TPS65982: TPS65982: Display Port AUX Channel muxing

Hello,

I've assigned this issue to the relevant expert who will get back to you shortly.

Hello,

We do not have a register to check Mux configuration.

Are you seeing data on connector but not seeing on the PD controller pins which are connected to DP controller?

Tnx

Prajith 

I'm seeing successful pd contract and dp-alt-mode negotiation, also usb 2.0 data.  But am looking for  way to verify aux is pulled to the correct levels since aux mode communication is running into timeouts.

- Any voltage levels i could measure reliably although the downstream side also pulls up aux/sbu?

- Is there a reference schematic showing the chip in a UFP_D configuration that shows required pullups / capacitance for the aux lanes . https://e2e.ti.com/support/interface/f/138/t/651978?tisearch=e2e-sitesearch&keymatch=tps65982%2520aux%2520pullup

Hi,

Apologies for the delay. 

I'll get back to you by tomorrow. 

Regards

Prajith

Hello,

You can refer https://www.ti.com/lit/ug/sllu248b/sllu248b.pdf?&ts=1589716070947 for UFP_D schematic. TPS65986 is being used in this design. 86 is improved version of 82. 

Tnx

Prajith 

Thanks. So there's no external pullups/pulldowns needed on the dp aux_p/n between a DP source and the tps68982 since that is handled by the tps65982 internally/