Re: [PATCH 4/5] drm/i915: Store boot CDCLK in dev_priv on DDI platforms

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Wed, May 20, 2015 at 05:56:30PM +0200, Daniel Vetter wrote:
> On Wed, May 20, 2015 at 05:53:42PM +0200, Daniel Vetter wrote:
> > On Wed, May 20, 2015 at 02:45:17PM +0100, Damien Lespiau wrote:
> > > Right not we don't initialize the stored CDCLK on DDI platforms. Fix
> > > that.
> > > 
> > > Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
> > 
> > Merged up to this patch, thanks, Daniel
> 
> I'll take that back, our usage of dev_priv->cdclk_freq seems rather
> inconsistent and there's patches in-flight to completely rework all this.
> Hence I dropped this patch here again.

dev_priv->cdclk_freq is going to be the current cdclk frequency. So if
we actually want to hang on to the boot cdclk it needs to be stored
separately.

> -Daniel
> 
> > 
> > > ---
> > >  drivers/gpu/drm/i915/intel_ddi.c | 4 ++--
> > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> > > index d602db2..b57f156 100644
> > > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > > @@ -2518,8 +2518,8 @@ 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));
> > > +	dev_priv->cdclk_freq = dev_priv->display.get_display_clock_speed(dev);
> > > +	DRM_DEBUG_KMS("CDCLK running at %dKHz\n", dev_priv->cdclk_freq);
> > >  
> > >  	if (IS_SKYLAKE(dev)) {
> > >  		if (!(I915_READ(LCPLL1_CTL) & LCPLL_PLL_ENABLE))
> > > -- 
> > > 2.1.0
> > > 
> > > _______________________________________________
> > > Intel-gfx mailing list
> > > Intel-gfx@lists.freedesktop.org
> > > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> > 
> > -- 
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel OTC
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