Subject: [PATCH v8 32/55] [media] media: use macros to check for V4L2 subdev entities

From: [email-masked] (Mauro Carvalho Chehab)
Date: Mon, 12 Oct 2015 13:00:13 -0300

Em Mon, 12 Oct 2015 18:35:05 +0300
Sakari Ailus <[email-masked]> escreveu:

> Hi Mauro,
> 
> On Sun, Oct 11, 2015 at 09:56:25PM -0300, Mauro Carvalho Chehab wrote:
> > Em Mon, 12 Oct 2015 00:07:52 +0300
> > Sakari Ailus <[email-masked]> escreveu:
> > 
> > > Hi Mauro,
> > > 
> > > On Sun, Aug 30, 2015 at 12:06:43AM -0300, Mauro Carvalho Chehab wrote:
> > > > Instead of relying on media subtype, use the new macros to detect
> > > > if an entity is a subdev or an A/V DMA entity.
> > > > 
> > > > Please note that most drivers assume that there's just AV_DMA or
> > > > V4L2 subdevs. This is not true anymore, as we've added MC support
> > > > for DVB, and there are plans to add support for ALSA and FB/DRM
> > > > too.
> > > > 
> > > > Ok, on the current pipelines supported by those drivers, just V4L
> > > > stuff are there, but, assuming that some day a pipeline that also
> > > > works with other subsystems will ever added, it is better to add
> > > > explicit checks for the AV_DMA stuff.
> > > > 
> > > > Signed-off-by: Mauro Carvalho Chehab <[email-masked]>
> > > > 
> > > > diff --git a/drivers/media/platform/exynos4-is/common.c b/drivers/media/platform/exynos4-is/common.c
> > > > index 0eb34ecb8ee4..8c9a29e0e294 100644
> > > > --- a/drivers/media/platform/exynos4-is/common.c
> > > > +++ b/drivers/media/platform/exynos4-is/common.c
> > > > @@ -22,8 +22,7 @@ struct v4l2_subdev *fimc_find_remote_sensor(struct media_entity *entity)
> > > >  	while (pad->flags & MEDIA_PAD_FL_SINK) {
> > > >  		/* source pad */
> > > >  		pad = media_entity_remote_pad(pad);
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		sd = media_entity_to_v4l2_subdev(pad->entity);
> > > > diff --git a/drivers/media/platform/exynos4-is/fimc-capture.c b/drivers/media/platform/exynos4-is/fimc-capture.c
> > > > index 0627a93b2f3b..e9810fee4c30 100644
> > > > --- a/drivers/media/platform/exynos4-is/fimc-capture.c
> > > > +++ b/drivers/media/platform/exynos4-is/fimc-capture.c
> > > > @@ -1141,8 +1141,7 @@ static int fimc_pipeline_validate(struct fimc_dev *fimc)
> > > >  			}
> > > >  		}
> > > >  
> > > > -		if (src_pad == NULL ||
> > > > -		    media_entity_type(src_pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!src_pad || !is_media_entity_v4l2_subdev(src_pad->entity))
> > > >  			break;
> > > >  
> > > >  		/* Don't call FIMC subdev operation to avoid nested locking */
> > > > @@ -1397,7 +1396,7 @@ static int fimc_link_setup(struct media_entity *entity,
> > > >  	struct fimc_vid_cap *vc = &fimc->vid_cap;
> > > >  	struct v4l2_subdev *sensor;
> > > >  
> > > > -	if (media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +	if (!is_media_entity_v4l2_subdev(remote->entity))
> > > >  		return -EINVAL;
> > > >  
> > > >  	if (WARN_ON(fimc == NULL))
> > > > diff --git a/drivers/media/platform/exynos4-is/fimc-isp-video.c b/drivers/media/platform/exynos4-is/fimc-isp-video.c
> > > > index 3d9ccbf5f10f..5fbaf5e39903 100644
> > > > --- a/drivers/media/platform/exynos4-is/fimc-isp-video.c
> > > > +++ b/drivers/media/platform/exynos4-is/fimc-isp-video.c
> > > > @@ -467,8 +467,7 @@ static int isp_video_pipeline_validate(struct fimc_isp *isp)
> > > >  
> > > >  		/* Retrieve format at the source pad */
> > > >  		pad = media_entity_remote_pad(pad);
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		sd = media_entity_to_v4l2_subdev(pad->entity);
