[PATCH 09/10] drm/exynos: add G2D driver

[Joonyoung Shim]

On 03/15/2012 07:50 PM, Dave Airlie wrote:
>> G2D is a 2D graphic accelerator that supports Bit Block Transfer. This
>> G2D driver is exynos drm specific and supports only exynos4x12 series.
>> user application fills command set in cmdlist and once dma start request
>> these cmdlists are parsed and performed by dma.
> Where is this block documented or a pointer to the corresponding open
> userspace user code?

I attach simple g2dtest program patch. The base of this patch is master
branch of lastest libdrm git.

This user progrem can test just solid color fill example.
I will cleanup and update it for more operations later.

Thanks.

> Again the ioctls look like they need to be depointered and use __u64.
>
> It would be nice if you could document how the command stream and engine work.
>
> How does userspace pass addresses to it? straight or via gem objects?
> how does it
> stop userspace blt to places it shouldn't etc.
>
> I'm getting the feeling this accel enabled driver needs a lot more of
> a commit message
> and lot more documentation on what it can be used for.
>
> Dave.
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