From 66a91c00218c5f5d19e5bfaada05432c672b8241 Mon Sep 17 00:00:00 2001
From: "David E. Box" <david.e.box@linux.intel.com>
Date: Mon, 16 Aug 2021 09:58:34 -0700
Subject: [PATCH] platform/x86/intel: pmc/core: Add GBE Package C10 fix for
Alder Lake PCH
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>
---
drivers/platform/x86/intel/pmc/core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 42f49ad0793db..ac19fcc9abbf5 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -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);
}