[linux-2.6-block.git] / drivers / video / fbdev / omap2 / displays-new / 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.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;

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

	if (gpio_is_valid(ddata->backlight_gpio))
		gpio_set_value_cansleep(ddata->backlight_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(&pdev->dev, "enable");

	if (IS_ERR(gpio)) {
		if (PTR_ERR(gpio) != -ENOENT)
			return PTR_ERR(gpio);
		else
			gpio = NULL;
	} else {
		gpiod_direction_output(gpio, 0);
	}

	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",
		.owner = THIS_MODULE,
		.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
	12	#include <linux/gpio.h>
	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
56610d9c TV	86	if (ddata->enable_gpio)
56610d9c TV	87	gpiod_set_value_cansleep(ddata->enable_gpio, 1);
04f0ff02 TV	88
	89	if (gpio_is_valid(ddata->backlight_gpio))
	90	gpio_set_value_cansleep(ddata->backlight_gpio, 1);
	91
	92	dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
	93
	94	return 0;
	95	}
	96
	97	static void panel_dpi_disable(struct omap_dss_device *dssdev)
	98	{
	99	struct panel_drv_data *ddata = to_panel_data(dssdev);
	100	struct omap_dss_device *in = ddata->in;
	101
	102	if (!omapdss_device_is_enabled(dssdev))
	103	return;
	104
56610d9c TV	105	if (ddata->enable_gpio)
56610d9c TV	106	gpiod_set_value_cansleep(ddata->enable_gpio, 0);
04f0ff02 TV	107
	108	if (gpio_is_valid(ddata->backlight_gpio))
	109	gpio_set_value_cansleep(ddata->backlight_gpio, 0);
	110
	111	in->ops.dpi->disable(in);
	112
	113	dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
	114	}
	115
	116	static void panel_dpi_set_timings(struct omap_dss_device *dssdev,
	117	struct omap_video_timings *timings)
	118	{
	119	struct panel_drv_data *ddata = to_panel_data(dssdev);
	120	struct omap_dss_device *in = ddata->in;
	121
	122	ddata->videomode = *timings;
	123	dssdev->panel.timings = *timings;
	124
	125	in->ops.dpi->set_timings(in, timings);
	126	}
	127
	128	static void panel_dpi_get_timings(struct omap_dss_device *dssdev,
	129	struct omap_video_timings *timings)
	130	{
	131	struct panel_drv_data *ddata = to_panel_data(dssdev);
	132
	133	*timings = ddata->videomode;
	134	}
	135
	136	static int panel_dpi_check_timings(struct omap_dss_device *dssdev,
	137	struct omap_video_timings *timings)
	138	{
	139	struct panel_drv_data *ddata = to_panel_data(dssdev);
	140	struct omap_dss_device *in = ddata->in;
	141
	142	return in->ops.dpi->check_timings(in, timings);
	143	}
	144
	145	static struct omap_dss_driver panel_dpi_ops = {
	146	.connect = panel_dpi_connect,
	147	.disconnect = panel_dpi_disconnect,
	148
	149	.enable = panel_dpi_enable,
	150	.disable = panel_dpi_disable,
	151
	152	.set_timings = panel_dpi_set_timings,
	153	.get_timings = panel_dpi_get_timings,
	154	.check_timings = panel_dpi_check_timings,
	155
	156	.get_resolution = omapdss_default_get_resolution,
	157	};
	158
	159	static int panel_dpi_probe_pdata(struct platform_device *pdev)
	160	{
	161	const struct panel_dpi_platform_data *pdata;
	162	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	163	struct omap_dss_device dssdev, in;
	164	struct videomode vm;
56610d9c	165	int r;
04f0ff02 TV	166
	167	pdata = dev_get_platdata(&pdev->dev);
	168
	169	in = omap_dss_find_output(pdata->source);
	170	if (in == NULL) {
	171	dev_err(&pdev->dev, "failed to find video source '%s'\n",
	172	pdata->source);
	173	return -EPROBE_DEFER;
	174	}
	175
	176	ddata->in = in;
	177
	178	ddata->data_lines = pdata->data_lines;
	179
	180	videomode_from_timing(pdata->display_timing, &vm);
	181	videomode_to_omap_video_timings(&vm, &ddata->videomode);
	182
	183	dssdev = &ddata->dssdev;
	184	dssdev->name = pdata->name;
	185
56610d9c TV	186	r = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
	187	GPIOF_OUT_INIT_LOW, "panel enable");
	188	if (r)
	189	goto err_gpio;
	190
	191	ddata->enable_gpio = gpio_to_desc(pdata->enable_gpio);
