From: Michał Krawczyk mk@semihalf.com
[ Upstream commit 50248ad9f190d527cbd578190ca769729518b703 ]
The decoder driver should clear the last_buffer_dequeued flag of the capture queue upon receiving V4L2_DEC_CMD_START.
The last_buffer_dequeued flag is set upon receiving EOS (which always happens upon receiving V4L2_DEC_CMD_STOP).
Without this patch, after issuing the V4L2_DEC_CMD_STOP and V4L2_DEC_CMD_START, the vb2_dqbuf() function will always fail, even if the buffers are completed by the hardware.
Fixes: beac82904a87 ("media: venus: make decoder compliant with stateful codec API")
Signed-off-by: Michał Krawczyk mk@semihalf.com Signed-off-by: Stanimir Varbanov stanimir.k.varbanov@gmail.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/qcom/venus/vdec.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c index 4ceaba37e2e57..9d26587716bf6 100644 --- a/drivers/media/platform/qcom/venus/vdec.c +++ b/drivers/media/platform/qcom/venus/vdec.c @@ -526,6 +526,7 @@ static int vdec_decoder_cmd(struct file *file, void *fh, struct v4l2_decoder_cmd *cmd) { struct venus_inst *inst = to_inst(file); + struct vb2_queue *dst_vq; struct hfi_frame_data fdata = {0}; int ret;
@@ -556,6 +557,13 @@ vdec_decoder_cmd(struct file *file, void *fh, struct v4l2_decoder_cmd *cmd) inst->codec_state = VENUS_DEC_STATE_DRAIN; inst->drain_active = true; } + } else if (cmd->cmd == V4L2_DEC_CMD_START && + inst->codec_state == VENUS_DEC_STATE_STOPPED) { + dst_vq = v4l2_m2m_get_vq(inst->fh.m2m_ctx, + V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE); + vb2_clear_last_buffer_dequeued(dst_vq); + + inst->codec_state = VENUS_DEC_STATE_DECODING; }
unlock: