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Message-Id: <20240827104134.11697-1-wse@tuxedocomputers.com>
Date: Tue, 27 Aug 2024 12:41:33 +0200
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 v2] 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.
v2: Rebase onto v6.11-rc5
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 6cd9395ba9ec3..48beea7e2f249 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2967,6 +2967,17 @@ 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;
}
/*
--
2.34.1
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