[linux-2.6-block.git] / drivers / gpu / drm / omapdrm / displays / panel-dpi.c

/*
 * Generic MIPI DPI Panel Driver
 *
 * Copyright (C) 2013 Texas Instruments
 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>

#include <video/omapdss.h>
#include <video/omap-panel-data.h>
#include <video/of_display_timing.h>

struct panel_drv_data {
	struct omap_dss_device dssdev;
	struct omap_dss_device *in;

	int data_lines;

	struct omap_video_timings videomode;

	/* used for non-DT boot, to be removed */
	int backlight_gpio;

	struct gpio_desc *enable_gpio;
};

#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)

static int panel_dpi_connect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (omapdss_device_is_connected(dssdev))
		return 0;

	r = in->ops.dpi->connect(in, dssdev);
	if (r)
		return r;

	return 0;
}

static void panel_dpi_disconnect(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (!omapdss_device_is_connected(dssdev))
		return;

	in->ops.dpi->disconnect(in, dssdev);
}

static int panel_dpi_enable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;
	int r;

	if (!omapdss_device_is_connected(dssdev))
		return -ENODEV;

	if (omapdss_device_is_enabled(dssdev))
		return 0;

	if (ddata->data_lines)
		in->ops.dpi->set_data_lines(in, ddata->data_lines);
	in->ops.dpi->set_timings(in, &ddata->videomode);

	r = in->ops.dpi->enable(in);
	if (r)
		return r;

	gpiod_set_value_cansleep(ddata->enable_gpio, 1);

	if (gpio_is_valid(ddata->backlight_gpio))
		gpio_set_value_cansleep(ddata->backlight_gpio, 1);

	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;

	return 0;
}

static void panel_dpi_disable(struct omap_dss_device *dssdev)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	if (!omapdss_device_is_enabled(dssdev))
		return;

	if (gpio_is_valid(ddata->backlight_gpio))
		gpio_set_value_cansleep(ddata->backlight_gpio, 0);

	gpiod_set_value_cansleep(ddata->enable_gpio, 0);

	in->ops.dpi->disable(in);

	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}

static void panel_dpi_set_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	ddata->videomode = *timings;
	dssdev->panel.timings = *timings;

	in->ops.dpi->set_timings(in, timings);
}

static void panel_dpi_get_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);

	*timings = ddata->videomode;
}

static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	struct panel_drv_data *ddata = to_panel_data(dssdev);
	struct omap_dss_device *in = ddata->in;

	return in->ops.dpi->check_timings(in, timings);
}

static struct omap_dss_driver panel_dpi_ops = {
	.connect	= panel_dpi_connect,
	.disconnect	= panel_dpi_disconnect,

	.enable		= panel_dpi_enable,
	.disable	= panel_dpi_disable,

	.set_timings	= panel_dpi_set_timings,
	.get_timings	= panel_dpi_get_timings,
	.check_timings	= panel_dpi_check_timings,

	.get_resolution	= omapdss_default_get_resolution,
};

static int panel_dpi_probe_pdata(struct platform_device *pdev)
{
	const struct panel_dpi_platform_data *pdata;
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct omap_dss_device *dssdev, *in;
	struct videomode vm;
	int r;

	pdata = dev_get_platdata(&pdev->dev);

	in = omap_dss_find_output(pdata->source);
	if (in == NULL) {
		dev_err(&pdev->dev, "failed to find video source '%s'\n",
				pdata->source);
		return -EPROBE_DEFER;
	}

	ddata->in = in;

	ddata->data_lines = pdata->data_lines;

	videomode_from_timing(pdata->display_timing, &vm);
	videomode_to_omap_video_timings(&vm, &ddata->videomode);

	dssdev = &ddata->dssdev;
	dssdev->name = pdata->name;

	r = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
					GPIOF_OUT_INIT_LOW, "panel enable");
	if (r)
		goto err_gpio;

	ddata->enable_gpio = gpio_to_desc(pdata->enable_gpio);

	ddata->backlight_gpio = pdata->backlight_gpio;

	return 0;

err_gpio:
	omap_dss_put_device(ddata->in);
	return r;
}

static int panel_dpi_probe_of(struct platform_device *pdev)
{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct device_node *node = pdev->dev.of_node;
	struct omap_dss_device *in;
	int r;
	struct display_timing timing;
	struct videomode vm;
	struct gpio_desc *gpio;

	gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
	if (IS_ERR(gpio))
		return PTR_ERR(gpio);

	ddata->enable_gpio = gpio;

	ddata->backlight_gpio = -ENOENT;

	r = of_get_display_timing(node, "panel-timing", &timing);
	if (r) {
		dev_err(&pdev->dev, "failed to get video timing\n");
		return r;
	}

	videomode_from_timing(&timing, &vm);
	videomode_to_omap_video_timings(&vm, &ddata->videomode);

	in = omapdss_of_find_source_for_first_ep(node);
	if (IS_ERR(in)) {
		dev_err(&pdev->dev, "failed to find video source\n");
		return PTR_ERR(in);
	}

	ddata->in = in;

	return 0;
}

static int panel_dpi_probe(struct platform_device *pdev)
{
	struct panel_drv_data *ddata;
	struct omap_dss_device *dssdev;
	int r;

