Preface:

Hass multimedia processing platform (MPP) is divided into: a video input (VI), a video processing (VPSS), a video encoder (VENC), a video decoder (VDEC), video output (VO), Video Detection Analysis (VDA), the audio input (AI), an audio output (AO), the audio encoder (AENC), an audio decoder (ADEC), area management (the rEGION) modules. presented here video input module (VI). VI and is closely related to AD, AD output mode must correspond to the Hass VI, AD to correct the output transmitted to the Hisi device, it is necessary to understand the characteristics of the ADC own use. Further VI operation flow can be divided into:

0. Get the default parameters
1. Analyzing the number of ADC chip
2. Get the current that has been inserted through the camera resolution information IOC_VDEC_GET_INPUT_VIDEO_FMT
3. Calculate the buffer pool size
4. Initialize System mpp
5. Start ADC equipment
6. Start function VI
7. Set VI channel bonding relationship
8. Establish binding of VI and VPSS

Description:

Development board configuration:
   Hisi: Hi3521A
   the AD: NVP6134C a
   camera: 720P, 1080P
   show: HDMI bus, 1080P screen

(A) Basic features:

(1)NVP6134

Formats INPUT
   - 4CH Connections Video INPUT
       : CVBS / the COMET
       : Universal 1M, and 2M. 3 /. 4 / 5M the NRT
the Output Formats
       - BT.656 in the Output / BT.1120. 4: 2: 2 byte interleave the format with37.125 / 74.25 / 148.5 / 297MHz
       - support the Format Sync Separate BT.601 (the CLK / H, the SYNC-V / 8'bitDATA)
   support the Output Port Connections Video * 2, the Output Each Port Connections Video FormatSelectable

   a maximum input 6134NVP chip support 4 data point, two 8-bit output port can be selected individually controlled, it may be blended as a 16-bit port.

(2) Hisi VI

Hi3521A BT.1120 chip has two interfaces, each interface followed BT.1120 VI corresponding to two devices, i.e., a first port corresponding to the VI Dev0 BT.1120 and the Dev1, the second port corresponding to the Dev2 BT.1120 and VI Dev3.4 a 1/2/4 VI D1,960H devices support multi mode input (BT.656 protocol), and 2-way multi mode 720P. 4 device supports 720P / 1080P HD input 1 (BT.1120 Protocol) In this case, the same interface BT1120 another Dev unavailable, i.e. DEV0, DEV1 can only available; DEV2, DEV3 can only use a .

I used here is the BT.656 mode, that is, four dev can be used alone, can support 1/2/4 D1,960H composite input mode (BT.656 protocol), and 2-way 720P composite mode.

(B) adaptive input

Adapted input is actually connected to input channels and the actual resolution of the camera camera to apply memory pool, and so on to set the input mode.
To implement the adaptive input IOC_VDEC_GET_INPUT_VIDEO_FMT can acquire a video input resolution, the number of input information like camera head.
The actual mechanism operating member is:

typedef struct _nvp6134_input_videofmt
{
    unsigned int inputvideofmt[16];
    unsigned int getvideofmt[16];
    unsigned int geteqstage[16];
    unsigned int getacpdata[16][8];
}nvp6134_input_videofmt;

Query the camera into large ones and resolution can be achieved:

int Check_NVP6134_VideoInputFMT(void)
{
    int fd = -1;
    int i = 0;
    int l_s32Ret = 0;
    nvp6134_input_videofmt stInputFMT;

    bzero(&stInputFMT,sizeof(nvp6134_input_videofmt));

    fd = open(NVP6134_FILE, O_RDWR);
    if (fd < 0)
    {
        printf("[%s:%d] open nvp6134 (%s) fail\n", __func__, __LINE__, NVP6134_FILE);
        return -1;
    }

    l_s32Ret = ioctl(fd, IOC_VDEC_GET_INPUT_VIDEO_FMT, &stInputFMT);
    if(l_s32Ret < 0)
    {
        printf("[%s,%d][l_s32Ret:%d]\n",__FILE__,__LINE__,l_s32Ret);
    }

    close(fd);


    for(i=0;i<16;i++)
    {
        printf("i=%d videofmt     =0x%x \n",i,stInputFMT.getvideofmt[i]);
        printf("i=%d inputvideofmt=0x%x \n\n",i,stInputFMT.inputvideofmt[i]);
    }

    return 0;
}

Getvideofmt resolution correspondence relationship may view the function of driving NVP6134

