> -----Original Message----- > From: Nikula, Jani <jani.nikula@xxxxxxxxx> > Sent: Monday, June 26, 2023 6:02 PM > To: Murthy, Arun R <arun.r.murthy@xxxxxxxxx>; intel- > gfx@xxxxxxxxxxxxxxxxxxxxx > Cc: Deak, Imre <imre.deak@xxxxxxxxx>; Kahola, Mika > <mika.kahola@xxxxxxxxx> > Subject: RE: [PATCH] drm/i915/display/dp: Remove support for UHBR13.5 > > On Thu, 22 Jun 2023, "Murthy, Arun R" <arun.r.murthy@xxxxxxxxx> wrote: > >> -----Original Message----- > >> From: Nikula, Jani <jani.nikula@xxxxxxxxx> > >> Sent: Wednesday, June 21, 2023 2:27 PM > >> To: Murthy, Arun R <arun.r.murthy@xxxxxxxxx>; intel- > >> gfx@xxxxxxxxxxxxxxxxxxxxx > >> Cc: Deak, Imre <imre.deak@xxxxxxxxx>; Kahola, Mika > >> <mika.kahola@xxxxxxxxx>; Murthy, Arun R <arun.r.murthy@xxxxxxxxx> > >> Subject: Re: [PATCH] drm/i915/display/dp: Remove support for UHBR13.5 > >> > >> On Tue, 20 Jun 2023, Arun R Murthy <arun.r.murthy@xxxxxxxxx> wrote: > >> > As per the DP2.1 Spec support for UHBR13.5 is optional. Hence > >> > removing the support for UHBR13.5 > >> > >> That's just not a proper rationale. Please explain. > >> > > Programming for UHBR10 and UHBR20 is similar compared to UHBR13.5 As > > of now we have validated 10Gbps and 20Gbps. The spec also points out > > when 20Gbps is supported 13.5Gbps is optional so we have not > validated/implemented the UHBR13.5 Now we have the DP2.1 compatible > panel is market, expecting users can come up with UHBR13.5 not working. > Hence removing the support for 13.5Gbps for now. > > Maybe once we have support for UHBR13.5 in the driver we can enable > this. > > What's missing? > Port clock programming, pll values differs. This table has been in place but some corrections/recheck required. Thanks and Regards, Arun R Murthy --------------------
