DP_AUX_CH_CTL_PRECHARGE_2US_MASK 1467 drivers/gpu/drm/gma500/psb_intel_reg.h #define   DP_AUX_CH_CTL_PRECHARGE_2US_MASK   (0xf << 16)
DP_AUX_CH_CTL_PRECHARGE_2US_MASK 5552 drivers/gpu/drm/i915/i915_reg.h #define   DP_AUX_CH_CTL_PRECHARGE_2US_MASK   (0xf << 16)