Bug 207381 - No Intel Telemetry on GLK system
Summary: No Intel Telemetry on GLK system
Status: RESOLVED INVALID
Alias: None
Product: Drivers
Classification: Unclassified
Component: Platform_x86 (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_platform_x86@kernel-bugs.osdl.org
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-04-21 06:27 UTC by Kai-Heng Feng
Modified: 2020-06-11 03:35 UTC (History)
1 user (show)

See Also:
Kernel Version: mainline
Subsystem:
Regression: No
Bisected commit-id:

Attachments
acpidump (450.69 KB, text/plain)
2020-04-21 06:27 UTC, Kai-Heng Feng 		Details
dmesg (66.04 KB, text/plain)
2020-04-21 06:28 UTC, Kai-Heng Feng 		Details
Add an attachment (proposed patch, testcase, etc.)

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?
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