Hi Sascha,

On Wed, Feb 09, 2011 at 04:37:16PM +0100, ext Sascha Hauer wrote:

Hi Arnd,

On Wed, Feb 09, 2011 at 03:47:11PM +0100, Arnd Bergmann wrote:

quoted

Did you consider making the driver a KMS driver instead of
a frame buffer? I think the recommendation these days is
to start out with KMS for new drivers, which will be somewhat
simpler and give you a frame buffer device as well. I don't
think that there is a need to change over any drivers from
fb to kms though, since you've already done the work.

I tried doing so for the i.MX51 which supports multiple displays on dvi
and vga outputs and thus could make good use of KMS and friends. Anyway,
I got stuck quite fast. The KMS stuff is tightly coupled with DRM/DRI
and needs many many callbacks to implement. Additionally the userspace
tools expect a nvidia/amd/intel driver and do not have a generic
fallback. I think this stuff is good for implementing a full blown
graphics driver, but is lacking support for simple framebuffer grapics.
I'd love to go this way but it still requires a lot of work.

I will get the i.MX28 EVK within a couple of weeks. I'm curious of KMS,
which I don't know at all, and I would like to work on it. We could
join the efforts. What do you think?

Best regards,
Domenico