[Intel-gfx] [PATCH] drm/agp: agp-intel/i915: trim stolen space to 16M

[Jesse Barnes]

On Tue, 23 Mar 2010 19:13:49 +0100
Lukas Hejtmanek <xhejtman at ics.muni.cz> wrote:

> Hello,
> 
> On Tue, Mar 23, 2010 at 10:10:28AM -0700, Jesse Barnes wrote:
> > > Jesse, from Yakui's recent finding, the compressed fb size for Cantiga
> > > and Ironlake could be as large as 4096x2048 32bpc for 32MB, so some large
> > > fb size e.g 1900x1200 could be compressed. So max 16M for stolen may be
> > > too small?
> > > 
> > > I'll send out Yakui's patch later.
> > 
> > Yeah, if we need to bump the limit, that's fine.  We'd need to adjust
> > both the limit I added in AGP and the allocation size we try for in
> > i915_dma.c when we set up the compressed buffer.
> 
> is this somehow related?
> 
> [103307.780798] [drm:intel_update_fbc], framebuffer too large, disabling
> compression
> [103307.780800] [drm:intel_update_fbc], unsupported config, disabling FBC
> 
> I use 1680x1050 and I have i965GM. (I supose 8MB stolen memory.)

There should be a "set up XM of stolen memory" in your log somewhere as
well.  If you don't have enough, there's not much we can do.  If you do
have enough, but our compressed buffer is too small, that's something
we can fix.

-- 
Jesse Barnes, Intel Open Source Technology Center