media: ti: Stop direct calls to queue num_buffers field

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
future.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
CC: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Reviewed-by: Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/ti/am437x/am437x-vpfe.c

@@ -1771,9 +1771,10 @@ static int vpfe_queue_setup(struct vb2_queue *vq,
 {
 	struct vpfe_device *vpfe = vb2_get_drv_priv(vq);
 	unsigned size = vpfe->fmt.fmt.pix.sizeimage;
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
+	if (q_num_bufs + *nbuffers < 3)
+		*nbuffers = 3 - q_num_bufs;
 
 	if (*nplanes) {
 		if (sizes[0] < size)

drivers/media/platform/ti/cal/cal-video.c

@@ -603,9 +603,10 @@ static int cal_queue_setup(struct vb2_queue *vq,
 {
 	struct cal_ctx *ctx = vb2_get_drv_priv(vq);
 	unsigned int size = ctx->v_fmt.fmt.pix.sizeimage;
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
+	if (q_num_bufs + *nbuffers < 3)
+		*nbuffers = 3 - q_num_bufs;
 
 	if (*nplanes) {
 		if (sizes[0] < size)

drivers/media/platform/ti/davinci/vpif_capture.c

@@ -113,6 +113,7 @@ static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 	struct channel_obj *ch = vb2_get_drv_priv(vq);
 	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 	unsigned size = common->fmt.fmt.pix.sizeimage;
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 
 	vpif_dbg(2, debug, "vpif_buffer_setup\n");
 
@@ -122,8 +123,8 @@ static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 		size = sizes[0];
 	}
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
+	if (q_num_bufs + *nbuffers < 3)
+		*nbuffers = 3 - q_num_bufs;
 
 	*nplanes = 1;
 	sizes[0] = size;

drivers/media/platform/ti/davinci/vpif_display.c

@@ -115,6 +115,7 @@ static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 	struct channel_obj *ch = vb2_get_drv_priv(vq);
 	struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
 	unsigned size = common->fmt.fmt.pix.sizeimage;
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 
 	if (*nplanes) {
 		if (sizes[0] < size)
@@ -122,8 +123,8 @@ static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 		size = sizes[0];
 	}
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
+	if (q_num_bufs + *nbuffers < 3)
+		*nbuffers = 3 - q_num_bufs;
 
 	*nplanes = 1;
 	sizes[0] = size;

drivers/media/platform/ti/omap/omap_vout.c

@@ -944,10 +944,11 @@ static int omap_vout_vb2_queue_setup(struct vb2_queue *vq,
 				     struct device *alloc_devs[])
 {
 	struct omap_vout_device *vout = vb2_get_drv_priv(vq);
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 	int size = vout->pix.sizeimage;
 
-	if (is_rotation_enabled(vout) && vq->num_buffers + *nbufs > VRFB_NUM_BUFS) {
-		*nbufs = VRFB_NUM_BUFS - vq->num_buffers;
+	if (is_rotation_enabled(vout) && q_num_bufs + *nbufs > VRFB_NUM_BUFS) {
+		*nbufs = VRFB_NUM_BUFS - q_num_bufs;
 		if (*nbufs == 0)
 			return -EINVAL;
 	}