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/1467297225-21379-4-git-send-email-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 51eb1cd..fb5758f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2568,13 +2568,15 @@ static int vlv_allow_gt_wake(struct drm_i915_private *dev_priv, bool allow)
        I915_WRITE(VLV_GTLC_WAKE_CTRL, val);
        POSTING_READ(VLV_GTLC_WAKE_CTRL);
 
-#define COND (!!(I915_READ(VLV_GTLC_PW_STATUS) & VLV_GTLC_ALLOWWAKEACK) == \
-             allow)
-       err = wait_for(COND, 1);
+       err = intel_wait_for_register(dev_priv,
+                                     VLV_GTLC_PW_STATUS,
+                                     VLV_GTLC_ALLOWWAKEACK,
+                                     allow,
+                                     1);
        if (err)
                DRM_ERROR("timeout disabling GT waking\n");
+
        return err;
-#undef COND
 }
 
 static int vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,