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/1467297225-21379-5-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 fb5758f..c580e24 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2588,8 +2588,7 @@ static int vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
 
        mask = VLV_GTLC_PW_MEDIA_STATUS_MASK | VLV_GTLC_PW_RENDER_STATUS_MASK;
        val = wait_for_on ? mask : 0;
-#define COND ((I915_READ(VLV_GTLC_PW_STATUS) & mask) == val)
-       if (COND)
+       if ((I915_READ(VLV_GTLC_PW_STATUS) & mask) == val)
                return 0;
 
        DRM_DEBUG_KMS("waiting for GT wells to go %s (%08x)\n",
@@ -2600,13 +2599,14 @@ static int vlv_wait_for_gt_wells(struct drm_i915_private *dev_priv,
         * RC6 transitioning can be delayed up to 2 msec (see
         * valleyview_enable_rps), use 3 msec for safety.
         */
-       err = wait_for(COND, 3);
+       err = intel_wait_for_register(dev_priv,
+                                     VLV_GTLC_PW_STATUS, mask, val,
+                                     3);
        if (err)
                DRM_ERROR("timeout waiting for GT wells to go %s\n",
                          onoff(wait_for_on));
 
        return err;
-#undef COND
 }
 
 static void vlv_check_no_gt_access(struct drm_i915_private *dev_priv)