linux-kernel - [PATCH v9 2/4] platform/x86/amd: pmc: Report duration of time in hw sleep state

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Date:   Thu, 13 Apr 2023 20:23:43 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     Box David E <david.e.box@...el.com>, <jstultz@...gle.com>,
        <pavel@....cz>, <svenva@...omium.org>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>
CC:     <rrangel@...omium.org>, Jain Rajat <rajatja@...gle.com>,
        <hdegoede@...hat.com>,
        Mario Limonciello <mario.limonciello@....com>,
        "Mark Gross" <markgross@...nel.org>,
        <platform-driver-x86@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v9 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>
---
v7->v8:
 * Report max hw sleep time as well.
---
 drivers/platform/x86/amd/pmc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c
index 2edaae04a691..e610457136e6 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_report_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)
@@ -1015,6 +1014,7 @@ static int amd_pmc_probe(struct platform_device *pdev)
 	}
 
 	amd_pmc_dbgfs_register(dev);
+	pm_report_max_hw_sleep(U64_MAX);
 	return 0;
 
 err_pci_dev_put:
-- 
2.34.1