linux-kernel - Re: [PATCH 2/2] media: coda: be more flexible wrt jpeg dimensions

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Message-ID: <20200324092131.GB12488@pengutronix.de>
Date:   Tue, 24 Mar 2020 10:21:31 +0100
From:   Philipp Zabel <pza@...gutronix.de>
To:     Adrian Ratiu <adrian.ratiu@...labora.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ezequiel Garcia <ezequiel@...labora.com>, kernel@...labora.com,
        kernel@...gutronix.de, Tim Harvey <tharvey@...eworks.com>
Subject: Re: [PATCH 2/2] media: coda: be more flexible wrt jpeg dimensions

Hi Adrian,

On Mon, Mar 23, 2020 at 03:09:37PM +0200, Adrian Ratiu wrote:
> Don't require jpeg dimensions to exactly match format dimensions,
> so we are able to decode and display a wider range jpegs instead
> of outright rejecting the ones which don't match.

I don't think this is right. If userspace feeds us an incomatible
JPEG we should probably stop decoding and send a source change
event instead [1].

[1] https://linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/dev-decoder.html#dynamic-resolution-change

regards
Philipp