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

[Murthy, Arun R]

> -----Original Message-----
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Sent: Monday, May 6, 2024 5:51 PM
> To: Murthy, Arun R <arun.r.murthy at intel.com>
> Cc: intel-gfx at lists.freedesktop.org; Nikula, Jani <jani.nikula at intel.com>
> Subject: Re: [PATCH] drm/i915/display/dp: Remove UHBR13.5 for icl
> 
> On Mon, May 06, 2024 at 12:15:13PM +0000, Murthy, Arun R wrote:
> >
> > > -----Original Message-----
> > > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > > Sent: Monday, May 6, 2024 5:36 PM
> > > To: Murthy, Arun R <arun.r.murthy at intel.com>
> > > Cc: intel-gfx at lists.freedesktop.org; Nikula, Jani
> > > <jani.nikula at 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.
> 
This is the limitation from the retimer hardware.

Thanks and Regards,
Arun R Murthy
-------------------
> >
> > Thanks and Regards,
> > Arun R Murthy
> > -------------------
> > >
> > > >
> > > > Signed-off-by: Arun R Murthy <arun.r.murthy at 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