Re: [PATCH v2 11/11] media: usb: uvc: use vb2_ops_wait_prepare/finish helper
Hi Laurent,
Thanks for the review.
On Wed, Nov 26, 2014 at 10:59 PM, Laurent Pinchart
wrote:
> Hi Prabhakar,
>
> Thank you for the patch.
>
> On Wednesday 26 November 2014 22:42:34 Lad, Prabhakar wrote:
>> This patch drops driver specific wait_prepare() and
>> wait_finish() callbacks from vb2_ops and instead uses
>> the the helpers vb2_ops_wait_prepare/finish() provided
>> by the vb2 core, the lock member of the queue needs
>> to be initalized to a mutex so that vb2 helpers
>> vb2_ops_wait_prepare/finish() can make use of it.
>
> The queue lock field isn't initialized by the uvcvideo driver, so you can't
> use vb2_ops_wait_prepare|finish().
>
Oops not sure what happened here I just took the patch from [1]
and added commit message. anyway will post a single patch v3.
[1] https://patchwork.kernel.org/patch/5327451/
Thanks,
--Prabhakar Lad
>> Signed-off-by: Lad, Prabhakar
>> Cc: Laurent Pinchart
>> ---
>> drivers/media/usb/uvc/uvc_queue.c | 18 ++
>> 1 file changed, 2 insertions(+), 16 deletions(-)
>>
>> diff --git a/drivers/media/usb/uvc/uvc_queue.c
>> b/drivers/media/usb/uvc/uvc_queue.c index cc96072..64147b5 100644
>> --- a/drivers/media/usb/uvc/uvc_queue.c
>> +++ b/drivers/media/usb/uvc/uvc_queue.c
>> @@ -143,20 +143,6 @@ static void uvc_buffer_finish(struct vb2_buffer *vb)
>> uvc_video_clock_update(stream, >v4l2_buf, buf);
>> }
>>
>> -static void uvc_wait_prepare(struct vb2_queue *vq)
>> -{
>> - struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
>> -
>> - mutex_unlock(>mutex);
>> -}
>> -
>> -static void uvc_wait_finish(struct vb2_queue *vq)
>> -{
>> - struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
>> -
>> - mutex_lock(>mutex);
>> -}
>> -
>> static int uvc_start_streaming(struct vb2_queue *vq, unsigned int count)
>> {
>> struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
>> @@ -195,8 +181,8 @@ static struct vb2_ops uvc_queue_qops = {
>> .buf_prepare = uvc_buffer_prepare,
>> .buf_queue = uvc_buffer_queue,
>> .buf_finish = uvc_buffer_finish,
>> - .wait_prepare = uvc_wait_prepare,
>> - .wait_finish = uvc_wait_finish,
>> + .wait_prepare = vb2_ops_wait_prepare,
>> + .wait_finish = vb2_ops_wait_finish,
>> .start_streaming = uvc_start_streaming,
>> .stop_streaming = uvc_stop_streaming,
>> };
>
> --
> Regards,
>
> Laurent Pinchart
>
--
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Re: [PATCH v2 11/11] media: usb: uvc: use vb2_ops_wait_prepare/finish helper
Hi Prabhakar,
Thank you for the patch.
On Wednesday 26 November 2014 22:42:34 Lad, Prabhakar wrote:
> This patch drops driver specific wait_prepare() and
> wait_finish() callbacks from vb2_ops and instead uses
> the the helpers vb2_ops_wait_prepare/finish() provided
> by the vb2 core, the lock member of the queue needs
> to be initalized to a mutex so that vb2 helpers
> vb2_ops_wait_prepare/finish() can make use of it.
The queue lock field isn't initialized by the uvcvideo driver, so you can't
use vb2_ops_wait_prepare|finish().
> Signed-off-by: Lad, Prabhakar
> Cc: Laurent Pinchart
> ---
> drivers/media/usb/uvc/uvc_queue.c | 18 ++
> 1 file changed, 2 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_queue.c
> b/drivers/media/usb/uvc/uvc_queue.c index cc96072..64147b5 100644
> --- a/drivers/media/usb/uvc/uvc_queue.c
> +++ b/drivers/media/usb/uvc/uvc_queue.c
> @@ -143,20 +143,6 @@ static void uvc_buffer_finish(struct vb2_buffer *vb)
> uvc_video_clock_update(stream, >v4l2_buf, buf);
> }
>
> -static void uvc_wait_prepare(struct vb2_queue *vq)
> -{
> - struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
> -
> - mutex_unlock(>mutex);
> -}
> -
> -static void uvc_wait_finish(struct vb2_queue *vq)
> -{
> - struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
> -
> - mutex_lock(>mutex);
> -}
> -
> static int uvc_start_streaming(struct vb2_queue *vq, unsigned int count)
> {
> struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
> @@ -195,8 +181,8 @@ static struct vb2_ops uvc_queue_qops = {
> .buf_prepare = uvc_buffer_prepare,
> .buf_queue = uvc_buffer_queue,
> .buf_finish = uvc_buffer_finish,
> - .wait_prepare = uvc_wait_prepare,
> - .wait_finish = uvc_wait_finish,
> + .wait_prepare = vb2_ops_wait_prepare,
> + .wait_finish = vb2_ops_wait_finish,
> .start_streaming = uvc_start_streaming,
> .stop_streaming = uvc_stop_streaming,
> };
--
Regards,
Laurent Pinchart
--
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the body of a message to majord...@vger.kernel.org
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Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v2 11/11] media: usb: uvc: use vb2_ops_wait_prepare/finish helper
Hi Prabhakar,
Thank you for the patch.
