media: staging: rkisp1: remove the 'is_streaming' field from stats and params

The params and stats entities have a field 'is_streaming'.
This field is not needed since the entities can have available
buffers only if they stream and therefore it is enough to
check if there are buffers available.
As a result, their start_stream callbacks can be removed since
they only set the 'is_streaming' field.
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/rkisp1/rkisp1-common.h

@@ -240,19 +240,17 @@ struct rkisp1_capture {
  *
  * @vnode:	  video node
  * @rkisp1:	  pointer to the rkisp1 device
- * @lock:	  locks the buffer list 'stat' and 'is_streaming'
+ * @lock:	  locks the buffer list 'stat'
  * @stat:	  queue of rkisp1_buffer
  * @vdev_fmt:	  v4l2_format of the metadata format
- * @is_streaming: device is streaming
  */
 struct rkisp1_stats {
 	struct rkisp1_vdev_node vnode;
 	struct rkisp1_device *rkisp1;
 
-	spinlock_t lock; /* locks the buffers list 'stats' and 'is_streaming' */
+	spinlock_t lock; /* locks the buffers list 'stats' */
 	struct list_head stat;
 	struct v4l2_format vdev_fmt;
-	bool is_streaming;
 };
 
 /*
@@ -260,10 +258,9 @@ struct rkisp1_stats {
  *
  * @vnode:		video node
  * @rkisp1:		pointer to the rkisp1 device
- * @config_lock:	locks the buffer list 'params' and 'is_streaming'
+ * @config_lock:	locks the buffer list 'params'
  * @params:		queue of rkisp1_buffer
  * @vdev_fmt:		v4l2_format of the metadata format
- * @is_streaming:	device is streaming
  * @quantization:	the quantization configured on the isp's src pad
  * @raw_type:		the bayer pattern on the isp video sink pad
  */
@@ -271,10 +268,9 @@ struct rkisp1_params {
 	struct rkisp1_vdev_node vnode;
 	struct rkisp1_device *rkisp1;
 
-	spinlock_t config_lock; /* locks the buffers list 'params' and 'is_streaming' */
+	spinlock_t config_lock; /* locks the buffers list 'params' */
 	struct list_head params;
 	struct v4l2_format vdev_fmt;
-	bool is_streaming;
 
 	enum v4l2_quantization quantization;
 	enum rkisp1_fmt_raw_pat_type raw_type;

drivers/staging/media/rkisp1/rkisp1-params.c

@@ -1224,10 +1224,6 @@ void rkisp1_params_isr(struct rkisp1_device *rkisp1)
 	struct rkisp1_params *params = &rkisp1->params;
 
 	spin_lock(&params->config_lock);
-	if (!params->is_streaming) {
-		spin_unlock(&params->config_lock);
-		return;
-	}
 	rkisp1_params_apply_params_cfg(params, frame_sequence);
 
 	spin_unlock(&params->config_lock);
@@ -1303,8 +1299,7 @@ static void rkisp1_params_config_parameter(struct rkisp1_params *params)
 	spin_lock_irq(&params->config_lock);
 
 	/* apply the first buffer if there is one already */
-	if (params->is_streaming)
-		rkisp1_params_apply_params_cfg(params, 0);
+	rkisp1_params_apply_params_cfg(params, 0);
 
 	spin_unlock_irq(&params->config_lock);
 }
@@ -1467,7 +1462,6 @@ static void rkisp1_params_vb2_stop_streaming(struct vb2_queue *vq)
 	 * without holding the lock
 	 */
 	spin_lock_irq(&params->config_lock);
-	params->is_streaming = false;
 	list_splice_init(&params->params, &tmp_list);
 	spin_unlock_irq(&params->config_lock);
 
@@ -1475,25 +1469,12 @@ static void rkisp1_params_vb2_stop_streaming(struct vb2_queue *vq)
 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 }
 
-static int
-rkisp1_params_vb2_start_streaming(struct vb2_queue *queue, unsigned int count)
-{
-	struct rkisp1_params *params = queue->drv_priv;
-
-	spin_lock_irq(&params->config_lock);
-	params->is_streaming = true;
-	spin_unlock_irq(&params->config_lock);
-
-	return 0;
-}
-
 static struct vb2_ops rkisp1_params_vb2_ops = {
 	.queue_setup = rkisp1_params_vb2_queue_setup,
 	.wait_prepare = vb2_ops_wait_prepare,
 	.wait_finish = vb2_ops_wait_finish,
 	.buf_queue = rkisp1_params_vb2_buf_queue,
 	.buf_prepare = rkisp1_params_vb2_buf_prepare,
-	.start_streaming = rkisp1_params_vb2_start_streaming,
 	.stop_streaming = rkisp1_params_vb2_stop_streaming,
 
 };

drivers/staging/media/rkisp1/rkisp1-stats.c

@@ -136,7 +136,6 @@ static void rkisp1_stats_vb2_stop_streaming(struct vb2_queue *vq)
 	unsigned int i;
 
 	spin_lock_irq(&stats->lock);
-	stats->is_streaming = false;
 	for (i = 0; i < RKISP1_ISP_STATS_REQ_BUFS_MAX; i++) {
 		if (list_empty(&stats->stat))
 			break;
@@ -148,18 +147,6 @@ static void rkisp1_stats_vb2_stop_streaming(struct vb2_queue *vq)
 	spin_unlock_irq(&stats->lock);
 }
 
-static int
-rkisp1_stats_vb2_start_streaming(struct vb2_queue *queue, unsigned int count)
-{
-	struct rkisp1_stats *stats = queue->drv_priv;
-
-	spin_lock_irq(&stats->lock);
-	stats->is_streaming = true;
-	spin_unlock_irq(&stats->lock);
-
-	return 0;
-}
-
 static const struct vb2_ops rkisp1_stats_vb2_ops = {
 	.queue_setup = rkisp1_stats_vb2_queue_setup,
 	.buf_queue = rkisp1_stats_vb2_buf_queue,
@@ -167,7 +154,6 @@ static const struct vb2_ops rkisp1_stats_vb2_ops = {
 	.wait_prepare = vb2_ops_wait_prepare,
 	.wait_finish = vb2_ops_wait_finish,
 	.stop_streaming = rkisp1_stats_vb2_stop_streaming,
-	.start_streaming = rkisp1_stats_vb2_start_streaming,
 };
 
 static int
@@ -355,12 +341,9 @@ void rkisp1_stats_isr(struct rkisp1_stats *stats, u32 isp_ris)
 	if (isp_mis_tmp & RKISP1_STATS_MEAS_MASK)
 		rkisp1->debug.stats_error++;
 
-	if (!stats->is_streaming)
-		goto unlock;
 	if (isp_ris & RKISP1_STATS_MEAS_MASK)
 		rkisp1_stats_send_measurement(stats, isp_ris);
 
-unlock:
 	spin_unlock(&stats->lock);
 }