On Wed, Feb 16, 2022 at 11:54:00AM +0200, Jani Nikula wrote: > On Fri, 11 Feb 2022, Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx> wrote: > > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > > > snb_wm_latency_quirk() already boosts up the latency values > > so the extra warning about the SSKPD value being insufficient > > is now redundant. Drop it. > > > > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > I just might not understand what's going on... > > ...but snb_wm_latency_quirk() is only called for display 6, not for ivb > where the check is also removed? Hmm. Not sure this was ever an issue on IVB. I think the BIOSen might have gotten all fixed by that time. Not sure. I guess we can keep this for now. And maybe I should just rewrite to look at the parsed latency values instead... > > BR, > Jani. > > > --- > > drivers/gpu/drm/i915/intel_pm.c | 15 --------------- > > 1 file changed, 15 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > > index 0fa3dce9bd54..34e46a9b8300 100644 > > --- a/drivers/gpu/drm/i915/intel_pm.c > > +++ b/drivers/gpu/drm/i915/intel_pm.c > > @@ -7432,17 +7432,6 @@ static void cpt_init_clock_gating(struct drm_i915_private *dev_priv) > > } > > } > > > > -static void gen6_check_mch_setup(struct drm_i915_private *dev_priv) > > -{ > > - u32 tmp; > > - > > - tmp = intel_uncore_read(&dev_priv->uncore, MCH_SSKPD); > > - if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL) > > - drm_dbg_kms(&dev_priv->drm, > > - "Wrong MCH_SSKPD value: 0x%08x This can cause underruns.\n", > > - tmp); > > -} > > - > > static void gen6_init_clock_gating(struct drm_i915_private *dev_priv) > > { > > u32 dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; > > @@ -7500,8 +7489,6 @@ static void gen6_init_clock_gating(struct drm_i915_private *dev_priv) > > g4x_disable_trickle_feed(dev_priv); > > > > cpt_init_clock_gating(dev_priv); > > - > > - gen6_check_mch_setup(dev_priv); > > } > > > > static void lpt_init_clock_gating(struct drm_i915_private *dev_priv) > > @@ -7853,8 +7840,6 @@ static void ivb_init_clock_gating(struct drm_i915_private *dev_priv) > > > > if (!HAS_PCH_NOP(dev_priv)) > > cpt_init_clock_gating(dev_priv); > > - > > - gen6_check_mch_setup(dev_priv); > > } > > > > static void vlv_init_clock_gating(struct drm_i915_private *dev_priv) > > -- > Jani Nikula, Intel Open Source Graphics Center -- Ville Syrjälä Intel