Re: [PATCH v6 1/8] [media] media: create a macro to get entity ID

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Mauro,

Thank you for the patch.

On Wednesday 19 August 2015 08:01:48 Mauro Carvalho Chehab wrote:
> Instead of accessing directly entity.id, let's create a macro,
> as this field will be moved into a common struct later on.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
> Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
> 
> diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
> index c55ab5029323..e429605ca2c3 100644
> --- a/drivers/media/media-device.c
> +++ b/drivers/media/media-device.c
> @@ -77,8 +77,8 @@ static struct media_entity *find_entity(struct
> media_device *mdev, u32 id) spin_lock(&mdev->lock);
> 
>  	media_device_for_each_entity(entity, mdev) {
> -		if ((entity->id == id && !next) ||
> -		    (entity->id > id && next)) {
> +		if (((media_entity_id(entity) == id) && !next) ||
> +		    ((media_entity_id(entity) > id) && next)) {
>  			spin_unlock(&mdev->lock);
>  			return entity;
>  		}
> @@ -104,7 +104,7 @@ static long media_device_enum_entities(struct
> media_device *mdev, if (ent == NULL)
>  		return -EINVAL;
> 
> -	u_ent.id = ent->id;
> +	u_ent.id = media_entity_id(ent);
>  	if (ent->name)
>  		strlcpy(u_ent.name, ent->name, sizeof(u_ent.name));
>  	u_ent.type = ent->type;
> @@ -122,7 +122,7 @@ static long media_device_enum_entities(struct
> media_device *mdev, static void media_device_kpad_to_upad(const struct
> media_pad *kpad, struct media_pad_desc *upad)
>  {
> -	upad->entity = kpad->entity->id;
> +	upad->entity = media_entity_id(kpad->entity);
>  	upad->index = kpad->index;
>  	upad->flags = kpad->flags;
>  }
> diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
> index 949e5f92cbdc..cb0ac4e0dfa5 100644
> --- a/drivers/media/media-entity.c
> +++ b/drivers/media/media-entity.c
> @@ -140,10 +140,10 @@ void media_entity_graph_walk_start(struct
> media_entity_graph *graph, graph->stack[graph->top].entity = NULL;
>  	bitmap_zero(graph->entities, MEDIA_ENTITY_ENUM_MAX_ID);
> 
> -	if (WARN_ON(entity->id >= MEDIA_ENTITY_ENUM_MAX_ID))
> +	if (WARN_ON(media_entity_id(entity) >= MEDIA_ENTITY_ENUM_MAX_ID))
>  		return;
> 
> -	__set_bit(entity->id, graph->entities);
> +	__set_bit(media_entity_id(entity), graph->entities);
>  	stack_push(graph, entity);
>  }
>  EXPORT_SYMBOL_GPL(media_entity_graph_walk_start);
> @@ -184,11 +184,11 @@ media_entity_graph_walk_next(struct media_entity_graph
> *graph)
> 
>  		/* Get the entity in the other end of the link . */
>  		next = media_entity_other(entity, link);
> -		if (WARN_ON(next->id >= MEDIA_ENTITY_ENUM_MAX_ID))
> +		if (WARN_ON(media_entity_id(next) >= MEDIA_ENTITY_ENUM_MAX_ID))
>  			return NULL;
> 
>  		/* Has the entity already been visited? */
> -		if (__test_and_set_bit(next->id, graph->entities)) {
> +		if (__test_and_set_bit(media_entity_id(next), graph->entities)) {
>  			link_top(graph)++;
>  			continue;
>  		}
> diff --git a/drivers/media/platform/vsp1/vsp1_video.c
> b/drivers/media/platform/vsp1/vsp1_video.c index 17f08973f835..debe4e539df6
> 100644
> --- a/drivers/media/platform/vsp1/vsp1_video.c
> +++ b/drivers/media/platform/vsp1/vsp1_video.c
> @@ -352,10 +352,10 @@ static int vsp1_pipeline_validate_branch(struct
> vsp1_pipeline *pipe, break;
> 
>  		/* Ensure the branch has no loop. */
> -		if (entities & (1 << entity->subdev.entity.id))
> +		if (entities & (1 << media_entity_id(&entity->subdev.entity)))
>  			return -EPIPE;
> 
> -		entities |= 1 << entity->subdev.entity.id;
> +		entities |= 1 << media_entity_id(&entity->subdev.entity);
> 
>  		/* UDS can't be chained. */
>  		if (entity->type == VSP1_ENTITY_UDS) {

I would move the modification of the vsp1 driver to Javier's patch that 
modifies the OMAP3 and OMAP4 drivers. Alternatively you could squash them into 
this patch, but I believe having a first patch that adds the inline function 
and a second patch that modifies all drivers to use it would be better.

> diff --git a/include/media/media-entity.h b/include/media/media-entity.h
> index 8b21a4d920d9..0a66fc225559 100644
> --- a/include/media/media-entity.h
> +++ b/include/media/media-entity.h
> @@ -113,6 +113,11 @@ static inline u32 media_entity_subtype(struct
> media_entity *entity) return entity->type & MEDIA_ENT_SUBTYPE_MASK;
>  }
> 
> +static inline u32 media_entity_id(struct media_entity *entity)
> +{
> +	return entity->id;
> +}
> +
>  #define MEDIA_ENTITY_ENUM_MAX_DEPTH	16
>  #define MEDIA_ENTITY_ENUM_MAX_ID	64

-- 
Regards,

Laurent Pinchart