linux-kernel - Re: [PATCH v11 2/3] media: rockchip: Add a driver for Rockchip's camera interface

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Date:   Tue, 21 Nov 2023 11:05:43 +0100
From:   Michael Riesch <michael.riesch@...fvision.net>
To:     Mehdi Djait <mehdi.djait@...tlin.com>, mchehab@...nel.org,
        heiko@...ech.de, hverkuil-cisco@...all.nl,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        conor+dt@...nel.org
Cc:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
        alexandre.belloni@...tlin.com, maxime.chevallier@...tlin.com,
        paul.kocialkowski@...tlin.com
Subject: Re: [PATCH v11 2/3] media: rockchip: Add a driver for Rockchip's
 camera interface

Hi Mehdi,

During testing I found another issue:

On 11/16/23 12:04, Mehdi Djait wrote:
> [...]
> +static int cif_stream_start(struct cif_stream *stream)
> +{
> +	u32 val, mbus_flags, href_pol, vsync_pol, fmt_type,
> +	    xfer_mode = 0;
> +	struct cif_device *cif_dev = stream->cifdev;
> +	struct cif_remote *remote_info = &cif_dev->remote;
> +	int ret;
> +	u32 input_mode;
> +
> +	stream->frame_idx = 0;
> +
> +	fmt_type = stream->cif_fmt_in->fmt_type;
> +	input_mode = (remote_info->std == V4L2_STD_NTSC) ?
> +		      CIF_FORMAT_INPUT_MODE_NTSC :
> +		      CIF_FORMAT_INPUT_MODE_PAL;
> +	mbus_flags = remote_info->mbus.bus.parallel.flags;

remote_info->mbus is accessed here, but where/how is it actually set? It
seems that the struct is actually zero'd.

Best regards,
Michael

> [...]