media: amphion: 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: Ming Qian <ming.qian@nxp.com>
CC: Zhou Peng <eagle.zhou@nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/amphion/vpu_dbg.c

@@ -87,7 +87,7 @@ static int vpu_dbg_instance(struct seq_file *s, void *data)
 	num = scnprintf(str, sizeof(str),
 			"output (%2d, %2d): fmt = %c%c%c%c %d x %d, %d;",
 			vb2_is_streaming(vq),
-			vq->num_buffers,
+			vb2_get_num_buffers(vq),
 			inst->out_format.pixfmt,
 			inst->out_format.pixfmt >> 8,
 			inst->out_format.pixfmt >> 16,
@@ -111,7 +111,7 @@ static int vpu_dbg_instance(struct seq_file *s, void *data)
 	num = scnprintf(str, sizeof(str),
 			"capture(%2d, %2d): fmt = %c%c%c%c %d x %d, %d;",
 			vb2_is_streaming(vq),
-			vq->num_buffers,
+			vb2_get_num_buffers(vq),
 			inst->cap_format.pixfmt,
 			inst->cap_format.pixfmt >> 8,
 			inst->cap_format.pixfmt >> 16,
@@ -139,7 +139,7 @@ static int vpu_dbg_instance(struct seq_file *s, void *data)
 		return 0;
 
 	vq = v4l2_m2m_get_src_vq(inst->fh.m2m_ctx);
-	for (i = 0; i < vq->num_buffers; i++) {
+	for (i = 0; i < vb2_get_num_buffers(vq); i++) {
 		struct vb2_buffer *vb;
 		struct vb2_v4l2_buffer *vbuf;
 
@@ -161,7 +161,7 @@ static int vpu_dbg_instance(struct seq_file *s, void *data)
 	}
 
 	vq = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx);
-	for (i = 0; i < vq->num_buffers; i++) {
+	for (i = 0; i < vb2_get_num_buffers(vq); i++) {
 		struct vb2_buffer *vb;
 		struct vb2_v4l2_buffer *vbuf;
 

drivers/media/platform/amphion/vpu_v4l2.c

@@ -439,7 +439,7 @@ int vpu_get_num_buffers(struct vpu_inst *inst, u32 type)
 	else
 		q = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx);
 
-	return q->num_buffers;
+	return vb2_get_num_buffers(q);
 }
 
 static void vpu_m2m_device_run(void *priv)
@@ -587,7 +587,7 @@ static int vpu_vb2_start_streaming(struct vb2_queue *q, unsigned int count)
 		  fmt->sizeimage[0], fmt->bytesperline[0],
 		  fmt->sizeimage[1], fmt->bytesperline[1],
 		  fmt->sizeimage[2], fmt->bytesperline[2],
-		  q->num_buffers);
+		  vb2_get_num_buffers(q));
 	vb2_clear_last_buffer_dequeued(q);
 	ret = call_vop(inst, start, q->type);
 	if (ret)