Re: [PATCH v2 18/22] staging: v4l: omap4iss: Use media entity enum API

[Mauro Carvalho Chehab <mchehab@osg.samsung.com>]

Em Sun, 29 Nov 2015 21:20:19 +0200
Sakari Ailus <sakari.ailus@iki.fi> escreveu:

Same note as previous patches... no description, better name for the
entity_enum vars.

> From: Sakari Ailus <sakari.ailus@linux.intel.com>
> 
> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> ---
>  drivers/staging/media/omap4iss/iss.c       | 15 +++++++++++----
>  drivers/staging/media/omap4iss/iss.h       |  4 ++--
>  drivers/staging/media/omap4iss/iss_video.c | 13 +++++++++++--
>  drivers/staging/media/omap4iss/iss_video.h |  4 ++--
>  4 files changed, 26 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/staging/media/omap4iss/iss.c b/drivers/staging/media/omap4iss/iss.c
> index c097fd5..7b0561f 100644
> --- a/drivers/staging/media/omap4iss/iss.c
> +++ b/drivers/staging/media/omap4iss/iss.c
> @@ -606,7 +606,7 @@ static int iss_pipeline_disable(struct iss_pipeline *pipe,
>  			 * crashed. Mark it as such, the ISS will be reset when
>  			 * applications will release it.
>  			 */
> -			iss->crashed |= 1U << media_entity_id(&subdev->entity);
> +			media_entity_enum_set(&iss->crashed, &subdev->entity);
>  			failure = -ETIMEDOUT;
>  		}
>  	}
> @@ -641,7 +641,7 @@ static int iss_pipeline_enable(struct iss_pipeline *pipe,
>  	 * pipeline won't start anyway (those entities would then likely fail to
>  	 * stop, making the problem worse).
>  	 */
> -	if (pipe->entities & iss->crashed)
> +	if (media_entity_enum_intersects(&pipe->entities, &iss->crashed))
>  		return -EIO;
>  
>  	spin_lock_irqsave(&pipe->lock, flags);
> @@ -761,7 +761,8 @@ static int iss_reset(struct iss_device *iss)
>  		return -ETIMEDOUT;
>  	}
>  
> -	iss->crashed = 0;
> +	media_entity_enum_zero(&iss->crashed);
> +
>  	return 0;
>  }
>  
> @@ -1090,7 +1091,7 @@ void omap4iss_put(struct iss_device *iss)
>  		 * be worth investigating whether resetting the ISP only can't
>  		 * fix the problem in some cases.
>  		 */
> -		if (iss->crashed)
> +		if (!media_entity_enum_empty(&iss->crashed))
>  			iss_reset(iss);
>  		iss_disable_clocks(iss);
>  	}
> @@ -1490,6 +1491,10 @@ static int iss_probe(struct platform_device *pdev)
>  	if (ret < 0)
>  		goto error_modules;
>  
> +	ret = media_entity_enum_init(&iss->crashed, &iss->media_dev);
> +	if (ret)
> +		goto error_entities;
> +
>  	ret = iss_create_pads_links(iss);
>  	if (ret < 0)
>  		goto error_entities;
> @@ -1500,6 +1505,7 @@ static int iss_probe(struct platform_device *pdev)
>  
>  error_entities:
>  	iss_unregister_entities(iss);
> +	media_entity_enum_cleanup(&iss->crashed);
>  error_modules:
>  	iss_cleanup_modules(iss);
>  error_iss:
> @@ -1517,6 +1523,7 @@ static int iss_remove(struct platform_device *pdev)
>  	struct iss_device *iss = platform_get_drvdata(pdev);
>  
>  	iss_unregister_entities(iss);
> +	media_entity_enum_cleanup(&iss->crashed);
>  	iss_cleanup_modules(iss);
>  
>  	return 0;
> diff --git a/drivers/staging/media/omap4iss/iss.h b/drivers/staging/media/omap4iss/iss.h
> index 35df8b4..5dd0d99 100644
> --- a/drivers/staging/media/omap4iss/iss.h
> +++ b/drivers/staging/media/omap4iss/iss.h
> @@ -82,7 +82,7 @@ struct iss_reg {
>  /*
>   * struct iss_device - ISS device structure.
