linux-kernel - Re: [PATCH v2 08/20] media: i2c: ov4689: Enable runtime PM before registering sub-device

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Date: Fri, 23 Feb 2024 13:29:16 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Mikhail Rudenko <mike.rudenko@...il.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Jacopo Mondi <jacopo@...ndi.org>,
	Tommaso Merciai <tomm.merciai@...il.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Dave Stevenson <dave.stevenson@...pberrypi.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>
Subject: Re: [PATCH v2 08/20] media: i2c: ov4689: Enable runtime PM before
 registering sub-device

Hi Mikhail,

Thank you for the patch.

On Mon, Dec 18, 2023 at 08:40:29PM +0300, Mikhail Rudenko wrote:
> As the sensor may be accessible right after its async sub-device is
> registered, enable runtime PM before doing so.
> 
> Signed-off-by: Mikhail Rudenko <mike.rudenko@...il.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
>  drivers/media/i2c/ov4689.c | 14 ++++++++------
>  1 file changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c
> index 501901aad4ae..5300e621ff90 100644
> --- a/drivers/media/i2c/ov4689.c
> +++ b/drivers/media/i2c/ov4689.c
> @@ -876,19 +876,21 @@ static int ov4689_probe(struct i2c_client *client)
>  		goto err_clean_entity;
>  	}
>  
> +	pm_runtime_set_active(dev);
> +	pm_runtime_enable(dev);
> +	pm_runtime_idle(dev);
> +
>  	ret = v4l2_async_register_subdev_sensor(sd);
>  	if (ret) {
>  		dev_err(dev, "v4l2 async register subdev failed\n");
> -		goto err_clean_subdev;
> +		goto err_clean_subdev_pm;
>  	}
>  
> -	pm_runtime_set_active(dev);
> -	pm_runtime_enable(dev);
> -	pm_runtime_idle(dev);
> -
>  	return 0;
>  
> -err_clean_subdev:
> +err_clean_subdev_pm:
> +	pm_runtime_disable(dev);
> +	pm_runtime_set_suspended(dev);
>  	v4l2_subdev_cleanup(sd);
>  err_clean_entity:
>  	media_entity_cleanup(&sd->entity);

-- 
Regards,

Laurent Pinchart