[deliverable/linux.git] / drivers / video / omap2 / 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 <video/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);

int dss_suspend_all_devices(void)
{
	struct omap_dss_device *dssdev = NULL;

	for_each_dss_dev(dssdev) {
		if (!dssdev->driver)
			continue;

		if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
			dssdev->driver->disable(dssdev);
			dssdev->activate_after_resume = true;
		} else {
			dssdev->activate_after_resume = false;
		}
	}

	return 0;
}

int dss_resume_all_devices(void)
{
	struct omap_dss_device *dssdev = NULL;

	for_each_dss_dev(dssdev) {
		if (!dssdev->driver)
			continue;

		if (dssdev->activate_after_resume) {
			dssdev->driver->enable(dssdev);
			dssdev->activate_after_resume = false;
		}
	}

	return 0;
}

void dss_disable_all_devices(void)
{
	struct omap_dss_device *dssdev = NULL;

	for_each_dss_dev(dssdev) {
		if (!dssdev->driver)
			continue;

		if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
			dssdev->driver->disable(dssdev);
	}
}

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;

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

	/* 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->pixel_clock = vm->pixelclock / 1000;
	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 = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
}
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->pixel_clock * 1000;

	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
a0b38cc4	31	#include <video/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
eed07e0e TV	81	int dss_suspend_all_devices(void)
eed07e0e TV	82	{
a65c8bda TV	83	struct omap_dss_device *dssdev = NULL;
	84
	85	for_each_dss_dev(dssdev) {
	86	if (!dssdev->driver)
	87	continue;
	88
	89	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
	90	dssdev->driver->disable(dssdev);
	91	dssdev->activate_after_resume = true;
	92	} else {
	93	dssdev->activate_after_resume = false;
	94	}
eed07e0e TV	95	}
	96
	97	return 0;
	98	}
	99
eed07e0e TV	100	int dss_resume_all_devices(void)
eed07e0e TV	101	{
a65c8bda	102	struct omap_dss_device *dssdev = NULL;
eed07e0e	103
a65c8bda TV	104	for_each_dss_dev(dssdev) {
	105	if (!dssdev->driver)
	106	continue;
279fcd48	107
a65c8bda TV	108	if (dssdev->activate_after_resume) {
	109	dssdev->driver->enable(dssdev);
	110	dssdev->activate_after_resume = false;
	111	}
	112	}
279fcd48	113
eed07e0e TV	114	return 0;
	115	}
	116
	117	void dss_disable_all_devices(void)
	118	{
a65c8bda TV	119	struct omap_dss_device *dssdev = NULL;
	120
	121	for_each_dss_dev(dssdev) {
	122	if (!dssdev->driver)
	123	continue;
	124
	125	if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
	126	dssdev->driver->disable(dssdev);
	127	}
eed07e0e TV	128	}
eed07e0e TV	129
2e7e3dc7 TV	130	static LIST_HEAD(panel_list);
	131	static DEFINE_MUTEX(panel_list_mutex);
	132	static int disp_num_counter;
	133
	134	int omapdss_register_display(struct omap_dss_device *dssdev)
	135	{
	136	struct omap_dss_driver *drv = dssdev->driver;
	137
	138	snprintf(dssdev->alias, sizeof(dssdev->alias),
	139	"display%d", disp_num_counter++);
	140
7f2bcd06 TV	141	/* Use 'label' property for name, if it exists */
	142	if (dssdev->dev->of_node)
	143	of_property_read_string(dssdev->dev->of_node, "label",
	144	&dssdev->name);
	145
	146	if (dssdev->name == NULL)
	147	dssdev->name = dssdev->alias;
	148
2e7e3dc7 TV	149	if (drv && drv->get_resolution == NULL)
	150	drv->get_resolution = omapdss_default_get_resolution;
	151	if (drv && drv->get_recommended_bpp == NULL)
	152	drv->get_recommended_bpp = omapdss_default_get_recommended_bpp;
	153	if (drv && drv->get_timings == NULL)
	154	drv->get_timings = omapdss_default_get_timings;
	155
	156	mutex_lock(&panel_list_mutex);
	157	list_add_tail(&dssdev->panel_list, &panel_list);
	158	mutex_unlock(&panel_list_mutex);
	159	return 0;
	160	}
	161	EXPORT_SYMBOL(omapdss_register_display);
	162
	163	void omapdss_unregister_display(struct omap_dss_device *dssdev)
	164	{
	165	mutex_lock(&panel_list_mutex);
	166	list_del(&dssdev->panel_list);
	167	mutex_unlock(&panel_list_mutex);
	168	}
	169	EXPORT_SYMBOL(omapdss_unregister_display);
eed07e0e	170
d35317a4	171	struct omap_dss_device omap_dss_get_device(struct omap_dss_device dssdev)
eed07e0e	172	{
d35317a4 TV	173	if (!try_module_get(dssdev->owner))
	174	return NULL;
	175
	176	if (get_device(dssdev->dev) == NULL) {
