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 @@
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;