On Thu, 2013-11-28 at 17:29 +0200, ville.syrj...@linux.intel.com wrote: > From: Ville Syrjälä <ville.syrj...@linux.intel.com> > > On gen2 the compressed frame buffer pitch is specified in 32B units > rather than the 64B units used on gen3+. > > Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reviewed-by: Imre Deak <imre.d...@intel.com> > --- > drivers/gpu/drm/i915/intel_pm.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index 614549b..1dee34c 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -103,8 +103,11 @@ static void i8xx_enable_fbc(struct drm_crtc *crtc, > if (fb->pitches[0] < cfb_pitch) > cfb_pitch = fb->pitches[0]; > > - /* FBC_CTL wants 64B units */ > - cfb_pitch = (cfb_pitch / 64) - 1; > + /* FBC_CTL wants 32B or 64B units */ > + if (IS_GEN2(dev)) > + cfb_pitch = (cfb_pitch / 32) - 1; > + else > + cfb_pitch = (cfb_pitch / 64) - 1; > plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB; > > /* Clear old tags */
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