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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 <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);
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);
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