Images do rotate 180 degrees

HI_MPI_VPSS_GetChnAttr (VpssGrp VpssChn, & amp; PstChnAttr);

PstChnAttr. BFlip=HI_TRUE;
PstChnAttr. BMirror=HI_TRUE;

S32Ret=HI_MPI_VPSS_SetChnAttr (VpssGrp VpssChn, & amp; PstChnAttr);

There is no question of setting bMirror alone,

Is anyone know how to solve?