On Wednesday 26 November 2014 22:42:34 Lad, Prabhakar wrote:
This patch drops driver specific wait_prepare() and
wait_finish() callbacks from vb2_ops and instead uses
the the helpers vb2_ops_wait_prepare/finish() provided
by the vb2 core, the lock member of the queue needs
to be initalized to a mutex so that vb2 helpers
vb2_ops_wait_prepare/finish() can make use of it.
The queue lock field isn't initialized by the uvcvideo driver, so you can't
use vb2_ops_wait_prepare|finish().
Signed-off-by: Lad, Prabhakar prabhakar.cse...@gmail.com
Cc: Laurent Pinchart laurent.pinch...@ideasonboard.com
---
drivers/media/usb/uvc/uvc_queue.c | 18 ++
1 file changed, 2 insertions(+), 16 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_queue.c
b/drivers/media/usb/uvc/uvc_queue.c index cc96072..64147b5 100644
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -143,20 +143,6 @@ static void uvc_buffer_finish(struct vb2_buffer *vb)
uvc_video_clock_update(stream, vb-v4l2_buf, buf);
}
-static void uvc_wait_prepare(struct vb2_queue *vq)
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-
- mutex_unlock(queue-mutex);
-}
-
-static void uvc_wait_finish(struct vb2_queue *vq)
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-
- mutex_lock(queue-mutex);
-}
-
static int uvc_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
@@ -195,8 +181,8 @@ static struct vb2_ops uvc_queue_qops = {
.buf_prepare = uvc_buffer_prepare,
.buf_queue = uvc_buffer_queue,
.buf_finish = uvc_buffer_finish,
- .wait_prepare = uvc_wait_prepare,
- .wait_finish = uvc_wait_finish,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
.start_streaming = uvc_start_streaming,
.stop_streaming = uvc_stop_streaming,
};
--
Regards,
Laurent Pinchart
--
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH v2 11/11] media: usb: uvc: use vb2_ops_wait_prepare/finish helper
Hi Laurent,
Thanks for the review.
On Wed, Nov 26, 2014 at 10:59 PM, Laurent Pinchart
laurent.pinch...@ideasonboard.com wrote:
Hi Prabhakar,
Thank you for the patch.
On Wednesday 26 November 2014 22:42:34 Lad, Prabhakar wrote:
This patch drops driver specific wait_prepare() and
wait_finish() callbacks from vb2_ops and instead uses
the the helpers vb2_ops_wait_prepare/finish() provided
by the vb2 core, the lock member of the queue needs
to be initalized to a mutex so that vb2 helpers
vb2_ops_wait_prepare/finish() can make use of it.
The queue lock field isn't initialized by the uvcvideo driver, so you can't
use vb2_ops_wait_prepare|finish().
Oops not sure what happened here I just took the patch from [1]
and added commit message. anyway will post a single patch v3.
[1] https://patchwork.kernel.org/patch/5327451/
Thanks,
--Prabhakar Lad
Signed-off-by: Lad, Prabhakar prabhakar.cse...@gmail.com
Cc: Laurent Pinchart laurent.pinch...@ideasonboard.com
---
drivers/media/usb/uvc/uvc_queue.c | 18 ++
1 file changed, 2 insertions(+), 16 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_queue.c
b/drivers/media/usb/uvc/uvc_queue.c index cc96072..64147b5 100644
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -143,20 +143,6 @@ static void uvc_buffer_finish(struct vb2_buffer *vb)
uvc_video_clock_update(stream, vb-v4l2_buf, buf);
}
-static void uvc_wait_prepare(struct vb2_queue *vq)
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-
- mutex_unlock(queue-mutex);
-}
-
-static void uvc_wait_finish(struct vb2_queue *vq)
-{
- struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
-
- mutex_lock(queue-mutex);
-}
-
static int uvc_start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct uvc_video_queue *queue = vb2_get_drv_priv(vq);
@@ -195,8 +181,8 @@ static struct vb2_ops uvc_queue_qops = {
.buf_prepare = uvc_buffer_prepare,
.buf_queue = uvc_buffer_queue,
.buf_finish = uvc_buffer_finish,
- .wait_prepare = uvc_wait_prepare,
- .wait_finish = uvc_wait_finish,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
.start_streaming = uvc_start_streaming,
.stop_streaming = uvc_stop_streaming,
};
--
Regards,
Laurent Pinchart
--
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the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