unsigned char nvp6134_vfmt_convert(unsigned char vdsts, unsigned char g_ck_fmt)
/*nvp6134b视频模式值转换*/
unsigned char nvp6134_vfmt_convert(unsigned char vdsts, unsigned char g_ck_fmt)
{
    unsigned int ret;
    switch(vdsts)
    {
        case 0x00:  ret = 0x01;    break;  //cvbs ntsc
        case 0x10:  ret = 0x02; break;    //cvbs pal
        case 0x20:    ret = 0x04; break;    //720p ntsc
         case 0x21:  ret = 0x08; break;    //720p pal
        case 0x22:  ret = 0x51; break;    //720P@RT ntsc
        case 0x23:  ret = 0x52; break;    //720P@RT pal
        case 0x30:  ret = 0x40;    break;    //1080p ntsc
        case 0x31:    ret = 0x80;    break;    //1080p pal
        ....
        case 0x01:
        case 0x02:
            if((g_ck_fmt>>4) == 0x02)    ret = 0x91;    //AHD @ 3M RT-30P
            else                         ret = 0x92;    //AHD @ 3M RT-25P
        break;    
        default:
        case 0xFF:    ret = 0x00;    break;    //not detects
    }
    return ret;
}

Perform functions such as to give the above:

/hi3520/app # ./nvp_6134_input_fmt_check 
    i=0 videofmt     =0x0 
    i=0 inputvideofmt=0x0 

    i=1 videofmt     =0x0 
    i=1 inputvideofmt=0x0 

    i=2 videofmt     =0x0 
    i=2 inputvideofmt=0x0 

    i=3 videofmt     =0x12 
    i=3 inputvideofmt=0x0
    ....

Can know the fourth inputs of a camera is the 720P. Then go to follow a path 720P camera input to initialize the MPP Hisi

(C) Basic operation flow

0. Get the default parameters

This is not necessary, except as a default parameter when the camera is not detected.

1. Analyzing the number of ADC chip

NVP6134 only support a maximum four input camera data, but can support HI3521A input camera 16, can be used simultaneously as the chips still have a plurality of ADC data input. Hass equipment for maximum support should be able to enter the four NVP6134.

2. Get input and camera resolution

Get current has been inserted through IOC_VDEC_GET_INPUT_VIDEO_FMT camera resolution information, that is, the content (B) described above adapted input

3. Calculate the buffer pool size

It can be used directly to calculate the official Interface SAMPLE_COMM_SYS_CalcPicVbBlkSize

4. Initialize System mpp

You can directly call SAMPLE_COMM_SYS_Init interface initialization.

5. Start ADC equipment

It should be noted: ADC must be provided here correspond Hisi VI below set, otherwise the data can not be normally transmitted.
I am here is to provide two-way output port 2 NVP6134 multiplexing, each corresponding to two channels of data output port, a total of four data, set as follows:

        case SAMPLE_VI_MODE_6134_960H_720P_2MUX:
        {
            SAMPLE_PRT("SAMPLE_VI_MODE_6134_960H_720P_2MUX!!!\n");
            for(i=0;i<chip_cnt*4;i++)
            {
                schnmode.ch = i;
                schnmode.vformat = video_mode;
                schnmode.chmode = NVP6134_VI_720P_2530;
                ioctl(fd, IOC_VDEC_SET_CHNMODE, &schnmode);
            }
            for(i=0;i<chip_cnt;i++)
            {
                optmode.chipsel = i;
                optmode.portsel = 2;
                optmode.portmode = NVP6134_OUTMODE_2MUX_HD;
                optmode.chid = 0;
                ioctl(fd, IOC_VDEC_SET_OUTPORTMODE, &optmode);
                optmode.portsel = 1;
                optmode.portmode = NVP6134_OUTMODE_2MUX_HD;
                optmode.chid = 1;
                ioctl(fd, IOC_VDEC_SET_OUTPORTMODE, &optmode);
            }
            SAMPLE_PRT("[%s:%d] SET OK!!!\n", __func__, __LINE__);
            break;
        }

Structure analysis:

/**
*    Argurments        : 
*                      portsel(port select->6134b[1,2],6134[0,1,2,3],6134C[1,2];)
*                      portmode(port mode select[1mux,2mux,4mux]),
*                      chid(channel id, 1mux[0,1,2,3], 2mux[0,1], 4mux[0])
**/
typedef struct _nvp6134_opt_mode
{
    unsigned char chipsel; 
    unsigned char portsel;
    unsigned char portmode;
    unsigned char chid;
}nvp6134_opt_mode;

