[deliverable/linux.git] / drivers / gpu / drm / omapdrm / dss / display.c

/*
 * linux/drivers/video/omap2/dss/display.c
 *
 * Copyright (C) 2009 Nokia Corporation
 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
 *
 * Some code and ideas taken from drivers/video/omap/ driver
 * by Imre Deak.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#define DSS_SUBSYS_NAME "DISPLAY"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/of.h>

#include "omapdss.h"
#include "dss.h"
#include "dss_features.h"

void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
			u16 *xres, u16 *yres)
{
	*xres = dssdev->panel.timings.x_res;
	*yres = dssdev->panel.timings.y_res;
}
EXPORT_SYMBOL(omapdss_default_get_resolution);

int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
{
	switch (dssdev->type) {
	case OMAP_DISPLAY_TYPE_DPI:
		if (dssdev->phy.dpi.data_lines == 24)
			return 24;
		else
			return 16;

	case OMAP_DISPLAY_TYPE_DBI:
		if (dssdev->ctrl.pixel_size == 24)
			return 24;
		else
			return 16;
	case OMAP_DISPLAY_TYPE_DSI:
		if (dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt) > 16)
			return 24;
		else
			return 16;
	case OMAP_DISPLAY_TYPE_VENC:
	case OMAP_DISPLAY_TYPE_SDI:
	case OMAP_DISPLAY_TYPE_HDMI:
	case OMAP_DISPLAY_TYPE_DVI:
		return 24;
	default:
		BUG();
		return 0;
	}
}
EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);

void omapdss_default_get_timings(struct omap_dss_device *dssdev,
		struct omap_video_timings *timings)
{
	*timings = dssdev->panel.timings;
}
EXPORT_SYMBOL(omapdss_default_get_timings);

static LIST_HEAD(panel_list);
static DEFINE_MUTEX(panel_list_mutex);
static int disp_num_counter;

int omapdss_register_display(struct omap_dss_device *dssdev)
{
	struct omap_dss_driver *drv = dssdev->driver;
	int id;

	/*
	 * Note: this presumes all the displays are either using DT or non-DT,
	 * which normally should be the case. This also presumes that all
	 * displays either have an DT alias, or none has.
	 */

	if (dssdev->dev->of_node) {
		id = of_alias_get_id(dssdev->dev->of_node, "display");

		if (id < 0)
			id = disp_num_counter++;
	} else {
		id = disp_num_counter++;
	}

	snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);

	/* Use 'label' property for name, if it exists */
	if (dssdev->dev->of_node)
		of_property_read_string(dssdev->dev->of_node, "label",
			&dssdev->name);

	if (dssdev->name == NULL)
		dssdev->name = dssdev->alias;

	if (drv && drv->get_resolution == NULL)
		drv->get_resolution = omapdss_default_get_resolution;
	if (drv && drv->get_recommended_bpp == NULL)
		drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
	if (drv && drv->get_timings == NULL)
		drv->get_timings = omapdss_default_get_timings;

	mutex_lock(&panel_list_mutex);
	list_add_tail(&dssdev->panel_list, &panel_list);
	mutex_unlock(&panel_list_mutex);
	return 0;
}
EXPORT_SYMBOL(omapdss_register_display);

void omapdss_unregister_display(struct omap_dss_device *dssdev)
{
	mutex_lock(&panel_list_mutex);
	list_del(&dssdev->panel_list);
	mutex_unlock(&panel_list_mutex);
}
EXPORT_SYMBOL(omapdss_unregister_display);

struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev)
{
	if (!try_module_get(dssdev->owner))
		return NULL;

	if (get_device(dssdev->dev) == NULL) {
		module_put(dssdev->owner);
		return NULL;
	}

	return dssdev;
}
EXPORT_SYMBOL(omap_dss_get_device);

void omap_dss_put_device(struct omap_dss_device *dssdev)
{
	put_device(dssdev->dev);
	module_put(dssdev->owner);
}
EXPORT_SYMBOL(omap_dss_put_device);

/*
 * ref count of the found device is incremented.
 * ref count of from-device is decremented.
 */
struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
{
	struct list_head *l;
	struct omap_dss_device *dssdev;

	mutex_lock(&panel_list_mutex);

	if (list_empty(&panel_list)) {
		dssdev = NULL;
		goto out;
	}

	if (from == NULL) {
		dssdev = list_first_entry(&panel_list, struct omap_dss_device,
				panel_list);
		omap_dss_get_device(dssdev);
		goto out;
	}

	omap_dss_put_device(from);

	list_for_each(l, &panel_list) {
		dssdev = list_entry(l, struct omap_dss_device, panel_list);
		if (dssdev == from) {
			if (list_is_last(l, &panel_list)) {
				dssdev = NULL;
				goto out;
			}

			dssdev = list_entry(l->next, struct omap_dss_device,
					panel_list);
			omap_dss_get_device(dssdev);
			goto out;
		}
	}

