[media] v4l: vsp1: Set the alpha value manually in RPF and WPF s_stream handlers
The RPF and WPF alpha values are set through V4L2 controls and applied
when starting the video stream by a call to v4l2_ctrl_handler_setup().
As that function uses the control handler mutex it can't be called in
interrupt context, where the VSP+DU pipeline handler might need to
reconfigure the pipeline.
Set the alpha value manually in the RPF and WPF s_stream handler to
ensure that the hardware is properly configured even when controlled
without the userspace API. If the userspace API is enabled protect that
with the control lock to avoid race conditions with userspace.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/platform/vsp1/vsp1_rwpf.h b/drivers/media/platform/vsp1/vsp1_rwpf.h
index 1a90c7c..8e82356 100644
--- a/drivers/media/platform/vsp1/vsp1_rwpf.h
+++ b/drivers/media/platform/vsp1/vsp1_rwpf.h
@@ -23,6 +23,7 @@
#define RWPF_PAD_SINK 0
#define RWPF_PAD_SOURCE 1
+struct v4l2_ctrl;
struct vsp1_rwpf;
struct vsp1_video;
@@ -40,6 +41,7 @@
struct vsp1_rwpf {
struct vsp1_entity entity;
struct v4l2_ctrl_handler ctrls;
+ struct v4l2_ctrl *alpha;
struct vsp1_video *video;