drm/i915: Convert wait_for(I915_READ(reg)) to intel_wait_for_register()

By using the out-of-line intel_wait_for_register() not only do we can
efficiency from using the hybrid wait_for() contained within, but we
avoid code bloat from the numerous inlined loops, in total (all patches):

   text    data     bss     dec     hex filename
1078551    4557     416 1083524  108884 drivers/gpu/drm/i915/i915.ko
1070775    4557     416 1075748  106a24 drivers/gpu/drm/i915/i915.ko

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467297225-21379-50-git-send-email-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index cc8766d..9625d03 100644 (file)
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -703,8 +703,11 @@ static void skl_set_power_well(struct drm_i915_private *dev_priv,
 
        switch (power_well->data) {
        case SKL_DISP_PW_1:
-               if (wait_for((I915_READ(SKL_FUSE_STATUS) &
-                       SKL_FUSE_PG0_DIST_STATUS), 1)) {
+               if (intel_wait_for_register(dev_priv,
+                                           SKL_FUSE_STATUS,
+                                           SKL_FUSE_PG0_DIST_STATUS,
+                                           SKL_FUSE_PG0_DIST_STATUS,
+                                           1)) {
                        DRM_ERROR("PG0 not enabled\n");
                        return;
                }