From 2c73cfd0cfc44ffe331ccb81f6ac45fc399d9ddb Mon Sep 17 00:00:00 2001 From: Vishnu Reddy Date: Mon, 29 Dec 2025 12:01:25 +0530 Subject: [PATCH] media: iris: Prevent output buffer queuing before stream-on completes During normal playback, stream-on for input is followed by output, and only after input stream-on does actual streaming begin. However, when gst-play performs a seek, both input and output streams are stopped, and on restart, output stream-on occurs first. At this point, firmware has not yet started streaming. Queuing output buffers before the firmware begins streaming causes it to process buffers in an invalid state, leading to an error response. These buffers are returned to the driver as errors, forcing the driver into an error state and stopping playback. Fix this by deferring output buffer queuing until stream-on completes. Input buffers can still be queued before stream-on as required. Fixes: 92e007ca5ab6 ("media: iris: Add V4L2 streaming support for encoder video device") Signed-off-by: Vishnu Reddy Signed-off-by: Dikshita Agarwal Reviewed-by: Vikash Garodia Cc: stable@vger.kernel.org Signed-off-by: Bryan O'Donoghue Signed-off-by: Hans Verkuil --- drivers/media/platform/qcom/iris/iris_vb2.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/qcom/iris/iris_vb2.c b/drivers/media/platform/qcom/iris/iris_vb2.c index 139b821f7952f..bf0b8400996ec 100644 --- a/drivers/media/platform/qcom/iris/iris_vb2.c +++ b/drivers/media/platform/qcom/iris/iris_vb2.c @@ -193,10 +193,14 @@ int iris_vb2_start_streaming(struct vb2_queue *q, unsigned int count) buf_type = iris_v4l2_type_to_driver(q->type); if (inst->domain == DECODER) { - if (inst->state == IRIS_INST_STREAMING) + if (buf_type == BUF_INPUT) + ret = iris_queue_deferred_buffers(inst, BUF_INPUT); + + if (!ret && inst->state == IRIS_INST_STREAMING) { ret = iris_queue_internal_deferred_buffers(inst, BUF_DPB); - if (!ret) - ret = iris_queue_deferred_buffers(inst, buf_type); + if (!ret) + ret = iris_queue_deferred_buffers(inst, BUF_OUTPUT); + } } else { if (inst->state == IRIS_INST_STREAMING) { ret = iris_queue_deferred_buffers(inst, BUF_INPUT); -- 2.47.3