linux/drivers/platform
Mario Limonciello fbb404ab4e platform/x86: thinkpad_acpi: Add a s2idle resume quirk for a number of laptops
Lenovo laptops that contain NVME SSDs across a variety of generations have
trouble resuming from suspend to idle when the IOMMU translation layer is
active for the NVME storage device.

This generally manifests as a large resume delay or page faults. These
delays and page faults occur as a result of a Lenovo BIOS specific SMI
that runs during the D3->D0 transition on NVME devices.

This SMI occurs because of a flag that is set during resume by Lenovo
firmware:

```
OperationRegion (PM80, SystemMemory, 0xFED80380, 0x10)
Field (PM80, AnyAcc, NoLock, Preserve)
{
	SI3R,   1
}

Method (_ON, 0, NotSerialized)  // _ON_: Power On
{
	TPST (0x60D0)
	If ((DAS3 == 0x00))
	{
		If (SI3R)
		{
			TPST (0x60E0)
			M020 (NBRI, 0x00, 0x00, 0x04, (NCMD | 0x06))
			M020 (NBRI, 0x00, 0x00, 0x10, NBAR)
			APMC = HDSI /* \HDSI */
			SLPS = 0x01
			SI3R = 0x00
			TPST (0x60E1)
		}
		D0NV = 0x01
	}
}
```

Create a quirk that will run early in the resume process to prevent this
SMI from running. As any of these machines are fixed, they can be peeled
back from this quirk or narrowed down to individual firmware versions.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1910
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1689
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Mark Pearson <markpearson@lenvo.com>
Link: https://lore.kernel.org/r/20220429030501.1909-3-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2022-05-06 13:02:27 +02:00
..
chrome chrome platform changes for 5.18 2022-04-02 10:44:18 -07:00
goldfish platform: goldfish: pipe: Use platform_get_irq() to get the interrupt 2022-03-18 13:55:21 +01:00
mellanox platform/mellanox: mlxbf-pmc: Fix an IS_ERR() vs NULL bug in mlxbf_pmc_map_counters 2021-12-21 19:35:22 +01:00
mips MIPS: Loongson64: Add missing of_node_put() in ls2k_reset_init() 2022-01-05 09:53:45 +01:00
olpc spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
surface platform/surface: Remove Surface 3 Button driver 2022-03-02 12:33:00 +01:00
x86 platform/x86: thinkpad_acpi: Add a s2idle resume quirk for a number of laptops 2022-05-06 13:02:27 +02:00
Kconfig
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