linux-kernel - Re: [PATCH 0/6] Davinci fbdev driver and enable it for DMx platform

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Message-ID: <CA+V-a8sLD2dP1RLb8ibZDOsLCP8hhMNUTr-zzU1zx_2ALDaDrg@mail.gmail.com>
Date:	Fri, 26 Apr 2013 11:16:28 +0530
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:	DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
	LMML <linux-media@...r.kernel.org>,
	LFBDEV <linux-fbdev@...r.kernel.org>,
	LAK <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Sekhar Nori <nsekhar@...com>,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Florian Tobias Schandinat <FlorianSchandinat@....de>
Subject: Re: [PATCH 0/6] Davinci fbdev driver and enable it for DMx platform

Hi Laurent,

On Thu, Apr 25, 2013 at 2:32 AM, Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
> Hi Prabhakar,
>
> Thank you for the patch.
>
> On Wednesday 24 April 2013 17:30:02 Prabhakar Lad wrote:
>> From: Lad, Prabhakar <prabhakar.csengg@...il.com>
>>
>> This patch series adds an fbdev driver for Texas
>> Instruments Davinci SoC.The display subsystem consists
>> of OSD and VENC, with OSD supporting 2 RGb planes and
>> 2 video planes.
>> http://focus.ti.com/general/docs/lit/
>> getliterature.tsp?literatureNumber=sprue37d&fileType=pdf
>>
>> A good amount of the OSD and VENC enabling code is
>> present in the kernel, and this patch series adds the
>> fbdev interface.
>>
>> The fbdev driver exports 4 nodes representing each
>> plane to the user - from fb0 to fb3.
>
> The obvious question is: why not a KMS driver instead ? :-)
>
I did go through the KMS model (thanks for pointing to your work and the video)
and it looks like this would require a fair amount of development, at this point
of time I would go with the current implementation and revisit on KMS model
at later point of time.

Regards,
--Prabhakar
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