The upstream patch is here.
commit d1635448f1105e549b4041aab930dbc6945fc635 (tag:
platform-drivers-x86-v5.12-2)
Author: David E. Box <david.e....@linux.intel.com>
Date: Fri Mar 19 13:18:44 2021 -0700
platform/x86: intel_pmc_core: Ignore GBE LTR on Tiger Lake platforms
Due to a HW limitation, the Latency Tolerance Reporting (LTR) value
programmed in the Tiger Lake GBE controller is not large enough to allow
the platform to enter Package C10, which in turn prevents the platform from
achieving its low power target during suspend-to-idle. Ignore the GBE LTR
value on Tiger Lake. LTR ignore functionality is currently performed solely
by a debugfs write call. Split out the LTR code into its own function that
can be called by both the debugfs writer and by this work around.
Signed-off-by: David E. Box <david.e....@linux.intel.com>
Reviewed-by: Sasha Neftin <sasha.nef...@intel.com>
Cc: intel-wired-...@lists.osuosl.org
Reviewed-by: Rajneesh Bhardwaj <irenic.rajne...@gmail.com>
Link:
https://lore.kernel.org/r/20210319201844.3305399-2-david.e....@linux.intel.com
Signed-off-by: Hans de Goede <hdego...@redhat.com>
** Changed in: linux-oem-5.13 (Ubuntu Focal)
Status: New => Invalid
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.10 (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Also affects: linux-oem-5.13 (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Focal)
Status: New => Invalid
** Changed in: linux (Ubuntu Hirsute)
Status: New => In Progress
** Changed in: linux (Ubuntu Impish)
Status: New => Invalid
** Changed in: linux (Ubuntu Hirsute)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Changed in: linux-oem-5.10 (Ubuntu Hirsute)
Status: New => Invalid
** No longer affects: linux-oem-5.13 (Ubuntu)
** Changed in: linux-oem-5.13 (Ubuntu Hirsute)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1919116
Title:
Intel e1000e blocks the system to enter PC10 on TGL platform
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