SN65DSI84: A small part color issue with using SN65DSI84

Hi Wenting,

Please share the panel datasheet as well as the settings in the DSI-Tuner (reference this FAQ: https://e2e.ti.com/support/interface/f/138/t/918890)

Regards,

I.K. 

5706.M215OG64-183-1901 带TP(CSOT).pdf

//=====================================================================
// Filename   : CSRold.txt
//
//   (C) Copyright 2013 by Texas Instruments Incorporated.
//   All rights reserved.
//
//=====================================================================
0x09              0x00
0x0A              0x05
0x0B              0x28
0x0D              0x00
0x10              0x26
0x11              0x00
0x12              0x59
0x13              0x00
0x18              0x6c
0x19              0x00
0x1A              0x03
0x1B              0x00
0x20              0x80
0x21              0x07
0x22              0x00
0x23              0x00
0x24              0x00
0x25              0x00
0x26              0x00
0x27              0x00
0x28              0x21
0x29              0x00
0x2A              0x00
0x2B              0x00
0x2C              0x2f
0x2D              0x00
0x2E              0x00
0x2F              0x00
0x30              0x0f
0x31              0x00
0x32              0x00
0x33              0x00
0x34              0x2f
0x35              0x00
0x36              0x00
0x37              0x00
0x38              0x00
0x39              0x00
0x3A              0x00
0x3B              0x00
0x3C              0x00
0x3D              0x00
0x3E              0x00


The PLL_EN bit and SOFT_RESET bit are not set as they need to be set per the recommended sequence defined in the datasheet

Hello I.K, 

Actually, the setting is checked by you related to the post https://e2e.ti.com/support/interface/f/138/t/900368. I've sent you a customer setting through email then. May I ask in this case, is ithe issue caused by customer platform setting not marching to DSI-TUNER setting? If so, which part is not marched to cause this kind of color issue, for example, any clock.?

Thanks for your advice.

Best regards,

wenting 

These settings look okay. Can you try enabling the test pattern to see if there's still a color issue? The test pattern can be enabled with the DSI-Tuner by checking the "Test Pattern" box and regenerating the settings. 

The test pattern should look like this:

Regards,

I.K.

It looks like there's some discoloring with the test pattern too. Can you try changing CHA and CHB to Format 1 with the test pattern and see if this changes the color (please include another picture)?

Regards,

I.K.

the  register  0x18  value   changed fram  0x6c  to 0x6f  ,but  the color  as well as old.

register  0x18  value   changed fram  0x6c  to 0x6f

the white color is  normal  changing CHA and CHB to Format 1 with the test pattern.

That is interesting. The test pattern looks correct after you changed it to Format 1. According to your panel datasheet though it should be Format 2 like you had originally. The information in the panel datasheet may be incorrect. 

Can you keep it in Format 1 (0x18 = 0x6F) and turn off the test pattern and go back to displaying video from your DSI source? Does the color still look incorrect?

Regards,

I.K. 

   the result  as this picture when keep it in Format 1 (0x18 = 0x6F) and turn off the test pattern and go back to displaying video from your DSI source

Okay now it looks worse than before.

Can you check if there are any error bits in register 0xE5 being set? Clear this register by writing 0xFF to it before reading it.

Also, are you seeing this issue on multiple units? Do any units show the color correctly? 

Regards,

I.K. 

1. Read back all resisters and confirm they were correctly written    --OK

2. Write 0xFF to register 0xE5 to clear the error registers, then read register 0xE5,the value is 0x00