linux-kernel - Re: [PATCH v2 1/1] media: v4l: Don't turn on privacy LED if streamon fails

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Message-ID: <e7b07a8c-d56f-486f-9c5e-d0450288a1a3@ideasonboard.com>
Date: Thu, 11 Apr 2024 11:14:26 +0530
From: Umang Jain <umang.jain@...asonboard.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>, linux-media@...r.kernel.org
Cc: tomi.valkeinen@...asonboard.com,
 Mauro Carvalho Chehab <mchehab@...nel.org>, Hans Verkuil
 <hverkuil@...all.nl>, Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 linux-kernel@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH v2 1/1] media: v4l: Don't turn on privacy LED if streamon
 fails

Hi Sakari,

Thank you for the patch

On 10/04/24 5:18 pm, Hans de Goede wrote:
> Hi,
>
> On 4/10/24 1:47 PM, Sakari Ailus wrote:
>> Turn on the privacy LED only if streamon succeeds. This can be done after
>> enabling streaming on the sensor.
>>
>> Fixes: b6e10ff6c23d ("media: v4l2-core: Make the v4l2-core code enable/disable the privacy LED if present")
>> Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
> Thanks, patch looks good to me:

Looks good to me too
>
> Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Reviewed-by: Umang Jain <umang.jain@...asonboard.com>

>
> Regards,
>
> Hans
>
>
>
>> ---
>>   drivers/media/v4l2-core/v4l2-subdev.c | 22 ++++++++++++----------
>>   1 file changed, 12 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
>> index 4c6198c48dd6..012b757eac9f 100644
>> --- a/drivers/media/v4l2-core/v4l2-subdev.c
>> +++ b/drivers/media/v4l2-core/v4l2-subdev.c
>> @@ -412,15 +412,6 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable)
>>   	if (WARN_ON(!!sd->enabled_streams == !!enable))
>>   		return 0;
>>   
>> -#if IS_REACHABLE(CONFIG_LEDS_CLASS)
>> -	if (!IS_ERR_OR_NULL(sd->privacy_led)) {
>> -		if (enable)
>> -			led_set_brightness(sd->privacy_led,
>> -					   sd->privacy_led->max_brightness);
>> -		else
>> -			led_set_brightness(sd->privacy_led, 0);
>> -	}
>> -#endif
>>   	ret = sd->ops->video->s_stream(sd, enable);
>>   
>>   	if (!enable && ret < 0) {
>> @@ -428,9 +419,20 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable)
>>   		ret = 0;
>>   	}
>>   
>> -	if (!ret)
>> +	if (!ret) {
>>   		sd->enabled_streams = enable ? BIT(0) : 0;
>>   
>> +#if IS_REACHABLE(CONFIG_LEDS_CLASS)
>> +		if (!IS_ERR_OR_NULL(sd->privacy_led)) {
>> +			if (enable)
>> +				led_set_brightness(sd->privacy_led,
>> +						   sd->privacy_led->max_brightness);
>> +			else
>> +				led_set_brightness(sd->privacy_led, 0);
>> +		}
>> +#endif
>> +	}
>> +
>>   	return ret;
>>   }
>>