Other Parts Discussed in Thread: TUSB1146, TUSB1064
We're facing on the problem display port feature doesn't work in our newly developed device using TPS65987D, TUSB1046 and TUSB1164.
Hardware is configured as an attached block diagram.
PDC_USBSWITCH_ForDP_210409.pdf
As you see, we are using two PD controller (TPS65987D) and switch IC (TUSB1046 and TUSB1164) for DeMUX and MUX USB-SS signals and supporsing following sequence.
(#1) Exnternal display connect
(#2) HPD detected via CC line and PDContoller-2 set its own HPD line to high and set HPDIN of TUSB1146 to High.
(#3)MSP430 (MPU) can detect above HPD signal alternation by getting I2C-IRQ
(#4)MSP430 (MPU) set HPD of PDController-1 to High via I2C command and set HPDIN of TUSB1064 High.
(#5)Smartphone can detect HPD via CC1 line from PDController-1 and then begin DP output.
However, we couldn't set HPD-high to PDController-1 after MPU have gotten HPD detection from PDContoller-2 when external display connected (#4 sequence doen't work).
Culd you please check our circuit design can work for DP output and let me know the way to succesfully do #4 sequence?
FCNT Yoshizaki