On Tue, 2 Oct 2012 17:43:40 -0500 Jesse Barnes <jbarnes at virtuousgeek.org> wrote: > This allows us to get the right vblank interrupt frequency. > > Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org> > --- > drivers/gpu/drm/i915/intel_pm.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index 0659317..828629b 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -3687,6 +3687,13 @@ static void valleyview_init_clock_gating(struct drm_device *dev) > PIPEA_HLINE_INT_EN | PIPEA_VBLANK_INT_EN | > SPRITEB_FLIPDONE_INT_EN | SPRITEA_FLIPDONE_INT_EN | > PLANEA_FLIPDONE_INT_EN); > + > + /* > + * WaDisableVLVClockGating_VBIIssue > + * Disable clock gating on th GCFG unit to prevent a delay > + * in the reporting of vblank events. > + */ > + I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS); > } > > static void g4x_init_clock_gating(struct drm_device *dev) This seems like only X0. -- Ben Widawsky, Intel Open Source Technology Center
