linux-kernel - [128/129] Revert "drm/i915: Allow LVDS on pipe A on gen4+"

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Message-Id: <20100918191308.252021070@clark.site>
Date:	Sat, 18 Sep 2010 12:13:46 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Chris Wilson <chris@...is-wilson.co.uk>,
	Adam Jackson <ajax@...hat.com>
Subject: [128/129] Revert "drm/i915: Allow LVDS on pipe A on gen4+"

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Chris Wilson <chris@...is-wilson.co.uk>

commit 12e8ba25ef52f19e7a42e61aecb3c1fef83b2a82 upstream.

This reverts commit 0f3ee801b332d6ff22285386675fe5aaedf035c3.

Enabling LVDS on pipe A was causing excessive wakeups on otherwise idle
systems due to i915 interrupts. So restrict the LVDS to pipe B once more,
whilst the issue is properly diagnosed.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16307
Reported-and-tested-by: Enrico Bandiello <enban@...tal.uv.es>
Poked-by: Florian Mickler <florian@...kler.org>
Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Cc: Adam Jackson <ajax@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/i915/intel_lvds.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -988,8 +988,6 @@ void intel_lvds_init(struct drm_device *
 
 	intel_encoder->clone_mask = (1 << INTEL_LVDS_CLONE_BIT);
 	intel_encoder->crtc_mask = (1 << 1);
-	if (IS_I965G(dev))
-		intel_encoder->crtc_mask |= (1 << 0);
 	drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
 	drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
 	connector->display_info.subpixel_order = SubPixelHorizontalRGB;


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