrefresh = 60,
	327	};
	328
	329	static const struct panel_desc chunghwa_claa101wa01a = {
	330	.modes = &chunghwa_claa101wa01a_mode,
	331	.num_modes = 1,
	332	.size = {
	333	.width = 220,
	334	.height = 120,
	335	},
	336	};
	337
280921de TR	338	static const struct drm_display_mode chunghwa_claa101wb01_mode = {
	339	.clock = 69300,
	340	.hdisplay = 1366,
	341	.hsync_start = 1366 + 48,
	342	.hsync_end = 1366 + 48 + 32,
	343	.htotal = 1366 + 48 + 32 + 20,
	344	.vdisplay = 768,
	345	.vsync_start = 768 + 16,
	346	.vsync_end = 768 + 16 + 8,
	347	.vtotal = 768 + 16 + 8 + 16,
	348	.vrefresh = 60,
	349	};
	350
	351	static const struct panel_desc chunghwa_claa101wb01 = {
	352	.modes = &chunghwa_claa101wb01_mode,
	353	.num_modes = 1,
	354	.size = {
	355	.width = 223,
	356	.height = 125,
	357	},
	358	};
	359
26ab0065 SA	360	static const struct drm_display_mode edt_et057090dhu_mode = {
	361	.clock = 25175,
	362	.hdisplay = 640,
	363	.hsync_start = 640 + 16,
	364	.hsync_end = 640 + 16 + 30,
	365	.htotal = 640 + 16 + 30 + 114,
	366	.vdisplay = 480,
	367	.vsync_start = 480 + 10,
	368	.vsync_end = 480 + 10 + 3,
	369	.vtotal = 480 + 10 + 3 + 32,
	370	.vrefresh = 60,
	371	.flags = DRM_MODE_FLAG_NVSYNC \| DRM_MODE_FLAG_NHSYNC,
	372	};
	373
	374	static const struct panel_desc edt_et057090dhu = {
	375	.modes = &edt_et057090dhu_mode,
	376	.num_modes = 1,
	377	.size = {
	378	.width = 115,
	379	.height = 86,
	380	},
	381	};
	382
fff5de45 PZ	383	static const struct drm_display_mode edt_etm0700g0dh6_mode = {
	384	.clock = 33260,
	385	.hdisplay = 800,
	386	.hsync_start = 800 + 40,
	387	.hsync_end = 800 + 40 + 128,
	388	.htotal = 800 + 40 + 128 + 88,
	389	.vdisplay = 480,
	390	.vsync_start = 480 + 10,
	391	.vsync_end = 480 + 10 + 2,
	392	.vtotal = 480 + 10 + 2 + 33,
	393	.vrefresh = 60,
	394	.flags = DRM_MODE_FLAG_NHSYNC \| DRM_MODE_FLAG_NVSYNC,
	395	};
	396
	397	static const struct panel_desc edt_etm0700g0dh6 = {
	398	.modes = &edt_etm0700g0dh6_mode,
	399	.num_modes = 1,
	400	.size = {
	401	.width = 152,
	402	.height = 91,
	403	},
	404	};
	405
102932b0 BB	406	static const struct drm_display_mode foxlink_fl500wvr00_a0t_mode = {
	407	.clock = 32260,
	408	.hdisplay = 800,
	409	.hsync_start = 800 + 168,
	410	.hsync_end = 800 + 168 + 64,
	411	.htotal = 800 + 168 + 64 + 88,
	412	.vdisplay = 480,
	413	.vsync_start = 480 + 37,
	414	.vsync_end = 480 + 37 + 2,
	415	.vtotal = 480 + 37 + 2 + 8,
	416	.vrefresh = 60,
	417	};
	418
	419	static const struct panel_desc foxlink_fl500wvr00_a0t = {
	420	.modes = &foxlink_fl500wvr00_a0t_mode,
	421	.num_modes = 1,
	422	.size = {
	423	.width = 108,
	424	.height = 65,
	425	},
	426	};
	427
ec7c5653 TR	428	static const struct drm_display_mode lg_lp129qe_mode = {
	429	.clock = 285250,
