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| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2015-11-01 19:01:51 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-04-13 23:45:44 +0300 |
| commit | c9e645a534744029d5d465d9b7bfae3de9123031 (patch) | |
| tree | 650f15c4c2406e31c850d21768926c1a0839c4ad | |
| parent | 2b09ee4093e98e8eaa908554aa36a5b2ceba6e3d (diff) | |
| download | linux-c9e645a534744029d5d465d9b7bfae3de9123031.tar.xz | |
[media] v4l: vsp1: Document calling context of vsp1_pipeline_propagate_alpha()
The function can only be called from a s_stream handler as it requires a
valid display list context (due to calling vsp1_uds_set_alpha() which
writes to module registers). Document the requirement.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
| -rw-r--r-- | drivers/media/platform/vsp1/vsp1_pipe.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/media/platform/vsp1/vsp1_pipe.c b/drivers/media/platform/vsp1/vsp1_pipe.c index cb67b8f80635..a9a754e17e8d 100644 --- a/drivers/media/platform/vsp1/vsp1_pipe.c +++ b/drivers/media/platform/vsp1/vsp1_pipe.c @@ -318,6 +318,9 @@ done: * to be scaled, we disable alpha scaling when the UDS input has a fixed alpha * value. The UDS then outputs a fixed alpha value which needs to be programmed * from the input RPF alpha. + * + * This function can only be called from a subdev s_stream handler as it + * requires a valid display list context. */ void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe, struct vsp1_entity *input, |