linux-kernel - Re: [PATCH] media: i2c: imx412: Extend the power-on waiting time

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Message-ID: <aUkLKECix4vohyTB@kekkonen.localdomain>
Date: Mon, 22 Dec 2025 11:11:04 +0200
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
To: Wenmeng Liu <wenmeng.liu@....qualcomm.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Wenmeng Liu <quic_wenmliu@...cinc.com>
Subject: Re: [PATCH] media: i2c: imx412: Extend the power-on waiting time

Hi Wenmeng,

Thanks for the patch.

On Mon, Dec 22, 2025 at 05:04:07PM +0800, Wenmeng Liu wrote:
> From: Wenmeng Liu <quic_wenmliu@...cinc.com>
> 
> The Arducam IMX577 module requires a longer reset time than the 1000µs
> configured in the current driver. Increase the wait time after power-on
> to ensure proper initialization.

Is this somehow specific to the Arducam module? If so, what's there in the
module that requires this?

> 
> Signed-off-by: Wenmeng Liu <wenmeng.liu@....qualcomm.com>
> ---
> Signed-off-by: Wenmeng <wenmeng.liu@....qualcomm.com>
> ---

Which one is the right one?

>  drivers/media/i2c/imx412.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/i2c/imx412.c b/drivers/media/i2c/imx412.c
> index b3826f80354703b17b416dc233854da3f5736e38..e444c48c11b171b421c535beb23211bf0b600d3a 100644
> --- a/drivers/media/i2c/imx412.c
> +++ b/drivers/media/i2c/imx412.c
> @@ -1037,7 +1037,7 @@ static int imx412_power_on(struct device *dev)
>  		goto error_reset;
>  	}
>  
> -	usleep_range(1000, 1200);
> +	usleep_range(10000, 12000);
>  
>  	return 0;
>  
> 

-- 
Kind regards,

Sakari Ailus