dispc_S31_32_to_s3_8
cpr->m[CSC_RR] = dispc_S31_32_to_s3_8(ctm->matrix[0]);
cpr->m[CSC_RG] = dispc_S31_32_to_s3_8(ctm->matrix[1]);
cpr->m[CSC_RB] = dispc_S31_32_to_s3_8(ctm->matrix[2]);
cpr->m[CSC_GR] = dispc_S31_32_to_s3_8(ctm->matrix[3]);
cpr->m[CSC_GG] = dispc_S31_32_to_s3_8(ctm->matrix[4]);
cpr->m[CSC_GB] = dispc_S31_32_to_s3_8(ctm->matrix[5]);
cpr->m[CSC_BR] = dispc_S31_32_to_s3_8(ctm->matrix[6]);
cpr->m[CSC_BG] = dispc_S31_32_to_s3_8(ctm->matrix[7]);
cpr->m[CSC_BB] = dispc_S31_32_to_s3_8(ctm->matrix[8]);