	WARN(1, "'from' dssdev not found\n");

	dssdev = NULL;
out:
	mutex_unlock(&panel_list_mutex);
	return dssdev;
}
EXPORT_SYMBOL(omap_dss_get_next_device);

struct omap_dss_device *omap_dss_find_device(void *data,
		int (*match)(struct omap_dss_device *dssdev, void *data))
{
	struct omap_dss_device *dssdev = NULL;

	while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
		if (match(dssdev, data))
			return dssdev;
	}

	return NULL;
}
EXPORT_SYMBOL(omap_dss_find_device);

void videomode_to_omap_video_timings(const struct videomode *vm,
		struct omap_video_timings *ovt)
{
	memset(ovt, 0, sizeof(*ovt));

	ovt->pixelclock = vm->pixelclock;
	ovt->x_res = vm->hactive;
	ovt->hbp = vm->hback_porch;
	ovt->hfp = vm->hfront_porch;
	ovt->hsw = vm->hsync_len;
	ovt->y_res = vm->vactive;
	ovt->vbp = vm->vback_porch;
	ovt->vfp = vm->vfront_porch;
	ovt->vsw = vm->vsync_len;

	ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
		OMAPDSS_SIG_ACTIVE_HIGH :
		OMAPDSS_SIG_ACTIVE_LOW;
	ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
		OMAPDSS_SIG_ACTIVE_HIGH :
		OMAPDSS_SIG_ACTIVE_LOW;
	ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
		OMAPDSS_SIG_ACTIVE_HIGH :
		OMAPDSS_SIG_ACTIVE_LOW;
	ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
		OMAPDSS_DRIVE_SIG_RISING_EDGE :
		OMAPDSS_DRIVE_SIG_FALLING_EDGE;

	ovt->sync_pclk_edge = ovt->data_pclk_edge;
}
EXPORT_SYMBOL(videomode_to_omap_video_timings);

void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
		struct videomode *vm)
{
	memset(vm, 0, sizeof(*vm));

	vm->pixelclock = ovt->pixelclock;

	vm->hactive = ovt->x_res;
	vm->hback_porch = ovt->hbp;
	vm->hfront_porch = ovt->hfp;
	vm->hsync_len = ovt->hsw;
	vm->vactive = ovt->y_res;
	vm->vback_porch = ovt->vbp;
	vm->vfront_porch = ovt->vfp;
	vm->vsync_len = ovt->vsw;

	if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
		vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
	else
		vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;

	if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
		vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
	else
		vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;

	if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
		vm->flags |= DISPLAY_FLAGS_DE_HIGH;
	else
		vm->flags |= DISPLAY_FLAGS_DE_LOW;

