UBUNTU: SAUCE: platform/x86: intel_pmc_core: Add GBE Package C10 fix …

…for Alder Lake PCH

BugLink: https://bugs.launchpad.net/bugs/1934660

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.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
(cherry picked from
https://patchwork.kernel.org/project/platform-driver-x86/patch/bb897d898c060da4bc20d3d866193c53c6fd4ee1.1625191274.git.gayatri.kammela@intel.com/)
Signed-off-by: You-Sheng Yang <vicamo.yang@canonical.com>
Signed-off-by: Timo Aaltonen <timo.aaltonen@canonical.com>

drivers/platform/x86/intel_pmc_core.c

@@ -1983,10 +1983,10 @@ 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);
 	}