On Wed, 08 May 2024, "Murthy, Arun R" <arun.r.murthy@xxxxxxxxx> wrote:
>> -----Original Message-----
>> From: Nikula, Jani <jani.nikula@xxxxxxxxx>
>> Sent: Wednesday, May 8, 2024 5:18 PM
>> To: Murthy, Arun R <arun.r.murthy@xxxxxxxxx>; Ville Syrjälä
>> <ville.syrjala@xxxxxxxxxxxxxxx>
>> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>> Subject: RE: [PATCH] drm/i915/display/dp: Remove UHBR13.5 for icl
>>
>> On Wed, 08 May 2024, "Murthy, Arun R" <arun.r.murthy@xxxxxxxxx> wrote:
>> >> -----Original Message-----
>> >> From: Nikula, Jani <jani.nikula@xxxxxxxxx>
>> >> Sent: Wednesday, May 8, 2024 3:29 PM
>> >> To: Murthy, Arun R <arun.r.murthy@xxxxxxxxx>; Ville Syrjälä
>> >> <ville.syrjala@xxxxxxxxxxxxxxx>
>> >> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>> >> Subject: RE: [PATCH] drm/i915/display/dp: Remove UHBR13.5 for icl
>> >>
>> >> On Wed, 08 May 2024, "Murthy, Arun R" <arun.r.murthy@xxxxxxxxx> wrote:
>> >> > This is the limitation from the retimer hardware.
>> >>
>> >> The commit message needs to reflect this.
>> >>
>> >> Do all units have a retimer with the limitation? Or could you have a
>> >> DG2 without the limitation? Do we need to check for that instead of
>> >> blanket removal of UHBR 13.5 for DG2?
>> >>
>> > Changed the commit msg as below
>> >
>> > Display 12+ hardware supports UHBR13.5
>>
>> Not true.
>>
>> > but due to the retimer constraints platform doesn't support UHBR13.5.
>>
>> Which platform?
>>
>> > This is the same for mtl and UHBR13.5 is removed as part of the commit
>> > caf3d748f646 ("drm/i915/dp: Remove support for UHBR13.5") This patch
>> removes UHBR13.5 support for icl/dg2.
>>
>> ICL does not support UHBR 13.5.
>>
>
> Per bspec display12+ has uhbr13.5 Due to the retimer constraint none of the Intel platforms supports UHBR13.5
> Uhbr15.3 is already removed for mtl platform as part of commit caf3d748f646 ("drm/i915/dp: Remove support for UHBR13.5") this patch will remove for dg2.
Where does display 12+ come from?
We support UHBR starting from DG2 and display version 14+, right?
BR,
Jani.
>
> Thanks and Regards,
> Arun R Murthy
> --------------------
>> BR,
>> Jani.
>>
>> >
>> > Thanks and Regards,
>> > Arun R Murthy
>> > --------------------
>> >> BR,
>> >> Jani.
>> >>
>> >>
>> >> --
>> >> Jani Nikula, Intel
>>
>> --
>> Jani Nikula, Intel
--
Jani Nikula, Intel