	if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
		vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
	else
		vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
}
EXPORT_SYMBOL(omap_video_timings_to_videomode);
Commit	Line	Data
eed07e0e TV	1	/*
	2	* linux/drivers/video/omap2/dss/display.c
	3	*
	4	* Copyright (C) 2009 Nokia Corporation
	5	* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
	6	*
	7	* Some code and ideas taken from drivers/video/omap/ driver
	8	* by Imre Deak.
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License version 2 as published by
	12	* the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but WITHOUT
	15	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	17	* more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along with
	20	* this program. If not, see <http://www.gnu.org/licenses/>.
	21	*/
	22
	23	#define DSS_SUBSYS_NAME "DISPLAY"
	24
	25	#include <linux/kernel.h>
	26	#include <linux/module.h>
	27	#include <linux/jiffies.h>
eed07e0e	28	#include <linux/platform_device.h>
7f2bcd06	29	#include <linux/of.h>
eed07e0e	30
32043da7	31	#include "omapdss.h"
eed07e0e	32	#include "dss.h"
5ed8cf5b	33	#include "dss_features.h"
eed07e0e	34
96adcece	35	void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
eed07e0e TV	36	u16 xres, u16 yres)
	37	{
	38	*xres = dssdev->panel.timings.x_res;
	39	*yres = dssdev->panel.timings.y_res;
	40	}
96adcece	41	EXPORT_SYMBOL(omapdss_default_get_resolution);
eed07e0e	42
a2699504	43	int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
eed07e0e	44	{
eed07e0e TV	45	switch (dssdev->type) {
	46	case OMAP_DISPLAY_TYPE_DPI:
	47	if (dssdev->phy.dpi.data_lines == 24)
	48	return 24;
	49	else
	50	return 16;
	51
	52	case OMAP_DISPLAY_TYPE_DBI:
eed07e0e TV	53	if (dssdev->ctrl.pixel_size == 24)
	54	return 24;
	55	else
	56	return 16;
a3b3cc2b AT	57	case OMAP_DISPLAY_TYPE_DSI:
	58	if (dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt) > 16)
	59	return 24;
	60	else
	61	return 16;
eed07e0e TV	62	case OMAP_DISPLAY_TYPE_VENC:
eed07e0e TV	63	case OMAP_DISPLAY_TYPE_SDI:
b119601d	64	case OMAP_DISPLAY_TYPE_HDMI:
bc24b8b6	65	case OMAP_DISPLAY_TYPE_DVI:
eed07e0e	66	return 24;
eed07e0e TV	67	default:
eed07e0e TV	68	BUG();
c6eee968	69	return 0;
eed07e0e TV	70	}
eed07e0e TV	71	}
a2699504	72	EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
eed07e0e	73
4b6430fc GI	74	void omapdss_default_get_timings(struct omap_dss_device *dssdev,
	75	struct omap_video_timings *timings)
	76	{
	77	*timings = dssdev->panel.timings;
	78	}
	79	EXPORT_SYMBOL(omapdss_default_get_timings);
	80
2e7e3dc7 TV	81	static LIST_HEAD(panel_list);
	82	static DEFINE_MUTEX(panel_list_mutex);
	83	static int disp_num_counter;
	84
	85	int omapdss_register_display(struct omap_dss_device *dssdev)
	86	{
	87	struct omap_dss_driver *drv = dssdev->driver;
3e22b355	88	int id;
2e7e3dc7	89
3e22b355 TV	90	/*
	91	* Note: this presumes all the displays are either using DT or non-DT,
	92	* which normally should be the case. This also presumes that all
	93	* displays either have an DT alias, or none has.
	94	*/
	95
	96	if (dssdev->dev->of_node) {
	97	id = of_alias_get_id(dssdev->dev->of_node, "display");
	98
	99	if (id < 0)
	100	id = disp_num_counter++;
	101	} else {
	102	id = disp_num_counter++;
	103	}
	104
	105	snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id);
2e7e3dc7	106
7f2bcd06 TV	107	/* Use 'label' property for name, if it exists */
	108	if (dssdev->dev->of_node)
	109	of_property_read_string(dssdev->dev->of_node, "label",
	110	&dssdev->name);
	111
	112	if (dssdev->name == NULL)
	113	dssdev->name = dssdev->alias;
2e7e3dc7 TV	114
	115	if (drv && drv->get_resolution == NULL)
	116	drv->get_resolution = omapdss_default_get_resolution;
	117	if (drv && drv->get_recommended_bpp == NULL)
	118	drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
	119	if (drv && drv->get_timings == NULL)
	120	drv->get_timings = omapdss_default_get_timings;
	121
	122	mutex_lock(&panel_list_mutex);
	123	list_add_tail(&dssdev->panel_list, &panel_list);
	124	mutex_unlock(&panel_list_mutex);
	125	return 0;
	126	}
	127	EXPORT_SYMBOL(omapdss_register_display);
	128
	129	void omapdss_unregister_display(struct omap_dss_device *dssdev)
	130	{
	131	mutex_lock(&panel_list_mutex);
	132	list_del(&dssdev->panel_list);
	133	mutex_unlock(&panel_list_mutex);
	134	}
	135	EXPORT_SYMBOL(omapdss_unregister_display);
eed07e0e	136
d35317a4	137	struct omap_dss_device omap_dss_get_device(struct omap_dss_device dssdev)
