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Subject: media: i2c: imx296: Replace streaming flag with runtime PM check
Author: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Date: Thu Sep 14 20:46:47 2023 +0300
The streaming flag in the driver private structure is used for the sole
purpose of gating register writes when setting a V4L2 control. This is
better handled by checking if the sensor is powered up using the runtime
PM API. Do so and drop the streaming flag.
Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Reviewed-by: Tommaso Merciai <tomm.merc...@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/i2c/imx296.c | 16 +++-------------
1 file changed, 3 insertions(+), 13 deletions(-)
---
diff --git a/drivers/media/i2c/imx296.c b/drivers/media/i2c/imx296.c
index 3b4539b622b4..94aac9d2732f 100644
--- a/drivers/media/i2c/imx296.c
+++ b/drivers/media/i2c/imx296.c
@@ -201,8 +201,6 @@ struct imx296 {
const struct imx296_clk_params *clk_params;
bool mono;
- bool streaming;
-
struct v4l2_subdev subdev;
struct media_pad pad;
@@ -321,7 +319,7 @@ static int imx296_s_ctrl(struct v4l2_ctrl *ctrl)
unsigned int vmax;
int ret = 0;
- if (!sensor->streaming)
+ if (!pm_runtime_get_if_in_use(sensor->dev))
return 0;
state = v4l2_subdev_get_locked_active_state(&sensor->subdev);
@@ -376,6 +374,8 @@ static int imx296_s_ctrl(struct v4l2_ctrl *ctrl)
break;
}
+ pm_runtime_put(sensor->dev);
+
return ret;
}
@@ -607,8 +607,6 @@ static int imx296_s_stream(struct v4l2_subdev *sd, int
enable)
pm_runtime_mark_last_busy(sensor->dev);
pm_runtime_put_autosuspend(sensor->dev);
- sensor->streaming = false;
-
goto unlock;
}
@@ -620,13 +618,6 @@ static int imx296_s_stream(struct v4l2_subdev *sd, int
enable)
if (ret < 0)
goto err_pm;
- /*
- * Set streaming to true to ensure __v4l2_ctrl_handler_setup() will set
- * the controls. The flag is reset to false further down if an error
- * occurs.
- */
- sensor->streaming = true;
-
ret = __v4l2_ctrl_handler_setup(&sensor->ctrls);
if (ret < 0)
goto err_pm;
@@ -646,7 +637,6 @@ err_pm:
* likely has no other chance to recover.
*/
pm_runtime_put_sync(sensor->dev);
- sensor->streaming = false;
goto unlock;
}
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