Em Tue, 27 Oct 2015 01:01:49 +0200
Sakari Ailus <sakari.ai...@iki.fi> escreveu:
> Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Comments?
> ---
> drivers/staging/media/omap4iss/iss.c | 59
> +++++++++++++++++++-----------
> drivers/staging/media/omap4iss/iss.h | 4 +-
> drivers/staging/media/omap4iss/iss_video.c | 36 ++++++++++++++----
> drivers/staging/media/omap4iss/iss_video.h | 1 +
> 4 files changed, 70 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/staging/media/omap4iss/iss.c
> b/drivers/staging/media/omap4iss/iss.c
> index 7b0561f..ab5cba4 100644
> --- a/drivers/staging/media/omap4iss/iss.c
> +++ b/drivers/staging/media/omap4iss/iss.c
> @@ -389,14 +389,14 @@ static irqreturn_t iss_isr(int irq, void *_iss)
> *
> * Return the total number of users of all video device nodes in the
> pipeline.
> */
> -static int iss_pipeline_pm_use_count(struct media_entity *entity)
> +static int iss_pipeline_pm_use_count(struct media_entity *entity,
> + struct media_entity_graph *graph)
> {
> - struct media_entity_graph graph;
> int use = 0;
>
> - media_entity_graph_walk_start(&graph, entity);
> + media_entity_graph_walk_start(graph, entity);
>
> - while ((entity = media_entity_graph_walk_next(&graph))) {
> + while ((entity = media_entity_graph_walk_next(graph))) {
> if (is_media_entity_v4l2_io(entity))
> use += entity->use_count;
> }
> @@ -449,27 +449,27 @@ static int iss_pipeline_pm_power_one(struct
> media_entity *entity, int change)
> *
> * Return 0 on success or a negative error code on failure.
> */
> -static int iss_pipeline_pm_power(struct media_entity *entity, int change)
> +static int iss_pipeline_pm_power(struct media_entity *entity, int change,
> + struct media_entity_graph *graph)
> {
> - struct media_entity_graph graph;
> struct media_entity *first = entity;
> int ret = 0;
>
> if (!change)
> return 0;
>
> - media_entity_graph_walk_start(&graph, entity);
> + media_entity_graph_walk_start(graph, entity);
>
> - while (!ret && (entity = media_entity_graph_walk_next(&graph)))
> + while (!ret && (entity = media_entity_graph_walk_next(graph)))
> if (is_media_entity_v4l2_subdev(entity))
> ret = iss_pipeline_pm_power_one(entity, change);
>
> if (!ret)
> return 0;
>
> - media_entity_graph_walk_start(&graph, first);
> + media_entity_graph_walk_start(graph, first);
>
> - while ((first = media_entity_graph_walk_next(&graph))
> + while ((first = media_entity_graph_walk_next(graph))
> && first != entity)
> if (is_media_entity_v4l2_subdev(first))
> iss_pipeline_pm_power_one(first, -change);
> @@ -489,7 +489,8 @@ static int iss_pipeline_pm_power(struct media_entity
> *entity, int change)
> * off is assumed to never fail. No failure can occur when the use parameter
> is
> * set to 0.
