DUAL_TFT_USAGE     44 drivers/staging/sm750fb/ddk750_display.h #define DUAL_TFT_ON (BIT(DUAL_TFT_OFFSET) | DUAL_TFT_USAGE)
DUAL_TFT_USAGE     45 drivers/staging/sm750fb/ddk750_display.h #define DUAL_TFT_OFF ((0 << DUAL_TFT_OFFSET) | DUAL_TFT_USAGE)