Re: [PATCH] Revert "drm/i915: try to train DP even harder"

From: Takashi Iwai
Date: Mon Mar 18 2013 - 05:10:56 EST

At Sun, 17 Mar 2013 22:59:22 +0100,
Daniel Vetter wrote:
> On Mon, Mar 11, 2013 at 06:40:16PM +0100, Takashi Iwai wrote:
> > This reverts commit 0d71068835e2610576d369d6d4cbf90e0f802a71.
> >
> > Not only that the commit introduces a bogus check (voltage_tries == 5
> > will never meet at the inserted code path), it brings the i915 driver
> > into an endless dp-train loop on HP Z1 desktop machine with IVY+eDP.
> >
> > At least reverting this commit recovers the framebuffer (but X is
> > still broken by other reasons...)
> >
> > Cc: <stable@xxxxxxxxxxxxxxx>
> > Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
> Picked up for -fixes, thanks for the patch.


> Adding Paulo since it's his
> patch. To assign proper blame please cc: relevant people when sending out
> reverts.

Well, Paulo was on Cc in the first post, but I dropped in the next
patch series since I've got no reply since then. (And intel-gfx was
on Cc, so he could read it anyway...)

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