DS90UB941AS-Q1: dump DS90UB941的寄存器很慢

您好，

          我们使用ds90ub941来调一个1920×1080屏的时候， 遇到一个问题， 即如果屏是以又PORT连接的话， i2cdump ds90ub941寄存器的值就很慢，很卡， 如果将屏线拨去， 或者是使用单PORT连接的话， dump就不会卡。

如dump 941的情况如下：

i2cdump -y -f 0 0x0c 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 18 00 00 9a 00 00 59 34 36 01 0b 00 27 30 03 03 ?..?..Y46??.'0??
10: 00 00 00 8f 00 00 fe 9e 7f 7f 01 00 0f 00 07 00 …?..?????.?.?.
20: 0b 00 25 00 00 00 00 00 01 20 20 a0 00 00 a5 5a ?.%…..? ?..?Z
30: 01 09 80 07 0c 00 00 80 7f 07 00 00 cf 02 81 02 ?????..???..????
40: 04 05 18 00 00 00 00 00 00 00 00 00 00 00 00 8c ???…………?
50: 16 00 00 00 02 10 80 02 00 00 c9 03 07 06 44 5d ?…????..????D]
60: 22 02 00 00 10 00 00 00 00 00 00 00 00 00 20 00 "?..?……… .
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 7f 00 …………..?.
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
c0: 00 00 82 00 68 08 00 44 40 00 00 00 00 02 ff 00 ..?.h?.D@….??.
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
e0: 00 00 82 00 68 08 00 00 00 00 00 00 00 02 00 00 ..?.h?…….?..
f0: 5f 55 42 39 34 31 00 00 00 00 00 00 00 00 00 00 _UB941……….

dump 948的情况如下：

i2cdump -y -f 0 0x2c 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 58 04 00 f0 fe 1e 00 18 00 00 00 00 00 00 00 00 X?.???.?……..
10: 00 00 00 00 00 00 00 00 00 01 00 00 33 10 00 00 ………?..3?..
20: 00 00 40 20 08 00 83 84 11 00 00 00 00 00 00 00 ..@ ?.???…….
30: 00 00 90 25 01 00 00 8c 00 00 00 07 20 e0 23 00 ..?%?..?…? ?#.
40: 43 03 03 00 60 88 00 00 0f 80 00 08 00 00 63 00 C??.`?..??.?..c.
50: 03 10 00 01 80 00 00 00 00 7f 20 20 00 00 00 00 ??.??….? ….
60: 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 ….?………..
70: 00 00 00 07 07 08 00 00 00 00 00 00 02 00 00 00 …???……?…
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
a0: 00 00 8c 00 00 00 00 00 00 00 00 00 00 00 00 00 ..?………….
b0: 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 c0 00 00 00 00 00 00 00 ……..?…….
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 …………….
f0: 5f 55 42 39 34 38 00 00 00 00 00 00 00 00 00 00 _UB948……….

请问这个是941哪配置的问题？ 还是线路问题？

谢谢。

wangjiazhi wangjiazhi：

问题已解决。谢谢。

,

Kailyn Chen：

您好，感谢您的反馈，能分享下是怎么解决的吗？问题的原因出在哪里。

,

wangjiazhi wangjiazhi：

目前还没有定位， 只是使用了之前同事的代码和参数，这种现象就没有的。 问题也在定位中。 谢谢。