> > > > diff --git a/drivers/media/platform/exynos4-is/fimc-lite.c b/drivers/media/platform/exynos4-is/fimc-lite.c
> > > > index b2607da4ad14..c2327147b360 100644
> > > > --- a/drivers/media/platform/exynos4-is/fimc-lite.c
> > > > +++ b/drivers/media/platform/exynos4-is/fimc-lite.c
> > > > @@ -814,8 +814,7 @@ static int fimc_pipeline_validate(struct fimc_lite *fimc)
> > > >  		}
> > > >  		/* Retrieve format at the source pad */
> > > >  		pad = media_entity_remote_pad(pad);
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		sd = media_entity_to_v4l2_subdev(pad->entity);
> > > > @@ -988,7 +987,6 @@ static int fimc_lite_link_setup(struct media_entity *entity,
> > > >  {
> > > >  	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
> > > >  	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
> > > > -	unsigned int remote_ent_type = media_entity_type(remote->entity);
> > > >  	int ret = 0;
> > > >  
> > > >  	if (WARN_ON(fimc == NULL))
> > > > @@ -1000,7 +998,7 @@ static int fimc_lite_link_setup(struct media_entity *entity,
> > > >  
> > > >  	switch (local->index) {
> > > >  	case FLITE_SD_PAD_SINK:
> > > > -		if (remote_ent_type != MEDIA_ENT_T_V4L2_SUBDEV) {
> > > > +		if (!is_media_entity_v4l2_subdev(remote->entity)) {
> > > >  			ret = -EINVAL;
> > > >  			break;
> > > >  		}
> > > > @@ -1018,7 +1016,7 @@ static int fimc_lite_link_setup(struct media_entity *entity,
> > > >  	case FLITE_SD_PAD_SOURCE_DMA:
> > > >  		if (!(flags & MEDIA_LNK_FL_ENABLED))
> > > >  			atomic_set(&fimc->out_path, FIMC_IO_NONE);
> > > > -		else if (remote_ent_type == MEDIA_ENT_T_DEVNODE)
> > > > +		else if (is_media_entity_v4l2_io(remote->entity))
> > > >  			atomic_set(&fimc->out_path, FIMC_IO_DMA);
> > > >  		else
> > > >  			ret = -EINVAL;
> > > > @@ -1027,7 +1025,7 @@ static int fimc_lite_link_setup(struct media_entity *entity,
> > > >  	case FLITE_SD_PAD_SOURCE_ISP:
> > > >  		if (!(flags & MEDIA_LNK_FL_ENABLED))
> > > >  			atomic_set(&fimc->out_path, FIMC_IO_NONE);
> > > > -		else if (remote_ent_type == MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		else if (is_media_entity_v4l2_subdev(remote->entity))
> > > >  			atomic_set(&fimc->out_path, FIMC_IO_ISP);
> > > >  		else
> > > >  			ret = -EINVAL;
> > > > diff --git a/drivers/media/platform/exynos4-is/media-dev.c b/drivers/media/platform/exynos4-is/media-dev.c
> > > > index 92dbade2fffc..4a25df9dd869 100644
> > > > --- a/drivers/media/platform/exynos4-is/media-dev.c
> > > > +++ b/drivers/media/platform/exynos4-is/media-dev.c
> > > > @@ -88,8 +88,7 @@ static void fimc_pipeline_prepare(struct fimc_pipeline *p,
> > > >  				break;
> > > >  		}
> > > >  
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  		sd = media_entity_to_v4l2_subdev(pad->entity);
> > > >  
> > > > @@ -1062,7 +1061,7 @@ static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
> > > >  	media_entity_graph_walk_start(&graph, entity);
> > > >  
> > > >  	while ((entity = media_entity_graph_walk_next(&graph))) {
> > > > -		if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
> > > > +		if (!is_media_entity_v4l2_io(entity))
> > > >  			continue;
> > > >  
> > > >  		ret  = __fimc_md_modify_pipeline(entity, enable);
> > > > @@ -1076,7 +1075,7 @@ static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
> > > >  	media_entity_graph_walk_start(&graph, entity_err);
> > > >  
> > > >  	while ((entity_err = media_entity_graph_walk_next(&graph))) {
> > > > -		if (media_entity_type(entity_err) != MEDIA_ENT_T_DEVNODE)
