On Thu, May 21, 2015 at 06:44:53PM +0300, Ville Syrjälä wrote:
> > diff --git a/drivers/gpu/drm/i915/intel_ddi.c
> > b/drivers/gpu/drm/i915/intel_ddi.c
> > index d602db2..cacb07b 100644
> > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > @@ -2510,6 +2510,7 @@ void intel_ddi_pll_init(struct drm_device *dev)
> > {
> > struct drm_i915_private *dev_priv = dev->dev_private;
> > uint32_t val = I915_READ(LCPLL_CTL);
> > + int cdclk_freq;
> >
> > if (IS_SKYLAKE(dev))
> > skl_shared_dplls_init(dev_priv);
> > @@ -2518,12 +2519,15 @@ void intel_ddi_pll_init(struct drm_device *dev)
> > else
> > hsw_shared_dplls_init(dev_priv);
> >
> > - DRM_DEBUG_KMS("CDCLK running at %dKHz\n",
> > - dev_priv->display.get_display_clock_speed(dev));
> > + cdclk_freq = dev_priv->display.get_display_clock_speed(dev);
> > + DRM_DEBUG_KMS("CDCLK running at %dKHz\n", cdclk_freq);
> >
> > if (IS_SKYLAKE(dev)) {
> > + dev_priv->skl_boot_cdclk = cdclk_freq;
> > if (!(I915_READ(LCPLL1_CTL) & LCPLL_PLL_ENABLE))
> > DRM_ERROR("LCPLL1 is disabled\n");
> > + else
> > + intel_display_power_get(dev_priv, POWER_DOMAIN_PLLS);
>
> Hmm, actually are we not calling the skl_init_cdclk() on boot at all? I see
> it only in the resume path.
Yes that's correct, we always have display intialized by the firmware on
big core as far as I know (which may not be true for BXT).
--
Damien
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