The Linux kernel runtime D3 framework expects a PCIe device to have a
power resource in order to be properly power-manageable. The _PR0/_PR3
values were pointing at the PEG0 Device, which is not a PowerResource,
so this must have confused the RTD3 framework and RTD3 was not
functional. Removing the _PR0/_PR3 fixes the problem.
BUG=b:243888246
TEST=echo auto > /sys/bus/pci/devices/0000:01:00.0/power/control;
sleep 10;
echo on > /sys/bus/pci/devices/0000:01:00.0/power/control
After this there are no longer errors seen in dmesg about failing
to place the device into D0.
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: I83fa1e5fabd3257b097c10e7a13c9861872685ea
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67212
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Cliff Huang <cliff.huang@intel.com>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Some brya variants will use a GN20 series Nvidia GPU, which requires
quite a bit of ACPI support code to be written for it. This patch
lands a decent bit of the initial code for it on the brya platform,
including:
1) PEG RTD3 methods
2) DGPU power operations (RTD3 and GCOFF, NVJT _DSM and other Methods)
3) NVOP _DSM method
There will be more support to come later, this is all written to
specifications from the Nvidia Software Design Guide for GN20.
BUG=b:214581763
TEST=build patch train
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Ifce1610210e9636e87dda4b55c8287334adfcc42
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62931
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
