From: Ville Syrjälä <[email protected]> Only the non-SSC reference is truly supported for the LCPLL. Assert that it is indeed selected.
Signed-off-by: Ville Syrjälä <[email protected]> --- drivers/gpu/drm/i915/intel_display_power.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display_power.c b/drivers/gpu/drm/i915/intel_display_power.c index 278a7edc94f5..bb9ef1cea5db 100644 --- a/drivers/gpu/drm/i915/intel_display_power.c +++ b/drivers/gpu/drm/i915/intel_display_power.c @@ -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) -- 2.21.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
