SN65DSI83: color bar is OK, but reg. 0xE5 = 80 error

Robin Liu

Intellectual 1930 points

Part Number: SN65DSI83

now the panel can't show ,but color bar mode is OK,

circuit: RK3399 -> SN65DSI83 -> 1024X600lvds panel;

read the register 0xE5 = 80;

if attach the scope probe to the data lane, there will be 2 error as the screenshot picture.

over 7 years ago

0 Ikechukwu Anyiam over 7 years ago

TI__Mastermind 35130 points

Hello Robin,

Are you following the recommended initialization sequence described in Table 2 of the datasheet?

Regards,
I.K.

0 Robin Liu over 7 years ago in reply to Ikechukwu Anyiam

TI__Intellectual 1930 points

well, it's difficult to say whether there is something mismatch to the sequence. Could you help provide some tips or generally speaking what would cause this error?

0 Ikechukwu Anyiam over 7 years ago in reply to Robin Liu

TI__Mastermind 35130 points

Hello Robin,

Not following the sequence is a potential cause of the error, as it is a requirement of the MIPI spec that the DSI clock and data lanes are in LP11 before the EN assertion. Can you share a scope capture showing Vcc, EN, DA0N, and DACN at power up?

Regards,
I.K.

0 Ikechukwu Anyiam over 7 years ago in reply to Ikechukwu Anyiam

TI__Mastermind 35130 points

Hello Robin,

Are you still having issues with this?

Regards,
I.K.

0 Robin Liu over 7 years ago in reply to Ikechukwu Anyiam

TI__Intellectual 1930 points

Hi I.K,

Please there is no further update from customer side, so it's OK for you to close this post.

Regards
Robin Liu

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SN65DSI83: color bar is OK, but reg. 0xE5 = 80 error