[PATCH v3 3/3] media: i2c: ov02c10: Use runtime PM autosuspend to avoid brownouts

[Saikiran <bjsaikiran@gmail.com>]

On Qualcomm X1E80100 platforms, the OV02C10 sensor experiences brownouts
if power-cycled too quickly (< 2.3s) due to slow passive discharge of
regulator rails.

Implement Runtime PM Autosuspend with a delay of 1000ms. This keeps the
regulators enabled for a short duration after the device is closed,
preventing costly power-off/power-on cycles during rapid user
interactions (e.g., browser permission checks).

This aligns the driver with standard power management practices used in
other sensor drivers (e.g., ov2680) to handle platform latency
constraints.

Tested-on: Lenovo Yoga Slim 7x (Snapdragon X Elite)
Fixes: 44f8901 ("media: i2c: add OmniVision OV02C10 sensor driver")
Cc: stable@vger.kernel.org
Signed-off-by: Saikiran <bjsaikiran@gmail.com>
---
 drivers/media/i2c/ov02c10.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/ov02c10.c b/drivers/media/i2c/ov02c10.c
index ba8bbb4f433a..9f6c4e8b06cc 100644
--- a/drivers/media/i2c/ov02c10.c
+++ b/drivers/media/i2c/ov02c10.c
@@ -628,7 +628,7 @@ static int ov02c10_enable_streams(struct v4l2_subdev *sd,
 	ret = cci_write(ov02c10->regmap, OV02C10_REG_STREAM_CONTROL, 1, NULL);
 out:
 	if (ret)
-		pm_runtime_put(ov02c10->dev);
+		pm_runtime_put_autosuspend(ov02c10->dev);
 
 	return ret;
 }
@@ -640,7 +640,7 @@ static int ov02c10_disable_streams(struct v4l2_subdev *sd,
 	struct ov02c10 *ov02c10 = to_ov02c10(sd);
 
 	cci_write(ov02c10->regmap, OV02C10_REG_STREAM_CONTROL, 0, NULL);
-	pm_runtime_put(ov02c10->dev);
+	pm_runtime_put_autosuspend(ov02c10->dev);
 
 	return 0;
 }
@@ -900,6 +900,7 @@ static void ov02c10_remove(struct i2c_client *client)
 
 	v4l2_async_unregister_subdev(sd);
 	pm_runtime_disable(ov02c10->dev);
+	pm_runtime_dont_use_autosuspend(ov02c10->dev);
 	if (!pm_runtime_status_suspended(ov02c10->dev)) {
 		ov02c10_power_off(ov02c10->dev);
 		pm_runtime_set_suspended(ov02c10->dev);
@@ -983,6 +984,8 @@ static int ov02c10_probe(struct i2c_client *client)
 		goto probe_error_media_entity_cleanup;
 	}
 
+	pm_runtime_set_autosuspend_delay(ov02c10->dev, 1000);
+	pm_runtime_use_autosuspend(ov02c10->dev);
 	pm_runtime_set_active(ov02c10->dev);
 	pm_runtime_enable(ov02c10->dev);
 
-- 
2.51.0