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

[Dave Airlie]

>
> 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?

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.