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authorJohn Zhao <john.zhao@intel.com>2021-09-13 12:31:39 -0700
committerFelix Held <felix-coreboot@felixheld.de>2021-10-11 12:46:39 +0000
commit7227cef0d7baafdabf9294ad577c09a5d4e93e43 (patch)
treeb071999d31fe1025d899dc7711e16f4a5d4b2541 /src/lib/spd_bin.c
parente0bff814da754f4c44fb5702fb9cfb70f02c1611 (diff)
soc/intel/tigerlake: Add ACPI addition for USB4/TBT latency optimization
The PCI-SIG engineering change requirement provides the ACPI additions for firmware latency optimization. This change adds additional ACPI DSM function with both of FW_RESET_TIME and FW_D3HOT_TO_D0_TIME to the USB4/TBT topology. The OS is informed to reduce latency for upstream ports while connecting USB4/TBT devices. BUG=b:199757442 TEST=It was validated that the first connected device waits only 50ms instead of 100ms and all functions work on Voxel board. Signed-off-by: John Zhao <john.zhao@intel.com> Change-Id: I5a19118b75ed0a78b7436f2f90295c03928300d7 Reviewed-on: https://review.coreboot.org/c/coreboot/+/57625 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
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