From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu, 4 Apr 2013 20:20:33 +0000 (+0200)
Subject: drm/i915: fix FP CB tuning limits for lvds
X-Git-Tag: v3.12-rc1~464^2~131^2~203
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f0b4405687f8b35173575be8493bf2af84b85091;p=kernel%2Fkernel-generic.git

drm/i915: fix FP CB tuning limits for lvds

Only on IBX should we set the limiting factor to 25 unconditionally
for dual-channel mode, on CPT/PPT 25 only applies when the lvds
refclock is 100MHz.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index baacfcb..f235e8a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5503,7 +5503,7 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
 	if (is_lvds) {
 		if ((intel_panel_use_ssc(dev_priv) &&
 		     dev_priv->lvds_ssc_freq == 100) ||
-		    intel_is_dual_link_lvds(dev))
+		    (HAS_PCH_IBX(dev) && intel_is_dual_link_lvds(dev)))
 			factor = 25;
 	} else if (is_sdvo && is_tv)
 		factor = 20;