diff options
Diffstat (limited to 'drivers/staging/media/omap4iss')
| -rw-r--r-- | drivers/staging/media/omap4iss/iss.c | 213 | ||||
| -rw-r--r-- | drivers/staging/media/omap4iss/iss.h | 6 | ||||
| -rw-r--r-- | drivers/staging/media/omap4iss/iss_video.c | 15 | ||||
| -rw-r--r-- | drivers/staging/media/omap4iss/iss_video.h | 1 |
4 files changed, 7 insertions, 228 deletions
diff --git a/drivers/staging/media/omap4iss/iss.c b/drivers/staging/media/omap4iss/iss.c index 30b473cfb..c5a5138b3 100644 --- a/drivers/staging/media/omap4iss/iss.c +++ b/drivers/staging/media/omap4iss/iss.c @@ -363,215 +363,6 @@ static irqreturn_t iss_isr(int irq, void *_iss) } /* ----------------------------------------------------------------------------- - * Pipeline power management - * - * Entities must be powered up when part of a pipeline that contains at least - * one open video device node. - * - * To achieve this use the entity use_count field to track the number of users. - * For entities corresponding to video device nodes the use_count field stores - * the users count of the node. For entities corresponding to subdevs the - * use_count field stores the total number of users of all video device nodes - * in the pipeline. - * - * The omap4iss_pipeline_pm_use() function must be called in the open() and - * close() handlers of video device nodes. It increments or decrements the use - * count of all subdev entities in the pipeline. - * - * To react to link management on powered pipelines, the link setup notification - * callback updates the use count of all entities in the source and sink sides - * of the link. - */ - -/* - * iss_pipeline_pm_use_count - Count the number of users of a pipeline - * @entity: The entity - * - * 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, - struct media_entity_graph *graph) -{ - int use = 0; - - media_entity_graph_walk_start(graph, entity); - - while ((entity = media_entity_graph_walk_next(graph))) { - if (is_media_entity_v4l2_io(entity)) - use += entity->use_count; - } - - return use; -} - -/* - * iss_pipeline_pm_power_one - Apply power change to an entity - * @entity: The entity - * @change: Use count change - * - * Change the entity use count by @change. If the entity is a subdev update its - * power state by calling the core::s_power operation when the use count goes - * from 0 to != 0 or from != 0 to 0. - * - * Return 0 on success or a negative error code on failure. - */ -static int iss_pipeline_pm_power_one(struct media_entity *entity, int change) -{ - struct v4l2_subdev *subdev; - - subdev = is_media_entity_v4l2_subdev(entity) - ? media_entity_to_v4l2_subdev(entity) : NULL; - - if (entity->use_count == 0 && change > 0 && subdev) { - int ret; - - ret = v4l2_subdev_call(subdev, core, s_power, 1); - if (ret < 0 && ret != -ENOIOCTLCMD) - return ret; - } - - entity->use_count += change; - WARN_ON(entity->use_count < 0); - - if (entity->use_count == 0 && change < 0 && subdev) - v4l2_subdev_call(subdev, core, s_power, 0); - - return 0; -} - -/* - * iss_pipeline_pm_power - Apply power change to all entities in a pipeline - * @entity: The entity - * @change: Use count change - * - * Walk the pipeline to update the use count and the power state of all non-node - * entities. - * - * Return 0 on success or a negative error code on failure. - */ -static int iss_pipeline_pm_power(struct media_entity *entity, int change, - struct media_entity_graph *graph) -{ - struct media_entity *first = entity; - int ret = 0; - - if (!change) - return 0; - - media_entity_graph_walk_start(graph, entity); - - 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); - - while ((first = media_entity_graph_walk_next(graph)) && - first != entity) - if (is_media_entity_v4l2_subdev(first)) - iss_pipeline_pm_power_one(first, -change); - - return ret; -} - -/* - * omap4iss_pipeline_pm_use - Update the use count of an entity - * @entity: The entity - * @use: Use (1) or stop using (0) the entity - * - * Update the use count of all entities in the pipeline and power entities on or - * off accordingly. - * - * Return 0 on success or a negative error code on failure. Powering entities - * 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, - struct media_entity_graph *graph) -{ - int change = use ? 