Commit d1707a96 authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915: Assert that HSW/BDW LCPLL is using the non-SSC reference 



Only the non-SSC reference is truly supported for the LCPLL. Assert
that it is indeed selected.

Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190604200933.29417-4-ville.syrjala@linux.intel.com


Reviewed-by: default avatarMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
parent 0f52c097

drivers/gpu/drm/i915/intel_display_power.c

+3 −0
Original line number Diff line number Diff line
@@ -3665,6 +3665,9 @@ static void hsw_assert_cdclk(struct drm_i915_private *dev_priv) 


	if (val & LCPLL_PLL_DISABLE)

		DRM_ERROR("LCPLL is disabled\n");



	if ((val & LCPLL_REF_MASK) != LCPLL_REF_NON_SSC)

		DRM_ERROR("LCPLL not using non-SSC reference\n");

}



static void assert_can_disable_lcpll(struct drm_i915_private *dev_priv)

CRA Git | Maintained and supported by SUSTech CRA and CCSE