VPSS无法正常获取VB

    // VB配置代码
    buf_attr.width = 2560;
    buf_attr.height = 1440;
    buf_attr.align = OT_DEFAULT_ALIGN;
    buf_attr.bit_width = OT_DATA_BIT_WIDTH_8;
    buf_attr.pixel_format = OT_PIXEL_FORMAT_YVU_SEMIPLANAR_420;
    buf_attr.compress_mode = OT_COMPRESS_MODE_SEG_COMPACT;
    buf_attr.video_format = OT_VIDEO_FORMAT_LINEAR;
    ot_common_get_pic_buf_cfg(&buf_attr, &calc_cfg);

    vb_cfg->common_pool[i].blk_cnt = 1;
    vb_cfg->common_pool[i].blk_size = calc_cfg.vb_size;

cat /dev/logmpp
<7>[    vb] [Func]:vb_user_sub_process [Line]:1794 [Info]:blk(1) in pool(2) is subed!
<7>[    vb] [Func]:vb_common_real_get_blk [Line]:983 [Info]:blk(1) in pool(2) is allocated by uid(0)!
<7>[    vb] [Func]:vb_search_comm_pool_by_size [Line]:1130 [Info]:no fit common pool!
<3>[  vpss] [func]:vpss_drv_prepare_vb_for_chn [line]:5176 [info]:grp0 chn0 get buffer fail,size 3740272!
<3>[  vpss] [func]:vpss_drv_online_prepare_frame_not_one_buf [line]:473 [info]:chn 0 get vb fail

cat /proc/umap/vb
pool_id phys_addr           virt_addr           pool_type owner   blk_sz    blk_cnt free    min_free reserve state   
1       0x4621f000          0x0                 common    common  3740416   1       0       0        0       idle    
blk   vi    vo    vgs   venc  vdec  h265e h264e vpss  dis   user  pciv  vfmw  gdc   avs   rect  match mcf   vda   vpp   aiisp uvc   svac3 get   free_bytes
0     0     0     0     0     0     0     0     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0     vpss  144
sum   0     0     0     0     0     0     0     1     0     0     0     0     0     0     0     0     0     0     0     0     0     0