From: "Jeremy Linton" <jeremy.linton@arm.com>
To: Ard Biesheuvel <ard.biesheuvel@arm.com>, devel@edk2.groups.io
Cc: Leif Lindholm <leif@nuviainc.com>, Pete Batard <pete@akeo.ie>,
Andrei Warkentin <awarkentin@vmware.com>,
Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>
Subject: Re: [PATCH v2 1/4] Platform/RaspberryPi4: Add a basic thermal zone
Date: Thu, 20 Aug 2020 09:41:00 -0500 [thread overview]
Message-ID: <5ddba0df-11db-7bed-47d5-54614bf1ac30@arm.com> (raw)
In-Reply-To: <6f61bcb3-db9f-4da0-6643-b6365fee677d@arm.com>
Hi,
On 8/20/20 2:59 AM, Ard Biesheuvel wrote:
> On 8/20/20 6:42 AM, Jeremy Linton wrote:
>> Rather than exporting the temp sensor or mailbox
>> in ACPI land we can wrap them in AML and use the default
>> ACPI drivers provided by the OS. This enables the use of
>> "sensors" in linux to report the SOC temp.
>>
>> This commit also adds a basic passive cooling ACPI thermalzone
>> with trip points for passive cooling (throttling) handled
>> by the vc firmware, hibernate and critical shutdown. The
>> vc apparently kicks in at ~80C, so the hibernate and critical
>> set points are set at +5 and +10 of that. In the future
>> CPPC should be able to monitor the thermal throttling.
>>
>> Cc: Leif Lindholm <leif@nuviainc.com>
>> Cc: Pete Batard <pete@akeo.ie>
>> Cc: Andrei Warkentin <awarkentin@vmware.com>
>> Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
>> Cc: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>
>> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
>> Reviewed-by: Pete Batard <@pbatard>
>
> This looks ok to me but I did not receive patch #4 or the cover letter.
I appear to have only CCed the groups.io ML on the cover letter and 4th
patch (which is just whitespace).
Can you find them them there? If not I will just resend the whole series
as v3.
>
>> ---
>> Platform/RaspberryPi/AcpiTables/Dsdt.asl | 31
>> ++++++++++++++++++++++
>> .../Bcm27xx/Include/IndustryStandard/Bcm2711.h | 2 ++
>> 2 files changed, 33 insertions(+)
>>
>> diff --git a/Platform/RaspberryPi/AcpiTables/Dsdt.asl
>> b/Platform/RaspberryPi/AcpiTables/Dsdt.asl
>> index 353af2d876..73067aefd2 100644
>> --- a/Platform/RaspberryPi/AcpiTables/Dsdt.asl
>> +++ b/Platform/RaspberryPi/AcpiTables/Dsdt.asl
>> @@ -252,6 +252,37 @@ DefinitionBlock ("Dsdt.aml", "DSDT", 5, "RPIFDN",
>> "RPI", 2)
>> }
>> })
>> }
>> +
>> + // Define a simple thermal zone. The idea here is we compute the
>> SOC temp
>> + // via a register we can read, and give it to the OS. This
>> enables basic
>> + // reports from the "sensors" utility, and the OS can then poll
>> and take
>> + // actions if that temp exceeds any of the given thresholds.
>> + Device (EC0)
>> + {
>> + Name (_HID, EISAID ("PNP0C06"))
>> + Name (_CCA, 0x0)
>> +
>> + // all temps in are tenths of K (aka 2732 is the min temps in
>> Linux (aka 0C))
>> + ThermalZone (TZ0) {
>> + Method (_TMP, 0, Serialized) {
>> + OperationRegion (TEMS, SystemMemory, THERM_SENSOR, 0x8)
>> + Field (TEMS, DWordAcc, NoLock, Preserve) {
>> + TMPS, 32
>> + }
>> + return (((419949 - ((TMPS & 0x3ff) * 487)) / 100) + 2732);
>> + }
>> + Method (_SCP, 3) { } // receive cooling policy
>> from OS
>> +
>> + Method (_CRT) { Return (3632) } // (90C) Critical temp
>> point (immediate power-off)
>> + Method (_HOT) { Return (3582) } // (85C) HOT state where
>> OS should hibernate
>> + Method (_PSV) { Return (3532) } // (80C) Passive cooling
>> (CPU throttling) trip point
>> +
>> + // SSDT inserts _AC0/_AL0 @60C here, if a FAN is configured
>> +
>> + Name (_TZP, 10) //The OSPM must poll this
>> device every 1 seconds
>> + Name (_PSL, Package () { \_SB_.CPU0, \_SB_.CPU1, \_SB_.CPU2,
>> \_SB_.CPU3 })
>> + }
>> + }
>> #endif
>> }
>> diff --git
>> a/Silicon/Broadcom/Bcm27xx/Include/IndustryStandard/Bcm2711.h
>> b/Silicon/Broadcom/Bcm27xx/Include/IndustryStandard/Bcm2711.h
>> index e9c81cafa1..86906b2438 100644
>> --- a/Silicon/Broadcom/Bcm27xx/Include/IndustryStandard/Bcm2711.h
>> +++ b/Silicon/Broadcom/Bcm27xx/Include/IndustryStandard/Bcm2711.h
>> @@ -86,4 +86,6 @@
>> #define GENET_BASE_ADDRESS FixedPcdGet64
>> (PcdBcmGenetRegistersAddress)
>> #define GENET_LENGTH 0x00010000
>> +#define THERM_SENSOR 0xfd5d2200
>> +
>> #endif /* BCM2711_H__ */
>>
>
next prev parent reply other threads:[~2020-08-20 14:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-20 4:42 [PATCH v2 0/4] Platform/RasberryPi: Thermal zone Jeremy Linton
2020-08-20 4:42 ` [PATCH v2 1/4] Platform/RaspberryPi4: Add a basic thermal zone Jeremy Linton
2020-08-20 7:59 ` Ard Biesheuvel
2020-08-20 14:41 ` Jeremy Linton [this message]
2020-08-27 8:06 ` Ard Biesheuvel
2020-08-27 15:21 ` Jeremy Linton
2020-08-20 4:42 ` [PATCH v2 2/4] Platform/RaspberryPi4: Create ACPI fan object Jeremy Linton
2020-08-20 4:42 ` [PATCH v2 3/4] Platform/RaspberryPi: Add entry for user fan control Jeremy Linton
2020-08-20 16:15 ` Andrei Warkentin
2020-08-21 4:15 ` Jeremy Linton
2020-08-20 4:42 ` [PATCH v2 4/4] Platform/RaspberryPi: Trivial whitespace cleanup Jeremy Linton
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