Bug 207381

Summary:	No Intel Telemetry on GLK system
Product:	Drivers	Reporter:	Kai-Heng Feng (kai.heng.feng)
Component:	Platform_x86	Assignee:	drivers_platform_x86 (drivers_platform_x86)
Status:	RESOLVED INVALID
Severity:	normal	CC:	david.e.box
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	mainline	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	acpidump dmesg

Description Kai-Heng Feng 2020-04-21 06:27:09 UTC

I can't find Intel Telemetry debugfs on GLK systems.

Comment 1 Kai-Heng Feng 2020-04-21 06:27:50 UTC

Created attachment 288645 [details]
acpidump

Comment 2 Kai-Heng Feng 2020-04-21 06:28:03 UTC

Created attachment 288647 [details]
dmesg

Comment 3 Kai-Heng Feng 2020-06-02 09:32:09 UTC

David,

Can you please take a look on this bug?
I guess this system just doesn't support telemetry.

Comment 4 David Box 2020-06-04 22:01:54 UTC

Hi Kai-Heng,

You're correct. The DSDT is missing the IPC1 device which is needed to support telemetry. This system likely does not support s0ix if that is what you need the telemetry for. If you require it for a different reason, we may be able to provide a w/a.

Comment 5 Kai-Heng Feng 2020-06-10 08:25:33 UTC

Thanks for the explanation.

Systems default to S3 still have pmc_core support, apparently this is not the case for Atom.

Comment 6 David Box 2020-06-10 16:31:40 UTC

Yes. pmc_core is still useful for debugging issues with runtime power management, but in the case of Atom the IPC1 device was only included on s0ix enabled systems.

Comment 7 Kai-Heng Feng 2020-06-11 03:35:24 UTC

Sounds like IPC1 doesn't report runtime package state?