DS90UB949-Q1: Set video1080p's EDID profile without audio

sheng h

Prodigy 10 points

Part Number: DS90UB949-Q1

Tool/software:

The hardware we use is DS90UB949-DS90UB948，

How to write a 1080p profile without audio to Internal EDID (SRAM)

9 months ago

0 Fadi Abdulhameed 9 months ago

TI__Mastermind 29815 points

Hello,

I'll review and get back to you tomorrow.

Regards,
Fadi A.

0 Moon Wang 9 months ago in reply to Fadi Abdulhameed

TI__Intellectual 1285 points

Thanks for supporting. look forward to getting your feedback soon.

0 Fadi Abdulhameed 9 months ago in reply to Moon Wang

TI__Mastermind 29815 points

Hey Moon,

I've answered this question on a different thread. Please see link below.

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1281846/ds90uh949-q1evm-video-generation-without-edid/4864290?tisearch=e2e-sitesearch&keymatch=Fadi%252520AND%252520EDID#4864290

Regards,
Fadi A.

0 sheng h 9 months ago in reply to Fadi Abdulhameed

Prodigy 10 points

Hey Fadi Abdulhameed

I solved the EDID problem by letting soc output a specific 1080p, and DS90UB949 would switch automatically.
Now there is another problem that we need to make the D_GPIO of DS90UB948 change with the DS90UB949D_GPIO. What registers need to be set.
Our backlight control PWM signal is going to this channel.

0 Fadi Abdulhameed 9 months ago in reply to sheng h

TI__Mastermind 29815 points

Hey Sheng,

Glad to hear the EDID issue is resolved!

There is a table in the datasheet that explains how to map GPIOs in forward direction (SER to DES) or back channel direction (DES to SER). Just follow the SER register override and DES register override for the GPIO you need and the direction you need. Depending on which GPIO you want to map you can use table below.

Regards,
Fadi A.

Interface

Interface forum

DS90UB949-Q1: Set video1080p's EDID profile without audio