drm/exynos: add render node support

[Inki Dae]

Hi Emil,

On 2015년 08월 31일 20:58, Emil Velikov wrote:
> Hi all,
> 
> On 18 August 2015 at 08:01, Inki Dae <inki.dae at samsung.com> wrote:
>> From: Joonyoung Shim <jy0922.shim at samsung.com>
>>
>> This patch allows clients who want to use render node to access
>> rendering relevant ioctls - g2d, post processor and gem allocation.
>>
> I seem to recall Dave and others saying that we must have users of
> these interfaces prior to merging them into the kernel. Then again I
> cannot find any open-source userspace using the post-processor. Can
> anyone kingly share a link ?

You can refer to the user-space below,
https://review.tizen.org/git/?p=platform/upstream/libdrm.git;a=commit;h=52de1c57e2e6f3b2a1259478d5ae260ed4c5706e

> 
> On the g2d front, can you guys take a look at the work Tobias has been
> doing ? He seems to be the only one that cares about it :'(

I'd like to say really sorry about that to you and Tobias. Will review
it soon.

Thanks,
Inki Dae

> 
> Thanks
> Emil
>