Re: [PATCH] media: i2c: improve suspend/resume switch performance for GT9769 VCM driver

["Zhi Mao (毛智)" <zhi.mao@mediatek.com>]

ping...

On Sat, 2024-08-31 at 13:52 +0800, Zhi Mao wrote:
> Chromebook camera AP can switch between video and photo mode,
> the behavior corresponding to VCM is suspend and resume,
> it will cause camera preview is not smooth during switching
> operation.
> We use autosuspend function can fix this issue.
> 
> Signed-off-by: Zhi Mao <zhi.mao@mediatek.com>
> ---
>  drivers/media/i2c/dw9768.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/i2c/dw9768.c b/drivers/media/i2c/dw9768.c
> index 18ef2b35c9aa..7449d29df901 100644
> --- a/drivers/media/i2c/dw9768.c
> +++ b/drivers/media/i2c/dw9768.c
> @@ -374,7 +374,7 @@ static int dw9768_open(struct v4l2_subdev *sd,
> struct v4l2_subdev_fh *fh)
>  
>  static int dw9768_close(struct v4l2_subdev *sd, struct
> v4l2_subdev_fh *fh)
>  {
> -	pm_runtime_put(sd->dev);
> +	pm_runtime_put_sync_autosuspend(sd->dev);
>  
>  	return 0;
>  }
> @@ -490,6 +490,7 @@ static int dw9768_probe(struct i2c_client
> *client)
>  		goto err_power_off;
>  	}
>  
> +	pm_runtime_use_autosuspend(dev);
>  	pm_runtime_idle(dev);
>  
>  	return 0;