[media] media: davinci: vpbe: add support for VIDIOC_CREATE_BUFS

this patch adds support for vidioc_create_bufs. Along side
remove unneeded member numbuffers.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

2 files changed, 7 insertions, 5 deletions

diff --git a/drivers/media/platform/davinci/vpbe_display.c b/drivers/media/platform/davinci/vpbe_display.c
index 3b607498bb48..78b9ffebc94e 100644
--- a/drivers/media/platform/davinci/vpbe_display.c
+++ b/drivers/media/platform/davinci/vpbe_display.c
@@ -244,12 +244,15 @@ vpbe_buffer_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
 
         v4l2_dbg(1, debug, &vpbe_dev->v4l2_dev, "vpbe_buffer_setup\n");
 
+        if (fmt && fmt->fmt.pix.sizeimage < layer->pix_fmt.sizeimage)
+                return -EINVAL;
+
         /* Store number of buffers allocated in numbuffer member */
-        if (*nbuffers < VPBE_DEFAULT_NUM_BUFS)
-                *nbuffers = layer->numbuffers = VPBE_DEFAULT_NUM_BUFS;
+        if (vq->num_buffers + *nbuffers < VPBE_DEFAULT_NUM_BUFS)
+                *nbuffers = VPBE_DEFAULT_NUM_BUFS - vq->num_buffers;
 
         *nplanes = 1;
-        sizes[0] = layer->pix_fmt.sizeimage;
+        sizes[0] = fmt ? fmt->fmt.pix.sizeimage : layer->pix_fmt.sizeimage;
         alloc_ctxs[0] = layer->alloc_ctx;
 
         return 0;
@@ -1241,6 +1244,7 @@ static const struct v4l2_ioctl_ops vpbe_ioctl_ops = {
         .vidioc_try_fmt_vid_out  = vpbe_display_try_fmt,
 
         .vidioc_reqbufs          = vb2_ioctl_reqbufs,
+        .vidioc_create_bufs      = vb2_ioctl_create_bufs,
         .vidioc_querybuf         = vb2_ioctl_querybuf,
         .vidioc_qbuf             = vb2_ioctl_qbuf,
         .vidioc_dqbuf            = vb2_ioctl_dqbuf,
diff --git a/include/media/davinci/vpbe_display.h b/include/media/davinci/vpbe_display.h
index 163a02b92c04..fa0247ad815f 100644
--- a/include/media/davinci/vpbe_display.h
+++ b/include/media/davinci/vpbe_display.h
@@ -70,8 +70,6 @@ struct vpbe_disp_buffer {
 
 /* vpbe display object structure */
 struct vpbe_layer {
-        /* number of buffers in fbuffers */
-        unsigned int numbuffers;
         /* Pointer to the vpbe_display */
         struct vpbe_display *disp_dev;
         /* Pointer pointing to current v4l2_buffer */