1 : -1; - int ret; - - mutex_lock(&entity->graph_obj.mdev->graph_mutex); - - /* Apply use count to node. */ - entity->use_count += change; - WARN_ON(entity->use_count < 0); - - /* Apply power change to connected non-nodes. */ - ret = iss_pipeline_pm_power(entity, change, graph); - if (ret < 0) - entity->use_count -= change; - - mutex_unlock(&entity->graph_obj.mdev->graph_mutex); - - return ret; -} - -/* - * iss_pipeline_link_notify - Link management notification callback - * @link: The link - * @flags: New link flags that will be applied - * - * React to link management on powered pipelines by updating the use count of - * all entities in the source and sink sides of the link. Entities are powered - * on or off accordingly. - * - * Return 0 on success or a negative error code on failure. Powering entities - * off is assumed to never fail. This function will not fail for disconnection - * events. - */ -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; - 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, 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, graph); - if (ret < 0) - return ret; - - ret = iss_pipeline_pm_power(sink, source_use, graph); - if (ret < 0) - iss_pipeline_pm_power(source, -sink_use, graph); - } - - if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) - media_entity_graph_walk_cleanup(graph); - - return ret; -} - -/* ----------------------------------------------------------------------------- * Pipeline stream management */ @@ -1197,7 +988,7 @@ static int iss_register_entities(struct iss_device *iss) strlcpy(iss->media_dev.model, "TI OMAP4 ISS", sizeof(iss->media_dev.model)); iss->media_dev.hw_revision = iss->revision; - iss->media_dev.link_notify = iss_pipeline_link_notify; + iss->media_dev.link_notify = v4l2_pipeline_link_notify; ret = media_device_register(&iss->media_dev); if (ret < 0) { dev_err(iss->dev, "Media device registration failed (%d)\n", @@ -1527,8 +1318,6 @@ error_modules: error_iss: omap4iss_put(iss); error: - platform_set_drvdata(pdev, NULL); - mutex_destroy(&iss->iss_mutex); return ret; diff --git a/drivers/staging/media/omap4iss/iss.h b/drivers/staging/media/omap4iss/iss.h index 05f08a3ca..760ee27da 100644 --- a/drivers/staging/media/omap4iss/iss.h +++ b/drivers/staging/media/omap4iss/iss.h @@ -15,6 +15,8 @@ #define _OMAP4_ISS_H_ #include <media/v4l2-device.h> +#include <media/v4l2-mc.h> + #include <linux/device.h> #include <linux/io.h> #include <linux/platform_device.h> @@ -87,7 +89,6 @@ 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; @@ -152,9 +153,6 @@ 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, - struct media_entity_graph *graph); - int omap4iss_register_entities(struct platform_device *pdev, struct v4l2_device *v4l2_dev); void omap4iss_unregister_entities(struct platform_device *pdev); diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c index 058233a9d..f54349bce 100644 --- a/drivers/staging/media/omap4iss/iss_video.c +++ b/drivers/staging/media/omap4iss/iss_video.c @@ -19,8 +19,10 @@ #include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/module.h> + #include <media/v4l2-dev.h> #include <media/v4l2-ioctl.h> +#include <media/v4l2-mc.h> #include "iss_video.h" #include "iss.h" @@ -1009,13 +1011,7 @@ static int iss_video_open(struct file *file) goto done; } - 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); + ret = v4l2_pipeline_pm_use(&video->video.entity, 1); if (ret < 0) { omap4iss_put(video->iss); goto done; @@ -1054,7 +1050,6 @@ 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); } @@ -1070,13 +1065,11 @@ 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, &handle->graph); + v4l2_pipeline_pm_use(&video->video.entity, 0); /* 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 34588b717..c8bd2958a 100644 --- a/drivers/staging/media/omap4iss/iss_video.h +++ b/drivers/staging/media/omap4iss/iss_video.h @@ -183,7 +183,6 @@ 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) |