@@ -294,7 +294,7 @@ struct rcar_csi2 {
struct v4l2_mbus_framefmt mf;
struct mutex lock;
- int stream_count;
+ int stream_count[4];
struct {
struct v4l2_async_subdev asd;
@@ -582,7 +582,7 @@ static int rcar_csi2_s_stream(struct v4l2_subdev *sd, unsigned int pad,
unsigned int stream, int enable)
{
struct rcar_csi2 *priv = sd_to_csi2(sd);
- unsigned int channel, nextpad, nextstream;
+ unsigned int i, channel, nextpad, nextstream, count = 0;
struct v4l2_subdev *nextsd;
int ret;
@@ -601,18 +601,25 @@ static int rcar_csi2_s_stream(struct v4l2_subdev *sd, unsigned int pad,
if (ret)
goto out;
- priv->stream_count += enable ? 1 : -1;
+ priv->stream_count[channel] += enable ? 1 : -1;
- if (enable && priv->stream_count == 1) {
+ for (i = 0; i < 4; i++)
+ count += priv->stream_count[i];
+
+ if (enable && count == 1) {
ret = rcar_csi2_start(priv);
if (ret)
goto out;
- ret = v4l2_subdev_call(nextsd, video, s_stream, 1);
-
- } else if (!enable && !priv->stream_count) {
+ } else if (!enable && !count) {
rcar_csi2_stop(priv);
- ret = v4l2_subdev_call(nextsd, video, s_stream, 0);
}
+
+ if (enable && priv->stream_count[channel] == 1)
+ ret = v4l2_subdev_call(nextsd, pad, s_stream, nextpad,
+ nextstream, 1);
+ else if (!enable && !priv->stream_count[channel])
+ ret = v4l2_subdev_call(nextsd, pad, s_stream, nextpad,
+ nextstream, 0);
out:
mutex_unlock(&priv->lock);
@@ -912,7 +919,9 @@ static int rcar_csi2_probe(struct platform_device *pdev)
priv->dev = &pdev->dev;
mutex_init(&priv->lock);
- priv->stream_count = 0;
+
+ for (i = 0; i < 4; i++)
+ priv->stream_count[i] = 0;
ret = rcar_csi2_parse_dt_settings(priv);
if (ret)
The R-Car CSI-2 hardware can output the same virtual channel simultaneously to more then one R-Car VIN. For this reason we need to move the usage counting from the global device to each source pad. If a source pads usage count go from 0 to 1 we need to signal that a new stream should start, likewise if it go from 1 to 0 we need to stop a stream. At the same time we don't want to start or stop the whole R-Car CSI-2 device but at the first or last stream is started. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> --- drivers/media/platform/rcar-vin/rcar-csi2.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-)