[Intel-gfx] [PATCH] Make XAA support optional

Daniel Vetter daniel at ffwll.ch
Wed Jan 18 13:41:10 CET 2012

On Wed, Jan 18, 2012 at 12:27:49PM +0000, Chris Wilson wrote:
> On Wed, 18 Jan 2012 13:04:43 +0100, Daniel Vetter <daniel at ffwll.ch> wrote:
> > On Wed, Jan 18, 2012 at 10:37:24AM +0000, Chris Wilson wrote:
> > > On Wed, 18 Jan 2012 14:45:51 +1100, Daniel Stone <daniel at fooishbar.org> wrote:
> > > > Does what it says on the box.
> > > 
> > > Danvet can you please test this on your elderly i810 box and make sure
> > > we don't accidentally open the can of worms. Any sign of regressions?
> > 
> > Why don't we just rip it out entirely? If a bored soul ever ports this
> > driver to kms we likely just need to reimplement proper accel with sna, so
> > I don't think there's much value.
> If we did rip it out, what happens? The X server uses the vesa driver,
> which is equivalent to i810 for modesetting, no 3d support, no overlays,
> and no accelerated blits (which is dying anyway). Am I right in thinking
> that after removal of XAA, the legacy i810 offers no more functionality
> or performance than is available through VESA?

Afaict we're still have left
- dri1 for glxgears
- Xv for video, even XvMC might still work
- modesettting, the driver only uses vesa to grab the edid, but does all
  the modesetting with direct vga register banging. Yep, I'm running my
  i815 on a 1920x1080 screen, pretty sure that mode isn't in the vesa

So I think it's too early to shelve it ;-)
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48

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