I pushed a couple of days ago when the forum was down to the unstable branch:
linux-rpi4 5.4.58-1 linux-rpi4-headers 5.4.58-2 rpi-eeprom 2020.07.31-1
Today I was notified by the RPi people that my issue was resolved I opened regarding non working usb ports with the pi4 8G boards with the 5.8-rc kernel. When I first opened the issue the kernel was still in the rc status but now it has been upgraded to 5.8.1. Because of this the linux-rpi4-mainline 5.7.9-1 kernel/headers packages has now been upgraded in the unstable branch (when the mirrors sync):
linux-rpi4-mainline 5.8.1-1 linux-rpi4-mainline-headers-5.8.1-1
In all of the new kernel packages here I have added “usbhid.mousepoll=8” to /boot/cmdline.txt to help with the mouse refresh rate which will help with some mouses that do not play well trying to use it’s default with the linux default config. The number 8 can be increased (or decreased) to your liking with the mouse movement.