diff --git a/test/mpi_enc_test.c b/test/mpi_enc_test.c
index c651a767..f23bd7a1 100644
--- a/test/mpi_enc_test.c
+++ b/test/mpi_enc_test.c
@@ -419,14 +419,14 @@ MPP_RET test_mpp_setup_legacy(MpiEncTestData *p)
         }
     }
 
-    RK_U32 gop_mode = 0;
+    RK_U32 gop_mode = p->gop_mode;
 
-    mpp_env_get_u32("gop_mode", &gop_mode, 0);
-    if (p->gop_mode || gop_mode) {
+    mpp_env_get_u32("gop_mode", &gop_mode, gop_mode);
+    if (gop_mode) {
         MppEncRefCfg ref;
 
         mpp_enc_ref_cfg_init(&ref);
-        mpi_enc_gen_ref_cfg(ref);
+        mpi_enc_gen_ref_cfg(ref, gop_mode);
         ret = mpi->control(ctx, MPP_ENC_SET_REF_CFG, ref);
         if (ret) {
             mpp_err("mpi control enc set ref cfg failed ret %d\n", ret);
@@ -604,14 +604,14 @@ MPP_RET test_mpp_enc_cfg_setup(MpiEncTestData *p)
         }
     }
 
-    RK_U32 gop_mode = 0;
+    RK_U32 gop_mode = p->gop_mode;
 
-    mpp_env_get_u32("gop_mode", &gop_mode, 0);
-    if (p->gop_mode || gop_mode) {
+    mpp_env_get_u32("gop_mode", &gop_mode, gop_mode);
+    if (gop_mode) {
         MppEncRefCfg ref;
 
         mpp_enc_ref_cfg_init(&ref);
-        mpi_enc_gen_ref_cfg(ref);
+        mpi_enc_gen_ref_cfg(ref, gop_mode);
         ret = mpi->control(ctx, MPP_ENC_SET_REF_CFG, ref);
         if (ret) {
             mpp_err("mpi control enc set ref cfg failed ret %d\n", ret);
diff --git a/utils/mpi_enc_utils.c b/utils/mpi_enc_utils.c
index 6047c814..35b88da3 100644
--- a/utils/mpi_enc_utils.c
+++ b/utils/mpi_enc_utils.c
@@ -319,88 +319,180 @@ MPP_RET mpi_enc_test_cmd_put(MpiEncTestArgs* cmd)
     return MPP_OK;
 }
 
-MPP_RET mpi_enc_gen_ref_cfg(MppEncRefCfg ref)
+MPP_RET mpi_enc_gen_ref_cfg(MppEncRefCfg ref, RK_S32 gop_mode)
 {
     MppEncRefLtFrmCfg lt_ref[4];
     MppEncRefStFrmCfg st_ref[16];
-    RK_S32 lt_cnt = 1;
-    RK_S32 st_cnt = 9;
+    RK_S32 lt_cnt = 0;
+    RK_S32 st_cnt = 0;
     MPP_RET ret = MPP_OK;
 
     memset(&lt_ref, 0, sizeof(lt_ref));
     memset(&st_ref, 0, sizeof(st_ref));
 
-    ret = mpp_enc_ref_cfg_set_cfg_cnt(ref, lt_cnt, st_cnt);
+    switch (gop_mode) {
+    case 3 : {
+        // tsvc4
+        //      /-> P1      /-> P3        /-> P5      /-> P7
+        //     /           /             /           /
+        //    //--------> P2            //--------> P6
+        //   //                        //
+        //  ///---------------------> P4
+        // ///
+        // P0 ------------------------------------------------> P8
+        lt_cnt = 1;
 
-    /* set 8 frame lt-ref gap */
-    lt_ref[0].lt_idx        = 0;
-    lt_ref[0].temporal_id   = 0;
-    lt_ref[0].ref_mode      = REF_TO_PREV_LT_REF;
-    lt_ref[0].lt_gap        = 8;
-    lt_ref[0].lt_delay      = 0;
+        /* set 8 frame lt-ref gap */
+        lt_ref[0].lt_idx        = 0;
+        lt_ref[0].temporal_id   = 0;
+        lt_ref[0].ref_mode      = REF_TO_PREV_LT_REF;
+        lt_ref[0].lt_gap        = 8;
+        lt_ref[0].lt_delay      = 0;
 
