DS90UB941AS-Q1: 941 948 pg都有显示，现在关掉pg，直接使用外部dsi clk data，无显示

941 948 pg都有显示，现在关掉pg，直接使用外部dsi clk data，无显示，

发现941没有检测到dsi clk和pclk，使用外部dsi，941有什么特地的配置吗？

下面是941 948 reg dump：

34 00 00 9a 00 00 58 00 00 01 9d 04 03 30 00 00 
00 00 00 8f 00 00 fe 9e 7f 7f 01 00 00 00 01 00 
03 00 25 00 00 00 00 00 01 20 20 a0 00 00 a5 5a 
00 09 00 05 0c 00 00 00 00 00 00 00 00 00 81 02 
10 90 00 00 00 00 00 00 00 00 00 00 00 00 00 8c 
16 00 00 00 02 10 00 02 00 00 92 01 07 06 44 00 
22 02 00 00 10 00 00 00 00 00 00 00 00 00 20 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 82 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 82 00 78 00 00 44 40 00 00 00 00 02 ff 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 82 00 68 08 00 00 00 00 00 00 00 02 00 00 
5f 55 42 39 34 31 00 00 00 00 00 00 00 00 00 00 
//948
58 04 00 f0 fe 9e 00 34 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 01 00 00 22 13 53 09 
05 00 40 30 00 00 83 84 21 00 00 00 00 00 00 00 
00 00 90 25 11 00 00 ac 00 00 00 2f 20 e0 23 00 
43 03 03 00 60 88 00 00 0f 80 00 08 00 00 63 00 
03 10 00 01 80 00 00 00 00 7f 20 20 00 00 00 00 
00 00 00 00 10 00 00 00 00 00 00 00 00 00 01 00 
00 00 00 07 07 08 00 00 00 00 00 00 02 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 8c 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 c0 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
5f 55 42 39 34 38 00 00 00 00 00 00 00 00 00 00 

Kailyn Chen：

您好，关掉PG。使用外部DSI data，不显示，那么是否用示波器测量下948的输出是否有波形？

或者948输入是否有波形？

,

jianlin fu：

现在关掉pg，直接用外部dsi clk 和video，目前941也都检测dsi信号正常，pclk也有，948也lock，但是没有显示，实际测试dsi video也是有的，这块还要排查哪些？目前验证最简硬件配置：dsi-941-948-1920*720panel，single link模式，目前dsi ia reg都是用默认值，有没有这种配置下的r参考eg setting？谢谢。

,

Kailyn Chen：

您读取下状态寄存器0x1C的值看看是多少？如果0x1C的值都正常，那应该不是941或948的问题。

,

jianlin fu：

948 0x1c 值为0x23,全部941 、948 reg dump如下

7838.dsi.txt

34 00 00 9a 00 00 58 00 00 01 0a 00 67 30 00 0000 00 00 8f 00 00 fe 9e 7f 7f 01 00 00 00 01 0003 00 25 00 00 00 00 00 01 20 20 a0 00 00 a5 5a00 09 00 05 0c 00 00 00 00 00 00 00 00 00 81 0210 90 00 00 00 00 00 00 00 00 00 00 00 00 00 8c16 00 00 00 02 10 00 02 00 00 d9 01 07 06 44 7122 02 00 00 10 00 00 00 00 00 00 00 00 00 20 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 82 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 82 00 78 00 00 44 40 00 00 00 00 02 ff 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 82 00 68 08 00 00 00 00 00 00 00 02 00 005f 55 42 39 34 31 00 00 00 00 00 00 00 00 00 00//948
58 04 00 f0 fe 9e 00 34 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 01 00 00 23 13 53 0905 00 40 30 00 00 83 84 01 00 00 00 00 00 00 0000 00 90 25 11 00 00 ac 00 00 00 04 20 e0 23 0043 03 03 00 60 88 00 00 0f 80 00 08 00 00 63 0003 10 00 01 80 00 00 00 00 7f 20 20 00 00 00 0000 00 00 00 10 00 00 00 00 00 00 00 00 00 01 0000 00 00 07 07 08 00 00 00 00 00 00 02 00 00 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 8c 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 c0 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 005f 55 42 39 34 38 00 00 00 00 00 00 00 00 00 00 

,

jianlin fu：

你好，上面寄存有问题吗？现在只是背光亮了，dsi发的test bar没有显示

,

Kailyn Chen：

0x1C 的值是0x23，可以bit5=1 读取的是dual link  mode，而bit4是0， 又为single link mode，这里矛盾了。 硬件您是怎么接的？

另外就是bit3=0，: I2S PLL controller not locked。

,

jianlin fu：

941 dout0 -> 948 D0-D7 -> panel,所以对于948 receiver 是single link mode,transmitter 是duallink OpenLDI,

我这样理解对吗? 这个寄存器941 内部pg正常显示也是0x23.

I2S因为我们没有用到音频,这个有关系吗?请帮忙再检查下941 948 dump寄存器,谢谢