MIPI display issue

[MaxChou]

Dear  Sir.

I have a MIPI display color error issue, its fail rate is about 1-2% when power up,

please refer below picture,

when we reset the MiPi core by memdbg. display will become normal,

MIPI_DSI_PWR_UP register,

memdbg u32 0x021E0004 =00000000@@

memdbg u32 0x021E0004 = 00000001

could you give me some advise to fix this issue or some thing we could try to add in the MIPI driver?

abnormal display color change to Green or Red

[igorpadykov]

Hi Max

it may be recommended to check power supply VDDHIGH_IN, VDDHIGH_CAP, it powers

MIPI block NVCC_MIPI, and move it first, if possible, along with

VDDSNVS in power-up sequence. In general extending POR also may help.

Best regards

igor

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[MaxChou]

Dear  Igor

Thanks for your quick reply,

could you explain more detail?

I am not full understanding what you mean,

thank you very much.

Max

[igorpadykov]

Hi Max

1  check power supply VDDHIGH_IN, VDDHIGH_CAP voltage ripples

2. extend POR up to 1 sec.

3 change power-up sequence so VDDHIGH was 1 step with VSNVS

Best regards

igor