TI中文支持网Part Number:DS90UB940-Q1
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目前我们正在用DS90UB941+DS90UB940做DSI转CSI的转换，但我们目前遇到一个问题是测量DS90UB940的CSI输出端没有信号输出，但是FPD-LINK III上是有信号传输的，同时，940上的PASS引脚电平为低，LOCK引脚电平为高，按照940的spec说明，出现PASS引脚为低表示输入的display timing出现问题，我们dump出两边的寄存器来对照spec，只能看出DES确实报错了，但是无法再进一步确认问题具体出在哪里了，麻烦帮忙确认一下原因。
我们使用的分辨率是480*854@60Hz，具体的时序参数如下：
h_active：480
hfp：20
hbp：20
hsync：10
htotal 530
v_active：854
vfp：40
vbp：40
vsync：10
vtotal 944
在硬件连接上，DS90UB941的DSI输入端为2lane，输出端使用单lane FPD-LINK III连接到DS90UB940，再从DS90UB940的CSI端使用2lane输出，大致示意图如下：
最后附上我们dump的寄存器值，包含了940的通用寄存器和DSI间接寄存器，以及941的通用寄存器和CSI间接寄存器，详见ds90ub941/ds90ub940_reg_configuration.txt两个文件
ds90ub940_reg_configuration.txt
##ds90ub940寄存器dump ds90ub941_partner_des_reg_dump_store:00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ds90ub941_partner_des_reg_dump_store: 00 58 04 00 e0 fe 1e 00 18 00 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: 10 00 00 00 00 00 00 00 00 00 01 00 00 23 40 00 00 ds90ub941_partner_des_reg_dump_store: 20 00 00 40 20 08 00 83 84 01 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: 30 00 00 90 25 01 00 00 8a 00 00 00 00 20 e0 23 00 ds90ub941_partner_des_reg_dump_store: 40 43 03 03 00 60 88 00 00 0f 00 00 08 00 00 63 00 ds90ub941_partner_des_reg_dump_store: 50 03 10 00 01 80 00 00 00 00 7f 20 20 00 00 00 00 ds90ub941_partner_des_reg_dump_store: 60 00 00 00 00 10 00 00 00 00 00 22 50 00 01 00 00 ds90ub941_partner_des_reg_dump_store: 70 00 00 00 07 07 08 00 00 00 00 00 00 02 00 00 00 ds90ub941_partner_des_reg_dump_store: 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: a0 00 00 7d 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: c0 00 00 00 00 00 00 00 00 c0 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_partner_des_reg_dump_store: f0 5f 55 42 39 34 30 00 00 00 00 00 00 00 00 00 00 ##ds90ub940的CSI相关间接寄存器dump ds90ub941_partner_des_csi_reg_dump_store:00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ds90ub941_partner_des_csi_reg_dump_store: 00 01 08 0b 0a 02 04 04 04 02 00 00 00 00 00 e0 81 ds90ub941_partner_des_csi_reg_dump_store: 10 00 00 00 3f 00 48 02 00 00 00 00 00 00 00 00 00 ds90ub941_partner_des_csi_reg_dump_store: 20 00 00 14 14 14 14 18 00 01 00 00 00 00 00 00 00
ds90ub941_reg_configuration.txt
##ds90ub941寄存器dump ds90ub941_reg_dump_store:00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ds90ub941_reg_dump_store: 00 18 00 00 9a 00 00 58 00 00 01 17 00 47 30 00 00 ds90ub941_reg_dump_store: 10 00 00 00 89 00 00 fe 1e 7f 7f 01 00 00 00 01 00 ds90ub941_reg_dump_store: 20 0b 00 25 00 00 00 00 00 01 20 20 a0 00 00 a5 5a ds90ub941_reg_dump_store: 30 00 09 00 05 0c 00 00 00 00 00 00 00 00 00 81 02 ds90ub941_reg_dump_store: 40 10 94 00 00 00 00 00 00 00 00 00 00 00 00 00 84 ds90ub941_reg_dump_store: 50 16 00 00 00 02 00 00 02 00 00 d9 00 07 06 44 1e ds90ub941_reg_dump_store: 60 22 02 00 00 10 00 00 00 00 00 00 00 00 00 20 00 ds90ub941_reg_dump_store: 70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 7f 00 ds90ub941_reg_dump_store: 80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_reg_dump_store: 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_reg_dump_store: a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_reg_dump_store: b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_reg_dump_store: c0 00 00 82 00 28 08 00 40 40 00 00 00 00 02 ff 00 ds90ub941_reg_dump_store: d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_reg_dump_store: e0 00 00 82 00 28 08 00 00 00 00 00 00 00 02 00 00 ds90ub941_reg_dump_store: f0 5f 55 42 39 34 31 00 00 00 00 00 00 00 00 00 00 ##ds90ub941的DSI 0间接寄存器dump ds90ub941_dsi_reg_dump_store:00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ds90ub941_dsi_reg_dump_store: 00 00 00 00 1d 14 12 00 00 00 00 00 00 00 00 00 13 ds90ub941_dsi_reg_dump_store: 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ds90ub941_dsi_reg_dump_store: 20 7f 00 ff 7f 00 00 00 00 00 00 3e 00 00 00 00 00 ds90ub941_dsi_reg_dump_store: 30 00 20 00 04 00 20 00 00 00 00 01 03 00 00 00 00
Kailyn Chen：
您好，Pass引脚的高电平只有在做BIST自检（BISTEN使能）的时候，BIST自检成功，Pass为高。
BISTEN不使能的话， PASS是一直为low的。正常工作条件下，PASS引脚通常是不使用的，只需要通过LOCK引脚来判断是否有error。
