[PATCH 12/22] [media] tc358743: put lanes in STOP state before starting streaming

Philipp Zabel
2016-10-07T16:01:19Z

Without calling tc358743_set_csi from the new prepare_stream callback
(or calling tc358743_s_dv_timings or tc358743_set_fmt from userspace
after stopping the stream), the i.MX6 MIPI CSI2 input fails waiting
for lanes to enter STOP state when streaming is started again.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
drivers/media/i2c/tc358743.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
index 1e3a0dd2..dfa45d2 100644
--- a/drivers/media/i2c/tc358743.c
+++ b/drivers/media/i2c/tc358743.c
@@ -1463,6 +1463,14 @@ static int tc358743_g_mbus_config(struct v4l2_subdev *sd,
return 0;
}

+static int tc358743_prepare_stream(struct v4l2_subdev *sd)
+{
+ /* Put all lanes in PL-11 state (STOPSTATE) */
+ tc358743_set_csi(sd);
+
+ return 0;
+}
+
static int tc358743_s_stream(struct v4l2_subdev *sd, int enable)
{
enable_stream(sd, enable);
@@ -1637,6 +1645,7 @@ static const struct v4l2_subdev_video_ops tc358743_video_ops = {
.g_dv_timings = tc358743_g_dv_timings,
.query_dv_timings = tc358743_query_dv_timings,
.g_mbus_config = tc358743_g_mbus_config,
+ .prepare_stream = tc358743_prepare_stream,
.s_stream = tc358743_s_stream,
};

--
2.9.3