Hi Kieran,
Thank you for the patch.
On Friday 06 Jan 2017 12:15:30 Kieran Bingham wrote:
> When a suspend/resume action is taken, the pipeline is reset and never
> reconfigured.
>
> To correct this, we establish a new flag pipe->configured and utilise
> this to establish when we write a full configuration set to the current
> display list.
As discussed face to face, I think a better approach would be to cache the
display list instead of recomputing it a resume time. However, given that this
will require more work, I could be convinced to merge this patch in the
meantime. Let's check in a couple of weeks whether we will have moved forward
with display list caching in time for v4.12, and merge this patch otherwise.
> Signed-off-by: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
> ---
> drivers/media/platform/vsp1/vsp1_drv.c | 4 ++-
> drivers/media/platform/vsp1/vsp1_pipe.c | 1 +-
> drivers/media/platform/vsp1/vsp1_pipe.h | 2 +-
> drivers/media/platform/vsp1/vsp1_video.c | 56 ++++++++++---------------
> 4 files changed, 31 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/media/platform/vsp1/vsp1_drv.c
> b/drivers/media/platform/vsp1/vsp1_drv.c index aa237b48ad55..d596cdead1c1
> 100644
> --- a/drivers/media/platform/vsp1/vsp1_drv.c
> +++ b/drivers/media/platform/vsp1/vsp1_drv.c
> @@ -413,6 +413,7 @@ static int vsp1_create_entities(struct vsp1_device
> *vsp1)
>
> int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned int index)
> {
> + struct vsp1_rwpf *wpf = vsp1->wpf[index];
> unsigned int timeout;
> u32 status;
>
> @@ -429,6 +430,9 @@ int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned
> int index) usleep_range(1000, 2000);
> }
>
> + if (wpf->pipe)
> + wpf->pipe->configured = false;
> +
> if (!timeout) {
> dev_err(vsp1->dev, "failed to reset wpf.%u\n", index);
> return -ETIMEDOUT;
> diff --git a/drivers/media/platform/vsp1/vsp1_pipe.c
> b/drivers/media/platform/vsp1/vsp1_pipe.c index 280ba0804699..c568db193fba
> 100644
> --- a/drivers/media/platform/vsp1/vsp1_pipe.c
> +++ b/drivers/media/platform/vsp1/vsp1_pipe.c
> @@ -216,6 +216,7 @@ void vsp1_pipeline_init(struct vsp1_pipeline *pipe)
>
> INIT_LIST_HEAD(&pipe->entities);
> pipe->state = VSP1_PIPELINE_STOPPED;
> + pipe->configured = false;
> }
>
> /* Must be called with the pipe irqlock held. */
> diff --git a/drivers/media/platform/vsp1/vsp1_pipe.h
> b/drivers/media/platform/vsp1/vsp1_pipe.h index ac4ad2655551..fff122b4874d
> 100644
> --- a/drivers/media/platform/vsp1/vsp1_pipe.h
> +++ b/drivers/media/platform/vsp1/vsp1_pipe.h
> @@ -61,6 +61,7 @@ enum vsp1_pipeline_state {
> * @pipe: the media pipeline
> * @irqlock: protects the pipeline state
> * @state: current state
> + * @configured: true if the pipeline has been set up for video streaming
> * @wq: wait queue to wait for state change completion
> * @frame_end: frame end interrupt handler
> * @lock: protects the pipeline use count and stream count
> @@ -86,6 +87,7 @@ struct vsp1_pipeline {
>
> spinlock_t irqlock;
> enum vsp1_pipeline_state state;
> + bool configured;
> wait_queue_head_t wq;
>
> void (*frame_end)(struct vsp1_pipeline *pipe);
> diff --git a/drivers/media/platform/vsp1/vsp1_video.c
> b/drivers/media/platform/vsp1/vsp1_video.c index 938ecc2766ed..414303442e7c
> 100644
> --- a/drivers/media/platform/vsp1/vsp1_video.c
> +++ b/drivers/media/platform/vsp1/vsp1_video.c
> @@ -355,18 +355,14 @@ static void vsp1_video_frame_end(struct vsp1_pipeline
> *pipe, pipe->buffers_ready |= 1 << video->pipe_index;
> }
>
> -static int vsp1_video_setup_pipeline(struct vsp1_pipeline *pipe)
> +static int vsp1_video_setup_pipeline(struct vsp1_pipeline *pipe,
> + struct vsp1_dl_list *dl)
> {
> struct vsp1_entity *entity;
>
> /* Determine this pipelines sizes for image partitioning support. */
