TUSB1046-DCI: Can TUSB1046 be configured with TPS65987D for both PD3.0 and Display Port Alt mode

Hi,

Yes, for MIPI DSI to DP, you can use SN65DSI86 as a possible solution, but it does not support audio over DP. 

To implement DSI to DP solution, SN65DSI86 is designed with ASSR enabled by default to support the eDP panel. Most DP monitors or panels do not support ASSR. To support DP monitors, DSI86’s ASSR will need to be disabled by making ASSR_CONTROL read/write instead of read-only. The first step to make ASSR_CONTROL read/write is to make sure TEST2 pin is be sampled high at the rising edge of EN pin. It is recommended to pull TEST2 pin to 1.8V thru a 1k to 10k resistor. Once TEST2 is high, the following steps must be performed:

1. Write 0x07 to register 0xFF. This will select Page 7.
2. Write 0x01 to register 0x16. This will make ASSR_CONTROL to be read/write.
3. Write 0x00 to register 0xFF. This will select Page 0.
4. Write 0 to bits 1:0 at register 0x5A. This will change from ASSR to Standard DP.

For PD controller, you can use TPS65987D which is certified by the USB-IF for PD3.0 and has the ability to source and sink up to 20 V/5 A.

For the x-point MUX, you can use TUSB546A-DCI (USB3.2 Gen 1 5Gbps) or TUSB1046A-DCI (USB3.2 Gen 2 10Gbps).

If you need a USB2.0 redriver, you can also consider TUSB211A as a possible solution. 

Thanks

David

Hi Paras,

Thanks for your reply. The TPS65987D should be able to support your needs, but please know that there is limited FW support for this product going forward as it is ROM based. As far as alternate mode entry goes, the PD controller can do DP1.4 negotiation, but does not handle the data itself. You can use the data status register of the PD controller found in the Technical Reference Manual. For ease of access, you can find the technical reference manual linked here:

https://www.ti.com/lit/ug/slvubh2b/slvubh2b.pdf?ts=1686259348367&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS65987D

Thanks,

Matt

That is correct.

Thanks,

Matt

Hi Paras,

Yes, there is a 0x51 DP Config/Capabilities register that needs to be configured correctly for DP source. Please see this app note:

TPS6598x_DPAltMode_slva844b.pdf

Please note this is no longer available on ti.com, as we align our product advertisement on ti.com with our internal support plans.

Best,

Alex