linux-kernel - [PATCH] nvme-pci: Add sleep quirk for Samsung 990 Evo

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Date: Thu, 28 Mar 2024 14:09:22 +0100
From: Werner Sembach <wse@...edocomputers.com>
To: Keith Busch <kbusch@...nel.org>,
	Jens Axboe <axboe@...nel.dk>,
	Christoph Hellwig <hch@....de>,
	Sagi Grimberg <sagi@...mberg.me>
Cc: Georg Gottleuber <ggo@...edocomputers.com>,
	Werner Sembach <wse@...edocomputers.com>,
	linux-nvme@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] nvme-pci: Add sleep quirk for Samsung 990 Evo

From: Georg Gottleuber <ggo@...edocomputers.com>

On some TUXEDO platforms, a Samsung 990 Evo NVMe leads to a high
power consumption in s2idle sleep (2-3 watts).

This patch applies 'Force No Simple Suspend' quirk to achieve a
sleep with a lower power consumption, typically around 0.5 watts.

Signed-off-by: Georg Gottleuber <ggo@...edocomputers.com>
Signed-off-by: Werner Sembach <wse@...edocomputers.com>
Cc: <stable@...r.kernel.org>
---
 drivers/nvme/host/pci.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index e6267a6aa3801..63f4947c960f9 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2917,6 +2917,17 @@ static unsigned long check_vendor_combination_bug(struct pci_dev *pdev)
 		    dmi_match(DMI_BOARD_NAME, "NS5x_7xPU") ||
 		    dmi_match(DMI_BOARD_NAME, "PH4PRX1_PH6PRX1"))
 			return NVME_QUIRK_FORCE_NO_SIMPLE_SUSPEND;
+	} else if (pdev->vendor == 0x144d && pdev->device == 0xa80d) {
+		/*
+		 * Exclude Samsung 990 Evo from NVME_QUIRK_SIMPLE_SUSPEND
+		 * because of high power consumption (> 2 Watt) in s2idle
+		 * sleep. Only some boards with Intel CPU are affected.
+		 */
+		if (dmi_match(DMI_BOARD_NAME, "GMxPXxx") ||
+		    dmi_match(DMI_BOARD_NAME, "PH4PG31") ||
+		    dmi_match(DMI_BOARD_NAME, "PH4PRX1_PH6PRX1") ||
+		    dmi_match(DMI_BOARD_NAME, "PH6PG01_PH6PG71"))
+			return NVME_QUIRK_FORCE_NO_SIMPLE_SUSPEND;
 	}
 
 	return 0;
-- 
2.34.1