Re: [Intel-gfx] [PATCH 1/3] drm/dp: add helpers to read link training delays

2021-10-19 Thread Jani Nikula
On Mon, 18 Oct 2021, Maxime Ripard wrote: > Hi Jani, > > On Fri, Oct 15, 2021 at 06:21:35PM +0300, Jani Nikula wrote: >> On Thu, 14 Oct 2021, Jani Nikula wrote: >> > The link training delays are different and/or available in different >> > DPCD offsets depending on: >> > >> > - Clock recovery vs.

Re: [Intel-gfx] [PATCH 1/3] drm/dp: add helpers to read link training delays

2021-10-18 Thread Maxime Ripard
Hi Jani, On Fri, Oct 15, 2021 at 06:21:35PM +0300, Jani Nikula wrote: > On Thu, 14 Oct 2021, Jani Nikula wrote: > > The link training delays are different and/or available in different > > DPCD offsets depending on: > > > > - Clock recovery vs. channel equalization > > - DPRX vs. LTTPR > > - 128b

Re: [Intel-gfx] [PATCH 1/3] drm/dp: add helpers to read link training delays

2021-10-15 Thread Jani Nikula
On Thu, 14 Oct 2021, Jani Nikula wrote: > The link training delays are different and/or available in different > DPCD offsets depending on: > > - Clock recovery vs. channel equalization > - DPRX vs. LTTPR > - 128b/132b vs. 8b/10b > - DPCD 1.4+ vs. earlier > > Add helpers to get the correct delays

[Intel-gfx] [PATCH 1/3] drm/dp: add helpers to read link training delays

2021-10-14 Thread Jani Nikula
The link training delays are different and/or available in different DPCD offsets depending on: - Clock recovery vs. channel equalization - DPRX vs. LTTPR - 128b/132b vs. 8b/10b - DPCD 1.4+ vs. earlier Add helpers to get the correct delays in us, reading DPCD if necessary. This is more straightfo