drm/i915: only run hsw_power_well_post_enable when really needed

Only run it after we actually enable the power well. When we're
booting the machine there are cases where we run
hsw_power_well_post_enable without really needing, and even though
this is not causing any real bugs, it is unneeded and causes confusion
to people debugging interrupts.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 36749b9..39c33e0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -221,9 +221,9 @@ static void hsw_set_power_well(struct drm_i915_private *dev_priv,
                        if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
                                      HSW_PWR_WELL_STATE_ENABLED), 20))
                                DRM_ERROR("Timeout enabling power well\n");
+                       hsw_power_well_post_enable(dev_priv);
                }
 
-               hsw_power_well_post_enable(dev_priv);
        } else {
                if (enable_requested) {
                        I915_WRITE(HSW_PWR_WELL_DRIVER, 0);