[Intel-gfx] [PATCH v5 2/2] drm/i915: Check DP no aux transaction bit on link training

Thierry Reding thierry.reding at gmail.com
Mon Jan 4 09:27:54 PST 2016

On Tue, Dec 22, 2015 at 04:53:41PM +0100, Lukas Wunner wrote:
> Hi Mika,
> On Mon, Dec 21, 2015 at 01:39:15PM +0200, Mika Kahola wrote:
> > Check if no AUX transactions are required on DP link training.
> > If this bit is set, we can reuse the known good drive current
> > and pre-emphasis level from the last "full" link training.

The commit message here isn't entirely accurate. You still need AUX
transactions to configure the link according to the values obtained
from the last full training sequence.

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