linux-kernel - [PATCH v5 2/4] platform/x86/amd: pmc: Report duration of time in hw sleep state

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Message-ID: <20230330194439.14361-3-mario.limonciello@amd.com>
Date:   Thu, 30 Mar 2023 14:44:36 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     Sven van Ashbrook <svenva@...omium.org>,
        John Stultz <jstultz@...gle.com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>
CC:     Raul Rangel <rrangel@...omium.org>,
        David E Box <david.e.box@...el.com>,
        Rajat Jain <rajatja@...gle.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        <linux-kernel@...r.kernel.org>,
        <platform-driver-x86@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        "Mario Limonciello" <mario.limonciello@....com>,
        Mark Gross <markgross@...nel.org>
Subject: [PATCH v5 2/4] platform/x86/amd: pmc: Report duration of time in hw sleep state

amd_pmc displays a warning when a suspend didn't get to the deepest
state and a dynamic debugging message with the duration if it did.

Rather than logging to dynamic debugging the duration spent in the
deepest state, report this to the standard kernel reporting
infrastructure so that userspace software can query after the
suspend cycle is done.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/platform/x86/amd/pmc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c
index 2edaae04a691..2c1ea9c14819 100644
--- a/drivers/platform/x86/amd/pmc.c
+++ b/drivers/platform/x86/amd/pmc.c
@@ -393,9 +393,8 @@ static void amd_pmc_validate_deepest(struct amd_pmc_dev *pdev)
 
 	if (!table.s0i3_last_entry_status)
 		dev_warn(pdev->dev, "Last suspend didn't reach deepest state\n");
-	else
-		dev_dbg(pdev->dev, "Last suspend in deepest state for %lluus\n",
-			 table.timein_s0i3_lastcapture);
+	pm_set_hw_sleep_time(table.s0i3_last_entry_status ?
+			     table.timein_s0i3_lastcapture : 0);
 }
 
 static int amd_pmc_get_smu_version(struct amd_pmc_dev *dev)
-- 
2.34.1