linux-kernel - [PATCH] platform/x86/amd: pmc: Dump idle mask during "check" stage instead

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Message-ID: <20220929215042.745-1-mario.limonciello@amd.com>
Date:   Thu, 29 Sep 2022 16:50:42 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     <mario.limonciello@....com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>
CC:     Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        <platform-driver-x86@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] platform/x86/amd: pmc: Dump idle mask during "check" stage instead

The idle mask is dumped during the "prepare" and "restore" stage
right now, which helps to demonstrate issues only related to the
first s2idle entry.

If the system has entered s2idle once, but was woken up never
breaking the s2idle loop but also never went back to sleep we
might still have another issue to deal with however.

Move the dynamic debugging message here so that we'll catch it on
each iteration.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=216516
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/platform/x86/amd/pmc.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c
index 047e47449ff93..ce859b300712b 100644
--- a/drivers/platform/x86/amd/pmc.c
+++ b/drivers/platform/x86/amd/pmc.c
@@ -719,8 +719,6 @@ static void amd_pmc_s2idle_prepare(void)
 		}
 	}
 
-	/* Dump the IdleMask before we send hint to SMU */
-	amd_pmc_idlemask_read(pdev, pdev->dev, NULL);
 	msg = amd_pmc_get_os_hint(pdev);
 	rc = amd_pmc_send_cmd(pdev, arg, NULL, msg, 0);
 	if (rc) {
@@ -738,6 +736,9 @@ static void amd_pmc_s2idle_check(void)
 	struct amd_pmc_dev *pdev = &pmc;
 	int rc;
 
+	/* Dump the IdleMask before we add to the STB */
+	amd_pmc_idlemask_read(pdev, pdev->dev, NULL);
+
 	rc = amd_pmc_write_stb(pdev, AMD_PMC_STB_S2IDLE_CHECK);
 	if (rc)
 		dev_err(pdev->dev, "error writing to STB: %d\n", rc);
@@ -757,9 +758,6 @@ static void amd_pmc_s2idle_restore(void)
 	/* Let SMU know that we are looking for stats */
 	amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_DUMP_DATA, 0);
 
-	/* Dump the IdleMask to see the blockers */
-	amd_pmc_idlemask_read(pdev, pdev->dev, NULL);
-
 	rc = amd_pmc_write_stb(pdev, AMD_PMC_STB_S2IDLE_RESTORE);
 	if (rc)
 		dev_err(pdev->dev, "error writing to STB: %d\n", rc);
-- 
2.34.1