[libdrm] improvements to userspace exynos component

[Joonyoung Shim]

Hi,

On 02/03/2015 10:53 PM, Tobias Jakobi wrote:
> Hello,
> 
> here are some miscellaneous improvements (small features, bugfixes, spelling fixes, etc.) for the exynos component of libdrm. The general idea is to let userspace use the G2D engine functionality more 
> efficiently.
> 
> If someone is interested in an application that actually makes use of this, the RetroArch frontend has a custom video backend:
> https://github.com/libretro/RetroArch/blob/master/gfx/drivers/exynos_gfx.c
> 
> 
> Please review and let me know what I can improve.
> 

Working well on odroid u3 board.

Tested-by: Joonyoung Shim <jy0922.shim at samsung.com>