diff options
| author | Duncan Laurie <dlaurie@google.com> | 2019-04-25 09:06:49 -0700 |
|---|---|---|
| committer | Duncan Laurie <dlaurie@chromium.org> | 2019-04-26 20:07:54 +0000 |
| commit | a2e7ee729ee955d168d887aa73fe0e77024ec2f3 (patch) | |
| tree | 136584450403a33d0f8c0af1e06e326bdfe8dbc5 | |
| parent | 76e70675d9ac9c78260c1e42d4c67f8fa1c806ce (diff) | |
mb/google/sarien: Enable LTR for PCIe NVMe root port
Enable LTR for NVMe so it can use ASPM L1.2.
BUG=b:127593309
TEST=build and boot on sarien and check L1 substate with lspci
before: L1SubCtl1: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2- ASPM_L1.1+
after: L1SubCtl1: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+
Change-Id: I9842beda6767f758556747f83cfcedbd00612698
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32456
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Roy Mingi Park <roy.mingi.park@intel.com>
| -rw-r--r-- | src/mainboard/google/sarien/variants/arcada/devicetree.cb | 1 | ||||
| -rw-r--r-- | src/mainboard/google/sarien/variants/sarien/devicetree.cb | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/src/mainboard/google/sarien/variants/arcada/devicetree.cb b/src/mainboard/google/sarien/variants/arcada/devicetree.cb index 57c4e65e70..cf64c4bb89 100644 --- a/src/mainboard/google/sarien/variants/arcada/devicetree.cb +++ b/src/mainboard/google/sarien/variants/arcada/devicetree.cb @@ -196,6 +196,7 @@ chip soc/intel/cannonlake # PCIe port 13 for M.2 2280 SSD register "PcieRpEnable[12]" = "1" + register "PcieRpLtrEnable[12]" = "1" register "PcieClkSrcUsage[4]" = "12" register "PcieClkSrcClkReq[4]" = "4" diff --git a/src/mainboard/google/sarien/variants/sarien/devicetree.cb b/src/mainboard/google/sarien/variants/sarien/devicetree.cb index 27c0913c6f..96146baf1e 100644 --- a/src/mainboard/google/sarien/variants/sarien/devicetree.cb +++ b/src/mainboard/google/sarien/variants/sarien/devicetree.cb @@ -197,6 +197,7 @@ chip soc/intel/cannonlake # PCIe port 13 for M.2 2280 SSD register "PcieRpEnable[12]" = "1" + register "PcieRpLtrEnable[12]" = "1" register "PcieClkSrcUsage[2]" = "12" register "PcieClkSrcClkReq[2]" = "2" |