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| author | Furquan Shaikh <furquan@chromium.org> | 2017-10-17 15:06:37 -0700 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2017-10-19 00:43:45 +0000 |
| commit | dd825fe73ec9832ff100955cf564dea68cee2d81 (patch) | |
| tree | e941c884a44db4bacba5b7820494613ee3706969 /src/soc/intel | |
| parent | 7284efe594114c7bcc933550ade9f728cbf0ca8f (diff) | |
| download | coreboot-dd825fe73ec9832ff100955cf564dea68cee2d81.tar.xz | |
soc/intel/skylake: Probe XHCI for wake source for Internal PME
If GPE_STS indicates that the wake source is internal PME, but none of
the controllers have the PME_STS bit set, then try probing individual
XHCI ports to see if one of those was a wake source. In some cases
e.g. gsmi logging with S0ix, pci_pm_resume_noirq runs before gsmi
callback and clears PME_STS_BIT in controller register. In such cases,
xhci port status might provide a better idea about the wake source.
BUG=b:67874513
Change-Id: I841bb2abccfa9bd6553c1513e88a6306b40315e4
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/22089
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/skylake/elog.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/elog.c b/src/soc/intel/skylake/elog.c index 2be6b7bc22..25a9610b53 100644 --- a/src/soc/intel/skylake/elog.c +++ b/src/soc/intel/skylake/elog.c @@ -226,6 +226,16 @@ static void pch_log_pme_internal_wake_source(void) dev_found = true; } + /* + * If device is still not found, but the wake source is internal PME, + * try probing XHCI ports to see if any of the USB2/3 ports indicate + * that it was the wake source. This path would be taken in case of GSMI + * logging with S0ix where the pci_pm_resume_noirq runs and clears the + * PME_STS_BIT in controller register. + */ + if (!dev_found) + dev_found = pch_xhci_update_wake_event(PCH_DEV_XHCI); + if (!dev_found) elog_add_event_wake(ELOG_WAKE_SOURCE_PME_INTERNAL, 0); } |