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author | Hans Verkuil <hans.verkuil@cisco.com> | 2015-10-28 00:50:37 -0200 |
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committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-12-18 13:48:19 -0200 |
commit | df9ecb0cad14b952a2865f8b3af86b2bbadfab45 (patch) | |
tree | a6a9501e8fc5a3a59e6e3fbf54e8e5c5559aaf23 /drivers/media/v4l2-core/videobuf2-core.c | |
parent | ecc2fe20e63a21b7db23065ff061b66fbc08e08b (diff) | |
download | op-kernel-dev-df9ecb0cad14b952a2865f8b3af86b2bbadfab45.zip op-kernel-dev-df9ecb0cad14b952a2865f8b3af86b2bbadfab45.tar.gz |
[media] vb2: drop v4l2_format argument from queue_setup
The queue_setup callback has a void pointer that is just for V4L2
and is the pointer to the v4l2_format struct that was passed to
VIDIOC_CREATE_BUFS. The idea was that drivers would use the information
from that struct to buffers suitable for the requested format.
After the vb2 split series this pointer is now a void pointer,
which is ugly, and the reality is that all existing drivers will
effectively just look at the sizeimage field of v4l2_format.
To make this more generic the queue_setup callback is changed:
the void pointer is dropped, instead if the *num_planes argument
is 0, then use the current format size, if it is non-zero, then
it contains the number of requested planes and the sizes array
contains the requested sizes. If either is unsupported, then return
-EINVAL, otherwise use the requested size(s).
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-core.c')
-rw-r--r-- | drivers/media/v4l2-core/videobuf2-core.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 33bdd81..ebce7c7 100644 --- a/drivers/media/v4l2-core/videobuf2-core.c +++ b/drivers/media/v4l2-core/videobuf2-core.c @@ -621,7 +621,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * Ask the driver how many buffers and planes per buffer it requires. * Driver also sets the size and allocator context for each plane. */ - ret = call_qop(q, queue_setup, q, NULL, &num_buffers, &num_planes, + ret = call_qop(q, queue_setup, q, &num_buffers, &num_planes, q->plane_sizes, q->alloc_ctx); if (ret) return ret; @@ -646,8 +646,15 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, */ if (!ret && allocated_buffers < num_buffers) { num_buffers = allocated_buffers; + /* + * num_planes is set by the previous queue_setup(), but since it + * signals to queue_setup() whether it is called from create_bufs() + * vs reqbufs() we zero it here to signal that queue_setup() is + * called for the reqbufs() case. + */ + num_planes = 0; - ret = call_qop(q, queue_setup, q, NULL, &num_buffers, + ret = call_qop(q, queue_setup, q, &num_buffers, &num_planes, q->plane_sizes, q->alloc_ctx); if (!ret && allocated_buffers < num_buffers) @@ -701,7 +708,8 @@ EXPORT_SYMBOL_GPL(vb2_core_reqbufs); * from vidioc_create_bufs handler in driver. */ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, - unsigned int *count, const void *parg) + unsigned int *count, unsigned requested_planes, + const unsigned requested_sizes[]) { unsigned int num_planes = 0, num_buffers, allocated_buffers; int ret; @@ -720,11 +728,16 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, num_buffers = min(*count, VB2_MAX_FRAME - q->num_buffers); + if (requested_planes && requested_sizes) { + num_planes = requested_planes; + memcpy(q->plane_sizes, requested_sizes, sizeof(q->plane_sizes)); + } + /* * Ask the driver, whether the requested number of buffers, planes per * buffer and their sizes are acceptable */ - ret = call_qop(q, queue_setup, q, parg, &num_buffers, + ret = call_qop(q, queue_setup, q, &num_buffers, &num_planes, q->plane_sizes, q->alloc_ctx); if (ret) return ret; @@ -747,7 +760,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, * q->num_buffers contains the total number of buffers, that the * queue driver has set up */ - ret = call_qop(q, queue_setup, q, parg, &num_buffers, + ret = call_qop(q, queue_setup, q, &num_buffers, &num_planes, q->plane_sizes, q->alloc_ctx); if (!ret && allocated_buffers < num_buffers) |