media: ov2680: Drop is_enabled flag

With runtime-pm it is guaranteed that ov2680_power_on() and
ov2680_power_off() will always be called in a balanced way;
and the is_enabled check in ov2680_s_ctrl() can be replaced
by checking the runtime-suspend state.

So there is no more need for the is_enabled flag, remove it.

While at it also make sure that flip control changes while
suspended still lead to the bayer-order getting updated so
that get_fmt returns the correct bayer-order.
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/i2c/ov2680.c

@@ -100,7 +100,6 @@ struct ov2680_dev {
 	struct gpio_desc		*pwdn_gpio;
 	struct mutex			lock; /* protect members */
 
-	bool				is_enabled;
 	bool				is_streaming;
 
 	struct ov2680_ctrls		ctrls;
@@ -312,14 +311,9 @@ static int ov2680_stream_disable(struct ov2680_dev *sensor)
 
 static int ov2680_power_off(struct ov2680_dev *sensor)
 {
-	if (!sensor->is_enabled)
-		return 0;
-
 	clk_disable_unprepare(sensor->xvclk);
 	ov2680_power_down(sensor);
 	regulator_bulk_disable(OV2680_NUM_SUPPLIES, sensor->supplies);
-	sensor->is_enabled = false;
-
 	return 0;
 }
 
@@ -327,9 +321,6 @@ static int ov2680_power_on(struct ov2680_dev *sensor)
 {
 	int ret;
 
-	if (sensor->is_enabled)
-		return 0;
-
 	ret = regulator_bulk_enable(OV2680_NUM_SUPPLIES, sensor->supplies);
 	if (ret < 0) {
 		dev_err(sensor->dev, "failed to enable regulators: %d\n", ret);
@@ -353,8 +344,6 @@ static int ov2680_power_on(struct ov2680_dev *sensor)
 	if (ret < 0)
 		goto err_disable_regulators;
 
-	sensor->is_enabled = true;
-
 	return 0;
 
 err_disable_regulators:
@@ -541,26 +530,37 @@ static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
 	struct ov2680_dev *sensor = to_ov2680_dev(sd);
+	int ret;
 
-	if (!sensor->is_enabled)
+	/* Only apply changes to the controls if the device is powered up */
+	if (!pm_runtime_get_if_in_use(sensor->sd.dev)) {
+		ov2680_set_bayer_order(sensor, &sensor->fmt);
 		return 0;
+	}
 
 	switch (ctrl->id) {
 	case V4L2_CID_GAIN:
-		return ov2680_gain_set(sensor, ctrl->val);
+		ret = ov2680_gain_set(sensor, ctrl->val);
+		break;
 	case V4L2_CID_EXPOSURE:
-		return ov2680_exposure_set(sensor, ctrl->val);
+		ret = ov2680_exposure_set(sensor, ctrl->val);
+		break;
 	case V4L2_CID_VFLIP:
-		return ov2680_set_vflip(sensor, ctrl->val);
+		ret = ov2680_set_vflip(sensor, ctrl->val);
+		break;
 	case V4L2_CID_HFLIP:
-		return ov2680_set_hflip(sensor, ctrl->val);
+		ret = ov2680_set_hflip(sensor, ctrl->val);
+		break;
 	case V4L2_CID_TEST_PATTERN:
-		return ov2680_test_pattern_set(sensor, ctrl->val);
+		ret = ov2680_test_pattern_set(sensor, ctrl->val);
+		break;
 	default:
+		ret = -EINVAL;
 		break;
 	}
 
-	return -EINVAL;
+	pm_runtime_put(sensor->sd.dev);
+	return ret;
 }
 
 static const struct v4l2_ctrl_ops ov2680_ctrl_ops = {