	192
04f0ff02 TV	193	ddata->backlight_gpio = pdata->backlight_gpio;
	194
	195	return 0;
56610d9c TV	196
	197	err_gpio:
	198	omap_dss_put_device(ddata->in);
	199	return r;
04f0ff02 TV	200	}
04f0ff02 TV	201
4843a058 TV	202	static int panel_dpi_probe_of(struct platform_device *pdev)
	203	{
	204	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	205	struct device_node *node = pdev->dev.of_node;
	206	struct omap_dss_device *in;
	207	int r;
	208	struct display_timing timing;
	209	struct videomode vm;
	210	struct gpio_desc *gpio;
	211
	212	gpio = devm_gpiod_get(&pdev->dev, "enable");
c6e29d26	213
4843a058	214	if (IS_ERR(gpio)) {
c6e29d26 TV	215	if (PTR_ERR(gpio) != -ENOENT)
	216	return PTR_ERR(gpio);
	217	else
	218	gpio = NULL;
4843a058 TV	219	} else {
4843a058 TV	220	gpiod_direction_output(gpio, 0);
4843a058 TV	221	}
4843a058 TV	222
c6e29d26 TV	223	ddata->enable_gpio = gpio;
c6e29d26 TV	224
4843a058 TV	225	ddata->backlight_gpio = -ENOENT;
	226
	227	r = of_get_display_timing(node, "panel-timing", &timing);
	228	if (r) {
	229	dev_err(&pdev->dev, "failed to get video timing\n");
	230	return r;
	231	}
	232
	233	videomode_from_timing(&timing, &vm);
	234	videomode_to_omap_video_timings(&vm, &ddata->videomode);
	235
	236	in = omapdss_of_find_source_for_first_ep(node);
	237	if (IS_ERR(in)) {
	238	dev_err(&pdev->dev, "failed to find video source\n");
	239	return PTR_ERR(in);
	240	}
	241
	242	ddata->in = in;
	243
	244	return 0;
	245	}
	246
04f0ff02 TV	247	static int panel_dpi_probe(struct platform_device *pdev)
	248	{
	249	struct panel_drv_data *ddata;
	250	struct omap_dss_device *dssdev;
	251	int r;
	252
	253	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
	254	if (ddata == NULL)
	255	return -ENOMEM;
	256
	257	platform_set_drvdata(pdev, ddata);
	258
	259	if (dev_get_platdata(&pdev->dev)) {
	260	r = panel_dpi_probe_pdata(pdev);
	261	if (r)
	262	return r;
4843a058 TV	263	} else if (pdev->dev.of_node) {
	264	r = panel_dpi_probe_of(pdev);
	265	if (r)
	266	return r;
04f0ff02 TV	267	} else {
	268	return -ENODEV;
	269	}
	270
04f0ff02 TV	271	if (gpio_is_valid(ddata->backlight_gpio)) {
	272	r = devm_gpio_request_one(&pdev->dev, ddata->backlight_gpio,
	273	GPIOF_OUT_INIT_LOW, "panel backlight");
	274	if (r)
	275	goto err_gpio;
	276	}
	277
	278	dssdev = &ddata->dssdev;
	279	dssdev->dev = &pdev->dev;
	280	dssdev->driver = &panel_dpi_ops;
	281	dssdev->type = OMAP_DISPLAY_TYPE_DPI;
	282	dssdev->owner = THIS_MODULE;
	283	dssdev->panel.timings = ddata->videomode;
	284	dssdev->phy.dpi.data_lines = ddata->data_lines;
	285
	286	r = omapdss_register_display(dssdev);
	287	if (r) {
	288	dev_err(&pdev->dev, "Failed to register panel\n");
	289	goto err_reg;
	290	}
	291
	292	return 0;
	293
	294	err_reg:
	295	err_gpio:
	296	omap_dss_put_device(ddata->in);
	297	return r;
	298	}
	299
	300	static int __exit panel_dpi_remove(struct platform_device *pdev)
	301	{
	302	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
	303	struct omap_dss_device *dssdev = &ddata->dssdev;
	304	struct omap_dss_device *in = ddata->in;
	305
	306	omapdss_unregister_display(dssdev);
	307
	308	panel_dpi_disable(dssdev);
	309	panel_dpi_disconnect(dssdev);
	310
	311	omap_dss_put_device(in);
	312
	313	return 0;
	314	}
	315
4843a058 TV	316	static const struct of_device_id panel_dpi_of_match[] = {
	317	{ .compatible = "omapdss,panel-dpi", },
	318	{},
	319	};
	320
	321	MODULE_DEVICE_TABLE(of, panel_dpi_of_match);
	322
04f0ff02 TV	323	static struct platform_driver panel_dpi_driver = {
	324	.probe = panel_dpi_probe,
	325	.remove = __exit_p(panel_dpi_remove),
	326	.driver = {
	327	.name = "panel-dpi",
	328	.owner = THIS_MODULE,
4843a058	329	.of_match_table = panel_dpi_of_match,
422ccbd5	330	.suppress_bind_attrs = true,
04f0ff02 TV	331	},
	332	};
	333
	334	module_platform_driver(panel_dpi_driver);
	335
	336	MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
	337	MODULE_DESCRIPTION("Generic MIPI DPI Panel Driver");
	338	MODULE_LICENSE("GPL");