On Wed, 13 Mar 2013 11:21:06 -0700 Ben Widawsky <ben at bwidawsk.net> wrote: > BIOS should be setting this, but in case it doesn't... > > Signed-off-by: Ben Widawsky <ben at bwidawsk.net> > --- > drivers/gpu/drm/i915/i915_gem.c | 3 +++ > drivers/gpu/drm/i915/i915_reg.h | 1 + > 2 files changed, 4 insertions(+) > > diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c > index 1417fc6..ee9c14c 100644 > --- a/drivers/gpu/drm/i915/i915_gem.c > +++ b/drivers/gpu/drm/i915/i915_gem.c > @@ -3986,6 +3986,9 @@ i915_gem_init_hw(struct drm_device *dev) > if (IS_HASWELL(dev) && (I915_READ(0x120010) == 1)) > I915_WRITE(0x9008, I915_READ(0x9008) | 0xf0000); > > + if (HAS_PCH_NOP(dev)) > + I915_WRITE(GEN7_MSG_CTL, 0); > + > i915_gem_l3_remap(dev); > > i915_gem_init_swizzling(dev); > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h > index 4cf3ece..00b6a55 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -3481,6 +3481,7 @@ > #define DISP_ARB_CTL 0x45000 > #define DISP_TILE_SURFACE_SWIZZLING (1<<13) > #define DISP_FBC_WM_DIS (1<<15) > +#define GEN7_MSG_CTL 0x45010 > > /* GEN7 chicken */ > #define GEN7_COMMON_SLICE_CHICKEN1 0x7010 I think this needs a comment or at least a define or two for the bits. And are we sure we want to clobber the upper bits? They're listed as "PBC", which may be related to PBR, but somehow I doubt the GT will spew beer if we write the bits. -- Jesse Barnes, Intel Open Source Technology Center
