drm/i915/kbl: Add WaDisableDynamicCreditSharing

[cascardo/linux.git] / drivers / gpu / drm / i915 / intel_dpll_mgr.c

diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c
index 3ac7059..58f60b2 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
@@ -366,6 +366,9 @@ ibx_get_dpll(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
                                             DPLL_ID_PCH_PLL_B);
        }
 
+       if (!pll)
+               return NULL;
+
        /* reference the pll */
        intel_reference_shared_dpll(pll, crtc_state);
 
@@ -1374,8 +1377,8 @@ static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
        I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
        POSTING_READ(BXT_PORT_PLL_ENABLE(port));
 
-       if (wait_for_atomic_us((I915_READ(BXT_PORT_PLL_ENABLE(port)) &
-                       PORT_PLL_LOCK), 200))
+       if (wait_for_us((I915_READ(BXT_PORT_PLL_ENABLE(port)) & PORT_PLL_LOCK),
+                       200))
                DRM_ERROR("PLL %d not locked\n", port);
 
        /*