MSMFB_IOCTL_MAGIC   20 include/linux/msm_mdp.h #define MSMFB_GRP_DISP          _IOW(MSMFB_IOCTL_MAGIC, 1, unsigned int)
MSMFB_IOCTL_MAGIC   21 include/linux/msm_mdp.h #define MSMFB_BLIT              _IOW(MSMFB_IOCTL_MAGIC, 2, unsigned int)