> */
> -int omap4iss_pipeline_pm_use(struct media_entity *entity, int use)
> +int omap4iss_pipeline_pm_use(struct media_entity *entity, int use,
> + struct media_entity_graph *graph)
> {
> int change = use ? 1 : -1;
> int ret;
> @@ -501,7 +502,7 @@ int omap4iss_pipeline_pm_use(struct media_entity *entity,
> int use)
> WARN_ON(entity->use_count < 0);
>
> /* Apply power change to connected non-nodes. */
> - ret = iss_pipeline_pm_power(entity, change);
> + ret = iss_pipeline_pm_power(entity, change, graph);
> if (ret < 0)
> entity->use_count -= change;
>
> @@ -526,34 +527,48 @@ int omap4iss_pipeline_pm_use(struct media_entity
> *entity, int use)
> static int iss_pipeline_link_notify(struct media_link *link, u32 flags,
> unsigned int notification)
> {
> + struct media_entity_graph *graph =
> + &container_of(link->graph_obj.mdev, struct iss_device,
> + media_dev)->pm_count_graph;
> struct media_entity *source = link->source->entity;
> struct media_entity *sink = link->sink->entity;
> - int source_use = iss_pipeline_pm_use_count(source);
> - int sink_use = iss_pipeline_pm_use_count(sink);
> + int source_use;
> + int sink_use;
> int ret;
>
> + if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
> + ret = media_entity_graph_walk_init(graph,
> + link->graph_obj.mdev);
> + if (ret)
> + return ret;
> + }
> +
> + source_use = iss_pipeline_pm_use_count(source, graph);
> + sink_use = iss_pipeline_pm_use_count(sink, graph);
> +
> if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
> !(flags & MEDIA_LNK_FL_ENABLED)) {
> /* Powering off entities is assumed to never fail. */
> - iss_pipeline_pm_power(source, -sink_use);
> - iss_pipeline_pm_power(sink, -source_use);
> + iss_pipeline_pm_power(source, -sink_use, graph);
> + iss_pipeline_pm_power(sink, -source_use, graph);
> return 0;
> }
>
> if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH &&
> (flags & MEDIA_LNK_FL_ENABLED)) {
> - ret = iss_pipeline_pm_power(source, sink_use);
> + ret = iss_pipeline_pm_power(source, sink_use, graph);
> if (ret < 0)
> return ret;
>
> - ret = iss_pipeline_pm_power(sink, source_use);
> + ret = iss_pipeline_pm_power(sink, source_use, graph);
> if (ret < 0)
> - iss_pipeline_pm_power(source, -sink_use);
> -
> - return ret;
> + iss_pipeline_pm_power(source, -sink_use, graph);
> }
>
> - return 0;
> + if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH)
> + media_entity_graph_walk_cleanup(graph);
> +
> + return ret;
> }
>
> /*
> -----------------------------------------------------------------------------
> diff --git a/drivers/staging/media/omap4iss/iss.h
> b/drivers/staging/media/omap4iss/iss.h
> index 5dd0d99..ee7dc08 100644
> --- a/drivers/staging/media/omap4iss/iss.h
> +++ b/drivers/staging/media/omap4iss/iss.h
> @@ -87,6 +87,7 @@ struct iss_reg {
> struct iss_device {
> struct v4l2_device v4l2_dev;
> struct media_device media_dev;
> + struct media_entity_graph pm_count_graph;
> struct device *dev;
> u32 revision;
>
> @@ -151,7 +152,8 @@ void omap4iss_isp_subclk_enable(struct iss_device *iss,
> void omap4iss_isp_subclk_disable(struct iss_device *iss,
> enum iss_isp_subclk_resource res);
>
> -int omap4iss_pipeline_pm_use(struct media_entity *entity, int use);
> +int omap4iss_pipeline_pm_use(struct media_entity *entity, int use,
> + struct media_entity_graph *graph);
>
> int omap4iss_register_entities(struct platform_device *pdev,
> struct v4l2_device *v4l2_dev);
> diff --git a/drivers/staging/media/omap4iss/iss_video.c
> b/drivers/staging/media/omap4iss/iss_video.c
> index b56f999..6cfb65e 100644
> --- a/drivers/staging/media/omap4iss/iss_video.c
> +++ b/drivers/staging/media/omap4iss/iss_video.c
> @@ -210,6 +210,12 @@ iss_video_far_end(struct iss_video *video)
> struct iss_video *far_end = NULL;
