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/1467297225-21379-18-git-send-email-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 187e703a1c45134e73b43d43c20164ce3710d616..cb7d49c34eb3d2888968ed6379d016fae015383d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4465,7 +4465,9 @@ void hsw_enable_ips(struct intel_crtc *crtc)
                 * and don't wait for vblanks until the end of crtc_enable, then
                 * the HW state readout code will complain that the expected
                 * IPS_CTL value is not the one we read. */
-               if (wait_for(I915_READ_NOTRACE(IPS_CTL) & IPS_ENABLE, 50))
+               if (intel_wait_for_register(dev_priv,
+                                           IPS_CTL, IPS_ENABLE, IPS_ENABLE,
+                                           50))
                        DRM_ERROR("Timed out waiting for IPS enable\n");
        }
 }