TRANS_INTERLACE_MASK
#define TRANS_INTERLACE_PROGRESSIVE REG_FIELD_PREP(TRANS_INTERLACE_MASK, 0)
#define TRANS_INTERLACE_LEGACY_VSYNC_IBX REG_FIELD_PREP(TRANS_INTERLACE_MASK, 2) /* ibx */
#define TRANS_INTERLACE_INTERLACED REG_FIELD_PREP(TRANS_INTERLACE_MASK, 3)
val &= ~TRANS_INTERLACE_MASK;