[Intel-gfx] [PATCH 3/3] drm/i915: Fix comments about GMBUSFREQ register

[Ville Syrjälä]

On Wed, Apr 27, 2016 at 04:56:42PM +0300, Ville Syrjälä wrote:
> On Wed, Apr 27, 2016 at 04:30:14PM +0300, Mika Kahola wrote:
> > s/Programmng/Programming
> 
> It's straight from the spec, hence the [sic]

Didn't get any further objections, so pushed the series to dinq, with the typoes
and [sic]s intact.

Thans for the reviews.

> 
> > 
> > With this nitpick fixed, this is
> > 
> > Reviewed-by: Mika Kahola <mika.kahola at intel.com>
> > 
> > On Tue, 2016-04-26 at 19:46 +0300, ville.syrjala at linux.intel.com wrote:
> > > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > 
> > > The comment about GMBUSFREQ is confused. The spec actually explains
> > > the 4MHz thing perfectly by noting that the 4MHz divider values is
> > > actually just bits [9:2] not [9:0], hence the divide by 1000 correct.
> > > Replace the confused note with a quote from the spec, and eliminate
> > > the duplicated comment that snuck in.
> > > 
> > > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/intel_display.c | 15 +++++----------
> > >  1 file changed, 5 insertions(+), 10 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> > > index ea55dd331fac..ec9144ded255 100644
> > > --- a/drivers/gpu/drm/i915/intel_display.c
> > > +++ b/drivers/gpu/drm/i915/intel_display.c
> > > @@ -5311,18 +5311,13 @@ static void intel_update_cdclk(struct drm_device *dev)
> > >  			 dev_priv->cdclk_freq);
> > >  
> > >  	/*
> > > -	 * Program the gmbus_freq based on the cdclk frequency.
> > > -	 * BSpec erroneously claims we should aim for 4MHz, but
> > > -	 * in fact 1MHz is the correct frequency.
> > > +	 * 9:0 CMBUS [sic] CDCLK frequency (cdfreq):
> > > +	 * Programmng [sic] note: bit[9:2] should be programmed to the number
> > > +	 * of cdclk that generates 4MHz reference clock freq which is used to
> > > +	 * generate GMBus clock. This will vary with the cdclk freq.
> > >  	 */
> > > -	if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
> > > -		/*
> > > -		 * Program the gmbus_freq based on the cdclk frequency.
> > > -		 * BSpec erroneously claims we should aim for 4MHz, but
> > > -		 * in fact 1MHz is the correct frequency.
> > > -		 */
> > > +	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> > >  		I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->cdclk_freq, 1000));
> > > -	}
> > >  
> > >  	if (dev_priv->max_cdclk_freq == 0)
> > >  		intel_update_max_cdclk(dev);
> > 
> > -- 
> > Mika Kahola - Intel OTC
> 
> -- 
> Ville Syrjälä
> Intel OTC

-- 
Ville Syrjälä
Intel OTC