	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
	if (ddata == NULL)
		return -ENOMEM;

	platform_set_drvdata(pdev, ddata);

	if (dev_get_platdata(&pdev->dev)) {
		r = panel_dpi_probe_pdata(pdev);
		if (r)
			return r;
	} else if (pdev->dev.of_node) {
		r = panel_dpi_probe_of(pdev);
		if (r)
			return r;
	} else {
		return -ENODEV;
	}

	if (gpio_is_valid(ddata->backlight_gpio)) {
		r = devm_gpio_request_one(&pdev->dev, ddata->backlight_gpio,
				GPIOF_OUT_INIT_LOW, "panel backlight");
		if (r)
			goto err_gpio;
	}

	dssdev = &ddata->dssdev;
	dssdev->dev = &pdev->dev;
	dssdev->driver = &panel_dpi_ops;
	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	dssdev->owner = THIS_MODULE;
	dssdev->panel.timings = ddata->videomode;
	dssdev->phy.dpi.data_lines = ddata->data_lines;

	r = omapdss_register_display(dssdev);
	if (r) {
		dev_err(&pdev->dev, "Failed to register panel\n");
		goto err_reg;
	}

	return 0;

err_reg:
err_gpio:
	omap_dss_put_device(ddata->in);
	return r;
}

static int __exit panel_dpi_remove(struct platform_device *pdev)
{
	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	struct omap_dss_device *dssdev = &ddata->dssdev;
	struct omap_dss_device *in = ddata->in;

	omapdss_unregister_display(dssdev);

	panel_dpi_disable(dssdev);
	panel_dpi_disconnect(dssdev);

	omap_dss_put_device(in);

	return 0;
}

static const struct of_device_id panel_dpi_of_match[] = {
	{ .compatible = "omapdss,panel-dpi", },
	{},
};

MODULE_DEVICE_TABLE(of, panel_dpi_of_match);

static struct platform_driver panel_dpi_driver = {
	.probe = panel_dpi_probe,
	.remove = __exit_p(panel_dpi_remove),
	.driver = {
		.name = "panel-dpi",
		.of_match_table = panel_dpi_of_match,
		.suppress_bind_attrs = true,
	},
};

module_platform_driver(panel_dpi_driver);

MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
MODULE_DESCRIPTION("Generic MIPI DPI Panel Driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
04f0ff02 TV	1	/*
	2	* Generic MIPI DPI Panel Driver
	3	*
	4	* Copyright (C) 2013 Texas Instruments
	5	* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License version 2 as published by
	9	* the Free Software Foundation.
	10	*/
	11
d9e32ecd	12	#include <linux/gpio/consumer.h>
04f0ff02 TV	13	#include <linux/module.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/slab.h>
4843a058 TV	16	#include <linux/of.h>
4843a058 TV	17	#include <linux/of_gpio.h>
04f0ff02 TV	18
	19	#include <video/omapdss.h>
	20	#include <video/omap-panel-data.h>
4843a058	21	#include <video/of_display_timing.h>
04f0ff02 TV	22
	23	struct panel_drv_data {
	24	struct omap_dss_device dssdev;
	25	struct omap_dss_device *in;
	26
	27	int data_lines;
	28
	29	struct omap_video_timings videomode;
	30
56610d9c	31	/* used for non-DT boot, to be removed */
04f0ff02	32	int backlight_gpio;
56610d9c TV	33
56610d9c TV	34	struct gpio_desc *enable_gpio;
04f0ff02 TV	35	};
	36
	37	#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
	38
	39	static int panel_dpi_connect(struct omap_dss_device *dssdev)
	40	{
	41	struct panel_drv_data *ddata = to_panel_data(dssdev);
	42	struct omap_dss_device *in = ddata->in;
	43	int r;
	44
	45	if (omapdss_device_is_connected(dssdev))
	46	return 0;
	47
	48	r = in->ops.dpi->connect(in, dssdev);
	49	if (r)
	50	return r;
	51
	52	return 0;
	53	}
	54
	55	static void panel_dpi_disconnect(struct omap_dss_device *dssdev)
	56	{
	57	struct panel_drv_data *ddata = to_panel_data(dssdev);
	58	struct omap_dss_device *in = ddata->in;
	59
	60	if (!omapdss_device_is_connected(dssdev))
	61	return;
	62
	63	in->ops.dpi->disconnect(in, dssdev);
	64	}
	65
	66	static int panel_dpi_enable(struct omap_dss_device *dssdev)
	67	{
	68	struct panel_drv_data *ddata = to_panel_data(dssdev);
	69	struct omap_dss_device *in = ddata->in;
	70	int r;
	71
	72	if (!omapdss_device_is_connected(dssdev))
	73	return -ENODEV;
	74
	75	if (omapdss_device_is_enabled(dssdev))
	76	return 0;
	77
4843a058 TV	78	if (ddata->data_lines)
4843a058 TV	79	in->ops.dpi->set_data_lines(in, ddata->data_lines);
04f0ff02 TV	80	in->ops.dpi->set_timings(in, &ddata->videomode);
	81
	82	r = in->ops.dpi->enable(in);
	83	if (r)
	84	return r;
	85
ef1ea03d	86	gpiod_set_value_cansleep(ddata->enable_gpio, 1);
04f0ff02 TV	87
	88	if (gpio_is_valid(ddata->backlight_gpio))
	89	gpio_set_value_cansleep(ddata->backlight_gpio, 1);
	90
	91	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	92
	93	return 0;
	94	}
	95
	96	static void panel_dpi_disable(struct omap_dss_device *dssdev)
	97	{
	98	struct panel_drv_data *ddata = to_panel_data(dssdev);
	99	struct omap_dss_device *in = ddata->in;
	100
	101	if (!omapdss_device_is_enabled(dssdev))
	102	return;
	103
04f0ff02 TV	104	if (gpio_is_valid(ddata->backlight_gpio))
	105	gpio_set_value_cansleep(ddata->backlight_gpio, 0);
	106
ef1ea03d	107	gpiod_set_value_cansleep(ddata->enable_gpio, 0);
7f496cfd	108
04f0ff02 TV	109	in->ops.dpi->disable(in);
	110
	111	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
	112	}
	113
	114	static void panel_dpi_set_timings(struct omap_dss_device *dssdev,
	115	struct omap_video_timings *timings)
	116	{
	117	struct panel_drv_data *ddata = to_panel_data(dssdev);
	118	struct omap_dss_device *in = ddata->in;
	119
	120	ddata->videomode = *timings;
	121	dssdev->panel.timings = *timings;
	122
	123	in->ops.dpi->set_timings(in, timings);
	124	}
	125
	126	static void panel_dpi_get_timings(struct omap_dss_device *dssdev,
	127	struct omap_video_timings *timings)
	128	{
	129	struct panel_drv_data *ddata = to_panel_data(dssdev);
	130
	131	*timings = ddata->videomode;
	132	}
	133
	134	static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
	135	struct omap_video_timings *timings)
	136	{
	137	struct panel_drv_data *ddata = to_panel_data(dssdev);
	138	struct omap_dss_device *in = ddata->in;
	139
	140	return in->ops.dpi->check_timings(in, timings);
	141	}
	142
	143	static struct omap_dss_driver panel_dpi_ops = {
	144	.connect = panel_dpi_connect,
	145	.disconnect = panel_dpi_disconnect,
	146
	147	.enable = panel_dpi_enable,
	148	.disable = panel_dpi_disable,
	149
	150	.set_timings = panel_dpi_set_timings,
	151	.get_timings = panel_dpi_get_timings,
	152	.check_timings = panel_dpi_check_timings,
	153
	154	.get_resolution = omapdss_default_get_resolution,
	155	};
	156
	157	static int panel_dpi_probe_pdata(struct platform_device *pdev)
	158	{
	159	const struct panel_dpi_platform_data *pdata;
