| Message ID | ac1ad6fc9832cb922ac02eba1f916a6fb4ef97a8.1452105878.git.shuahkh@osg.samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Em Wed, 6 Jan 2016 13:26:58 -0700 Shuah Khan <shuahkh@osg.samsung.com> escreveu: > Add a new v4l_vb2q_enable_media_tuner() wrapper function > to be called from v4l2-core to enable the media tuner with > videobuf2 queue, when the calling frunction has the videobuf2 > queue and doesn't have the struct video_device associated with > the queue handy as in the case of vb2_core_streamon(). This > function simply calls v4l_enable_media_tuner() passing in the > pointer to struct video_device. > > Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> > --- > drivers/media/v4l2-core/v4l2-dev.c | 21 +++++++++++++++++++++ > include/media/v4l2-dev.h | 1 + > 2 files changed, 22 insertions(+) > > diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c > index f06da6e..9ef675a 100644 > --- a/drivers/media/v4l2-core/v4l2-dev.c > +++ b/drivers/media/v4l2-core/v4l2-dev.c > @@ -30,6 +30,7 @@ > #include <media/v4l2-common.h> > #include <media/v4l2-device.h> > #include <media/v4l2-ioctl.h> > +#include <media/videobuf2-core.h> > > #define VIDEO_NUM_DEVICES 256 > #define VIDEO_NAME "video4linux" > @@ -261,6 +262,26 @@ void v4l_disable_media_tuner(struct video_device *vdev) > } > EXPORT_SYMBOL_GPL(v4l_disable_media_tuner); > > +/** > + * v4l_vb2q_enable_media_tuner - Wrapper for v4l_enable_media_tuner() > + * @q: videobuf2 queue > + * > + * This function is intended to be called from v4l2-core > + * to enable the media tuner with videobuf2 queue, when > + * the calling frunction has the videobuf2 queue and doesn't typo: function > + * have the struct video_device associated with the > + * queue handy as in the case of vb2_core_streamon(). This > + * function simply calls v4l_enable_media_tuner() passing > + * in the pointer to struct video_device. The hole description seems confusing. I'm not seeing the light about why this is needed. > + */ > +int v4l_vb2q_enable_media_tuner(struct vb2_queue *q) > +{ > + struct v4l2_fh *fh = q->owner; > + > + return v4l_enable_media_tuner(fh->vdev); > +} > +EXPORT_SYMBOL_GPL(v4l_vb2q_enable_media_tuner); > + > /* Priority handling */ > > static inline bool prio_is_valid(enum v4l2_priority prio) > diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h > index 68999a3..1948097 100644 > --- a/include/media/v4l2-dev.h > +++ b/include/media/v4l2-dev.h > @@ -179,6 +179,7 @@ struct video_device * __must_check video_device_alloc(void); > > int v4l_enable_media_tuner(struct video_device *vdev); > void v4l_disable_media_tuner(struct video_device *vdev); > +int v4l_vb2q_enable_media_tuner(struct vb2_queue *q); Documentation? > > /* this release function frees the vdev pointer */ > void video_device_release(struct video_device *vdev); -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 01/28/2016 08:29 AM, Mauro Carvalho Chehab wrote: > Em Wed, 6 Jan 2016 13:26:58 -0700 > Shuah Khan <shuahkh@osg.samsung.com> escreveu: > >> Add a new v4l_vb2q_enable_media_tuner() wrapper function >> to be called from v4l2-core to enable the media tuner with >> videobuf2 queue, when the calling frunction has the videobuf2 >> queue and doesn't have the struct video_device associated with >> the queue handy as in the case of vb2_core_streamon(). This >> function simply calls v4l_enable_media_tuner() passing in the >> pointer to struct video_device. >> >> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> >> --- >> drivers/media/v4l2-core/v4l2-dev.c | 21 +++++++++++++++++++++ >> include/media/v4l2-dev.h | 1 + >> 2 files changed, 22 insertions(+) >> >> diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c >> index f06da6e..9ef675a 100644 >> --- a/drivers/media/v4l2-core/v4l2-dev.c >> +++ b/drivers/media/v4l2-core/v4l2-dev.c >> @@ -30,6 +30,7 @@ >> #include <media/v4l2-common.h> >> #include <media/v4l2-device.h> >> #include <media/v4l2-ioctl.h> >> +#include <media/videobuf2-core.h> >> >> #define VIDEO_NUM_DEVICES 256 >> #define VIDEO_NAME "video4linux" >> @@ -261,6 +262,26 @@ void