linux-kernel - [RFC v4 2/5] platform/x86/amd: pmc: Report duration of time in deepest hw state

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Date:   Thu, 17 Nov 2022 16:58:18 -0600
From:   Mario Limonciello <mario.limonciello@....com>
To:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>
CC:     Sven van Ashbrook <svenva@...omium.org>,
        Raul Rangel <rrangel@...omium.org>, <linux-pm@...r.kernel.org>,
        <platform-driver-x86@...r.kernel.org>, Pavel Machek <pavel@....cz>,
        Len Brown <len.brown@...el.com>,
        John Stultz <jstultz@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Rajneesh Bhardwaj <irenic.rajneesh@...il.com>,
        Rajat Jain <rajatja@...gle.com>,
        David E Box <david.e.box@...el.com>,
        Hans de Goede <hdegoede@...hat.com>,
        <linux-kernel@...r.kernel.org>,
        Mario Limonciello <mario.limonciello@....com>,
        Mark Gross <markgross@...nel.org>
Subject: [RFC v4 2/5] platform/x86/amd: pmc: Report duration of time in deepest hw 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 kernel for usage in displaying
to an end user.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
RFC v4:
 * Report time to kernel again, letting kernel calculate percentage
---
 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 96e790e639a2..2e3d8ff5659e 100644
--- a/drivers/platform/x86/amd/pmc.c
+++ b/drivers/platform/x86/amd/pmc.c
@@ -363,9 +363,8 @@ 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);
 }
 #endif
 
-- 
2.34.1