[PATCH] arm64: defconfig: Increase CMA size for VC4

[Stefan Wahren]

Hi Florian,

> Eric Anholt <eric at anholt.net> hat am 3. Mai 2018 um 23:20 geschrieben:
> 
> 
> Stefan Wahren <stefan.wahren at i2se.com> writes:
> 
> > The VC4 needs more memory than the default setting (16 MB):
> >
> >   vc4-drm soc:gpu: swiotlb: coherent allocation failed, size=16777216
> >   [drm:vc4_bo_create [vc4]] *ERROR* Failed to allocate from CMA:
> >   vc4_v3d 3fc00000.v3d: Failed to allocate memory for tile binning: -12.
> >     You may need to enable CMA or give it more memory.
> >   vc4-drm soc:gpu: failed to bind 3fc00000.v3d (ops vc4_v3d_ops [vc4]): -12
> >   vc4-drm soc:gpu: master bind failed: -12
> >   vc4-drm: probe of soc:gpu failed with error -12
> >
> > So increase the value to 32 MB and fix this issue.
> >
> > Signed-off-by: Stefan Wahren <stefan.wahren at i2se.com>
> 
> If there was a way to check how big the CMA pool is, then we could
> probably have V3D disable itself when the pool was too small.  It's not
> like V3D rendering is going to actually *work* with just a 32mb pool to
> play in.
> 
> That said, I'd also be fine with this patch.

should i rebase my patch?