On Wed, Aug 18, 2021 at 07:17:12PM +0300, Imre Deak wrote: > On Wed, Aug 18, 2021 at 06:09:43PM +0300, Lee, Shawn C wrote: > > On Tue, 2021-07-07, Lee Shawn C <shawn.c.lee@xxxxxxxxx> wrote: > > >On Tue, 2021-07-07, Almahallawy, Khaled <khaled.almahallawy@xxxxxxxxx> wrote: > > >>I believe Imre's LT fallback: > > >>https://github.com/ideak/linux/commits/linktraining-fallback-fix and Chrome user space fix: > > >>https://chromium-review.googlesource.com/c/chromium/src/+/3003487 > > >>should address Chrome concerns for LT failure and LTTPRs > > >> > > > > > >Thanks for comment! The new fallback patch should help on this DPRX problem. > > >One more thing. If driver did not handle DPRX link train failed properly. > > >It would impact link layer compliance test case in below. > > > > > >400.3.1.3 > > >400.3.1.4 > > >400.3.1.6 > > >400.3.1.12 > > >400.3.1.13 > > >400.3.1.14 > > > > > >Best regards, > > >Shawn > > > > > > > Hi all, before Imre's patch series land on upstream driver. The link train failed > > handling works for LTTPR only. But DPRX does not. Could you please consider to have > > this change as temporary solution? Thanks! > > I sent already fixing this, see > https://lore.kernel.org/intel-gfx/20201027133600.3656665-1-imre.deak@xxxxxxxxx/ > > but it fell through the cracks. Applied now your patch, thanks. We seem to have a tgl that fails consistently at DPRX link training: https://intel-gfx-ci.01.org/tree/drm-tip/fi-tgl-1115g4.html Previously the error went unnoticed. -- Ville Syrjälä Intel
