Re: New proposed DRM interface design

[Helge Hafting]

Jon Smirl wrote:

> They have to be merged. Cards with two heads need the mode set on each
> head. fbdev only sets the mode on one head. If I teach fbdev how to
> set the mode of the other head fbdev needs to learn about memory
> management.  The DRM memory management code is complex and is a big
> chunk of the driver.
>
> I would also like to fix things so that we can have two logged in
> users, one on each head. This isn't going to work if one them uses
> fbdev and keeps swithing the chip to 2D mode while the other user is
> in 3D mode. The chip needs to stay in 3D mode with the CP running.
>
>  
Yes!  I use the ruby patch and have two users logged in on the
two heads of a G550.  It works fine - as long as no mode
change is attempted.  And only one user can use 3D (or even 2D),
the other is stuck with a unaccelerated framebuffer.

> We're not going to get OOPS display while running X without merging.
> Something I would really like to have since I just had some and was
> force to hook up a serial console.
>  
Also nice to have.

Helge Hafting
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