linux/drivers/video/omap2/dss/display.c
Archit Taneja 6c6f510afb OMAPDSS: OVERLAY: Clean up replication checking
Replication logic for an overlay depends on the color mode in which it is
configured and the video port width of the manager it is connected to.

video port width now held in dss_lcd_mgr_config in the manager's private
data in APPLY. Use this instead of referring to the omap_dss_device connected to
the manager.

Replication is enabled in the case of TV manager, the video_port_width is set to
a default value of 24 for TV manager.

Make the replication checking an overlay function since it's more of an overlay
characteristic than a display characteristic.

Signed-off-by: Archit Taneja <archit@ti.com>
2012-06-29 16:27:59 +05:30

507 lines
11 KiB
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 <video/omapdss.h>
#include "dss.h"
#include "dss_features.h"
static ssize_t display_enabled_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
}
static ssize_t display_enabled_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
int r;
bool enabled;
r = strtobool(buf, &enabled);
if (r)
return r;
if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
if (enabled) {
r = dssdev->driver->enable(dssdev);
if (r)
return r;
} else {
dssdev->driver->disable(dssdev);
}
}
return size;
}
static ssize_t display_tear_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
return snprintf(buf, PAGE_SIZE, "%d\n",
dssdev->driver->get_te ?
dssdev->driver->get_te(dssdev) : 0);
}
static ssize_t display_tear_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
int r;
bool te;
if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
return -ENOENT;
r = strtobool(buf, &te);
if (r)
return r;
r = dssdev->driver->enable_te(dssdev, te);
if (r)
return r;
return size;
}
static ssize_t display_timings_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
struct omap_video_timings t;
if (!dssdev->driver->get_timings)
return -ENOENT;
dssdev->driver->get_timings(dssdev, &t);
return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
t.pixel_clock,
t.x_res, t.hfp, t.hbp, t.hsw,
t.y_res, t.vfp, t.vbp, t.vsw);
}
static ssize_t display_timings_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
struct omap_video_timings t = dssdev->panel.timings;
int r, found;
if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
return -ENOENT;
found = 0;
#ifdef CONFIG_OMAP2_DSS_VENC
if (strncmp("pal", buf, 3) == 0) {
t = omap_dss_pal_timings;
found = 1;
} else if (strncmp("ntsc", buf, 4) == 0) {
t = omap_dss_ntsc_timings;
found = 1;
}
#endif
if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
&t.pixel_clock,
&t.x_res, &t.hfp, &t.hbp, &t.hsw,
&t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
return -EINVAL;
r = dssdev->driver->check_timings(dssdev, &t);
if (r)
return r;
dssdev->driver->set_timings(dssdev, &t);
return size;
}
static ssize_t display_rotate_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
int rotate;
if (!dssdev->driver->get_rotate)
return -ENOENT;
rotate = dssdev->driver->get_rotate(dssdev);
return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
}
static ssize_t display_rotate_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
int rot, r;
if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
return -ENOENT;
r = kstrtoint(buf, 0, &rot);
if (r)
return r;
r = dssdev->driver->set_rotate(dssdev, rot);
if (r)
return r;
return size;
}
static ssize_t display_mirror_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
int mirror;
if (!dssdev->driver->get_mirror)
return -ENOENT;
mirror = dssdev->driver->get_mirror(dssdev);
return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
}
static ssize_t display_mirror_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
int r;
bool mirror;
if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
return -ENOENT;
r = strtobool(buf, &mirror);
if (r)
return r;
r = dssdev->driver->set_mirror(dssdev, mirror);
if (r)
return r;
return size;
}
static ssize_t display_wss_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
unsigned int wss;
if (!dssdev->driver->get_wss)
return -ENOENT;
wss = dssdev->driver->get_wss(dssdev);
return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
}
static ssize_t display_wss_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
struct omap_dss_device *dssdev = to_dss_device(dev);
u32 wss;
int r;
if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
return -ENOENT;
r = kstrtou32(buf, 0, &wss);
if (r)
return r;
if (wss > 0xfffff)
return -EINVAL;
r = dssdev->driver->set_wss(dssdev, wss);
if (r)
return r;
return size;
}
static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
display_enabled_show, display_enabled_store);
static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
display_tear_show, display_tear_store);
static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR,
display_timings_show, display_timings_store);
static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR,
display_rotate_show, display_rotate_store);
static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
display_mirror_show, display_mirror_store);
static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
display_wss_show, display_wss_store);
static struct device_attribute *display_sysfs_attrs[] = {
&dev_attr_enabled,
&dev_attr_tear_elim,
&dev_attr_timings,
&dev_attr_rotate,
&dev_attr_mirror,
&dev_attr_wss,
NULL
};
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);
void dss_init_device(struct platform_device *pdev,
struct omap_dss_device *dssdev)
{
struct device_attribute *attr;
int i;
int r;
/* create device sysfs files */
i = 0;
while ((attr = display_sysfs_attrs[i++]) != NULL) {
r = device_create_file(&dssdev->dev, attr);
if (r)
DSSERR("failed to create sysfs file\n");
}
/* create display? sysfs links */
r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
dev_name(&dssdev->dev));
if (r)
DSSERR("failed to create sysfs display link\n");
}
void dss_uninit_device(struct platform_device *pdev,
struct omap_dss_device *dssdev)
{
struct device_attribute *attr;
int i = 0;
sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
while ((attr = display_sysfs_attrs[i++]) != NULL)
device_remove_file(&dssdev->dev, attr);
if (dssdev->manager)
dssdev->manager->unset_device(dssdev->manager);
}
static int dss_suspend_device(struct device *dev, void *data)
{
int r;
struct omap_dss_device *dssdev = to_dss_device(dev);
if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
dssdev->activate_after_resume = false;
return 0;
}
if (!dssdev->driver->suspend) {
DSSERR("display '%s' doesn't implement suspend\n",
dssdev->name);
return -ENOSYS;
}
r = dssdev->driver->suspend(dssdev);
if (r)
return r;
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 && dssdev->driver->resume) {
r = dssdev->driver->resume(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);