> vsp1_video_pipeline_setup_partitions(pipe);
>
> - /* Prepare the display list. */
> - pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
> - if (!pipe->dl)
> - return -ENOMEM;
> -
> if (pipe->uds) {
> struct vsp1_uds *uds = to_uds(&pipe->uds->subdev);
>
> @@ -386,13 +382,15 @@ static int vsp1_video_setup_pipeline(struct
> vsp1_pipeline *pipe) }
>
> list_for_each_entry(entity, &pipe->entities, list_pipe) {
> - vsp1_entity_route_setup(entity, pipe->dl);
> + vsp1_entity_route_setup(entity, dl);
>
> if (entity->ops->configure)
> - entity->ops->configure(entity, pipe, pipe->dl,
> + entity->ops->configure(entity, pipe, dl,
> VSP1_ENTITY_PARAMS_INIT);
> }
>
> + pipe->configured = true;
> +
> return 0;
> }
>
> @@ -415,9 +413,16 @@ static void vsp1_video_pipeline_run(struct
> vsp1_pipeline *pipe) {
> struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
> struct vsp1_entity *entity;
> + struct vsp1_dl_list *dl;
>
> - if (!pipe->dl)
> - pipe->dl = vsp1_dl_list_get(pipe->output->dlm);
> + dl = vsp1_dl_list_get(pipe->output->dlm);
> + if (!dl) {
> + dev_err(vsp1->dev, "Failed to obtain a dl list\n");
> + return;
> + }
> +
> + if (!pipe->configured)
> + vsp1_video_setup_pipeline(pipe, dl);
>
> /*
> * Start with the runtime parameters as the configure operation can
> @@ -426,45 +431,43 @@ static void vsp1_video_pipeline_run(struct
> vsp1_pipeline *pipe) */
> list_for_each_entry(entity, &pipe->entities, list_pipe) {
> if (entity->ops->configure)
> - entity->ops->configure(entity, pipe, pipe->dl,
> + entity->ops->configure(entity, pipe, dl,
> VSP1_ENTITY_PARAMS_RUNTIME);
> }
>
> /* Run the first partition */
> pipe->current_partition = 0;
> - vsp1_video_pipeline_run_partition(pipe, pipe->dl);
> + vsp1_video_pipeline_run_partition(pipe, dl);
>
> /* Process consecutive partitions as necessary */
> for (pipe->current_partition = 1;
> pipe->current_partition < pipe->partitions;
> pipe->current_partition++) {
> - struct vsp1_dl_list *dl;
> + struct vsp1_dl_list *child;
>
> /*
> * Partition configuration operations will utilise
> * the pipe->current_partition variable to determine
> * the work they should complete.
> */
> - dl = vsp1_dl_list_get(pipe->output->dlm);
> + child = vsp1_dl_list_get(pipe->output->dlm);
>
> /*
> * An incomplete chain will still function, but output only
> * the partitions that had a dl available. The frame end
> * interrupt will be marked on the last dl in the chain.
> */
> - if (!dl) {
> + if (!child) {
> dev_err(vsp1->dev, "Failed to obtain a dl list. Frame
will be
> incomplete\n"); break;
> }
>
> - vsp1_video_pipeline_run_partition(pipe, dl);
> - vsp1_dl_list_add_chain(pipe->dl, dl);
> + vsp1_video_pipeline_run_partition(pipe, child);
> + vsp1_dl_list_add_chain(dl, child);
> }
>
> /* Complete, and commit the head display list. */
> - vsp1_dl_list_commit(pipe->dl);
> - pipe->dl = NULL;
> -
> + vsp1_dl_list_commit(dl);
> vsp1_pipeline_run(pipe);
> }
>
> @@ -799,18 +802,10 @@ static int vsp1_video_start_streaming(struct vb2_queue
> *vq, unsigned int count) struct vsp1_pipeline *pipe = video->rwpf->pipe;
> bool start_pipeline = false;
> unsigned long flags;
> - int ret;
>
> mutex_lock(&pipe->lock);
> - if (pipe->stream_count == pipe->num_inputs) {
> - ret = vsp1_video_setup_pipeline(pipe);
> - if (ret < 0) {
> - mutex_unlock(&pipe->lock);
> - return ret;
> - }
> -
> + if (pipe->stream_count == pipe->num_inputs)
> start_pipeline = true;
> - }
>
> pipe->stream_count++;
> mutex_unlock(&pipe->lock);
> @@ -855,9 +850,6 @@ static void vsp1_video_stop_streaming(struct vb2_queue
> *vq) ret = vsp1_pipeline_stop(pipe);
> if (ret == -ETIMEDOUT)
> dev_err(video->vsp1->dev, "pipeline stop timeout\n");
> -
> - vsp1_dl_list_put(pipe->dl);
> - pipe->dl = NULL;
> }
> mutex_unlock(&pipe->lock);
--
Regards,
Laurent Pinchart
