FAILED: patch "[PATCH] platform/x86/amd: pmc: Add a workaround for an s0i3 issue on" failed to apply to 6.1-stable tree

The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Possible dependencies:

260ad3de7183 ("platform/x86/amd: pmc: Add a workaround for an s0i3 issue on Cezanne")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 260ad3de718301ed8c22e28558e3a31c99f54cf6 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <[email protected]>
Date: Wed, 16 Nov 2022 09:43:41 -0600
Subject: [PATCH] platform/x86/amd: pmc: Add a workaround for an s0i3 issue on
Cezanne

Cezanne platforms under the right circumstances have a synchronization problem where attempting to enter s2idle may fail if the x86 cores are put into HLT before hardware resume from the previous attempt has completed.

To avoid this issue add a 10-20ms delay before entering s2idle another time. This workaround will only be applied on interrupts that wake the hardware but don't break the s2idle loop.

index ef4ae977b8e0..439d282aafd1 100644
@@ -739,8 +739,14 @@ static void amd_pmc_s2idle_prepare(void)
 static void amd_pmc_s2idle_check(void)
 {
 	struct amd_pmc_dev *pdev = &pmc;
+	struct smu_metrics table;
 	int rc;
 
+	/* CZN: Ensure that future s0i3 entry attempts at least 10ms passed */
+	if (pdev->cpu_id == AMD_CPU_ID_CZN && !get_metrics_table(pdev, &table) &&
+	    table.s0i3_last_entry_status)
+		usleep_range(10000, 20000);
+
 	/* Dump the IdleMask before we add to the STB */
 	amd_pmc_idlemask_read(pdev, pdev->dev, NULL);