linux-kernel - Re: [PATCH v6 2/2] media: i2c: imx412: Extend the power-on waiting time

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Message-ID: <e9516434-2cc0-476a-b9e2-a7159e3de34c@oss.qualcomm.com>
Date: Fri, 23 Jan 2026 10:06:29 +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
Subject: Re: [PATCH v6 2/2] media: i2c: imx412: Extend the power-on waiting
 time

Hi Sakari,

On 1/22/2026 8:37 PM, Sakari Ailus wrote:
> Hi Wenmeng,
> 
> On Thu, Jan 22, 2026 at 05:31:19PM +0800, Wenmeng Liu wrote:
>> 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.
>>
>> Signed-off-by: Wenmeng Liu <wenmeng.liu@....qualcomm.com>
>> ---
>>   drivers/media/i2c/imx412.c | 6 +++++-
>>   1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/media/i2c/imx412.c b/drivers/media/i2c/imx412.c
>> index aa63dfc349181bf9c180ffd566b0317d05b410c1..9154c238949e4308755e757bd9c71f0b44f433ee 100644
>> --- a/drivers/media/i2c/imx412.c
>> +++ b/drivers/media/i2c/imx412.c
>> @@ -1037,7 +1037,11 @@ static int imx412_power_on(struct device *dev)
>>   		goto error_reset;
>>   	}
>>   
>> -	usleep_range(1000, 1200);
>> +	/*
>> +	 * Some IMX577 modules require a longer reset settle time.
>> +	 * Increasing the delay from 1ms to 10ms ensures reliable startup.
>> +	 */
> 
> This still doesn't mention the Arducam module. :-(

Sorry about this, will mention to...

Thanks,
Wenmeng