There is already one KMS abstraction layer (libkms.so) in libdrm, maybe it
can serve as what we needed.

Regards,
Jammy

On Thu, Feb 17, 2011 at 9:08 AM, Clark, Rob [off-list ref] wrote:

I'm still in the learning-as-I-go phase here, so definitely not ready
to propose a solution, but it does seem to me like there is room for
some sort of kms-helper library here to handle more of the boilerplate
xf86-video-* stuff..  I guess I'll have a better picture once I have a
chance to add support for the various multi-monitor configurations.
But certainly would be interested if anyone already has some ideas.

BR,
-R

On Wed, Feb 16, 2011 at 8:42 AM, Jesse Barker [off-list ref]
wrote:

quoted

Speaking for the Linaro graphics working group, I think it's great.  And,

I

quoted

think you're right, that if enough of the KMS support in xf86-video-* is
similar enough (I was only aware of intel and nouveau supporting it

properly

quoted

at current), pulling it out into a common layer would make it easier to
support in new drivers (including fbdev).

cheers,
Jesse

On Wed, Feb 16, 2011 at 4:22 AM, Arnd Bergmann [off-list ref] wrote:

quoted

On Tuesday 15 February 2011, Clark, Rob wrote:

quoted

I'd been experimenting a bit on the side w/ the DRM driver framework (

http://gitorious.com/~robclark/pandaboard/robclarks-kernel-omap4/commits/omap_gpu

quoted

quoted

quoted

), but had to add a good chunk of mostly boilerplate code to our xorg
driver in order just to test it.  Maybe some generic support for KMS
in xf86-video-fbdev would have made this easier to develop the kernel
part without in parallel having to implement the userspace part.  I'm
not sure if this is the sort of thing the linaro-wg has in mind?

I'm not sure what the the linaro multimedia wg thinks of this, but the
kernel code you linked looks like it's doing exactly the right thing.

       Arnd

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