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/*
* 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 <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:
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 int dss_suspend_device(struct device *dev, void *data)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
dssdev->activate_after_resume = false;
return 0;
}
dssdev->driver->disable(dssdev);
dssdev->activate_after_resume = true;
return 0;
}
int dss_suspend_all_devices(void)
{
int r;
struct bus_type *bus = dss_get_bus();
r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
if (r) {
/* resume all displays that were suspended */
dss_resume_all_devices();
return r;
}
return 0;
}
static int dss_resume_device(struct device *dev, void *data)
{
int r;
struct omap_dss_device *dssdev = to_dss_device(dev);
if (dssdev->activate_after_resume) {
r = dssdev->driver->enable(dssdev);
if (r)
return r;
}
dssdev->activate_after_resume = false;
return 0;
}
int dss_resume_all_devices(void)
{
struct bus_type *bus = dss_get_bus();
return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
}
static int dss_disable_device(struct device *dev, void *data)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
dssdev->driver->disable(dssdev);
return 0;
}
void dss_disable_all_devices(void)
{
struct bus_type *bus = dss_get_bus();
bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
}
void omap_dss_get_device(struct omap_dss_device *dssdev)
{
get_device(&dssdev->dev);
}
EXPORT_SYMBOL(omap_dss_get_device);
void omap_dss_put_device(struct omap_dss_device *dssdev)
{
put_device(&dssdev->dev);
}
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 device *dev;
struct device *dev_start = NULL;
struct omap_dss_device *dssdev = NULL;
int match(struct device *dev, void *data)
{
return 1;
}
if (from)
dev_start = &from->dev;
dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
if (dev)
dssdev = to_dss_device(dev);
if (from)
put_device(&from->dev);
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);
int omap_dss_start_device(struct omap_dss_device *dssdev)
{
if (!dssdev->driver) {
DSSDBG("no driver\n");
return -ENODEV;
}
if (!try_module_get(dssdev->dev.driver->owner)) {
return -ENODEV;
}
return 0;
}
EXPORT_SYMBOL(omap_dss_start_device);
void omap_dss_stop_device(struct omap_dss_device *dssdev)
{
module_put(dssdev->dev.driver->owner);
}
EXPORT_SYMBOL(omap_dss_stop_device);
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