[PATCH v8 32/55] [media] media: use macros to check for V4L2 subdev entities
Mauro Carvalho Chehab
mchehab at osg.samsung.com
Sun Oct 11 17:56:25 PDT 2015
Em Mon, 12 Oct 2015 00:07:52 +0300
Sakari Ailus <sakari.ailus at iki.fi> 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 <mchehab at osg.samsung.com>
> >
> > 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.
> Incorrect result can have consequences from a pipeline start failure (due to
> a failure in link validation) to memory corruption as struct media_entity
> pointer is assumed to be a pointer to a field of another struct.
Yes, an incorrect result would cause pipeline failures.
> How about assigning that in V4L2 sub-device / video device registration,
> for example?
What do you mean? Could you give an example to make it clearer?
Regards,
Mauro
More information about the linux-arm-kernel
mailing list