1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index b8c096b4a1de..63aca49d11a8 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1139,10 +1139,13 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder)
 
 int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv)
 {
-        if (I915_READ(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT)
+        uint32_t lcpll = I915_READ(LCPLL_CTL);
+
+        if (lcpll & LCPLL_CD_SOURCE_FCLK)
+                return 800000;
+        else if (I915_READ(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT)
                 return 450000;
-        else if ((I915_READ(LCPLL_CTL) & LCPLL_CLK_FREQ_MASK) ==
-                 LCPLL_CLK_FREQ_450)
+        else if ((lcpll & LCPLL_CLK_FREQ_MASK) == LCPLL_CLK_FREQ_450)
                 return 450000;
         else if (IS_ULT(dev_priv->dev))
                 return 337500;