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drm/i915: Remove 10% cdclk guardband on BXT

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We don't need any pixel clock vs. cdclk guardband since HSW. BXT still
tries to add one though. Get rid of it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1462995892-32416-8-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
This commit is contained in:
Ville Syrjälä 2016-05-11 22:44:46 +03:00
parent 92891e45c3
commit 760e147726
1 changed files with 4 additions and 5 deletions
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9
drivers/gpu/drm/i915/intel_display.c
View File

@ -5901,16 +5901,15 @@ static int broxton_calc_cdclk(int max_pixclk)
{
/*
* 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;