TDA2HF: Set DSS parameter failed when Display_Link was creating

In PROCESSOR_SDK_VISION_03_08_00_00,i builded  a chain:

capture->vpe->display

vpe params was set as below:

static Void chains_vipSingleCam_Enc_Dec_SgxDisplay_SetVPEPrms(
VpeLink_CreateParams *pPrm,
UInt32 numLvdsCh,
UInt32 displayWidth,
UInt32 displayHeight,
UInt32 inputWidth,
UInt32 inputHeight
)
{
UInt16 chId;

pPrm->enableOut[0] = TRUE;

for(chId = 0; chId < numLvdsCh; chId++)
{
pPrm->chParams[chId].outParams[0].numBufsPerCh =
VPE_LINK_NUM_BUFS_PER_CH_DEFAULT;

pPrm->chParams[chId].outParams[0].width = displayWidth;
pPrm->chParams[chId].outParams[0].height = displayHeight;
pPrm->chParams[chId].outParams[0].dataFormat =SYSTEM_DF_RGB24_888 ;

pPrm->chParams[chId].scCfg.bypass = FALSE;
pPrm->chParams[chId].scCfg.nonLinear = FALSE;
pPrm->chParams[chId].scCfg.stripSize = 0;

pPrm->chParams[chId].scCropCfg.cropStartX = 32;
pPrm->chParams[chId].scCropCfg.cropStartY = 24;
pPrm->chParams[chId].scCropCfg.cropWidth = inputWidth-32;
pPrm->chParams[chId].scCropCfg.cropHeight = inputHeight-24;
}
}

then i got assert as below:

[HOST] [IPU1-0]     57.923595 s: CaptureLink_drvAllocAndQueueFrames:1553:FVID2_queue: captureVipHandle=0x9f11b880, frameList.numFrames=6, streamId=0
 [HOST] [IPU1-0]     57.923961 s:  CAPTURE: Create Done !!!
 [HOST] [IPU1-0]     57.924388 s:  VPE: Create in progress !!!
 [HOST] [IPU1-0]     57.925242 s: wwlog:vpe set flag=82176,format=20
 [HOST] [IPU1-0]     58.164765 s:  VPE: Loading Down-scaling Co-effs
 [HOST] [IPU1-0]     58.164978 s:  VPE: Co-effs Loading ... DONE !!!
 [HOST] [IPU1-0]     58.165222 s:  VPE: Create Done !!!
 [HOST] [IPU1-0]     58.165649 s:  DISPLAY: Create in progress !!!
 [HOST] [IPU1-0]     58.165954 s:    wwlog: repliEnalbe is false before set!!!!!
 [HOST] [IPU1-0]     58.166046 s: wwlog: repliEnalbe set true
 [HOST] [IPU1-0]     58.166107 s: wwlog: display get flag= 82176,format=20
 [HOST] [IPU1-0]     58.166168 s: wwlog: display will create in SYSTEM_DF_RGB24_888!!!!!
 [HOST] [IPU1-0]     58.166320 s: hal/src/vpshal_dssDispcVid.c @ Line 1023:
 [HOST] [IPU1-0]     58.166412 s: Invalid Data format
 [HOST] [IPU1-0]     58.166595 s: dispdrv/src/vpsdrv_displayCore.c @ Line 304:
 [HOST] [IPU1-0]     58.166687 s: Set DSS parameter failed
 [HOST] [IPU1-0]     58.166748 s:  Assertion @ Line: 474 in displayLink_drv.c: status==SYSTEM_LINK_STATUS_SOK : failed !!!

But when i use capture->vpe->sgxFmcpy(A15)->display,display_link can run normal in SYSTEM_DF_BGRA16_4444 .

I want to know why dispaly_link cant be creanted in SYSTEM_DF_RGB24_888,or how to make display_link run in SYSTEM_DF_RGB24_888 .