Patch "media: amphion: reinit vpu if reqbufs output 0" has been added to the 6.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    media: amphion: reinit vpu if reqbufs output 0

to the 6.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     media-amphion-reinit-vpu-if-reqbufs-output-0.patch
and it can be found in the queue-6.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit c6bc8461e4d196a4407e95d909b663f126fc9ab3
Author: Ming Qian <ming.qian@xxxxxxx>
Date:   Tue Jun 13 15:48:46 2023 +0800

    media: amphion: reinit vpu if reqbufs output 0
    
    [ Upstream commit 73e3f09292a0492a3fe0f87a8170a74f12624c5e ]
    
    according to v4l2 stateful decoder document 4.5.1.3. State Machine,
    the state should change from seek to initialization
    if call VIDIOC_REQBUFS(OUTPUT, 0).
    
    so reinit the vpu decoder if reqbufs output 0
    
    Fixes: 6de8d628df6e ("media: amphion: add v4l2 m2m vpu decoder stateful driver")
    Signed-off-by: Ming Qian <ming.qian@xxxxxxx>
    Tested-by: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>
    Reviewed-by: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>
    Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/media/platform/amphion/vdec.c b/drivers/media/platform/amphion/vdec.c
index 6515f3cdb7a74..56c4deea4494d 100644
--- a/drivers/media/platform/amphion/vdec.c
+++ b/drivers/media/platform/amphion/vdec.c
@@ -1453,9 +1453,7 @@ static void vdec_release(struct vpu_inst *inst)
 {
 	if (inst->id != VPU_INST_NULL_ID)
 		vpu_trace(inst->dev, "[%d]\n", inst->id);
-	vpu_inst_lock(inst);
 	vdec_stop(inst, true);
-	vpu_inst_unlock(inst);
 }
 
 static void vdec_cleanup(struct vpu_inst *inst)
diff --git a/drivers/media/platform/amphion/vpu_v4l2.c b/drivers/media/platform/amphion/vpu_v4l2.c
index 810e93d2c954a..8c9028df3bf42 100644
--- a/drivers/media/platform/amphion/vpu_v4l2.c
+++ b/drivers/media/platform/amphion/vpu_v4l2.c
@@ -489,6 +489,11 @@ static int vpu_vb2_queue_setup(struct vb2_queue *vq,
 	for (i = 0; i < cur_fmt->mem_planes; i++)
 		psize[i] = vpu_get_fmt_plane_size(cur_fmt, i);
 
+	if (V4L2_TYPE_IS_OUTPUT(vq->type) && inst->state == VPU_CODEC_STATE_SEEK) {
+		vpu_trace(inst->dev, "reinit when VIDIOC_REQBUFS(OUTPUT, 0)\n");
+		call_void_vop(inst, release);
+	}
+
 	return 0;
 }
 
@@ -773,9 +778,9 @@ int vpu_v4l2_close(struct file *file)
 		v4l2_m2m_ctx_release(inst->fh.m2m_ctx);
 		inst->fh.m2m_ctx = NULL;
 	}
+	call_void_vop(inst, release);
 	vpu_inst_unlock(inst);
 
-	call_void_vop(inst, release);
 	vpu_inst_unregister(inst);
 	vpu_inst_put(inst);