Re: [PATCH] drm/i915/display/dp: Remove UHBR13.5 for icl

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

On Mon, May 06, 2024 at 12:15:13PM +0000, Murthy, Arun R wrote:
> 
> > -----Original Message-----
> > From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > Sent: Monday, May 6, 2024 5:36 PM
> > To: Murthy, Arun R <arun.r.murthy@intel.com>
> > Cc: intel-gfx@lists.freedesktop.org; Nikula, Jani <jani.nikula@intel.com>
> > Subject: Re: [PATCH] drm/i915/display/dp: Remove UHBR13.5 for icl
> > 
> > On Mon, May 06, 2024 at 02:36:25PM +0530, Arun R Murthy wrote:
> > > UHBR13.5 is not supported in icl+ as well. This has been removed for
> > > mtl by the commit caf3d748f646 ("drm/i915/dp: Remove support for
> > > UHBR13.5")
> > 
> > icl/tgl/adl don't support UHBR at all. The numbers are there for dg2
> > presumably, which I think does support this.
> As per the recommendation from hardware team this is not supported on DG2 and MTL.

That is not what bspec says.

> 
> Thanks and Regards,
> Arun R Murthy
> -------------------
> > 
> > >
> > > Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> > > ---
> > >  drivers/gpu/drm/i915/display/intel_dp.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> > > b/drivers/gpu/drm/i915/display/intel_dp.c
> > > index 163da48bc406..7098ca65701f 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_dp.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> > > @@ -507,7 +507,7 @@ intel_dp_set_source_rates(struct intel_dp *intel_dp)
> > >  	};
> > >  	static const int icl_rates[] = {
> > >  		162000, 216000, 270000, 324000, 432000, 540000, 648000,
> > 810000,
> > > -		1000000, 1350000,
> > > +		1000000,
> > >  	};
> > >  	static const int bxt_rates[] = {
> > >  		162000, 216000, 243000, 270000, 324000, 432000, 540000
> > > --
> > > 2.25.1
> > 
> > --
> > Ville Syrjälä
> > Intel

-- 
Ville Syrjälä
Intel