sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

soc/intel/tigerlake: Enable TCSS Muxes to disconnect mode during boot

Browse Source 
TCSS muxes being left uninitialized during boot is causing some USB3
devices to downgrade to USB2 speed. To properly configure the Type C ports
the muxes should be set to disconnected state during boot so that the port
mapping of USB2/3 devices is properly setup prior to Kernel initializing
devices.

BUG=b:180426950
BRANCH=firmware-volteer-13672.B
TEST= Connected USB3 storage device and rebooted the system multiple
times to verify that devices were no longer downgrading to USB2 speed.

Change-Id: I4352072a4a7d6ccb1364b38377831f3c22ae8fb4
Signed-off-by: Brandon Breitenstein <brandon.breitenstein@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51194
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This commit is contained in:
Brandon Breitenstein
2021-03-03 14:09:22 -08:00
committed by Furquan Shaikh
parent 54d59ef7b7
commit d8774f6899
5 changed files with 123 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/soc/intel/tigerlake/Kconfig
View File

@@ -239,9 +239,14 @@ config PRERAM_CBMEM_CONSOLE_SIZE
hex
default 0x2000
config EARLY_TCSS
bool "Enable early TCSS device Init"
help
Sets up USB2/3 port mapping in TCSS MUX and sets MUX to disconnect state
config EARLY_TCSS_DISPLAY
bool "Enable early TCSS display"
depends on RUN_FSP_GOP
bool "Enable early TCSS display" if EARLY_TCSS
depends on EARLY_TCSS && RUN_FSP_GOP
help
Enable displays to be detected over Type-C ports during boot.