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

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Message-ID: <bbf6dbc9-42b5-4dd6-9346-c8f38e460709@oss.qualcomm.com>
Date: Mon, 22 Dec 2025 17:35:11 +0800
From: Wenmeng Liu <wenmeng.liu@....qualcomm.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.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

>>
>> 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?
> 

Yes, This issue occurred on the Arducam 22-pin IMX577 module.
I have tried changing the sequence of regulator, reset, and clock, and 
found that this module must wait a sufficient amount of time after reset 
before registers can be written (10 ms is a safe duration). This issue 
did not occur when using other IMX577 modules.

Thanks,
Wenmeng