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

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Date:	Fri, 3 May 2013 15:45:44 +0530
From:	Prabhakar Lad <prabhakar.csengg@...il.com>
To:	Sekhar Nori <nsekhar@...com>
Cc:	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	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>,
	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

On Fri, May 3, 2013 at 3:25 PM, Sekhar Nori <nsekhar@...com> wrote:
> On 4/26/2013 11:16 AM, Prabhakar Lad wrote:
>> 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.
>
> But I doubt you will be able to sneak a new fbdev driver through. Last
> time I heard, Andrew is only taking in fixes not new features.
>
Then we have no choice left and go with KMS driver itself though it would take
some time since KMS is a new inclusion into DRM.

Regards,
--Prabhakar
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