6. Start function VI

Here is the design and use dev0 dev1, two multiplexed mode

        case SAMPLE_VI_MODE_8_720P:
        case SAMPLE_VI_MODE_16_720P:
        case SAMPLE_VI_MODE_8_1080P:
        case SAMPLE_VI_MODE_4_1080P: 
        case SAMPLE_VI_MODE_2_720P:    
            memcpy(&stViDevAttr,&DEV_ATTR_6114_720P_2MUX_BASE,sizeof(stViDevAttr));
            SAMPLE_COMM_VI_SetMask(ViDev,&stViDevAttr);
            break;
        default:
            SAMPLE_PRT("vi input type[%d] is invalid!\n", enViMode);
            return HI_FAILURE;

Device attributes are as follows:

VI_DEV_ATTR_S DEV_ATTR_6114_720P_2MUX_BASE =
{
    /*接口模式*/
    VI_MODE_BT656,
    /*1、2、4路工作模式*/
    VI_WORK_MODE_2Multiplex,
    /* r_mask    g_mask    b_mask*/
    {0xFF000000,    0x0},

    /* 双沿输入时必须设置 */
    VI_CLK_EDGE_SINGLE_UP,
    
    /*AdChnId*/
    {-1, -1, -1, -1},
    /*enDataSeq, 仅支持YUV格式*/
    VI_INPUT_DATA_YVYU,
    /*同步信息，对应reg手册的如下配置, --bt1120时序无效*/
    {
    /*port_vsync   port_vsync_neg     port_hsync        port_hsync_neg        */
    VI_VSYNC_FIELD, VI_VSYNC_NEG_HIGH, VI_HSYNC_VALID_SINGNAL,VI_HSYNC_NEG_HIGH,VI_VSYNC_VALID_SINGAL,VI_VSYNC_VALID_NEG_HIGH,

    /*timing信息，对应reg手册的如下配置*/
    /*hsync_hfb    hsync_act    hsync_hhb*/
    {0,            0,        0,
    /*vsync0_vhb vsync0_act vsync0_hhb*/
     0,            0,        0,
    /*vsync1_vhb vsync1_act vsync1_hhb*/
     0,            0,            0}
    },
    /*使用内部ISP*/
    VI_PATH_BYPASS,
    /*输入数据类型*/
    VI_DATA_TYPE_YUV
};

7. Set VI channel bonding relationship

Design is:

The channels 0, respectively, bound to the WAY0 dev0, and Way1,
The channels 2, 3, respectively, bound to the WAY0 dev1, and Way1,

The code is implemented as:

    for(i=0,ViChn=0; i<stViParam.s32ViDevCnt; i++)
    {
        for(j=0;j<stViParam.s32ViChnCnt/2;j++,ViChn++)
        {
            s32Ret = HI_MPI_VI_GetChnBind(ViChn, &stChnBindAttr);
            stChnBindAttr.ViDev=i;
            stChnBindAttr.ViWay = ViChn%2;
            
            if (HI_ERR_VI_FAILED_NOTBIND == s32Ret)
            {
                s32Ret = HI_MPI_VI_BindChn(ViChn, &stChnBindAttr);
                if (HI_SUCCESS != s32Ret)
                {
                    SAMPLE_PRT("call HI_MPI_VI_BindChn failed with %#x\n", s32Ret);
                    return HI_FAILURE;
                } 
            } 

            s32Ret = SAMPLE_COMM_VI_StartChn(ViChn, &stCapRect, &stTargetSize, enViMode, VI_CHN_SET_NORMAL);
            if (HI_SUCCESS != s32Ret)
            {
                SAMPLE_PRT("call SAMPLE_COMM_VI_StarChn failed with %#x\n", s32Ret);
                return HI_FAILURE;
            } 
        }
    }

8. Turn VPSS and VI are bound to VPSS

    /******************************************
     step 4: start vpss and vi bind vpss
    ******************************************/
    s32Ret = SAMPLE_COMM_SYS_GetPicSize(enNorm, PIC_HD720, &stSize);
    if (HI_SUCCESS != s32Ret)
    {
        SAMPLE_PRT("SAMPLE_COMM_SYS_GetPicSize failed!\n");
        goto END_4_720P_1;
    }

    memset(&stGrpAttr,0,sizeof(VPSS_GRP_ATTR_S));
    stGrpAttr.u32MaxW = stSize.u32Width;
    stGrpAttr.u32MaxH = stSize.u32Height;
    stGrpAttr.bNrEn = HI_TRUE;
    stGrpAttr.enDieMode = VPSS_DIE_MODE_NODIE;
    stGrpAttr.enPixFmt = SAMPLE_PIXEL_FORMAT;
    s32Ret = SAMPLE_COMM_VPSS_Start(s32VpssGrpCnt, &stSize, VPSS_MAX_CHN_NUM, &stGrpAttr);
    if (HI_SUCCESS != s32Ret)
    {
        SAMPLE_PRT("Start Vpss failed!\n");
        goto END_4_720P_1;
    }

    s32Ret = SAMPLE_COMM_VI_BindVpss(enViMode);
    if (HI_SUCCESS != s32Ret)
    {
        SAMPLE_PRT("Vi bind Vpss failed!\n");
        goto END_4_720P_2;
    }

