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Description: |
The objective of this project is to enable USB2.0 functionality while USB3.1 is in used on our device.
Our device is Qualcomm XR1 (SDM710 chipset). It only has a single USB-C port which makes up by one USB3.1, one USB2.0 and one CC port. Due to the QPNP framework by Qualcomm, the DWC3 controller in the firmware does not seem to 'free up' USB2.0 when the USB-C is in used.
Hence, we are looking for an expert that can help customize the relevant kernel drivers and enable the working of USB2.0 and USB3.1 simultaneously/concurrently through the DWC3 controller.
this is the overview of our current system design. and we are facing issues with our USB-C because of our DP display (via DP ALT Mode). you may assume the DP display needs to be working at all times -> this mean USB3.1 and CC would be in used for the display all the time.
so customization will need to (priority ranked as below):
1. free up USB2.0 so we can connect it to PC/peripheral
2. when USB-C is plugged in, the PD controller (PM670L) needs to switch from display to charging/supplying power. For this, you can assume display to be turned off right before you do the CC switch. |
