Re: radeon-pre-2

Vladimir Dergachev
2004-09-11T17:52:30Z

On Sat, 11 Sep 2004, Alan Cox wrote:

> On Sad, 2004-09-11 at 18:10, Vladimir Dergachev wrote:
>> This is a good point - if we don't need DMA or 3d acceleration we can
>> reduce memory footprint. This would seem that current DRM driver would
>> need to be dependent on whatever driver contains the mode setting code.
>>
>> What do you think ?
>
> Jon wants to get mode setting into a seperate piece of functionality -
> preferably in user space for many cards. I'd dearly love to see hotplug
> handing all but some "emergency" pre-computed mode settings.

I think there is a misunderstanding.

My view was that PLL setting (and setting of a fixed mode) would be done
in DRM driver. This way it would be able to restore previous settings
after a lockup or respond to FB request to change modes.

However the decision of which mode to set, as well as where the
framebuffer is located is done in user-space. (So that subtleties of
layout of offscreen memory are not in the kernel).

Jon - did I understand you correctly ?

best

Vladimir Dergachev