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media: platform: video-mux: propagate format from sink to source 

Propagate the v4l2_mbus_framefmt to the source pad when either a sink
pad is activated or when the format of the active sink pad changes.

Signed-off-by: Chris Lesiak <chris.lesiak@licor.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Chris Lesiak 2018-04-03 15:50:22 -04:00 committed by Mauro Carvalho Chehab
parent 65dc760bb4
commit fd32d53496
1 changed files with 15 additions and 1 deletions
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16
drivers/media/platform/video-mux.c
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@ -45,6 +45,7 @@ static int video_mux_link_setup(struct media_entity *entity,
{
struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
struct video_mux *vmux = v4l2_subdev_to_video_mux(sd);
u16 source_pad = entity->num_pads - 1;
int ret = 0;
/*
@ -74,6 +75,9 @@ static int video_mux_link_setup(struct media_entity *entity,
if (ret < 0)
goto out;
vmux->active = local->index;
/* Propagate the active format to the source */
vmux->format_mbus[source_pad] = vmux->format_mbus[vmux->active];
} else {
if (vmux->active != local->index)
goto out;
@ -162,14 +166,20 @@ static int video_mux_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_format *sdformat)
{
struct video_mux *vmux = v4l2_subdev_to_video_mux(sd);
struct v4l2_mbus_framefmt *mbusformat;
struct v4l2_mbus_framefmt *mbusformat, *source_mbusformat;
struct media_pad *pad = &vmux->pads[sdformat->pad];
u16 source_pad = sd->entity.num_pads - 1;
mbusformat = __video_mux_get_pad_format(sd, cfg, sdformat->pad,
sdformat->which);
if (!mbusformat)
return -EINVAL;
source_mbusformat = __video_mux_get_pad_format(sd, cfg, source_pad,
sdformat->which);
if (!source_mbusformat)
return -EINVAL;
mutex_lock(&vmux->lock);
/* Source pad mirrors active sink pad, no limitations on sink pads */
@ -178,6 +188,10 @@ static int video_mux_set_format(struct v4l2_subdev *sd,
*mbusformat = sdformat->format;
/* Propagate the format from an active sink to source */
if ((pad->flags & MEDIA_PAD_FL_SINK) && (pad->index == vmux->active))
*source_mbusformat = sdformat->format;
mutex_unlock(&vmux->lock);
return 0;