> > > > +		if (!is_media_entity_v4l2_io(entity_err))
> > > >  			continue;
> > > >  
> > > >  		__fimc_md_modify_pipeline(entity_err, !enable);
> > > > diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
> > > > index 69e7733d36cd..cb8ac90086c1 100644
> > > > --- a/drivers/media/platform/omap3isp/isp.c
> > > > +++ b/drivers/media/platform/omap3isp/isp.c
> > > > @@ -691,7 +691,7 @@ static int isp_pipeline_pm_use_count(struct media_entity *entity)
> > > >  	media_entity_graph_walk_start(&graph, entity);
> > > >  
> > > >  	while ((entity = media_entity_graph_walk_next(&graph))) {
> > > > -		if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
> > > > +		if (is_media_entity_v4l2_io(entity))
> > > >  			use += entity->use_count;
> > > >  	}
> > > >  
> > > > @@ -714,7 +714,7 @@ static int isp_pipeline_pm_power_one(struct media_entity *entity, int change)
> > > >  	struct v4l2_subdev *subdev;
> > > >  	int ret;
> > > >  
> > > > -	subdev = media_entity_type(entity) == MEDIA_ENT_T_V4L2_SUBDEV
> > > > +	subdev = is_media_entity_v4l2_subdev(entity)
> > > >  	       ? media_entity_to_v4l2_subdev(entity) : NULL;
> > > >  
> > > >  	if (entity->use_count == 0 && change > 0 && subdev != NULL) {
> > > > @@ -754,7 +754,7 @@ static int isp_pipeline_pm_power(struct media_entity *entity, int change)
> > > >  	media_entity_graph_walk_start(&graph, entity);
> > > >  
> > > >  	while (!ret && (entity = media_entity_graph_walk_next(&graph)))
> > > > -		if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
> > > > +		if (is_media_entity_v4l2_subdev(entity))
> > > >  			ret = isp_pipeline_pm_power_one(entity, change);
> > > >  
> > > >  	if (!ret)
> > > > @@ -764,7 +764,7 @@ static int isp_pipeline_pm_power(struct media_entity *entity, int change)
> > > >  
> > > >  	while ((first = media_entity_graph_walk_next(&graph))
> > > >  	       && first != entity)
> > > > -		if (media_entity_type(first) != MEDIA_ENT_T_DEVNODE)
> > > > +		if (is_media_entity_v4l2_subdev(first))
> > > >  			isp_pipeline_pm_power_one(first, -change);
> > > >  
> > > >  	return ret;
> > > > @@ -897,8 +897,7 @@ static int isp_pipeline_enable(struct isp_pipeline *pipe,
> > > >  			break;
> > > >  
> > > >  		pad = media_entity_remote_pad(pad);
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		entity = pad->entity;
> > > > @@ -988,8 +987,7 @@ static int isp_pipeline_disable(struct isp_pipeline *pipe)
> > > >  			break;
> > > >  
> > > >  		pad = media_entity_remote_pad(pad);
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		entity = pad->entity;
> > > > diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
> > > > index 4c367352b1f7..52843ac2a9ca 100644
> > > > --- a/drivers/media/platform/omap3isp/ispvideo.c
> > > > +++ b/drivers/media/platform/omap3isp/ispvideo.c
> > > > @@ -210,8 +210,7 @@ isp_video_remote_subdev(struct isp_video *video, u32 *pad)
> > > >  
> > > >  	remote = media_entity_remote_pad(&video->pad);
> > > >  
> > > > -	if (remote == NULL ||
> > > > -	    media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
> > > >  		return NULL;
> > > >  
> > > >  	if (pad)
> > > > @@ -243,7 +242,7 @@ static int isp_video_get_graph_data(struct isp_video *video,
> > > >  		if (entity == &video->video.entity)
> > > >  			continue;
> > > >  
> > > > -		if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
> > > > +		if (!is_media_entity_v4l2_io(entity))
> > > >  			continue;
> > > >  
> > > >  		__video = to_isp_video(media_entity_to_video_device(entity));
> > > > @@ -917,7 +916,7 @@ static int isp_video_check_external_subdevs(struct isp_video *video,
