Use the pre_streamon callback to transition the transmitter to either
LP-11 or LP-111 mode if supported by the sensor.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
since v1:
- Only check sensor capabilities if manual LP control is requested.
drivers/media/i2c/ccs/ccs-core.c | 47 ++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c
index 121cbe406fe4..5363f3bcafe3 100644
--- a/drivers/media/i2c/ccs/ccs-core.c
+++ b/drivers/media/i2c/ccs/ccs-core.c
@@ -1943,6 +1943,51 @@ static int ccs_set_stream(struct v4l2_subdev *subdev, int enable)
return rval;
}
+static int ccs_pre_streamon(struct v4l2_subdev *subdev, u32 flags)
+{
+ struct ccs_sensor *sensor = to_ccs_sensor(subdev);
+ struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
+ int rval;
+
+ if (flags & V4L2_SUBDEV_PRE_STREAMON_FL_MANUAL_LP) {
+ switch (sensor->hwcfg.csi_signalling_mode) {
+ case CCS_CSI_SIGNALING_MODE_CSI_2_DPHY:
+ if (!(CCS_LIM(sensor, PHY_CTRL_CAPABILITY_2) &
+ CCS_PHY_CTRL_CAPABILITY_2_MANUAL_LP_DPHY))
+ return -EACCES;
+ break;
+ case CCS_CSI_SIGNALING_MODE_CSI_2_CPHY:
+ if (!(CCS_LIM(sensor, PHY_CTRL_CAPABILITY_2) &
+ CCS_PHY_CTRL_CAPABILITY_2_MANUAL_LP_CPHY))
+ return -EACCES;
+ break;
+ default:
+ return -EACCES;
+ }
+ }
+
+ rval = ccs_pm_get_init(sensor);
+ if (rval)
+ return rval;
+
+ if (flags & V4L2_SUBDEV_PRE_STREAMON_FL_MANUAL_LP) {
+ rval = ccs_write(sensor, MANUAL_LP_CTRL,
+ CCS_MANUAL_LP_CTRL_ENABLE);
+ if (rval)
+ pm_runtime_put(&client->dev);
+ }
+
+ return rval;
+}
+
+static int ccs_post_streamoff(struct v4l2_subdev *subdev)
+{
+ struct ccs_sensor *sensor = to_ccs_sensor(subdev);
+ struct i2c_client *client = v4l2_get_subdevdata(&sensor->src->sd);
+
+ return pm_runtime_put(&client->dev);
+}
+
static int ccs_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
@@ -3055,6 +3100,8 @@ static int ccs_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
static const struct v4l2_subdev_video_ops ccs_video_ops = {
.s_stream = ccs_set_stream,
+ .pre_streamon = ccs_pre_streamon,
+ .post_streamoff = ccs_post_streamoff,
};
static const struct v4l2_subdev_pad_ops ccs_pad_ops = {
--
2.30.2