	177	module_put(dssdev->owner);
	178	return NULL;
	179	}
	180
	181	return dssdev;
eed07e0e TV	182	}
	183	EXPORT_SYMBOL(omap_dss_get_device);
	184
	185	void omap_dss_put_device(struct omap_dss_device *dssdev)
	186	{
ecc8b370	187	put_device(dssdev->dev);
d35317a4	188	module_put(dssdev->owner);
eed07e0e TV	189	}
	190	EXPORT_SYMBOL(omap_dss_put_device);
	191
67b23ca1 TV	192	/*
	193	* ref count of the found device is incremented.
	194	* ref count of from-device is decremented.
	195	*/
eed07e0e TV	196	struct omap_dss_device omap_dss_get_next_device(struct omap_dss_device from)
eed07e0e TV	197	{
67b23ca1 TV	198	struct list_head *l;
	199	struct omap_dss_device *dssdev;
	200
	201	mutex_lock(&panel_list_mutex);
eed07e0e	202
67b23ca1 TV	203	if (list_empty(&panel_list)) {
	204	dssdev = NULL;
	205	goto out;
eed07e0e TV	206	}
eed07e0e TV	207
67b23ca1 TV	208	if (from == NULL) {
	209	dssdev = list_first_entry(&panel_list, struct omap_dss_device,
	210	panel_list);
	211	omap_dss_get_device(dssdev);
	212	goto out;
	213	}
	214
	215	omap_dss_put_device(from);
	216
	217	list_for_each(l, &panel_list) {
	218	dssdev = list_entry(l, struct omap_dss_device, panel_list);
	219	if (dssdev == from) {
	220	if (list_is_last(l, &panel_list)) {
	221	dssdev = NULL;
	222	goto out;
	223	}
	224
	225	dssdev = list_entry(l->next, struct omap_dss_device,
	226	panel_list);
	227	omap_dss_get_device(dssdev);
	228	goto out;
	229	}
	230	}
eed07e0e	231
67b23ca1 TV	232	WARN(1, "'from' dssdev not found\n");
	233
	234	dssdev = NULL;
	235	out:
	236	mutex_unlock(&panel_list_mutex);
eed07e0e TV	237	return dssdev;
	238	}
	239	EXPORT_SYMBOL(omap_dss_get_next_device);
	240
	241	struct omap_dss_device omap_dss_find_device(void data,
	242	int (match)(struct omap_dss_device dssdev, void *data))
	243	{
	244	struct omap_dss_device *dssdev = NULL;
	245
	246	while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
	247	if (match(dssdev, data))
	248	return dssdev;
	249	}
	250
	251	return NULL;
	252	}
	253	EXPORT_SYMBOL(omap_dss_find_device);
	254
6fcd485b TV	255	void videomode_to_omap_video_timings(const struct videomode *vm,
	256	struct omap_video_timings *ovt)
	257	{
	258	memset(ovt, 0, sizeof(*ovt));
	259
	260	ovt->pixel_clock = vm->pixelclock / 1000;
	261	ovt->x_res = vm->hactive;
	262	ovt->hbp = vm->hback_porch;
	263	ovt->hfp = vm->hfront_porch;
	264	ovt->hsw = vm->hsync_len;
	265	ovt->y_res = vm->vactive;
	266	ovt->vbp = vm->vback_porch;
	267	ovt->vfp = vm->vfront_porch;
	268	ovt->vsw = vm->vsync_len;
	269
	270	ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ?
	271	OMAPDSS_SIG_ACTIVE_HIGH :
	272	OMAPDSS_SIG_ACTIVE_LOW;
	273	ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ?
	274	OMAPDSS_SIG_ACTIVE_HIGH :
	275	OMAPDSS_SIG_ACTIVE_LOW;
	276	ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ?
	277	OMAPDSS_SIG_ACTIVE_HIGH :
9b842a47	278	OMAPDSS_SIG_ACTIVE_LOW;
6fcd485b TV	279	ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
	280	OMAPDSS_DRIVE_SIG_RISING_EDGE :
	281	OMAPDSS_DRIVE_SIG_FALLING_EDGE;
	282
	283	ovt->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
	284	}
	285	EXPORT_SYMBOL(videomode_to_omap_video_timings);
	286
	287	void omap_video_timings_to_videomode(const struct omap_video_timings *ovt,
	288	struct videomode *vm)
	289	{
	290	memset(vm, 0, sizeof(*vm));
	291
	292	vm->pixelclock = ovt->pixel_clock * 1000;
	293
	294	vm->hactive = ovt->x_res;
	295	vm->hback_porch = ovt->hbp;
	296	vm->hfront_porch = ovt->hfp;
	297	vm->hsync_len = ovt->hsw;
	298	vm->vactive = ovt->y_res;
	299	vm->vback_porch = ovt->vbp;
	300	vm->vfront_porch = ovt->vfp;
	301	vm->vsync_len = ovt->vsw;
	302
	303	if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
	304	vm->flags \|= DISPLAY_FLAGS_HSYNC_HIGH;
	305	else
	306	vm->flags \|= DISPLAY_FLAGS_HSYNC_LOW;
	307
	308	if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH)
	309	vm->flags \|= DISPLAY_FLAGS_VSYNC_HIGH;
	310	else
	311	vm->flags \|= DISPLAY_FLAGS_VSYNC_LOW;
	312
	313	if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH)
	314	vm->flags \|= DISPLAY_FLAGS_DE_HIGH;
	315	else
	316	vm->flags \|= DISPLAY_FLAGS_DE_LOW;
	317
	318	if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE)
	319	vm->flags \|= DISPLAY_FLAGS_PIXDATA_POSEDGE;
	320	else
	321	vm->flags \|= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
	322	}
	323	EXPORT_SYMBOL(omap_video_timings_to_videomode);