drm/i915: fix intel_ddi_get_cdclk_freq for ULT machines

For now, this code is just used by the eDP AUX channel frequency.

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

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 669afcabe3b1..87c06f97fa89 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1161,6 +1161,8 @@ struct drm_i915_file_private {
 #define IS_VALLEYVIEW(dev)      (INTEL_INFO(dev)->is_valleyview)
 #define IS_HASWELL(dev) (INTEL_INFO(dev)->is_haswell)
 #define IS_MOBILE(dev)          (INTEL_INFO(dev)->is_mobile)
+#define IS_ULT(dev)             (IS_HASWELL(dev) && \
+                                 ((dev)->pci_device & 0xFF00) == 0x0A00)
 
 /*
  * The genX designation typically refers to the render engine, so render
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index d706d538e8b7..852012b6fc5b 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1309,6 +1309,8 @@ int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv)
         else if ((I915_READ(LCPLL_CTL) & LCPLL_CLK_FREQ_MASK) ==
                  LCPLL_CLK_FREQ_450)
                 return 450;
+        else if (IS_ULT(dev_priv->dev))
+                return 338;
         else
                 return 540;
 }