Doesn't completely fix Uli's machine, but apparently it helps a bit, so: Tested-by: Ulrich Drepper <drepper@xxxxxxxxx> On Wed, 2 Oct 2013 10:34:19 -0700 Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> wrote: > Needed to prevent display corruption in high res panels. > > v2: use correct unit names (Rodrigo) > > Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/i915/i915_reg.h | 2 ++ > drivers/gpu/drm/i915/intel_pm.c | 4 +++- > 2 files changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h > index 96fd2ce..b6312d9 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -4338,7 +4338,9 @@ > #define FDI_RX_CHICKEN(pipe) _PIPE(pipe, _FDI_RXA_CHICKEN, _FDI_RXB_CHICKEN) > > #define SOUTH_DSPCLK_GATE_D 0xc2020 > +#define PCH_DPLUNIT_CLOCK_GATE_DISABLE (1<<30) > #define PCH_DPLSUNIT_CLOCK_GATE_DISABLE (1<<29) > +#define PCH_CPUNIT_CLOCK_GATE_DISABLE (1<<14) > #define PCH_LP_PARTITION_LEVEL_DISABLE (1<<12) > > /* CPU: FDI_TX */ > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index 698257c..9443f8e 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -4791,7 +4791,9 @@ static void cpt_init_clock_gating(struct drm_device *dev) > * gating for the panel power sequencer or it will fail to > * start up when no ports are active. > */ > - I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); > + I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE | > + PCH_DPLUNIT_CLOCK_GATE_DISABLE | > + PCH_CPUNIT_CLOCK_GATE_DISABLE); > I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) | > DPLS_EDP_PPS_FIX_DIS); > /* The below fixes the weird display corruption, a few pixels shifted -- Jesse Barnes, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