-    ret = mpp_enc_ref_cfg_add_lt_cfg(ref, 1, lt_ref);
+        st_cnt = 9;
+        /* set tsvc4 st-ref struct */
+        /* st 0 layer 0 - ref */
+        st_ref[0].is_non_ref    = 0;
+        st_ref[0].temporal_id   = 0;
+        st_ref[0].ref_mode      = REF_TO_TEMPORAL_LAYER;
+        st_ref[0].ref_arg       = 0;
+        st_ref[0].repeat        = 0;
+        /* st 1 layer 3 - non-ref */
+        st_ref[1].is_non_ref    = 1;
+        st_ref[1].temporal_id   = 3;
+        st_ref[1].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[1].ref_arg       = 0;
+        st_ref[1].repeat        = 0;
+        /* st 2 layer 2 - ref */
+        st_ref[2].is_non_ref    = 0;
+        st_ref[2].temporal_id   = 2;
+        st_ref[2].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[2].ref_arg       = 0;
+        st_ref[2].repeat        = 0;
+        /* st 3 layer 3 - non-ref */
+        st_ref[3].is_non_ref    = 1;
+        st_ref[3].temporal_id   = 3;
+        st_ref[3].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[3].ref_arg       = 0;
+        st_ref[3].repeat        = 0;
+        /* st 4 layer 1 - ref */
+        st_ref[4].is_non_ref    = 0;
+        st_ref[4].temporal_id   = 1;
+        st_ref[4].ref_mode      = REF_TO_PREV_LT_REF;
+        st_ref[4].ref_arg       = 0;
+        st_ref[4].repeat        = 0;
+        /* st 5 layer 3 - non-ref */
+        st_ref[5].is_non_ref    = 1;
+        st_ref[5].temporal_id   = 3;
+        st_ref[5].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[5].ref_arg       = 0;
+        st_ref[5].repeat        = 0;
+        /* st 6 layer 2 - ref */
+        st_ref[6].is_non_ref    = 0;
+        st_ref[6].temporal_id   = 2;
+        st_ref[6].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[6].ref_arg       = 0;
+        st_ref[6].repeat        = 0;
+        /* st 7 layer 3 - non-ref */
+        st_ref[7].is_non_ref    = 1;
+        st_ref[7].temporal_id   = 3;
+        st_ref[7].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[7].ref_arg       = 0;
+        st_ref[7].repeat        = 0;
+        /* st 8 layer 0 - ref */
+        st_ref[8].is_non_ref    = 0;
+        st_ref[8].temporal_id   = 0;
+        st_ref[8].ref_mode      = REF_TO_TEMPORAL_LAYER;
+        st_ref[8].ref_arg       = 0;
+        st_ref[8].repeat        = 0;
+    } break;
+    case 2 : {
+        // tsvc3
+        //     /-> P1      /-> P3
+        //    /           /
+        //   //--------> P2
+        //  //
+        // P0/---------------------> P4
+        lt_cnt = 0;
 
-    /* set tsvc4 st-ref struct */
-    /* st 0 layer 0 - ref */
-    st_ref[0].is_non_ref    = 0;
-    st_ref[0].temporal_id   = 0;
-    st_ref[0].ref_mode      = REF_TO_TEMPORAL_LAYER;
-    st_ref[0].ref_arg       = 0;
-    st_ref[0].repeat        = 0;
-    /* st 1 layer 3 - non-ref */
-    st_ref[1].is_non_ref    = 1;
-    st_ref[1].temporal_id   = 3;
-    st_ref[1].ref_mode      = REF_TO_PREV_REF_FRM;
-    st_ref[1].ref_arg       = 0;
-    st_ref[1].repeat        = 0;
-    /* st 2 layer 2 - ref */
-    st_ref[2].is_non_ref    = 0;
-    st_ref[2].temporal_id   = 2;
-    st_ref[2].ref_mode      = REF_TO_PREV_REF_FRM;
-    st_ref[2].ref_arg       = 0;
-    st_ref[2].repeat        = 0;
-    /* st 3 layer 3 - non-ref */
-    st_ref[3].is_non_ref    = 1;
-    st_ref[3].temporal_id   = 3;
-    st_ref[3].ref_mode      = REF_TO_PREV_REF_FRM;
-    st_ref[3].ref_arg       = 0;
-    st_ref[3].repeat        = 0;
-    /* st 4 layer 1 - ref */
-    st_ref[4].is_non_ref    = 0;
-    st_ref[4].temporal_id   = 1;
-    st_ref[4].ref_mode      = REF_TO_PREV_LT_REF;
-    st_ref[4].ref_arg       = 0;
-    st_ref[4].repeat        = 0;
-    /* st 5 layer 3 - non-ref */
-    st_ref[5].is_non_ref    = 1;
-    st_ref[5].temporal_id   = 3;
-    st_ref[5].ref_mode      = REF_TO_PREV_REF_FRM;
-    st_ref[5].ref_arg       = 0;
-    st_ref[5].repeat        = 0;
-    /* st 6 layer 2 - ref */
-    st_ref[6].is_non_ref    = 0;
-    st_ref[6].temporal_id   = 2;
-    st_ref[6].ref_mode      = REF_TO_PREV_REF_FRM;
-    st_ref[6].ref_arg       = 0;
-    st_ref[6].repeat        = 0;
-    /* st 7 layer 3 - non-ref */
-    st_ref[7].is_non_ref    = 1;
-    st_ref[7].temporal_id   = 3;
-    st_ref[7].ref_mode      = REF_TO_PREV_REF_FRM;
-    st_ref[7].ref_arg       = 0;
-    st_ref[7].repeat        = 0;
-    /* st 8 layer 0 - ref */
-    st_ref[8].is_non_ref    = 0;
-    st_ref[8].temporal_id   = 0;
-    st_ref[8].ref_mode      = REF_TO_TEMPORAL_LAYER;
-    st_ref[8].ref_arg       = 0;
-    st_ref[8].repeat        = 0;
+        st_cnt = 5;
+        /* set tsvc4 st-ref struct */
+        /* st 0 layer 0 - ref */
+        st_ref[0].is_non_ref    = 0;
+        st_ref[0].temporal_id   = 0;
+        st_ref[0].ref_mode      = REF_TO_TEMPORAL_LAYER;
+        st_ref[0].ref_arg       = 0;
+        st_ref[0].repeat        = 0;
+        /* st 1 layer 2 - non-ref */
+        st_ref[1].is_non_ref    = 1;
+        st_ref[1].temporal_id   = 2;
+        st_ref[1].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[1].ref_arg       = 0;
+        st_ref[1].repeat        = 0;
+        /* st 2 layer 1 - ref */
+        st_ref[2].is_non_ref    = 0;
+        st_ref[2].temporal_id   = 1;
+        st_ref[2].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[2].ref_arg       = 0;
+        st_ref[2].repeat        = 0;
+        /* st 3 layer 2 - non-ref */
+        st_ref[3].is_non_ref    = 1;
+        st_ref[3].temporal_id   = 2;
+        st_ref[3].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[3].ref_arg       = 0;
+        st_ref[3].repeat        = 0;
+        /* st 4 layer 0 - ref */
+        st_ref[4].is_non_ref    = 0;
+        st_ref[4].temporal_id   = 0;
+        st_ref[4].ref_mode      = REF_TO_TEMPORAL_LAYER;
+        st_ref[4].ref_arg       = 0;
+        st_ref[4].repeat        = 0;
+    } break;
+    case 1 : {
+        // tsvc2
+        //   /-> P1
+        //  /
+        // P0--------> P2
+        lt_cnt = 0;
 