Results of the:

After proper initialization and binding properties are as follows:

/hi3520/app # cat /proc/umap/vi 

[VIU] Version: [Hi3521A_MPP_V1.0.3.1 B010 Release], Build Time: [Apr 18 2016, 12:08:26]

-----MODULE PARAM--------------------------------------------------------------
detect_err_frame drop_err_frame stop_int_level  max_cas_gap
              10              0              0        28000

-----VI DEV ATTR---------------------------------------------------------------
 Dev   IntfM  WkM  ComMsk0  ComMsk1    CLKM AD0 AD1 AD2 AD3   Seq   DPath DType DRev
   0   BT656 2Mux       ff        0      UP  -1  -1  -1  -1  UYVY  ByPass   YUV    N
   1   BT656 2Mux     ff00        0      UP  -1  -1  -1  -1  UYVY  ByPass   YUV    N

-----VI HIGH DEV ATTR---------------------------------------------------------------
 Dev  InputM  WkM  ComMsk0  ComMsk1 AD0 AD1 AD2 AD3   Seq CombM CompM ClkM  Fix FldP   DPath DType DRev

-----VI PHYCHN ATTR------------------------------------------------------------
 PhyChn CapX CapY  CapW  CapH  DstW  DstH CapSel ScanM   SkipM Mirror Flip IntEn PixFom SrcRat DstRat
      0    0    0  1280   720  1280   720   both     P SKIPNON      N    N    Y   sp420     -1     -1
      1    0    0  1280   720  1280   720   both     P SKIPNON      N    N    Y   sp420     -1     -1
      2    0    0  1280   720  1280   720   both     P SKIPNON      N    N    Y   sp420     -1     -1
      3    0    0  1280   720  1280   720   both     P SKIPNON      N    N    Y   sp420     -1     -1

-----VI PHYCHN MINOR ATTR------------------------------------------------------------
 PhyChn CapX CapY  CapW  CapH  DstW  DstH CapSel ScanM Mirror   Flip  PixFom  MixCap DwScal SrcRat DstRat

-----VI PHYCHN STATUS 1----------------------------------------------------------
 PhyChn BindDev  Way      IntCnt  VbFail  LosInt  TopLos  BotLos BufCnt  IntT  SendT  Field  Stride
      0     0     0         353       0       3       0       2      2    58     24    frm    1280
      1     0     1         352       0       3       0       2      2    27     11    frm    1280
      2     1     0         352       0       3       0       2      2    34     13    frm    1280
      3     1     1         352       0       3       0       2      2    26     11    frm    1280

-----VI PHYCHN STATUS 2---------------------------------------------------------
 PhyChn MaxIntT IntGapT MaxGapT OverCnt LIntCnt  ThrCnt AutoDis CasAutD  TmgErr      ccErrN    IntRat
      0      58   40009   40021       0       0       1       0       0       0           3        24
      1      47   40001   40010       0       0       1       0       0       0           3        25
      2      52   40026   40026       0       0       1       0       0       0           3        24
      3      55   40004   40086       0       0       1       0       0       0           3        24

-----VI CHN STATUS-------------------------------------------------------------
 ViChn   bEnUsrP   FrmTime   FrmRate     SendCnt      SwLost     Depth
     0         N     40010        25         350           0         0
     1         N     40000        25         349           0         0
     2         N     40025        25         349           0         0
     3         N     40004        25         349           0         0

-----VI CHN CALL VGS STATUS 1-------------------------------------------------
 ViChn   UsrBgnNOk   UsrCancel    UsrEndOk     UsrCbOk     CvrBgnNOk   CvrCancel    CvrEndOk     CvrCbOk

-----VI CHN CALL VGS STATUS 2-------------------------------------------------
 ViChn   OsdBgnNOk   OsdCancel    OsdEndOk     OsdCbOk      ScaleNOk   SclCancel    SclEndOk     SclCbOk
/hi3520/app #