eed07e0e	138	{
d35317a4 TV	139	if (!try_module_get(dssdev->owner))
	140	return NULL;
	141
	142	if (get_device(dssdev->dev) == NULL) {
	143	module_put(dssdev->owner);
	144	return NULL;
	145	}
	146
	147	return dssdev;
eed07e0e TV	148	}
	149	EXPORT_SYMBOL(omap_dss_get_device);
	150
	151	void omap_dss_put_device(struct omap_dss_device *dssdev)
	152	{
ecc8b370	153	put_device(dssdev->dev);
d35317a4	154	module_put(dssdev->owner);
eed07e0e TV	155	}
	156	EXPORT_SYMBOL(omap_dss_put_device);
	157
67b23ca1 TV	158	/*
	159	* ref count of the found device is incremented.
	160	* ref count of from-device is decremented.
	161	*/
eed07e0e TV	162	struct omap_dss_device omap_dss_get_next_device(struct omap_dss_device from)
eed07e0e TV	163	{
67b23ca1 TV	164	struct list_head *l;
	165	struct omap_dss_device *dssdev;
	166
	167	mutex_lock(&panel_list_mutex);
eed07e0e	168
67b23ca1 TV	169	if (list_empty(&panel_list)) {
	170	dssdev = NULL;
	171	goto out;
eed07e0e TV	172	}
eed07e0e TV	173
67b23ca1 TV	174	if (from == NULL) {
	175	dssdev = list_first_entry(&panel_list, struct omap_dss_device,
	176	panel_list);
	177	omap_dss_get_device(dssdev);
	178	goto out;
	179	}
	180
	181	omap_dss_put_device(from);
	182
	183	list_for_each(l, &panel_list) {
	184	dssdev = list_entry(l, struct omap_dss_device, panel_list);
	185	if (dssdev == from) {
	186	if (list_is_last(l, &panel_list)) {
	187	dssdev = NULL;
	188	goto out;
	189	}
	190
	191	dssdev = list_entry(l->next, struct omap_dss_device,
	192	panel_list);
	193	omap_dss_get_device(dssdev);
	194	goto out;
	195	}
	196	}
eed07e0e	197
67b23ca1 TV	198	WARN(1, "'from' dssdev not found\n");
	199
	200	dssdev = NULL;
	201	out:
	202	mutex_unlock(&panel_list_mutex);
eed07e0e TV	203	return dssdev;
	204	}
	205	EXPORT_SYMBOL(omap_dss_get_next_device);
	206
	207	struct omap_dss_device omap_dss_find_device(void data,
	208	int (match)(struct omap_dss_device dssdev, void *data))
	209	{
	210	struct omap_dss_device *dssdev = NULL;
	211
	212	while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
	213	if (match(dssdev, data))
	214	return dssdev;
	215	}
	216
	217	return NULL;
	218	}
	219	EXPORT_SYMBOL(omap_dss_find_device);
	220
6fcd485b TV	221	void videomode_to_omap_video_timings(const struct videomode *vm,
	222	struct omap_video_timings *ovt)
	223	{
	224	memset(ovt, 0, sizeof(*ovt));
	225
d8d78941	226	ovt->pixelclock = vm->pixelclock;
6fcd485b TV	227	ovt->x_res = vm->hactive;
	228	ovt->hbp = vm->hback_porch;
	229	ovt->hfp = vm->hfront_porch;
	230	ovt->hsw = vm->hsync_len;
	231	ovt->y_res = vm->vactive;
	232	ovt->vbp = vm->vback_porch;
	233	ovt->vfp = vm->vfront_porch;
	234	ovt->vsw = vm->vsync_len;
	235
	236	ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
	237	OMAPDSS_SIG_ACTIVE_HIGH :
	238	OMAPDSS_SIG_ACTIVE_LOW;
	239	ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
	240	OMAPDSS_SIG_ACTIVE_HIGH :
	241	OMAPDSS_SIG_ACTIVE_LOW;
	242	ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
	243	OMAPDSS_SIG_ACTIVE_HIGH :
9b842a47	244	OMAPDSS_SIG_ACTIVE_LOW;
6fcd485b TV	245	ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
	246	OMAPDSS_DRIVE_SIG_RISING_EDGE :
	247	OMAPDSS_DRIVE_SIG_FALLING_EDGE;
	248
386f167c	249	ovt->sync_pclk_edge = ovt->data_pclk_edge;
6fcd485b TV	250	}
	251	EXPORT_SYMBOL(videomode_to_omap_video_timings);
	252
	253	void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
	254	struct videomode *vm)
	255	{
	256	memset(vm, 0, sizeof(*vm));
	257
d8d78941	258	vm->pixelclock = ovt->pixelclock;
6fcd485b TV	259
	260	vm->hactive = ovt->x_res;
	261	vm->hback_porch = ovt->hbp;
	262	vm->hfront_porch = ovt->hfp;
	263	vm->hsync_len = ovt->hsw;
	264	vm->vactive = ovt->y_res;
	265	vm->vback_porch = ovt->vbp;
	266	vm->vfront_porch = ovt->vfp;
	267	vm->vsync_len = ovt->vsw;
	268
	269	if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
	270	vm->flags \|= DISPLAY_FLAGS_HSYNC_HIGH;
	271	else
	272	vm->flags \|= DISPLAY_FLAGS_HSYNC_LOW;
	273
	274	if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
	275	vm->flags \|= DISPLAY_FLAGS_VSYNC_HIGH;
	276	else
	277	vm->flags \|= DISPLAY_FLAGS_VSYNC_LOW;
	278
	279	if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
	280	vm->flags \|= DISPLAY_FLAGS_DE_HIGH;
	281	else
	282	vm->flags \|= DISPLAY_FLAGS_DE_LOW;
	283
	284	if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
	285	vm->flags \|= DISPLAY_FLAGS_PIXDATA_POSEDGE;
	286	else
	287	vm->flags \|= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
	288	}
	289	EXPORT_SYMBOL(omap_video_timings_to_videomode);