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platform/x86/intel: pmc/core: Add GBE Package C10 fix for Alder Lake PCH

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Alder PCH uses the same Gigabit Ethernet (GBE) device as Tiger Lake PCH
which cannot achieve PC10 without ignoring the PMC GBE LTR. Add this
work around for Alder Lake PCH as well.

Cc: Chao Qin <chao.qin@intel.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: You-Sheng Yang <vicamo.yang@canonical.com>
Acked-by: Rajneesh Bhardwaj <irenic.rajneesh@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/9168e8bd687f2d0d5eb0ed116e08d0764eadf7b3.1629091915.git.gayatri.kammela@intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
David E. Box 2021-08-16 09:58:34 -07:00 committed by Hans de Goede
parent 6cfce3ef80
commit 66a91c0021
1 changed files with 3 additions and 3 deletions
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6
drivers/platform/x86/intel/pmc/core.c
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@ -2020,10 +2020,10 @@ static int pmc_core_probe(struct platform_device *pdev)
pmc_core_get_tgl_lpm_reqs(pdev);
/*
* On TGL, due to a hardware limitation, the GBE LTR blocks PC10 when
* a cable is attached. Tell the PMC to ignore it.
* On TGL and ADL, due to a hardware limitation, the GBE LTR blocks PC10
* when a cable is attached. Tell the PMC to ignore it.
*/
if (pmcdev->map == &tgl_reg_map) {
if (pmcdev->map == &tgl_reg_map || pmcdev->map == &adl_reg_map) {
dev_dbg(&pdev->dev, "ignoring GBE LTR\n");
pmc_core_send_ltr_ignore(pmcdev, 3);
}