Jani Nikula <jani.nikula@xxxxxxxxx> writes: > Media force wake get hangs the machine when the system is booted without > displays attached. The assumption is that (at least some versions of) > the firmware has skipped some initialization in that case. > > Empirical evidence suggests we need to reset the media force wake > request register in addition to the render one to avoid hangs. > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75895 > Reported-by: Imre Deak <imre.deak@xxxxxxxxx> > Reported-by: Darren Hart <dvhart@xxxxxxxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> > --- > > Darren, a Tested-by would be much appreciated! > > Thanks, > Jani. > --- > drivers/gpu/drm/i915/intel_uncore.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c > index 76dc185793ce..27fe2df47d73 100644 > --- a/drivers/gpu/drm/i915/intel_uncore.c > +++ b/drivers/gpu/drm/i915/intel_uncore.c > @@ -185,6 +185,8 @@ static void vlv_force_wake_reset(struct drm_i915_private *dev_priv) > { > __raw_i915_write32(dev_priv, FORCEWAKE_VLV, > _MASKED_BIT_DISABLE(0xffff)); > + __raw_i915_write32(dev_priv, FORCEWAKE_MEDIA_VLV, > + _MASKED_BIT_DISABLE(0xffff)); > /* something from same cacheline, but !FORCEWAKE_VLV */ > __raw_posting_read(dev_priv, FORCEWAKE_ACK_VLV); > } > -- > 1.9.1 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