	430	.hdisplay = 2560,
	431	.hsync_start = 2560 + 48,
	432	.hsync_end = 2560 + 48 + 32,
	433	.htotal = 2560 + 48 + 32 + 80,
	434	.vdisplay = 1700,
	435	.vsync_start = 1700 + 3,
	436	.vsync_end = 1700 + 3 + 10,
	437	.vtotal = 1700 + 3 + 10 + 36,
	438	.vrefresh = 60,
	439	};
	440
	441	static const struct panel_desc lg_lp129qe = {
	442	.modes = &lg_lp129qe_mode,
	443	.num_modes = 1,
	444	.size = {
	445	.width = 272,
	446	.height = 181,
	447	},
	448	};
	449
6d54e3d2 MD	450	static const struct drm_display_mode samsung_ltn101nt05_mode = {
	451	.clock = 54030,
	452	.hdisplay = 1024,
	453	.hsync_start = 1024 + 24,
	454	.hsync_end = 1024 + 24 + 136,
	455	.htotal = 1024 + 24 + 136 + 160,
	456	.vdisplay = 600,
	457	.vsync_start = 600 + 3,
	458	.vsync_end = 600 + 3 + 6,
	459	.vtotal = 600 + 3 + 6 + 61,
	460	.vrefresh = 60,
	461	};
	462
	463	static const struct panel_desc samsung_ltn101nt05 = {
	464	.modes = &samsung_ltn101nt05_mode,
	465	.num_modes = 1,
	466	.size = {
	467	.width = 1024,
	468	.height = 600,
	469	},
	470	};
	471
280921de TR	472	static const struct of_device_id platform_of_match[] = {
	473	{
	474	.compatible = "auo,b101aw03",
	475	.data = &auo_b101aw03,
a333f7ad SM	476	}, {
	477	.compatible = "auo,b133xtn01",
	478	.data = &auo_b133xtn01,
4c930757 SW	479	}, {
	480	.compatible = "chunghwa,claa101wa01a",
	481	.data = &chunghwa_claa101wa01a
280921de TR	482	}, {
	483	.compatible = "chunghwa,claa101wb01",
	484	.data = &chunghwa_claa101wb01
26ab0065 SA	485	}, {
	486	.compatible = "edt,et057090dhu",
	487	.data = &edt_et057090dhu,
fff5de45 PZ	488	}, {
	489	.compatible = "edt,et070080dh6",
	490	.data = &edt_etm0700g0dh6,
	491	}, {
	492	.compatible = "edt,etm0700g0dh6",
	493	.data = &edt_etm0700g0dh6,
102932b0 BB	494	}, {
	495	.compatible = "foxlink,fl500wvr00-a0t",
	496	.data = &foxlink_fl500wvr00_a0t,
ec7c5653 TR	497	}, {
	498	.compatible = "lg,lp129qe",
	499	.data = &lg_lp129qe,
6d54e3d2 MD	500	}, {
	501	.compatible = "samsung,ltn101nt05",
	502	.data = &samsung_ltn101nt05,
280921de TR	503	}, {
	504	.compatible = "simple-panel",
	505	}, {
	506	/* sentinel */
	507	}
	508	};
	509	MODULE_DEVICE_TABLE(of, platform_of_match);
	510
	511	static int panel_simple_platform_probe(struct platform_device *pdev)
	512	{
	513	const struct of_device_id *id;
	514
	515	id = of_match_node(platform_of_match, pdev->dev.of_node);
	516	if (!id)
	517	return -ENODEV;
	518
	519	return panel_simple_probe(&pdev->dev, id->data);
	520	}
	521
	522	static int panel_simple_platform_remove(struct platform_device *pdev)
	523	{
	524	return panel_simple_remove(&pdev->dev);
	525	}
	526
d02fd93e TR	527	static void panel_simple_platform_shutdown(struct platform_device *pdev)
	528	{
	529	panel_simple_shutdown(&pdev->dev);
	530	}
	531
