From 281c114f8e80d3a86f18ccf7cb93460bad48fcbe Mon Sep 17 00:00:00 2001
From: Matt Roper <matthew.d.roper@intel.com>
Date: Tue, 5 Apr 2016 14:37:19 -0700
Subject: [PATCH] drm/i915/bxt: Set max cdclk frequency properly

intel_update_max_cdclk() doesn't have a switch case for Broxton, so
dev_priv->max_cdclk_freq gets set to whatever clock frequency we're
currently running at (e.g., 144 MHz) rather than the true maximum.  This
causes our max dotclock to also be set too low and in turn leads mode
verification to reject perfectly valid modes while loading EDID firmware
blobs.

Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459892239-14041-1-git-send-email-matthew.d.roper@intel.com
---
 drivers/gpu/drm/i915/intel_display.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index cb2d6af7a8394..7635025af73e8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5268,6 +5268,8 @@ static void intel_update_max_cdclk(struct drm_device *dev)
 			dev_priv->max_cdclk_freq = 450000;
 		else
 			dev_priv->max_cdclk_freq = 337500;
+	} else if (IS_BROXTON(dev)) {
+		dev_priv->max_cdclk_freq = 624000;
 	} else if (IS_BROADWELL(dev))  {
 		/*
 		 * FIXME with extra cooling we can allow
-- 
2.30.2