Re: [Intel-gfx] [PATCH] drm/i915/dp: take LTTPR into account in 128b/132b rates

2021-10-07 Thread Jani Nikula
On Thu, 07 Oct 2021, Ville Syrjälä wrote: > On Thu, Oct 07, 2021 at 01:57:27PM +0300, Jani Nikula wrote: >> Limit the supported UHBR rates based on the repeater support, if there >> are repeaters. >> >> This should be done in DP helper level, but that requires an overhaul of >> the LTTPR handling

Re: [Intel-gfx] [PATCH] drm/i915/dp: take LTTPR into account in 128b/132b rates

2021-10-07 Thread Ville Syrjälä
On Thu, Oct 07, 2021 at 01:57:27PM +0300, Jani Nikula wrote: > Limit the supported UHBR rates based on the repeater support, if there > are repeaters. > > This should be done in DP helper level, but that requires an overhaul of > the LTTPR handling, as the max rate is not enough to represent how >

[Intel-gfx] [PATCH] drm/i915/dp: take LTTPR into account in 128b/132b rates

2021-10-07 Thread Jani Nikula
Limit the supported UHBR rates based on the repeater support, if there are repeaters. This should be done in DP helper level, but that requires an overhaul of the LTTPR handling, as the max rate is not enough to represent how 128b/132b rates may be masked along the way. Curiously, the spec says: