| Message ID | 20210315065328.54680-1-acelan.kao@canonical.com |
|---|---|
| Headers | show |
| Series | Intel e1000e blocks the system to enter PC10 on TGL platform | expand |
On 15.3.2021 8.53, AceLan Kao wrote: > From: "Chia-Lin Kao (AceLan)" <acelan.kao@canonical.com> > > BugLink: https://bugs.launchpad.net/bugs/1919116 > > [Impact] > The deepest package cstate is PC9 and fails to enter low power mode during > s2i on Tiger Lake platform. > > [Fix] > Intel provides a fix for TGL platform > https://patchwork.kernel.org/project/platform-driver-x86/patch/20210305190608.1834164-1-david.e.box@linux.intel.com/ > > [Test] > Verified on Dell TGL platforms and it works as expected. > > [Where problem could occur] > It actually adds a quirk for tgl platform to ignore Latency Tolerance > Reporting (LTR) in pmc_core driver, that makes GBE on TGL won't block the > system to enter deeper PC state. It should be safe for all TGL platforms. > > [Misc] > Currently, this commit is not accepted and a v2 is expected. So, submit > this commit to oem kernel only and will revert it and submit final version > of this patch to ubuntu kernels later. > > David E. Box (1): > UBUNTU: SAUCE: platform/x86: intel_pmc: Ignore GBE LTR on Tiger Lake > platforms > > drivers/platform/x86/intel_pmc_core.c | 55 ++++++++++++++++++++------- > 1 file changed, 42 insertions(+), 13 deletions(-) > applied to oem-5.10, thanks
From: "Chia-Lin Kao (AceLan)" <acelan.kao@canonical.com> BugLink: https://bugs.launchpad.net/bugs/1919116 [Impact] The deepest package cstate is PC9 and fails to enter low power mode during s2i on Tiger Lake platform. [Fix] Intel provides a fix for TGL platform https://patchwork.kernel.org/project/platform-driver-x86/patch/20210305190608.1834164-1-david.e.box@linux.intel.com/ [Test] Verified on Dell TGL platforms and it works as expected. [Where problem could occur] It actually adds a quirk for tgl platform to ignore Latency Tolerance Reporting (LTR) in pmc_core driver, that makes GBE on TGL won't block the system to enter deeper PC state. It should be safe for all TGL platforms. [Misc] Currently, this commit is not accepted and a v2 is expected. So, submit this commit to oem kernel only and will revert it and submit final version of this patch to ubuntu kernels later. David E. Box (1): UBUNTU: SAUCE: platform/x86: intel_pmc: Ignore GBE LTR on Tiger Lake platforms drivers/platform/x86/intel_pmc_core.c | 55 ++++++++++++++++++++------- 1 file changed, 42 insertions(+), 13 deletions(-)