> > > >  		return -EINVAL;
> > > >  	}
> > > >  
> > > > -	if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +	if (!is_media_entity_v4l2_subdev(source))
> > > >  		return 0;
> > > >  
> > > >  	pipe->external = media_entity_to_v4l2_subdev(source);
> > > > diff --git a/drivers/media/platform/s3c-camif/camif-capture.c b/drivers/media/platform/s3c-camif/camif-capture.c
> > > > index eae667eab1b9..fb5b016cc0a1 100644
> > > > --- a/drivers/media/platform/s3c-camif/camif-capture.c
> > > > +++ b/drivers/media/platform/s3c-camif/camif-capture.c
> > > > @@ -837,7 +837,7 @@ static int camif_pipeline_validate(struct camif_dev *camif)
> > > >  
> > > >  	/* Retrieve format at the sensor subdev source pad */
> > > >  	pad = media_entity_remote_pad(&camif->pads[0]);
> > > > -	if (!pad || media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +	if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  		return -EPIPE;
> > > >  
> > > >  	src_fmt.pad = pad->index;
> > > > diff --git a/drivers/media/platform/vsp1/vsp1_video.c b/drivers/media/platform/vsp1/vsp1_video.c
> > > > index 1f94c1a54e00..f74158224b93 100644
> > > > --- a/drivers/media/platform/vsp1/vsp1_video.c
> > > > +++ b/drivers/media/platform/vsp1/vsp1_video.c
> > > > @@ -160,8 +160,7 @@ vsp1_video_remote_subdev(struct media_pad *local, u32 *pad)
> > > >  	struct media_pad *remote;
> > > >  
> > > >  	remote = media_entity_remote_pad(local);
> > > > -	if (remote == NULL ||
> > > > -	    media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
> > > >  		return NULL;
> > > >  
> > > >  	if (pad)
> > > > @@ -326,7 +325,7 @@ static int vsp1_pipeline_validate_branch(struct vsp1_pipeline *pipe,
> > > >  			return -EPIPE;
> > > >  
> > > >  		/* We've reached a video node, that shouldn't have happened. */
> > > > -		if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!is_media_entity_v4l2_subdev(pad->entity))
> > > >  			return -EPIPE;
> > > >  
> > > >  		entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
> > > > @@ -423,7 +422,7 @@ static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe,
> > > >  		struct vsp1_rwpf *rwpf;
> > > >  		struct vsp1_entity *e;
> > > >  
> > > > -		if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) {
> > > > +		if (is_media_entity_v4l2_io(entity)) {
> > > >  			pipe->num_video++;
> > > >  			continue;
> > > >  		}
> > > > @@ -692,7 +691,7 @@ void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe,
> > > >  	pad = media_entity_remote_pad(&input->pads[RWPF_PAD_SOURCE]);
> > > >  
> > > >  	while (pad) {
> > > > -		if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity));
> > > > diff --git a/drivers/media/platform/xilinx/xilinx-dma.c b/drivers/media/platform/xilinx/xilinx-dma.c
> > > > index 88cd789cdaf7..8e14841bf445 100644
> > > > --- a/drivers/media/platform/xilinx/xilinx-dma.c
> > > > +++ b/drivers/media/platform/xilinx/xilinx-dma.c
> > > > @@ -49,8 +49,7 @@ xvip_dma_remote_subdev(struct media_pad *local, u32 *pad)
> > > >  	struct media_pad *remote;
> > > >  
> > > >  	remote = media_entity_remote_pad(local);
> > > > -	if (remote == NULL ||
> > > > -	    media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
> > > >  		return NULL;
> > > >  
> > > >  	if (pad)
> > > > @@ -113,8 +112,7 @@ static int xvip_pipeline_start_stop(struct xvip_pipeline *pipe, bool start)
> > > >  			break;
> > > >  
> > > >  		pad = media_entity_remote_pad(pad);
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		entity = pad->entity;
> > > > diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
> > > > index e6e1115d8215..60da43772de9 100644
> > > > --- a/drivers/media/v4l2-core/v4l2-subdev.c
> > > > +++ b/drivers/media/v4l2-core/v4l2-subdev.c
> > > > @@ -526,7 +526,7 @@ static int
> > > >  v4l2_subdev_link_validate_get_format(struct media_pad *pad,
> > > >  				     struct v4l2_subdev_format *fmt)
> > > >  {
> > > > -	if (media_entity_type(pad->entity) == MEDIA_ENT_T_V4L2_SUBDEV) {
> > > > +	if (is_media_entity_v4l2_subdev(pad->entity)) {
> > > >  		struct v4l2_subdev *sd =
> > > >  			media_entity_to_v4l2_subdev(pad->entity);
> > > >  
> > > > diff --git a/drivers/staging/media/davinci_vpfe/vpfe_video.c b/drivers/staging/media/davinci_vpfe/vpfe_video.c
> > > > index 92573fa852a9..16763e0831f2 100644
> > > > --- a/drivers/staging/media/davinci_vpfe/vpfe_video.c
> > > > +++ b/drivers/staging/media/davinci_vpfe/vpfe_video.c
> > > > @@ -148,7 +148,7 @@ static void vpfe_prepare_pipeline(struct vpfe_video_device *video)
> > > >  	while ((entity = media_entity_graph_walk_next(&graph))) {
> > > >  		if (entity == &video->video_dev.entity)
> > > >  			continue;
> > > > -		if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
> > > > +		if ((!is_media_entity_v4l2_io(remote->entity))
> > > >  			continue;
> > > >  		far_end = to_vpfe_video(media_entity_to_video_device(entity));
> > > >  		if (far_end->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
> > > > @@ -293,7 +293,7 @@ static int vpfe_pipeline_enable(struct vpfe_pipeline *pipe)
> > > >  	media_entity_graph_walk_start(&graph, entity);
> > > >  	while ((entity = media_entity_graph_walk_next(&graph))) {
> > > >  
> > > > -		if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
> > > > +		if !is_media_entity_v4l2_subdev(entity))
> > > >  			continue;
> > > >  		subdev = media_entity_to_v4l2_subdev(entity);
> > > >  		ret = v4l2_subdev_call(subdev, video, s_stream, 1);
> > > > @@ -334,7 +334,7 @@ static int vpfe_pipeline_disable(struct vpfe_pipeline *pipe)
> > > >  
> > > >  	while ((entity = media_entity_graph_walk_next(&graph))) {
> > > >  
> > > > -		if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
> > > > +		if (!is_media_entity_v4l2_subdev(entity))
> > > >  			continue;
> > > >  		subdev = media_entity_to_v4l2_subdev(entity);
> > > >  		ret = v4l2_subdev_call(subdev, video, s_stream, 0);
> > > > diff --git a/drivers/staging/media/omap4iss/iss.c b/drivers/staging/media/omap4iss/iss.c
> > > > index 40591963b42b..44b88ff3ba83 100644
> > > > --- a/drivers/staging/media/omap4iss/iss.c
> > > > +++ b/drivers/staging/media/omap4iss/iss.c
> > > > @@ -397,7 +397,7 @@ static int iss_pipeline_pm_use_count(struct media_entity *entity)
> > > >  	media_entity_graph_walk_start(&graph, entity);
> > > >  
> > > >  	while ((entity = media_entity_graph_walk_next(&graph))) {
> > > > -		if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
> > > > +		if (is_media_entity_v4l2_io(entity))
> > > >  			use += entity->use_count;
> > > >  	}
> > > >  
> > > > @@ -419,7 +419,7 @@ static int iss_pipeline_pm_power_one(struct media_entity *entity, int change)
> > > >  {
> > > >  	struct v4l2_subdev *subdev;
> > > >  
> > > > -	subdev = media_entity_type(entity) == MEDIA_ENT_T_V4L2_SUBDEV
> > > > +	subdev = is_media_entity_v4l2_subdev(entity)
> > > >  	       ? media_entity_to_v4l2_subdev(entity) : NULL;
> > > >  
> > > >  	if (entity->use_count == 0 && change > 0 && subdev != NULL) {
> > > > @@ -461,7 +461,7 @@ static int iss_pipeline_pm_power(struct media_entity *entity, int change)