>   * @syscon: Regmap for the syscon register space
> - * @crashed: Bitmask of crashed entities (indexed by entity ID)
> + * @crashed: Crashed entities
>   */
>  struct iss_device {
>  	struct v4l2_device v4l2_dev;
> @@ -101,7 +101,7 @@ struct iss_device {
>  	u64 raw_dmamask;
>  
>  	struct mutex iss_mutex;	/* For handling ref_count field */
> -	unsigned int crashed;
> +	struct media_entity_enum crashed;
>  	int has_context;
>  	int ref_count;
>  
> diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c
> index cbe5783..b56f999 100644
> --- a/drivers/staging/media/omap4iss/iss_video.c
> +++ b/drivers/staging/media/omap4iss/iss_video.c
> @@ -761,6 +761,10 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
>  	if (type != video->type)
>  		return -EINVAL;
>  
> +	ret = media_entity_enum_init(&pipe->entities, entity->graph_obj.mdev);
> +	if (ret)
> +		return ret;
> +
>  	mutex_lock(&video->stream_lock);
>  
>  	/* Start streaming on the pipeline. No link touching an entity in the
> @@ -771,7 +775,6 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
>  	pipe->external = NULL;
>  	pipe->external_rate = 0;
>  	pipe->external_bpp = 0;
> -	pipe->entities = 0;
>  
>  	if (video->iss->pdata->set_constraints)
>  		video->iss->pdata->set_constraints(video->iss, true);
> @@ -783,7 +786,7 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
>  	entity = &video->video.entity;
>  	media_entity_graph_walk_start(&graph, entity);
>  	while ((entity = media_entity_graph_walk_next(&graph)))
> -		pipe->entities |= 1 << media_entity_id(entity);
> +		media_entity_enum_set(&pipe->entities, entity);
>  
>  	/* Verify that the currently configured format matches the output of
>  	 * the connected subdev.
> @@ -854,6 +857,7 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
>  	}
>  
>  	mutex_unlock(&video->stream_lock);
> +
>  	return 0;
>  
>  err_omap4iss_set_stream:
> @@ -866,6 +870,9 @@ err_media_entity_pipeline_start:
>  	video->queue = NULL;
>  
>  	mutex_unlock(&video->stream_lock);
> +
> +	media_entity_enum_cleanup(&pipe->entities);
> +
>  	return ret;
>  }
>  
> @@ -903,6 +910,8 @@ iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type)
>  	vb2_streamoff(&vfh->queue, type);
>  	video->queue = NULL;
>  
> +	media_entity_enum_cleanup(&pipe->entities);
> +
>  	if (video->iss->pdata->set_constraints)
>  		video->iss->pdata->set_constraints(video->iss, false);
>  	media_entity_pipeline_stop(&video->video.entity);
> diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
> index f11fce2..b5d3a96 100644
> --- a/drivers/staging/media/omap4iss/iss_video.h
> +++ b/drivers/staging/media/omap4iss/iss_video.h
> @@ -77,7 +77,7 @@ enum iss_pipeline_state {
>  
>  /*
>   * struct iss_pipeline - An OMAP4 ISS hardware pipeline
> - * @entities: Bitmask of entities in the pipeline (indexed by entity ID)
> + * @entities: Entities in the pipeline
>   * @error: A hardware error occurred during capture
>   */
>  struct iss_pipeline {
> @@ -87,7 +87,7 @@ struct iss_pipeline {
>  	enum iss_pipeline_stream_state stream_state;
>  	struct iss_video *input;
>  	struct iss_video *output;
> -	unsigned int entities;
> +	struct media_entity_enum entities;
>  	atomic_t frame_number;
>  	bool do_propagation; /* of frame number */
>  	bool error;