CCK_DISPLAY_CLOCK_CONTROL
CCK_DISPLAY_CLOCK_CONTROL,
val = vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL);
vlv_cck_write(dev_priv, CCK_DISPLAY_CLOCK_CONTROL, val);
if (wait_for((vlv_cck_read(dev_priv, CCK_DISPLAY_CLOCK_CONTROL) &