falco: Re-read critical temperatures in ACPI _TMP
There seem to be a significant number of shutdowns during suspend resume
tests related to critical temperatures. It is possible that we are getting
a bad reading from PECI and shutting down prematurely in some cases.
If we get a reading that is above critical then wait for the EC to re-poll
and then re-check the temperature in case it was just a bad reading.
Also add some ACPI debug messages when this happens.
BUG=chrome-os-partner:19980
BRANCH=falco,peppy
TEST=emerge-falco chromeos-coreboot-falco
Original-Change-Id: I0ab7bdcc50d133981c0f36fc696b06d4a1d939a7
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/66937
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit a39d7b11dd7b2af37fc2658542d56b32e3966ed4)
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Change-Id: Ib612266511d90749ec6507f8467c71523ee8fb95
Reviewed-on: https://chromium-review.googlesource.com/66939
Tested-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Duncan Laurie <dlaurie@chromium.org>
diff --git a/src/mainboard/google/falco/acpi/thermal.asl b/src/mainboard/google/falco/acpi/thermal.asl
index f9173b7..d07c807 100644
--- a/src/mainboard/google/falco/acpi/thermal.asl
+++ b/src/mainboard/google/falco/acpi/thermal.asl
@@ -75,7 +75,7 @@
Return (\PPKG ())
}
- Method (_TMP, 0, Serialized)
+ Method (TCHK, 0, Serialized)
{
// Get Temperature from TIN# set in NVS
Store (\_SB.PCI0.LPCB.EC0.TINS (TMPS), Local0)
@@ -107,6 +107,31 @@
Multiply (Local0, 10, Local0)
Return (Local0)
}
+
+ Method (_TMP, 0, Serialized)
+ {
+ // Get temperature from EC in deci-kelvin
+ Store (TCHK (), Local0)
+
+ // Critical temperature in deci-kelvin
+ Store (CTOK (\TCRT), Local1)
+
+ If (LGreaterEqual (Local0, Local1)) {
+ Store ("CRITICAL TEMPERATURE", Debug)
+ Store (Local0, Debug)
+
+ // Wait 1 second for EC to re-poll
+ Sleep (1000)
+
+ // Re-read temperature from EC
+ Store (TCHK (), Local0)
+
+ Store ("RE-READ TEMPERATURE", Debug)
+ Store (Local0, Debug)
+ }
+
+ Return (Local0)
+ }
}
}
