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video: Add video_is_active function

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Add the helper function video_is_active() to test if one video device
is active.

This function can be used in board code to execute operation
only when the display is probed / really used.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-11-15 16:32:20 +01:00 committed by Patrice Chotard
parent fded97adce
commit 2e2e6d8cac
2 changed files with 21 additions and 0 deletions
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14
drivers/video/video-uclass.c
View file

@ -228,6 +228,20 @@ void video_sync_all(void)
}
}
bool video_is_active(void)
{
struct udevice *dev;
for (uclass_find_first_device(UCLASS_VIDEO, &dev);
dev;
uclass_find_next_device(&dev)) {
if (device_active(dev))
return true;
}
return false;
}
int video_get_xsize(struct udevice *dev)
{
struct video_priv *priv = dev_get_uclass_priv(dev);

7
include/video.h
View file

@ -276,6 +276,13 @@ static inline int video_sync_copy_all(struct udevice *dev)
#endif
/**
* video_is_active() - Test if one video device it active
*
* @return true if at least one video device is active, else false.
*/
bool video_is_active(void);
#ifndef CONFIG_DM_VIDEO
/* Video functions */