linux-kernel - Re: [PATCH v9 2/2] media: i2c: Add the ov7740 image sensor driver

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Message-ID: <1641aa67-b05e-47e2-600c-70b77571b450@iki.fi>
Date:   Wed, 13 Dec 2017 22:06:29 +0200
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Wenyou Yang <wenyou.yang@...rochip.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     linux-kernel@...r.kernel.org,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        devicetree@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Hans Verkuil <hverkuil@...all.nl>,
        linux-arm-kernel@...ts.infradead.org,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Songjun Wu <songjun.wu@...rochip.com>
Subject: Re: [PATCH v9 2/2] media: i2c: Add the ov7740 image sensor driver

Hi Wenyou,

Wenyou Yang wrote:
...
> +static int ov7740_start_streaming(struct ov7740 *ov7740)
> +{
> +	int ret;
> +
> +	if (ov7740->fmt) {
> +		ret = regmap_multi_reg_write(ov7740->regmap,
> +					     ov7740->fmt->regs,
> +					     ov7740->fmt->reg_num);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	if (ov7740->frmsize) {
> +		ret = regmap_multi_reg_write(ov7740->regmap,
> +					     ov7740->frmsize->regs,
> +					     ov7740->frmsize->reg_num);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	return __v4l2_ctrl_handler_setup(ov7740->subdev.ctrl_handler);

I believe you're still setting the controls after starting streaming.

-- 
Sakari Ailus
sakari.ailus@....fi