[Intel-gfx] [PATCH v3 2/3] drm/i915: set proper N/MCTS on more platforms

[Yang, Libin]

> -----Original Message-----
> From: Ville Syrjälä [mailto:ville.syrjala at linux.intel.com]
> Sent: Thursday, August 4, 2016 4:54 PM
> To: libin.yang at linux.intel.com
> Cc: intel-gfx at lists.freedesktop.org; jani.nikula at linux.intel.com; Vetter, Daniel
> <daniel.vetter at intel.com>; tiwai at suse.de; Yang, Libin <libin.yang at intel.com>
> Subject: Re: [PATCH v3 2/3] drm/i915: set proper N/MCTS on more platforms
> 
> On Thu, Aug 04, 2016 at 03:58:03PM +0800, libin.yang at linux.intel.com wrote:
> > From: Libin Yang <libin.yang at linux.intel.com>
> >
> > This patch applies setting proper N/M, N/CTS on more platforms.
> >
> > Signed-off-by: Libin Yang <libin.yang at linux.intel.com>
> 
> Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Not that I particularly like this special casing of platforms. We should really try
> to unify this across the board, and I thought we already agreed that that was
> going to happen?

Yes, and based on the spec, even it is not supporting 4K resolution,
the n/mcts should also be OK. It is for clock, not for resolution.
So I agree to apply the patches to other platforms.

Regards,
Libin

> 
> > ---
> >  drivers/gpu/drm/i915/intel_audio.c | 6 +-----
> >  1 file changed, 1 insertion(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_audio.c
> > b/drivers/gpu/drm/i915/intel_audio.c
> > index 04e7358..7aa0203 100644
> > --- a/drivers/gpu/drm/i915/intel_audio.c
> > +++ b/drivers/gpu/drm/i915/intel_audio.c
> > @@ -732,11 +732,7 @@ static int
> i915_audio_component_sync_audio_rate(struct device *dev,
> >  	int n;
> >  	int err = 0;
> >
> > -	/* HSW, BDW, SKL, KBL need this fix */
> > -	if (!IS_SKYLAKE(dev_priv) &&
> > -	    !IS_KABYLAKE(dev_priv) &&
> > -	    !IS_BROADWELL(dev_priv) &&
> > -	    !IS_HASWELL(dev_priv))
> > +	if (!HAS_DDI(dev_priv))
> >  		return 0;
> >
> >  	mutex_lock(&dev_priv->av_mutex);
> > --
> > 1.9.1
> 
> --
> Ville Syrjälä
> Intel OTC