Commit 760e1477 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915: Remove 10% cdclk guardband on BXT 



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: default avatarVille 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: default avatarImre Deak <imre.deak@intel.com>
parent 92891e45

drivers/gpu/drm/i915/intel_display.c

+4 −5
Original line number Diff line number Diff line
@@ -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;

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