linux-kernel - Re: [PATCH v5 0/8] Add MT8173 Video Encoder Driver and VPU Driver

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Message-ID: <56D04E98.8040209@xs4all.nl>
Date:	Fri, 26 Feb 2016 14:09:44 +0100
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Stanimir Varbanov <svarbanov@...sol.com>,
	Tiffany Lin <tiffany.lin@...iatek.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	daniel.thompson@...aro.org, Rob Herring <robh+dt@...nel.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Pawel Osciak <posciak@...omium.org>
Cc:	Eddie Huang <eddie.huang@...iatek.com>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
	linux-mediatek@...ts.infradead.org, PoChun.Lin@...iatek.com
Subject: Re: [PATCH v5 0/8] Add MT8173 Video Encoder Driver and VPU Driver

On 02/26/2016 12:58 PM, Stanimir Varbanov wrote:
> Hi Hans,
> 
> <snip>
> 
>> Nice!
>>
>> Can you try 'v4l2-compliance -s'? Note that this may not work since I know
>> that v4l2-compliance doesn't work all that well with codecs, but I am
>> curious what the output is when you try streaming.
> 
> Sorry for the off topic question.
> 
> Does every new v4l2 encoder/decoder driver must use v4l2 mem2mem device
> framework, with other words is that mandatory?
> 

No, that's not mandatory. In most cases it will simplify your code, but
sometimes it only makes it harder and then you are better off doing it
yourself.

Regards,

	Hans