diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 39984fb07fa901e178c27fccf16263e4d1de4d51..34e6bf3b114297242fefe1368a07a7b6fd353be4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1432,6 +1432,7 @@ static void ironlake_enable_pch_pll(struct intel_crtc *intel_crtc) assert_pch_pll_enabled(dev_priv, pll, NULL); return; } + WARN_ON(pll->on); DRM_DEBUG_KMS("enabling PCH PLL %x\n", pll->pll_reg); @@ -1470,6 +1471,7 @@ static void intel_disable_pch_pll(struct intel_crtc *intel_crtc) } assert_pch_pll_enabled(dev_priv, pll, NULL); + WARN_ON(!pll->on); if (--pll->active) return; @@ -3069,7 +3071,11 @@ static void intel_put_pch_pll(struct intel_crtc *intel_crtc) return; } - --pll->refcount; + if (--pll->refcount == 0) { + WARN_ON(pll->on); + WARN_ON(pll->active); + } + intel_crtc->pch_pll = NULL; }