From: Daniel Vetter <daniel@ffwll.ch>
To: Takashi Iwai <tiwai@suse.de>
Cc: Arthur Ranyan <arthur.j.runyan@intel.com>,
intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH v2] drm/i915: Fix shifted screen on top of LVDS on IVY laptop
Date: Tue, 11 Dec 2012 12:54:11 +0100 [thread overview]
Message-ID: <20121211115411.GQ11556@phenom.ffwll.local> (raw)
In-Reply-To: <s5hpq2glvcq.wl%tiwai@suse.de>
On Tue, Dec 11, 2012 at 11:46:29AM +0100, Takashi Iwai wrote:
> The commit [23670b322: drm/i915: CPT+ pch transcoder workaround]
> caused a regression on some HP laptops with IvyBridge. The whole
> laptop screen is shifted downward for a few pixels constantly.
> The problem appears only on LVDS while DP and VGA seem unaffected.
> Also, the problem disappears once when go and back from S3.
> (S4 resume still shows the same problem.)
>
> This patch revives the minimum part the commit above dropped.
> For fixing this regression, only the setup of CHICKEN2 bit in
> cpt_init_clock_gating() is needed.
>
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Picked up for -fixes, thanks for the patch.
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
prev parent reply other threads:[~2012-12-11 11:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-11 10:46 [PATCH v2] drm/i915: Fix shifted screen on top of LVDS on IVY laptop Takashi Iwai
2012-12-11 11:54 ` Daniel Vetter [this message]
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