From 0d664bb20eb9b0bd229cc2b8f68314adcd1be280 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 5 Jun 2012 10:07:11 +0200 Subject: [PATCH] drm/i915: allow pipe A for lvds on gen4 Given the havoc the missing backlight pipe select code might have caused, let's try to re-enabled pipe A support for lvds on gen4 hw. Just to see what all blows up ... Note though that commit f69062e3eb07ca138f9f15e0074aa395ae1f75dd Author: Chris Wilson Date: Sat Dec 4 17:49:46 2010 +0000 drm/i915: Allow LVDS to be on pipe A for Ironlake+ claims that this caused tons of spurious wakeups somehow. More details can be found in the old revert: commit de66810eae8cefdb2524001738cdbe5dcaa39c8f Author: Chris Wilson Date: Tue Sep 7 23:39:28 2010 +0100 Revert "drm/i915: Allow LVDS on pipe A on gen4+" Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16307 Reviewed-by: Eugeni Dodonov Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_lvds.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index 492db7740de24..ab4d647926168 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -968,6 +968,8 @@ bool intel_lvds_init(struct drm_device *dev) intel_encoder->clone_mask = (1 << INTEL_LVDS_CLONE_BIT); if (HAS_PCH_SPLIT(dev)) intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); + else if (IS_GEN4(dev)) + intel_encoder->crtc_mask = (1 << 0) | (1 << 1); else intel_encoder->crtc_mask = (1 << 1); -- 2.39.5