[edk2-devel] [PATCH v2 1/4] Platform/RaspberryPi4: Add a basic thermal zone
Ard Biesheuvel
ard.biesheuvel at arm.com
Thu Aug 27 08:06:28 UTC 2020
On 8/20/20 4:41 PM, Jeremy Linton wrote:
> 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 at nuviainc.com>
>>> Cc: Pete Batard <pete at akeo.ie>
>>> Cc: Andrei Warkentin <awarkentin at vmware.com>
>>> Cc: Ard Biesheuvel <ard.biesheuvel at arm.com>
>>> Cc: Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud at arm.com>
>>> Signed-off-by: Jeremy Linton <jeremy.linton at 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.
>
Mind resending them? Grabbing and applying patches from the web UI is
not really feasible with the groups.io interface.
>
>>
>>> ---
>>> 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__ */
>>>
>>
>
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