>
> mutex_lock(&mdev->graph_mutex);
> +
> + if (media_entity_graph_walk_init(&graph, mdev)) {
> + mutex_unlock(&mdev->graph_mutex);
> + return NULL;
> + }
> +
> media_entity_graph_walk_start(&graph, entity);
>
> while ((entity = media_entity_graph_walk_next(&graph))) {
> @@ -227,6 +233,9 @@ iss_video_far_end(struct iss_video *video)
> }
>
> mutex_unlock(&mdev->graph_mutex);
> +
> + media_entity_graph_walk_cleanup(&graph);
> +
> return far_end;
> }
>
> @@ -751,7 +760,7 @@ iss_video_streamon(struct file *file, void *fh, enum
> v4l2_buf_type type)
> struct iss_video_fh *vfh = to_iss_video_fh(fh);
> struct iss_video *video = video_drvdata(file);
> struct media_entity_graph graph;
> - struct media_entity *entity;
> + struct media_entity *entity = &video->video.entity;
> enum iss_pipeline_state state;
> struct iss_pipeline *pipe;
> struct iss_video *far_end;
> @@ -779,12 +788,14 @@ iss_video_streamon(struct file *file, void *fh, enum
> v4l2_buf_type type)
> if (video->iss->pdata->set_constraints)
> video->iss->pdata->set_constraints(video->iss, true);
>
> + ret = media_entity_enum_init(&pipe->entities, &video->iss->media_dev);
> + if (ret)
> + goto err_enum_init;
> +
> ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe);
> if (ret < 0)
> goto err_media_entity_pipeline_start;
>
> - entity = &video->video.entity;
> - media_entity_graph_walk_start(&graph, entity);
> while ((entity = media_entity_graph_walk_next(&graph)))
> media_entity_enum_set(&pipe->entities, entity);
>
> @@ -858,6 +869,8 @@ iss_video_streamon(struct file *file, void *fh, enum
> v4l2_buf_type type)
>
> mutex_unlock(&video->stream_lock);
>
> + media_entity_graph_walk_cleanup(&graph);
> +
> return 0;
>
> err_omap4iss_set_stream:
> @@ -869,10 +882,11 @@ err_media_entity_pipeline_start:
> video->iss->pdata->set_constraints(video->iss, false);
> video->queue = NULL;
>
> - mutex_unlock(&video->stream_lock);
> -
> media_entity_enum_cleanup(&pipe->entities);
>
> +err_enum_init:
> + mutex_unlock(&video->stream_lock);
> +
> return ret;
> }
>
> @@ -994,7 +1008,13 @@ static int iss_video_open(struct file *file)
> goto done;
> }
>
> - ret = omap4iss_pipeline_pm_use(&video->video.entity, 1);
> + ret = media_entity_graph_walk_init(&handle->graph,
> + &video->iss->media_dev);
> + if (ret)
> + goto done;
> +
> + ret = omap4iss_pipeline_pm_use(&video->video.entity, 1,
> + &handle->graph);
> if (ret < 0) {
> omap4iss_put(video->iss);
> goto done;
> @@ -1033,6 +1053,7 @@ static int iss_video_open(struct file *file)
> done:
> if (ret < 0) {
> v4l2_fh_del(&handle->vfh);
> + media_entity_graph_walk_cleanup(&handle->graph);
> kfree(handle);
> }
>
> @@ -1048,12 +1069,13 @@ static int iss_video_release(struct file *file)
> /* Disable streaming and free the buffers queue resources. */
> iss_video_streamoff(file, vfh, video->type);
>
> - omap4iss_pipeline_pm_use(&video->video.entity, 0);
> + omap4iss_pipeline_pm_use(&video->video.entity, 0, &handle->graph);
>
> /* Release the videobuf2 queue */
> vb2_queue_release(&handle->queue);
>
> /* Release the file handle. */
> + media_entity_graph_walk_cleanup(&handle->graph);
> v4l2_fh_del(vfh);
> kfree(handle);
> file->private_data = NULL;
> diff --git a/drivers/staging/media/omap4iss/iss_video.h
> b/drivers/staging/media/omap4iss/iss_video.h
> index b5d3a96..2ba4fb9 100644
> --- a/drivers/staging/media/omap4iss/iss_video.h
> +++ b/drivers/staging/media/omap4iss/iss_video.h
> @@ -183,6 +183,7 @@ struct iss_video_fh {
> struct vb2_queue queue;
> struct v4l2_format format;
> struct v4l2_fract timeperframe;
> + struct media_entity_graph graph;
> };
>
> #define to_iss_video_fh(fh) container_of(fh, struct iss_video_fh, vfh)
--
Cheers,
Mauro
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