280921de TR	532	static struct platform_driver panel_simple_platform_driver = {
	533	.driver = {
	534	.name = "panel-simple",
	535	.owner = THIS_MODULE,
	536	.of_match_table = platform_of_match,
	537	},
	538	.probe = panel_simple_platform_probe,
	539	.remove = panel_simple_platform_remove,
d02fd93e	540	.shutdown = panel_simple_platform_shutdown,
280921de TR	541	};
280921de TR	542
210fcd9d TR	543	struct panel_desc_dsi {
	544	struct panel_desc desc;
	545
462658b8	546	unsigned long flags;
210fcd9d TR	547	enum mipi_dsi_pixel_format format;
	548	unsigned int lanes;
	549	};
	550
712ac1ba AC	551	static const struct drm_display_mode lg_ld070wx3_sl01_mode = {
	552	.clock = 71000,
	553	.hdisplay = 800,
	554	.hsync_start = 800 + 32,
	555	.hsync_end = 800 + 32 + 1,
	556	.htotal = 800 + 32 + 1 + 57,
	557	.vdisplay = 1280,
	558	.vsync_start = 1280 + 28,
	559	.vsync_end = 1280 + 28 + 1,
	560	.vtotal = 1280 + 28 + 1 + 14,
	561	.vrefresh = 60,
	562	};
	563
	564	static const struct panel_desc_dsi lg_ld070wx3_sl01 = {
	565	.desc = {
	566	.modes = &lg_ld070wx3_sl01_mode,
	567	.num_modes = 1,
	568	.size = {
	569	.width = 94,
	570	.height = 151,
	571	},
	572	},
5e4cc278	573	.flags = MIPI_DSI_MODE_VIDEO \| MIPI_DSI_CLOCK_NON_CONTINUOUS,
712ac1ba AC	574	.format = MIPI_DSI_FMT_RGB888,
	575	.lanes = 4,
	576	};
	577
499ce85a AC	578	static const struct drm_display_mode lg_lh500wx1_sd03_mode = {
	579	.clock = 67000,
	580	.hdisplay = 720,
	581	.hsync_start = 720 + 12,
	582	.hsync_end = 720 + 12 + 4,
	583	.htotal = 720 + 12 + 4 + 112,
	584	.vdisplay = 1280,
	585	.vsync_start = 1280 + 8,
	586	.vsync_end = 1280 + 8 + 4,
	587	.vtotal = 1280 + 8 + 4 + 12,
	588	.vrefresh = 60,
	589	};
	590
	591	static const struct panel_desc_dsi lg_lh500wx1_sd03 = {
	592	.desc = {
	593	.modes = &lg_lh500wx1_sd03_mode,
	594	.num_modes = 1,
	595	.size = {
	596	.width = 62,
	597	.height = 110,
	598	},
	599	},
	600	.flags = MIPI_DSI_MODE_VIDEO,
	601	.format = MIPI_DSI_FMT_RGB888,
	602	.lanes = 4,
	603	};
	604
280921de TR	605	static const struct drm_display_mode panasonic_vvx10f004b00_mode = {
	606	.clock = 157200,
	607	.hdisplay = 1920,
	608	.hsync_start = 1920 + 154,
	609	.hsync_end = 1920 + 154 + 16,
	610	.htotal = 1920 + 154 + 16 + 32,
	611	.vdisplay = 1200,
	612	.vsync_start = 1200 + 17,
	613	.vsync_end = 1200 + 17 + 2,
	614	.vtotal = 1200 + 17 + 2 + 16,
	615	.vrefresh = 60,
	616	};
	617
210fcd9d TR	618	static const struct panel_desc_dsi panasonic_vvx10f004b00 = {
	619	.desc = {
	620	.modes = &panasonic_vvx10f004b00_mode,
	621	.num_modes = 1,
	622	.size = {
	623	.width = 217,
	624	.height = 136,
	625	},
280921de	626	},
5e4cc278 AC	627	.flags = MIPI_DSI_MODE_VIDEO \| MIPI_DSI_MODE_VIDEO_SYNC_PULSE \|
5e4cc278 AC	628	MIPI_DSI_CLOCK_NON_CONTINUOUS,
