diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7a40427823c7..a2c8cb360ae8 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6033,6 +6033,10 @@ void hsw_restore_lcpll(struct drm_i915_private *dev_priv) LCPLL_POWER_DOWN_ALLOW)) == LCPLL_PLL_LOCK) return; + /* Make sure we're not on PC8 state before disabling PC8, otherwise + * we'll hang the machine! */ + dev_priv->uncore.funcs.force_wake_get(dev_priv); + if (val & LCPLL_POWER_DOWN_ALLOW) { val &= ~LCPLL_POWER_DOWN_ALLOW; I915_WRITE(LCPLL_CTL, val); @@ -6060,6 +6064,8 @@ void hsw_restore_lcpll(struct drm_i915_private *dev_priv) LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1)) DRM_ERROR("Switching back to LCPLL failed\n"); } + + dev_priv->uncore.funcs.force_wake_put(dev_priv); } static void haswell_modeset_global_resources(struct drm_device *dev) |