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[media] staging: v4l: omap4iss: Use the new media graph walk interface 

The media graph walk requires initialisation and cleanup soon. Update the
users to perform the soon necessary API calls.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Sakari Ailus 2015-12-16 11:32:34 -02:00 committed by Mauro Carvalho Chehab
parent 6246b2a7ad
commit 809fe79a5f
4 changed files with 70 additions and 27 deletions
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59
drivers/staging/media/omap4iss/iss.c
View File

@ -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;
}
/* -----------------------------------------------------------------------------

4
drivers/staging/media/omap4iss/iss.h
View File

@ -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);

33
drivers/staging/media/omap4iss/iss_video.c
View File

@ -209,6 +209,12 @@ 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))) {
@ -226,6 +232,9 @@ iss_video_far_end(struct iss_video *video)
}
mutex_unlock(&mdev->graph_mutex);
media_entity_graph_walk_cleanup(&graph);
return far_end;
}
@ -772,7 +781,11 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
ret = media_entity_enum_init(&pipe->ent_enum, entity->graph_obj.mdev);
if (ret)
goto err_enum_init;
goto err_graph_walk_init;
ret = media_entity_graph_walk_init(&graph, entity->graph_obj.mdev);
if (ret)
goto err_graph_walk_init;
if (video->iss->pdata->set_constraints)
video->iss->pdata->set_constraints(video->iss, true);
@ -853,6 +866,8 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
spin_unlock_irqrestore(&video->qlock, flags);
}
media_entity_graph_walk_cleanup(&graph);
mutex_unlock(&video->stream_lock);
return 0;
@ -866,9 +881,11 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
video->iss->pdata->set_constraints(video->iss, false);
video->queue = NULL;
media_entity_graph_walk_cleanup(&graph);
err_graph_walk_init:
media_entity_enum_cleanup(&pipe->ent_enum);
err_enum_init:
mutex_unlock(&video->stream_lock);
return ret;
@ -992,7 +1009,13 @@ 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;
@ -1031,6 +1054,7 @@ 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);
}
@ -1046,12 +1070,13 @@ 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;

1
drivers/staging/media/omap4iss/iss_video.h
View File

@ -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)