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/1467297225-21379-17-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 99e8c8e..187e703 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1959,7 +1959,9 @@ static void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
        val &= ~TRANS_ENABLE;
        I915_WRITE(LPT_TRANSCONF, val);
        /* wait for PCH transcoder off, transcoder state */
-       if (wait_for((I915_READ(LPT_TRANSCONF) & TRANS_STATE_ENABLE) == 0, 50))
+       if (intel_wait_for_register(dev_priv,
+                                   LPT_TRANSCONF, TRANS_STATE_ENABLE, 0,
+                                   50))
                DRM_ERROR("Failed to disable PCH transcoder\n");
 
        /* Workaround: clear timing override bit. */