我用的是OV8810芯片，输出格式为raw 8bit bggr, 我的数据流向是CSI2A->IPIPEIF->ISIF->SDRAM,通过SDRAM得到的数据全为0，但是通过CSI2A->SDRAM取出来的数据是对的，现在不知道怎么来排查这个问题，下面是我的寄存器输出：
[ 96.365966] : -------------IPIPEIF Register dump-------------
[ 96.366027] : ###IPIPEIF CFG1=0x00000000
[ 96.366027] : ###IPIPEIF CFG2=0x00000000
[ 96.366027] : ###ISIF SYNCEN=0x00000001
[ 96.366058] : ###ISIF CADU=0x00000000
[ 96.366058] : ###ISIF CADL=0x00000000
[ 96.366058] : ###ISIF MODESET=0x00002000
[ 96.366088] : ###ISIF CCOLP=0x00000000
[ 96.366088] : ###ISIF SPH=0x00000000
[ 96.366088] : ###ISIF LNH=0x0000077f
[ 96.366119] : ###ISIF LNV=0x00000437
[ 96.366119] : ###ISIF VDINT0=0x00000437
[ 96.366119] : ###ISIF HSIZE=0x0000003c
[ 96.366149] : ###ISP5 SYSCONFIG=0x00000021
[ 96.366149] : ###ISP5 CTRL=0x0190c7f8
[ 96.366149] : ###ISP5 IRQSTATUS(0)=0x00000000
[ 96.366180] : ###ISP5 IRQENABLE_SET(0)=0x800c8001
[ 96.366180] : ###ISP5 IRQENABLE_CLR(0)=0x800c8001
[ 96.366180] : -----------------------------------------------
[ 96.366943] : -------------CSI2 Register dump-------------
[ 96.366943] : ###CSI2 SYSCONFIG=0x00001000
[ 96.366943] : ###CSI2 SYSSTATUS=0x00000001
[ 96.366973] : ###CSI2 IRQENABLE=0x00007b01
[ 96.366973] : ###CSI2 IRQSTATUS=0x00000000
[ 96.366973] : ###CSI2 CTRL=0x0029a811
[ 96.367004] : ###CSI2 DBG_H=0x00000000
[ 96.367004] : ###CSI2 COMPLEXIO_CFG=0x4a000321
[ 96.367004] : ###CSI2 COMPLEXIO_IRQSTATUS=0x00000000
[ 96.367034] : ###CSI2 SHORT_PACKET=0x00000000
[ 96.367034] : ###CSI2 COMPLEXIO_IRQENABLE=0x07ffffff
[ 96.367034] : ###CSI2 DBG_P=0x00000000
[ 96.367065] : ###CSI2 TIMING=0x7fffe1ff
[ 96.367065] : ###CSI2 CTX_CTRL1(0)=0x000100c9
[ 96.367065] : ###CSI2 CTX_CTRL2(0)=0x0000012a
[ 96.367095] : ###CSI2 CTX_DAT_OFST(0)=0x00000000
[ 96.367095] : ###CSI2 CTX_PING_ADDR(0)=0x00000000
[ 96.367095] : ###CSI2 CTX_PONG_ADDR(0)=0x00000000
[ 96.367126] : ###CSI2 CTX_IRQENABLE(0)=0x00000002
[ 96.367126] : ###CSI2 CTX_IRQSTATUS(0)=0x00000000
[ 96.367126] : ###CSI2 CTX_CTRL3(0)=0x00000000
[ 98.375671] : -------------ISS HL Register dump-------------
[ 98.383239] : ###ISS HL_REVISION=0x40000103
[ 98.389282] : ###ISS HL_SYSCONFIG=0x00000028
[ 98.395385] : ###ISS HL_IRQSTATUS_5=0x00000000
[ 98.401641] : ###ISS HL_IRQENABLE_5_SET=0x00000031
[ 98.431610] : ###ISS HL_IRQENABLE_5_CLR=0x00000031
[ 98.438262] : ###ISS CTRL=0x00000003
[ 98.453063] : ###ISS CLKCTRL=0xf0000006
[ 98.458709] : ###ISS CLKSTAT=0xf0000006
[ 98.464324] : -----------------------------------------------
