platform/x86: intel_telemetry: Fix suspend stats

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Suspend stats are not reported consistently due to a limitation in the PMC
firmware. This limitation causes a delay in updating the s0ix counters and
residencies in the telemetry log upon s0ix exit. As a consequence, reading
these counters from the suspend-exit notifier may result in zero read.

This patch fixes this issue by cross-verifying the s0ix residencies from
the GCR TELEM registers in case the counters are not incremented in the
telemetry log after suspend.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=197833

Reported-and-tested-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

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Chakravarty, Souvik K 2017-11-24 19:04:42 +05:30 • committed by Andy Shevchenko

parent 9c916549c0

commit 0946a05fd2

1 changed files with 25 additions and 0 deletions

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drivers/platform/x86/intel_telemetry_debugfs.c

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