	160	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	161	struct omap_dss_device dssdev, in;
	162	struct videomode vm;
56610d9c	163	int r;
04f0ff02 TV	164
	165	pdata = dev_get_platdata(&pdev->dev);
	166
	167	in = omap_dss_find_output(pdata->source);
	168	if (in == NULL) {
	169	dev_err(&pdev->dev, "failed to find video source '%s'\n",
	170	pdata->source);
	171	return -EPROBE_DEFER;
	172	}
	173
	174	ddata->in = in;
	175
	176	ddata->data_lines = pdata->data_lines;
	177
	178	videomode_from_timing(pdata->display_timing, &vm);
	179	videomode_to_omap_video_timings(&vm, &ddata->videomode);
	180
	181	dssdev = &ddata->dssdev;
	182	dssdev->name = pdata->name;
	183
56610d9c TV	184	r = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
	185	GPIOF_OUT_INIT_LOW, "panel enable");
	186	if (r)
	187	goto err_gpio;
	188
	189	ddata->enable_gpio = gpio_to_desc(pdata->enable_gpio);
	190
04f0ff02 TV	191	ddata->backlight_gpio = pdata->backlight_gpio;
	192
	193	return 0;
56610d9c TV	194
	195	err_gpio:
	196	omap_dss_put_device(ddata->in);
	197	return r;
04f0ff02 TV	198	}
04f0ff02 TV	199
4843a058 TV	200	static int panel_dpi_probe_of(struct platform_device *pdev)
	201	{
	202	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	203	struct device_node *node = pdev->dev.of_node;
	204	struct omap_dss_device *in;
	205	int r;
	206	struct display_timing timing;
	207	struct videomode vm;
	208	struct gpio_desc *gpio;
	209
ca8c67da UKK	210	gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
	211	if (IS_ERR(gpio))
	212	return PTR_ERR(gpio);
4843a058	213
c6e29d26 TV	214	ddata->enable_gpio = gpio;
c6e29d26 TV	215
4843a058 TV	216	ddata->backlight_gpio = -ENOENT;
	217
	218	r = of_get_display_timing(node, "panel-timing", &timing);
	219	if (r) {
	220	dev_err(&pdev->dev, "failed to get video timing\n");
	221	return r;
	222	}
	223
	224	videomode_from_timing(&timing, &vm);
	225	videomode_to_omap_video_timings(&vm, &ddata->videomode);
	226
	227	in = omapdss_of_find_source_for_first_ep(node);
	228	if (IS_ERR(in)) {
	229	dev_err(&pdev->dev, "failed to find video source\n");
	230	return PTR_ERR(in);
	231	}
	232
	233	ddata->in = in;
	234
	235	return 0;
	236	}
	237
04f0ff02 TV	238	static int panel_dpi_probe(struct platform_device *pdev)
	239	{
	240	struct panel_drv_data *ddata;
	241	struct omap_dss_device *dssdev;
	242	int r;
	243
	244	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
	245	if (ddata == NULL)
	246	return -ENOMEM;
	247
	248	platform_set_drvdata(pdev, ddata);
	249
	250	if (dev_get_platdata(&pdev->dev)) {
	251	r = panel_dpi_probe_pdata(pdev);
	252	if (r)
	253	return r;
4843a058 TV	254	} else if (pdev->dev.of_node) {
	255	r = panel_dpi_probe_of(pdev);
	256	if (r)
	257	return r;
04f0ff02 TV	258	} else {
	259	return -ENODEV;
	260	}
	261
04f0ff02 TV	262	if (gpio_is_valid(ddata->backlight_gpio)) {
	263	r = devm_gpio_request_one(&pdev->dev, ddata->backlight_gpio,
	264	GPIOF_OUT_INIT_LOW, "panel backlight");
	265	if (r)
	266	goto err_gpio;
	267	}
	268
	269	dssdev = &ddata->dssdev;
	270	dssdev->dev = &pdev->dev;
	271	dssdev->driver = &panel_dpi_ops;
	272	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	273	dssdev->owner = THIS_MODULE;
	274	dssdev->panel.timings = ddata->videomode;
	275	dssdev->phy.dpi.data_lines = ddata->data_lines;
	276
	277	r = omapdss_register_display(dssdev);
	278	if (r) {
	279	dev_err(&pdev->dev, "Failed to register panel\n");
	280	goto err_reg;
	281	}
	282
	283	return 0;
	284
	285	err_reg:
	286	err_gpio:
	287	omap_dss_put_device(ddata->in);
	288	return r;
	289	}
	290
	291	static int __exit panel_dpi_remove(struct platform_device *pdev)
	292	{
	293	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	294	struct omap_dss_device *dssdev = &ddata->dssdev;
	295	struct omap_dss_device *in = ddata->in;
	296
	297	omapdss_unregister_display(dssdev);
	298
	299	panel_dpi_disable(dssdev);
	300	panel_dpi_disconnect(dssdev);
	301
	302	omap_dss_put_device(in);
	303
	304	return 0;
	305	}
	306
4843a058 TV	307	static const struct of_device_id panel_dpi_of_match[] = {
	308	{ .compatible = "omapdss,panel-dpi", },
	309	{},
	310	};
	311
	312	MODULE_DEVICE_TABLE(of, panel_dpi_of_match);
	313
04f0ff02 TV	314	static struct platform_driver panel_dpi_driver = {
	315	.probe = panel_dpi_probe,
	316	.remove = __exit_p(panel_dpi_remove),
	317	.driver = {
	318	.name = "panel-dpi",
4843a058	319	.of_match_table = panel_dpi_of_match,
422ccbd5	320	.suppress_bind_attrs = true,
04f0ff02 TV	321	},
	322	};
	323
	324	module_platform_driver(panel_dpi_driver);
	325
	326	MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
	327	MODULE_DESCRIPTION("Generic MIPI DPI Panel Driver");
	328	MODULE_LICENSE("GPL");