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Commit 20f0ec16 authored by Jesse Barnes's avatar Jesse Barnes Committed by Daniel Vetter
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drm/i915: fix WRPLL clock calculation 



Forgot to convert to using the refclk variable when I added refclk
readout support, and Paulo noticed the resulting calculation was off due
to the way p & r are stored.

Reported-by: default avatarPaulo Zanoni <przanoni@gmail.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent f113d750

drivers/gpu/drm/i915/intel_ddi.c

+2 −1
Original line number Diff line number Diff line
@@ -663,7 +663,8 @@ static int intel_ddi_calc_wrpll_link(struct drm_i915_private *dev_priv, 
	p = (wrpll & WRPLL_DIVIDER_POST_MASK) >> WRPLL_DIVIDER_POST_SHIFT;

	n = (wrpll & WRPLL_DIVIDER_FB_MASK) >> WRPLL_DIVIDER_FB_SHIFT;



	return (LC_FREQ * n) / (p * r);

	/* Convert to KHz, p & r have a fixed point portion */

	return (refclk * n * 100) / (p * r);

}



static void intel_ddi_clock_get(struct intel_encoder *encoder,