drm/i915/glk: Allow dotclock up to 2 * cdclk on geminilake

Geminilake has double wide pipes so it can output two pixels per CD
clock.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1480667037-11215-8-git-send-email-ander.conselvan.de.oliveira@intel.com

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2490fadfb7b4..aabef5e13bd4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5805,8 +5805,10 @@ static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv)
 {
         int max_cdclk_freq = dev_priv->max_cdclk_freq;
 
-        if (INTEL_INFO(dev_priv)->gen >= 9 ||
-            IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+        if (IS_GEMINILAKE(dev_priv))
+                return 2 * max_cdclk_freq;
+        else if (INTEL_INFO(dev_priv)->gen >= 9 ||
+                 IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
                 return max_cdclk_freq;
         else if (IS_CHERRYVIEW(dev_priv))
                 return max_cdclk_freq*95/100;
@@ -6563,9 +6565,9 @@ static int valleyview_calc_cdclk(struct drm_i915_private *dev_priv,
 
 static int glk_calc_cdclk(int max_pixclk)
 {
-        if (max_pixclk > 158400)
+        if (max_pixclk > 2 * 158400)
                 return 316800;
-        else if (max_pixclk > 79200)
+        else if (max_pixclk > 2 * 79200)
                 return 158400;
         else
                 return 79200;