Capture 16bits stream in Gate mode.

[lwx]

Hi all,
I have trouble in capture data from FPGA.

My platform: IMX6Q  Linux3.0.35
FPGA: YUV422(UYUV) 720P@60fps
IMX6Q: connected with DATA[4]_DATA[19] HS VS PIXCLK VIDEO_EN and use IPU2 CSI1

PIN IOMUX setting :

    /* ipu2 csi1 */
    MX6Q_PAD_EIM_A16__IPU2_CSI1_PIXCLK,
    MX6Q_PAD_EIM_DA11__IPU2_CSI1_HSYNC,
    MX6Q_PAD_EIM_DA12__IPU2_CSI1_VSYNC,
    MX6Q_PAD_EIM_DA10__IPU2_CSI1_DATA_EN, 
    MX6Q_PAD_EIM_DA5__IPU2_CSI1_D_4,
    MX6Q_PAD_EIM_DA4__IPU2_CSI1_D_5,
    MX6Q_PAD_EIM_DA3__IPU2_CSI1_D_6,
    MX6Q_PAD_EIM_DA2__IPU2_CSI1_D_7,
    MX6Q_PAD_EIM_DA1__IPU2_CSI1_D_8,
    MX6Q_PAD_EIM_DA0__IPU2_CSI1_D_9,
    MX6Q_PAD_EIM_EB1__IPU2_CSI1_D_10,
    MX6Q_PAD_EIM_EB0__IPU2_CSI1_D_11,
    MX6Q_PAD_EIM_A17__IPU2_CSI1_D_12,
    MX6Q_PAD_EIM_A18__IPU2_CSI1_D_13,
    MX6Q_PAD_EIM_A19__IPU2_CSI1_D_14,
    MX6Q_PAD_EIM_A20__IPU2_CSI1_D_15,
    MX6Q_PAD_EIM_A21__IPU2_CSI1_D_16,
    MX6Q_PAD_EIM_A22__IPU2_CSI1_D_17,
    MX6Q_PAD_EIM_A23__IPU2_CSI1_D_18,
    MX6Q_PAD_EIM_A24__IPU2_CSI1_D_19,

I use GATE Mode to capture stream, and it works. but the data I got was wrong.

The data in red box should be DC,  and it always in same wrong in same place.

The FPGA wave is like this:

Here is the reigster that I dumped.    
imx-ipuv3 imx-ipuv3.1: csi=1, CSI_SENS_CONF = 0x0000CA00
imx-ipuv3 imx-ipuv3.1: csi=1, CSI_ACT_FRM_SIZE=0X02CF04FF

The CPMEM is:
imx-ipuv3 imx-ipuv3.1: ch 1 word 0 - 00000000 00000000 00000000 E0001800 000B3C9F
imx-ipuv3 imx-ipuv3.1: ch 1 word 1 - 03200000 00640000 2147C000 00027FC0 00000000
imx-ipuv3 imx-ipuv3.1: PFS 0xa,
imx-ipuv3 imx-ipuv3.1: BPP 0x3,
imx-ipuv3 imx-ipuv3.1: NPB 0x1f
imx-ipuv3 imx-ipuv3.1: FW 1279,
imx-ipuv3 imx-ipuv3.1: FH 719,
imx-ipuv3 imx-ipuv3.1: EBA0 0x19000000
imx-ipuv3 imx-ipuv3.1: EBA1 0x19000000
imx-ipuv3 imx-ipuv3.1: Stride 2559
imx-ipuv3 imx-ipuv3.1: scan_order 0
imx-ipuv3 imx-ipuv3.1: uv_stride 0
imx-ipuv3 imx-ipuv3.1: u_offset 0x0
imx-ipuv3 imx-ipuv3.1: v_offset 0x0
imx-ipuv3 imx-ipuv3.1: Width0 0+1,
imx-ipuv3 imx-ipuv3.1: Width1 0+1,
imx-ipuv3 imx-ipuv3.1: Width2 0+1,
imx-ipuv3 imx-ipuv3.1: Width3 0+1,
imx-ipuv3 imx-ipuv3.1: Offset0 0,
imx-ipuv3 imx-ipuv3.1: Offset1 0,
imx-ipuv3 imx-ipuv3.1: Offset2 0,
imx-ipuv3 imx-ipuv3.1: Offset3 0

dump ipu after enable csi:

imx-ipuv3 imx-ipuv3.1: IPU_CONF =       0x00000102
imx-ipuv3 imx-ipuv3.1: IDMAC_CONF =     0x0000002F
imx-ipuv3 imx-ipuv3.1: IDMAC_CHA_EN1 =  0x00000002
imx-ipuv3 imx-ipuv3.1: IDMAC_CHA_EN2 =  0x00000000
imx-ipuv3 imx-ipuv3.1: IDMAC_CHA_PRI1 =         0x18800001
imx-ipuv3 imx-ipuv3.1: IDMAC_CHA_PRI2 =         0x00000000
imx-ipuv3 imx-ipuv3.1: IDMAC_BAND_EN1 =         0x00000000
imx-ipuv3 imx-ipuv3.1: IDMAC_BAND_EN2 =         0x00000000
imx-ipuv3 imx-ipuv3.1: IPU_CHA_DB_MODE_SEL0 =   0x00000002
imx-ipuv3 imx-ipuv3.1: IPU_CHA_DB_MODE_SEL1 =   0x00000000
imx-ipuv3 imx-ipuv3.1: IPU_CHA_TRB_MODE_SEL0 =  0x00000000
imx-ipuv3 imx-ipuv3.1: IPU_CHA_TRB_MODE_SEL1 =  0x00000000
imx-ipuv3 imx-ipuv3.1: DMFC_WR_CHAN =   0x00000090
imx-ipuv3 imx-ipuv3.1: DMFC_WR_CHAN_DEF =       0x202020F6
imx-ipuv3 imx-ipuv3.1: DMFC_DP_CHAN =   0x00009694
imx-ipuv3 imx-ipuv3.1: DMFC_DP_CHAN_DEF =       0x2020F6F6
imx-ipuv3 imx-ipuv3.1: DMFC_IC_CTRL =   0x00000002
imx-ipuv3 imx-ipuv3.1: IPU_FS_PROC_FLOW1 =      0x00000000
imx-ipuv3 imx-ipuv3.1: IPU_FS_PROC_FLOW2 =      0x00000000
imx-ipuv3 imx-ipuv3.1: IPU Warning - IPU_INT_STAT_5 = 0x00000002
imx-ipuv3 imx-ipuv3.1: IPU_FS_PROC_FLOW3 =      0x00000000
imx-ipuv3 imx-ipuv3.1: IPU_FS_DISP_FLOW1 =      0x00000000
imx-ipuv3 imx-ipuv3.1: IPU_VDIC_VDI_FSIZE =     0x00000000
imx-ipuv3 imx-ipuv3.1: IPU_VDIC_VDI_C =         0x00000000
imx-ipuv3 imx-ipuv3.1: IPU_IC_CONF =    0x00000000

Any ideas?

[igorpadykov]

Hi li

IPU_INT_STAT_5 = 0x00000002 may mean new frame starts before the previous
end-of-frame event as result of data rate problems. Such problems may be a
result of the IPU running in slower clock then required by the use case.

Best regards
igor
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[lwx]

Thks igor,

Could you pls tell me how to modify IPU clock? I cann't find where!

[igorpadykov · Accepted solution]

clock can be adjusted in ../mach-mx6/clock.c for gated mode

may be useful

https://community.nxp.com/docs/DOC-97981 

~igor