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Subject[PATCH v2 06/11] media: marvell-ccic: use vb2_ops_wait_prepare/finish helper
Date
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.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
---
drivers/media/platform/marvell-ccic/mcam-core.c | 29 +++++--------------------
1 file changed, 5 insertions(+), 24 deletions(-)

diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c
index ce00cba..4ec29c0 100644
--- a/drivers/media/platform/marvell-ccic/mcam-core.c
+++ b/drivers/media/platform/marvell-ccic/mcam-core.c
@@ -1102,26 +1102,6 @@ static void mcam_vb_buf_queue(struct vb2_buffer *vb)
mcam_read_setup(cam);
}

-
-/*
- * vb2 uses these to release the mutex when waiting in dqbuf. I'm
- * not actually sure we need to do this (I'm not sure that vb2_dqbuf() needs
- * to be called with the mutex held), but better safe than sorry.
- */
-static void mcam_vb_wait_prepare(struct vb2_queue *vq)
-{
- struct mcam_camera *cam = vb2_get_drv_priv(vq);
-
- mutex_unlock(&cam->s_mutex);
-}
-
-static void mcam_vb_wait_finish(struct vb2_queue *vq)
-{
- struct mcam_camera *cam = vb2_get_drv_priv(vq);
-
- mutex_lock(&cam->s_mutex);
-}
-
/*
* These need to be called with the mutex held from vb2
*/
@@ -1191,8 +1171,8 @@ static const struct vb2_ops mcam_vb2_ops = {
.buf_queue = mcam_vb_buf_queue,
.start_streaming = mcam_vb_start_streaming,
.stop_streaming = mcam_vb_stop_streaming,
- .wait_prepare = mcam_vb_wait_prepare,
- .wait_finish = mcam_vb_wait_finish,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
};


@@ -1252,8 +1232,8 @@ static const struct vb2_ops mcam_vb2_sg_ops = {
.buf_cleanup = mcam_vb_sg_buf_cleanup,
.start_streaming = mcam_vb_start_streaming,
.stop_streaming = mcam_vb_stop_streaming,
- .wait_prepare = mcam_vb_wait_prepare,
- .wait_finish = mcam_vb_wait_finish,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
};

#endif /* MCAM_MODE_DMA_SG */
@@ -1265,6 +1245,7 @@ static int mcam_setup_vb2(struct mcam_camera *cam)
memset(vq, 0, sizeof(*vq));
vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
vq->drv_priv = cam;
+ vq->lock = &cam->s_mutex;
INIT_LIST_HEAD(&cam->buffers);
switch (cam->buffer_mode) {
case B_DMA_contig:
--
1.9.1


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