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| author | Matt DeVillier <matt.devillier@gmail.com> | 2020-03-15 17:11:18 -0500 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-03-17 08:27:06 +0000 |
| commit | 7790cb680a58bf2a5c869dadbb23fbd6bd680f7d (patch) | |
| tree | 9fd7b734ebf16efe9461b25cfa31b4b1be8b6796 /src/southbridge | |
| parent | 0ae21ff7ff5cee842fd18bbd0e84821f5ab945d8 (diff) | |
| download | coreboot-7790cb680a58bf2a5c869dadbb23fbd6bd680f7d.tar.xz | |
sb/lynxpoint/gpio: fix interrupt storm
On newer kernels (> 4.9 LTS), the GPIO ACPI device's interrupt
resource causes an interrupt storm which prevents the CPU
from properly idling, significantly increasing power consumption.
This was fixed for soc/broadwell (which also supports lynxpoint-lp)
by removing the interrupt resource, so apply the same fix here.
Original fix: https://chromium-review.googlesource.com/203645
Test: build/boot google/wolf, verify CPU0 idles correctly and
power consumption drop via powertop in kernels 4.16.18 and 5.x.
Change-Id: Ic4963f2f0225b5f44a7604b0107911640345c855
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39578
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/southbridge')
| -rw-r--r-- | src/southbridge/intel/lynxpoint/acpi/serialio.asl | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/southbridge/intel/lynxpoint/acpi/serialio.asl b/src/southbridge/intel/lynxpoint/acpi/serialio.asl index 88138a1d61..2a3c096099 100644 --- a/src/southbridge/intel/lynxpoint/acpi/serialio.asl +++ b/src/southbridge/intel/lynxpoint/acpi/serialio.asl @@ -551,8 +551,9 @@ Device (GPIO) , // ResourceSourceIndex , // ResourceSource BAR0) - Interrupt (ResourceConsumer, - Level, ActiveHigh, Shared, , ,) {14} + // Disabled due to IRQ storm: http://crosbug.com/p/29548 + //Interrupt (ResourceConsumer, + // Level, ActiveHigh, Shared, , , ) {14} }) Method (_CRS, 0, NotSerialized) |