[PATCH 1/3] drm/i915: Remove 10% cdclk guardband from BXT

ville.syrjala
2015-10-27T13:23:41Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

BXT doesn't need any cdclk guardband, so don't use any.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bc1907e..b8095be 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5937,16 +5937,15 @@ static int broxton_calc_cdclk(struct drm_i915_private *dev_priv,
{
/*
* FIXME:
- * - remove the guardband, it's not needed on BXT
* - set 19.2MHz bypass frequency if there are no active pipes
*/
- if (max_pixclk > 576000*9/10)
+ if (max_pixclk > 576000)
return 624000;
- else if (max_pixclk > 384000*9/10)
+ else if (max_pixclk > 384000)
return 576000;
- else if (max_pixclk > 288000*9/10)
+ else if (max_pixclk > 288000)
return 384000;
- else if (max_pixclk > 144000*9/10)
+ else if (max_pixclk > 144000)
return 288000;
else
return 144000;
--
2.4.10