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

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Message-ID: <20130317215922.GH9021@phenom.ffwll.local>
Date:	Sun, 17 Mar 2013 22:59:22 +0100
From:	Daniel Vetter <daniel@...ll.ch>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Daniel Vetter <daniel.vetter@...ll.ch>,
	Paulo Zanoni <paulo.r.zanoni@...el.com>,
	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Revert "drm/i915: try to train DP even harder"

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@...r.kernel.org>
> Signed-off-by: Takashi Iwai <tiwai@...e.de>
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.

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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