-    ret = mpp_enc_ref_cfg_add_st_cfg(ref, 9, st_ref);
+        st_cnt = 3;
+        /* set tsvc4 st-ref struct */
+        /* st 0 layer 0 - ref */
+        st_ref[0].is_non_ref    = 0;
+        st_ref[0].temporal_id   = 0;
+        st_ref[0].ref_mode      = REF_TO_TEMPORAL_LAYER;
+        st_ref[0].ref_arg       = 0;
+        st_ref[0].repeat        = 0;
+        /* st 1 layer 2 - non-ref */
+        st_ref[1].is_non_ref    = 1;
+        st_ref[1].temporal_id   = 1;
+        st_ref[1].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[1].ref_arg       = 0;
+        st_ref[1].repeat        = 0;
+        /* st 2 layer 1 - ref */
+        st_ref[2].is_non_ref    = 0;
+        st_ref[2].temporal_id   = 0;
+        st_ref[2].ref_mode      = REF_TO_PREV_REF_FRM;
+        st_ref[2].ref_arg       = 0;
+        st_ref[2].repeat        = 0;
+    } break;
+    default : {
+        mpp_err_f("unsupport gop mode %d\n", gop_mode);
+    } break;
+    }
 
-    /* check and get dpb size */
-    ret = mpp_enc_ref_cfg_check(ref);
+    if (lt_cnt || st_cnt) {
+        ret = mpp_enc_ref_cfg_set_cfg_cnt(ref, lt_cnt, st_cnt);
+
+        if (lt_cnt)
+            ret = mpp_enc_ref_cfg_add_lt_cfg(ref, lt_cnt, lt_ref);
+
+        if (st_cnt)
+            ret = mpp_enc_ref_cfg_add_st_cfg(ref, st_cnt, st_ref);
+
+        /* check and get dpb size */
+        ret = mpp_enc_ref_cfg_check(ref);
+    }
 
     return ret;
 }
diff --git a/utils/mpi_enc_utils.h b/utils/mpi_enc_utils.h
index 27ccf01b..379a7895 100644
--- a/utils/mpi_enc_utils.h
+++ b/utils/mpi_enc_utils.h
@@ -55,7 +55,7 @@ extern "C" {
 
 RK_S32 mpi_enc_width_default_stride(RK_S32 width, MppFrameFormat fmt);
 
-MPP_RET mpi_enc_gen_ref_cfg(MppEncRefCfg ref);
+MPP_RET mpi_enc_gen_ref_cfg(MppEncRefCfg ref, RK_S32 gop_mode);
 MPP_RET mpi_enc_gen_osd_data(MppEncOSDData *osd_data, MppBuffer osd_buf, RK_U32 frame_cnt);
 MPP_RET mpi_enc_gen_osd_plt(MppEncOSDPlt *osd_plt, RK_U32 *table);