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SN65DSI86: DSI86 Error was reported by the registers, and TX automatic disabled, cause dark screen on Notebook applications

Part Number: SN65DSI86

Hi Team,

 

One of our customers is using DSI86 on a notebook project, they had some project successful in the past, but they are working on new projects now.

 

They is reporting some failures, as the DSI86 output gone, and the screen goes to dark. They did the experiments by playing the windows pattern test program, some units has the issue in 1~2 days, some units went out in 1week.  They summery the error reported by our registers as below:

 

sn65dsi86 registers

Sample Unit

0xf0

0xf1

0xf2

0xf3

0xf4

0xf5

0xf6

0xf7

0xf8

1

0x00

0x20

0x00

0x00

0x01

0x00

0x41

0x00

0x01

2

0x00

0x03

0x00

0x00

0x01

0x00

0x02

0x00

0x01

3

0x00

0x00

0x00

0x00

0x01

0x00

0x40

0x00

0x01

4

0x00

0x24

0x00

0x00

0x41

0x00

0x41

0x01

0x01

 

And their questions are:

  1. If any errors was detected, will DSI86 disable its transmit? If so, could we disable this function?

  2. They pulled out the initialization registers as below, could we double check if anything is wrong. These register was used in other projects, but the issues only seen on this project.

Register

Value

0x0A

0x08

0x5C

bit0置1

0x64

0x01

0x74

0x00

0x75

0x01

0x76

0x0A

0x77

0x01

0x78

0x81

0x10

0x26

0x93

0x34

0x94

0x20

0x12

0x7c

0x0D

0x01

0x95

0x00

0x5A

0x05

0x96

0x02

0x93

0x34

0x96

0x0A

0x96

0x0A

0x20

0x70

0x21

0x08

0x22

0x00

0x23

0x00

0x24

0xA0

0x25

0x05

0x2C

0x20

0x2D

0x00

0x30

0x0A

0x31

0x00

0x34

0x50

0x36

0x1B

0x38

0x30

0x3A

0x03

0x5B

0x00

0x3C

0x00

0x5A

0x0D

  1. They tested the eye diagram, very close to our device, eye is opened, but they found DATA0 Lane of the MIPI side is 30mV lower than the other lanes. Remove our devices, and directly connect to a panel, the height of all the lanes are same. And for the projects does not have this issues are same. So they like to know why our device has this behavior? Will this cause some error.