210fcd9d TR	629	.format = MIPI_DSI_FMT_RGB888,
	630	.lanes = 4,
	631	};
	632
	633	static const struct of_device_id dsi_of_match[] = {
	634	{
712ac1ba AC	635	.compatible = "lg,ld070wx3-sl01",
	636	.data = &lg_ld070wx3_sl01
	637	}, {
499ce85a AC	638	.compatible = "lg,lh500wx1-sd03",
	639	.data = &lg_lh500wx1_sd03
	640	}, {
210fcd9d TR	641	.compatible = "panasonic,vvx10f004b00",
	642	.data = &panasonic_vvx10f004b00
	643	}, {
	644	/* sentinel */
	645	}
	646	};
	647	MODULE_DEVICE_TABLE(of, dsi_of_match);
	648
	649	static int panel_simple_dsi_probe(struct mipi_dsi_device *dsi)
	650	{
	651	const struct panel_desc_dsi *desc;
	652	const struct of_device_id *id;
	653	int err;
	654
	655	id = of_match_node(dsi_of_match, dsi->dev.of_node);
	656	if (!id)
	657	return -ENODEV;
	658
	659	desc = id->data;
	660
	661	err = panel_simple_probe(&dsi->dev, &desc->desc);
	662	if (err < 0)
	663	return err;
	664
462658b8	665	dsi->mode_flags = desc->flags;
210fcd9d TR	666	dsi->format = desc->format;
	667	dsi->lanes = desc->lanes;
	668
	669	return mipi_dsi_attach(dsi);
	670	}
	671
	672	static int panel_simple_dsi_remove(struct mipi_dsi_device *dsi)
	673	{
	674	int err;
	675
	676	err = mipi_dsi_detach(dsi);
	677	if (err < 0)
	678	dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
	679
	680	return panel_simple_remove(&dsi->dev);
	681	}
	682
d02fd93e TR	683	static void panel_simple_dsi_shutdown(struct mipi_dsi_device *dsi)
	684	{
	685	panel_simple_shutdown(&dsi->dev);
	686	}
	687
210fcd9d TR	688	static struct mipi_dsi_driver panel_simple_dsi_driver = {
	689	.driver = {
	690	.name = "panel-simple-dsi",
	691	.owner = THIS_MODULE,
	692	.of_match_table = dsi_of_match,
	693	},
	694	.probe = panel_simple_dsi_probe,
	695	.remove = panel_simple_dsi_remove,
d02fd93e	696	.shutdown = panel_simple_dsi_shutdown,
280921de TR	697	};
	698
	699	static int __init panel_simple_init(void)
	700	{
210fcd9d TR	701	int err;
	702
	703	err = platform_driver_register(&panel_simple_platform_driver);
	704	if (err < 0)
	705	return err;
	706
	707	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
	708	err = mipi_dsi_driver_register(&panel_simple_dsi_driver);
	709	if (err < 0)
	710	return err;
	711	}
	712
	713	return 0;
280921de TR	714	}
	715	module_init(panel_simple_init);
	716
	717	static void __exit panel_simple_exit(void)
	718	{
210fcd9d TR	719	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
	720	mipi_dsi_driver_unregister(&panel_simple_dsi_driver);
	721
280921de TR	722	platform_driver_unregister(&panel_simple_platform_driver);
	723	}
	724	module_exit(panel_simple_exit);
	725
	726	MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
	727	MODULE_DESCRIPTION("DRM Driver for Simple Panels");
	728	MODULE_LICENSE("GPL and additional rights");