[v12,34/56] sample: v4l: Stop direct calls to queue num_buffers field

Commit Message

Benjamin Gaignard Oct. 17, 2023, 2:47 p.m. UTC

Use vb2_get_num_buffers() to avoid using queue num_buffers field directly.
This allows us to change how the number of buffers is computed in the
futur.

Signed-off-by: Benjamin Gaignard <[e-mail]>
---
 samples/v4l/v4l2-pci-skeleton.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Patch

diff --git a/samples/v4l/v4l2-pci-skeleton.c b/samples/v4l/v4l2-pci-skeleton.c
index a61f94db18d9..a65aa9d1e9da 100644
--- a/samples/v4l/v4l2-pci-skeleton.c
+++ b/samples/v4l/v4l2-pci-skeleton.c
@@ -155,6 +155,7 @@  static int queue_setup(struct vb2_queue *vq,
 		       unsigned int sizes[], struct device *alloc_devs[])
 {
 	struct skeleton *skel = vb2_get_drv_priv(vq);
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 
 	skel->field = skel->format.field;
 	if (skel->field == V4L2_FIELD_ALTERNATE) {
@@ -167,8 +168,8 @@  static int queue_setup(struct vb2_queue *vq,
 		skel->field = V4L2_FIELD_TOP;
 	}
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
+	if (q_num_bufs + *nbuffers < 3)
+		*nbuffers = 3 - q_num_bufs;
 
 	if (*nplanes)
 		return sizes[0] < skel->format.sizeimage ? -EINVAL : 0;