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
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2490fadf..aabef5e 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;