From df9ecb0cad14b952a2865f8b3af86b2bbadfab45 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Wed, 28 Oct 2015 00:50:37 -0200 Subject: [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 Signed-off-by: Mauro Carvalho Chehab --- Documentation/video4linux/v4l2-pci-skeleton.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) (limited to 'Documentation/video4linux') diff --git a/Documentation/video4linux/v4l2-pci-skeleton.c b/Documentation/video4linux/v4l2-pci-skeleton.c index 1c8b102a6529..79af0c041056 100644 --- a/Documentation/video4linux/v4l2-pci-skeleton.c +++ b/Documentation/video4linux/v4l2-pci-skeleton.c @@ -163,11 +163,10 @@ static irqreturn_t skeleton_irq(int irq, void *dev_id) * minimum number: many DMA engines need a minimum of 2 buffers in the * queue and you need to have another available for userspace processing. */ -static int queue_setup(struct vb2_queue *vq, const void *parg, +static int queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[]) { - const struct v4l2_format *fmt = parg; struct skeleton *skel = vb2_get_drv_priv(vq); skel->field = skel->format.field; @@ -183,12 +182,12 @@ static int queue_setup(struct vb2_queue *vq, const void *parg, if (vq->num_buffers + *nbuffers < 3) *nbuffers = 3 - vq->num_buffers; + alloc_ctxs[0] = skel->alloc_ctx; - if (fmt && fmt->fmt.pix.sizeimage < skel->format.sizeimage) - return -EINVAL; + if (*nplanes) + return sizes[0] < skel->format.sizeimage ? -EINVAL : 0; *nplanes = 1; - sizes[0] = fmt ? fmt->fmt.pix.sizeimage : skel->format.sizeimage; - alloc_ctxs[0] = skel->alloc_ctx; + sizes[0] = skel->format.sizeimage; return 0; } -- cgit v1.2.3