> > > >  	media_entity_graph_walk_start(&graph, entity);
> > > >  
> > > >  	while (!ret && (entity = media_entity_graph_walk_next(&graph)))
> > > > -		if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
> > > > +		if (is_media_entity_v4l2_subdev(entity))
> > > >  			ret = iss_pipeline_pm_power_one(entity, change);
> > > >  
> > > >  	if (!ret)
> > > > @@ -471,7 +471,7 @@ static int iss_pipeline_pm_power(struct media_entity *entity, int change)
> > > >  
> > > >  	while ((first = media_entity_graph_walk_next(&graph))
> > > >  	       && first != entity)
> > > > -		if (media_entity_type(first) != MEDIA_ENT_T_DEVNODE)
> > > > +		if (is_media_entity_v4l2_subdev(first))
> > > >  			iss_pipeline_pm_power_one(first, -change);
> > > >  
> > > >  	return ret;
> > > > @@ -590,8 +590,7 @@ static int iss_pipeline_disable(struct iss_pipeline *pipe,
> > > >  			break;
> > > >  
> > > >  		pad = media_entity_remote_pad(pad);
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		entity = pad->entity;
> > > > @@ -658,8 +657,7 @@ static int iss_pipeline_enable(struct iss_pipeline *pipe,
> > > >  			break;
> > > >  
> > > >  		pad = media_entity_remote_pad(pad);
> > > > -		if (pad == NULL ||
> > > > -		    media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
> > > >  			break;
> > > >  
> > > >  		entity = pad->entity;
> > > > diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c
> > > > index 45a3f2d778fc..cbe5783735dc 100644
> > > > --- a/drivers/staging/media/omap4iss/iss_video.c
> > > > +++ b/drivers/staging/media/omap4iss/iss_video.c
> > > > @@ -191,8 +191,7 @@ iss_video_remote_subdev(struct iss_video *video, u32 *pad)
> > > >  
> > > >  	remote = media_entity_remote_pad(&video->pad);
> > > >  
> > > > -	if (remote == NULL ||
> > > > -	    media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
> > > > +	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
> > > >  		return NULL;
> > > >  
> > > >  	if (pad)
> > > > @@ -217,7 +216,7 @@ iss_video_far_end(struct iss_video *video)
> > > >  		if (entity == &video->video.entity)
> > > >  			continue;
> > > >  
> > > > -		if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
> > > > +		if (!is_media_entity_v4l2_io(entity))
> > > >  			continue;
> > > >  
> > > >  		far_end = to_iss_video(media_entity_to_video_device(entity));
> > > 
> > > I finally got around to test these patches eventually, and after some
> > > debugging found this one. I think it's a good idea to have macros to
> > > determine whether an entity exposes a V4L2 sub-device interface but it
> > > should be more robust than is_media_entity_v4l2_subdev() right now is.
> > 
> > Hmm... Not sure what you're meaning... the V4L2 sub-device interface is
> > actually a separate graph object (interfaces). Those macros work at the
> > entities, not at the interface objects.
> 
> is_media_entity_v4l2_subdev() will produce wrong results for a large part of
> V4L2 sub-devices with these patches applied.
> 
> I checked again the original implementation, and it seems to be based only
> on the type as well, albeit that's a range, not a set of different
> functions.

Yes. As we're getting rid of ranges for subdevs, we need to change the
implementation. Your patch does the job by recognizing the "unknown"
subdevs.

> I suppose this will change at some point in the future: the interface indeed
> should not be determined by the function of the entity. At least it needs to
> be fixed now until the rework. I'll submit a patch for that.
> 

Thanks!

Mauro