v4l_disable_media_tuner(struct video_device *vdev) >> } >> EXPORT_SYMBOL_GPL(v4l_disable_media_tuner); >> >> +/** >> + * v4l_vb2q_enable_media_tuner - Wrapper for v4l_enable_media_tuner() >> + * @q: videobuf2 queue >> + * >> + * This function is intended to be called from v4l2-core >> + * to enable the media tuner with videobuf2 queue, when >> + * the calling frunction has the videobuf2 queue and doesn't > > typo: function ok thanks > >> + * have the struct video_device associated with the >> + * queue handy as in the case of vb2_core_streamon(). This >> + * function simply calls v4l_enable_media_tuner() passing >> + * in the pointer to struct video_device. > > The hole description seems confusing. I'm not seeing the light > about why this is needed. Sorry if the description isn't clear. During videobuf2 work, owner field in struct vb2_queue is changed from struct v4l2_fh * to void. Prior to this work, I could call v4l_enable_media_tuner(). + ret = v4l_enable_media_tuner(q->owner->vdev); + if (ret) + return ret; As you can see with the videobuf2, to be able to call v4l_enable_media_tuner() from vb2_core_streamon(), I have had to this wrapper to maintain the abstraction introduced in videobuf2 work. Hope this helps the need for this wrapper. thanks, -- Shuah > >> + */ >> +int v4l_vb2q_enable_media_tuner(struct vb2_queue *q) >> +{ >> + struct v4l2_fh *fh = q->owner; >> + >> + return v4l_enable_media_tuner(fh->vdev); >> +} >> +EXPORT_SYMBOL_GPL(v4l_vb2q_enable_media_tuner); >> + >> /* Priority handling */ >> >> static inline bool prio_is_valid(enum v4l2_priority prio) >> diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h >> index 68999a3..1948097 100644 >> --- a/include/media/v4l2-dev.h >> +++ b/include/media/v4l2-dev.h >> @@ -179,6 +179,7 @@ struct video_device * __must_check video_device_alloc(void); >> >> int v4l_enable_media_tuner(struct video_device *vdev); >> void v4l_disable_media_tuner(struct video_device *vdev); >> +int v4l_vb2q_enable_media_tuner(struct vb2_queue *q); > > Documentation? > >> >> /* this release function frees the vdev pointer */ >> void video_device_release(struct video_device *vdev);
Em Thu, 28 Jan 2016 10:31:21 -0700 Shuah Khan <shuahkh@osg.samsung.com> escreveu: > On 01/28/2016 08:29 AM, Mauro Carvalho Chehab wrote: > > Em Wed, 6 Jan 2016 13:26:58 -0700 > > Shuah Khan <shuahkh@osg.samsung.com> escreveu: > > > >> Add a new v4l_vb2q_enable_media_tuner() wrapper function > >> to be called from v4l2-core to enable the media tuner with > >> videobuf2 queue, when the calling frunction has the videobuf2 > >> queue and doesn't have the struct video_device associated with > >> the queue handy as in the case of vb2_core_streamon(). This > >> function simply calls v4l_enable_media_tuner() passing in the > >> pointer to struct video_device. > >> > >> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> > >> --- > >> drivers/media/v4l2-core/v4l2-dev.c | 21 +++++++++++++++++++++ > >> include/media/v4l2-dev.h | 1 + > >> 2 files changed, 22 insertions(+) > >> > >> diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c > >> index f06da6e..9ef675a 100644 > >> --- a/drivers/media/v4l2-core/v4l2-dev.c > >> +++ b/drivers/media/v4l2-core/v4l2-dev.c > >> @@ -30,6 +30,7 @@ > >> #include <media/v4l2-common.h> > >> #include <media/v4l2-device.h> > >> #include <media/v4l2-ioctl.h> > >> +#include <media/videobuf2-core.h> > >> > >> #define VIDEO_NUM_DEVICES 256 > >> #define VIDEO_NAME "video4linux" > >> @@ -261,6 +262,26 @@ void v4l_disable_media_tuner(struct video_device *vdev) > >> } > >> EXPORT_SYMBOL_GPL(v4l_disable_media_tuner); > >> > >> +/** > >> + * v4l_vb2q_enable_media_tuner - Wrapper for v4l_enable_media_tuner() > >> + * @q: videobuf2 queue > >> + * > >> + * This function is intended to be called from v4l2-core > >> + * to enable the media tuner with videobuf2 queue, when > >> + * the calling frunction has the videobuf2 queue and doesn't > > > > typo: function > > ok thanks > > > > >> + * have the struct video_device associated with the > >> + * queue handy as in the case of vb2_core_streamon(). This > >> + * function