media: venus: helpers: Lock outside of buffer queue helper

After adding more logic in vdec buf_queue vb2 op it is not
practical to have two lock/unlock for one decoder buf_queue.
So move the instance lock in encoder and decoder vb2 buf_queue
operations.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/qcom/venus/helpers.c

@@ -1338,34 +1338,29 @@ void venus_helper_vb2_buf_queue(struct vb2_buffer *vb)
 	struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
 	int ret;
 
-	mutex_lock(&inst->lock);
-
 	v4l2_m2m_buf_queue(m2m_ctx, vbuf);
 
 	/* Skip processing queued capture buffers after LAST flag */
 	if (inst->session_type == VIDC_SESSION_TYPE_DEC &&
 	    V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type) &&
 	    inst->codec_state == VENUS_DEC_STATE_DRC)
-		goto unlock;
+		return;
 
 	cache_payload(inst, vb);
 
 	if (inst->session_type == VIDC_SESSION_TYPE_ENC &&
 	    !(inst->streamon_out && inst->streamon_cap))
-		goto unlock;
+		return;
 
 	if (vb2_start_streaming_called(vb->vb2_queue)) {
 		ret = is_buf_refed(inst, vbuf);
 		if (ret)
-			goto unlock;
+			return;
 
 		ret = session_process_buf(inst, vbuf);
 		if (ret)
 			return_buf_error(inst, vbuf);
 	}
-
-unlock:
-	mutex_unlock(&inst->lock);
 }
 EXPORT_SYMBOL_GPL(venus_helper_vb2_buf_queue);
 

drivers/media/platform/qcom/venus/vdec.c

@@ -1242,9 +1242,8 @@ static void vdec_vb2_buf_queue(struct vb2_buffer *vb)
 		return;
 	}
 
-	mutex_unlock(&inst->lock);
-
 	venus_helper_vb2_buf_queue(vb);
+	mutex_unlock(&inst->lock);
 }
 
 static const struct vb2_ops vdec_vb2_ops = {

drivers/media/platform/qcom/venus/venc.c

@@ -929,13 +929,22 @@ bufs_done:
 	return ret;
 }
 
+static void venc_vb2_buf_queue(struct vb2_buffer *vb)
+{
+	struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
+
+	mutex_lock(&inst->lock);
+	venus_helper_vb2_buf_queue(vb);
+	mutex_unlock(&inst->lock);
+}
+
 static const struct vb2_ops venc_vb2_ops = {
 	.queue_setup = venc_queue_setup,
 	.buf_init = venus_helper_vb2_buf_init,
 	.buf_prepare = venus_helper_vb2_buf_prepare,
 	.start_streaming = venc_start_streaming,
 	.stop_streaming = venus_helper_vb2_stop_streaming,
-	.buf_queue = venus_helper_vb2_buf_queue,
+	.buf_queue = venc_vb2_buf_queue,
 };
 
 static void venc_buf_done(struct venus_inst *inst, unsigned int buf_type,