simply calls v4l_enable_media_tuner() passing > >> + * in the pointer to struct video_device. > > > > The hole description seems confusing. I'm not seeing the light > > about why this is needed. > > Sorry if the description isn't clear. During videobuf2 > work, owner field in struct vb2_queue is changed from > struct v4l2_fh * to void. Prior to this work, I could > call v4l_enable_media_tuner(). > > + ret = v4l_enable_media_tuner(q->owner->vdev); > + if (ret) > + return ret; > > As you can see with the videobuf2, to be able to call > v4l_enable_media_tuner() from vb2_core_streamon(), I have > had to this wrapper to maintain the abstraction introduced > in videobuf2 work. > > Hope this helps the need for this wrapper. It is clearer now. Please improve the description of the patch on the next version for us to remember ;) Regards, Mauro > > thanks, > -- Shuah > > > >> + */ > >> +int v4l_vb2q_enable_media_tuner(struct vb2_queue *q) > >> +{ > >> + struct v4l2_fh *fh = q->owner; > >> + > >> + return v4l_enable_media_tuner(fh->vdev); > >> +} > >> +EXPORT_SYMBOL_GPL(v4l_vb2q_enable_media_tuner); > >> + > >> /* Priority handling */ > >> > >> static inline bool prio_is_valid(enum v4l2_priority prio) > >> diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h > >> index 68999a3..1948097 100644 > >> --- a/include/media/v4l2-dev.h > >> +++ b/include/media/v4l2-dev.h > >> @@ -179,6 +179,7 @@ struct video_device * __must_check video_device_alloc(void); > >> > >> int v4l_enable_media_tuner(struct video_device *vdev); > >> void v4l_disable_media_tuner(struct video_device *vdev); > >> +int v4l_vb2q_enable_media_tuner(struct vb2_queue *q); > > > > Documentation? > > > >> > >> /* this release function frees the vdev pointer */ > >> void video_device_release(struct video_device *vdev); > > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index f06da6e..9ef675a 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -30,6 +30,7 @@ #include <media/v4l2-common.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> +#include <media/videobuf2-core.h> #define VIDEO_NUM_DEVICES 256 #define VIDEO_NAME "video4linux" @@ -261,6 +262,26 @@ void v4l_disable_media_tuner(struct video_device *vdev) } EXPORT_SYMBOL_GPL(v4l_disable_media_tuner); +/** + * v4l_vb2q_enable_media_tuner - Wrapper for v4l_enable_media_tuner() + * @q: videobuf2 queue + * + * This function is intended to be called from v4l2-core + * to enable the media tuner with videobuf2 queue, when + * the calling frunction has the videobuf2 queue and doesn't + * have the struct video_device associated with the + * queue handy as in the case of vb2_core_streamon(). This + * function simply calls v4l_enable_media_tuner() passing + * in the pointer to struct video_device. + */ +int v4l_vb2q_enable_media_tuner(struct vb2_queue *q) +{ + struct v4l2_fh *fh = q->owner; + + return v4l_enable_media_tuner(fh->vdev); +} +EXPORT_SYMBOL_GPL(v4l_vb2q_enable_media_tuner); + /* Priority handling */ static inline bool prio_is_valid(enum v4l2_priority prio) diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index 68999a3..1948097 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -179,6 +179,7 @@ struct video_device * __must_check video_device_alloc(void); int v4l_enable_media_tuner(struct video_device *vdev); void v4l_disable_media_tuner(struct video_device *vdev); +int v4l_vb2q_enable_media_tuner(struct vb2_queue *q); /* this release function frees the vdev pointer */ void video_device_release(struct video_device *vdev);
Add a new v4l_vb2q_enable_media_tuner() wrapper function to be called from v4l2-core to enable the media tuner with videobuf2 queue, when the calling frunction has the videobuf2 queue and doesn't have the struct video_device associated with the queue handy as in the case of vb2_core_streamon(). This function simply calls v4l_enable_media_tuner() passing in the pointer to struct video_device. Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> --- drivers/media/v4l2-core/v4l2-dev.c | 21 +++++++++++++++++++++ include/media/v4l2-dev.h | 1 + 2 files changed, 22 insertions(+)