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Mathias Nyman 10cb7d53be usb: acpi: add helper to check port lpm capability using acpi _DSM 
commit cd702d18c8 upstream.

Add a helper to evaluate ACPI usb device specific method (_DSM) provided
in case the USB3 port shouldn't enter U1 and U2 link states.

This _DSM was added as port specific retimer configuration may lead to
exit latencies growing beyond U1/U2 exit limits, and OS needs a way to
find which ports can't support U1/U2 link power management states.

This _DSM is also used by windows:
Link: https://docs.microsoft.com/en-us/windows-hardware/drivers/bringup/usb-device-specific-method---dsm-

Some patch issues found in testing resolved by Ron Lee

Cc: stable@vger.kernel.org
Tested-by: Ron Lee <ron.lee@intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230116142216.1141605-7-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2023-01-24 07:22:44 +01:00
..
acpi ACPI: APEI: Fix integer overflow in ghes_estatus_pool_init() 2022-11-10 18:15:34 +01:00
asm-generic mm/khugepaged: fix GUP-fast interaction by sending IPI 2022-12-14 11:37:17 +01:00
clocksource drivers: hv: Decouple Hyper-V clock/timer code from VMbus drivers 2021-07-19 09:24:28 +00:00
crypto crypto: blake2s - remove shash module 2022-08-17 14:24:19 +02:00
drm drm/bridge: Add stubs for devm_drm_of_get_bridge when OF is disabled 2022-09-05 10:30:03 +02:00
dt-bindings clk: imx8mn: rename vpu_pll to m7_alt_pll 2022-12-31 13:14:12 +01:00
keys integrity-v5.13 2021-05-01 15:32:18 -07:00
kunit kunit: fix kernel-doc warnings due to mismatched arg names 2021-10-06 17:54:07 -06:00
kvm KVM: arm64: Fix PMU probe ordering 2021-09-20 12:43:34 +01:00
linux usb: acpi: add helper to check port lpm capability using acpi _DSM 2023-01-24 07:22:44 +01:00
math-emu math-emu: Fix fall-through warning 2021-07-13 13:57:44 -05:00
media media: dvbdev: fix build warning due to comments 2022-12-31 13:14:47 +01:00
memory memory: renesas-rpc-if: Fix HF/OSPI data transfer in Manual Mode 2022-05-09 09:14:34 +02:00
misc ocxl: Update the Process Element Entry 2020-12-04 01:01:30 +11:00
net netfilter: nf_tables: honor set timeout and garbage collection updates 2023-01-12 11:59:09 +01:00
pcmcia pcmcia: Replace zero-length array with flexible-array 2020-05-18 10:28:31 +02:00
ras Revert "mm/memory-failure.c: fix race with changing page compound again" 2022-07-12 16:35:17 +02:00
rdma RDMA/netlink: Add __maybe_unused to static inline in C file 2021-11-25 09:49:07 +01:00
scsi scsi: iscsi: Add recv workqueue helpers 2022-10-26 12:35:15 +02:00
soc ARM: at91: pm: avoid soft resetting AC DLL 2022-11-26 09:24:34 +01:00
sound ASoC/SoundWire: dai: expand 'stream' concept beyond SoundWire 2023-01-12 11:58:49 +01:00
target scsi: target: Fix ordered tag handling 2021-11-25 09:48:29 +01:00
trace btrfs: fix trace event name typo for FLUSH_DELAYED_REFS 2023-01-24 07:22:41 +01:00
uapi eventpoll: add EPOLL_URING_WAKE poll wakeup flag 2023-01-24 07:22:43 +01:00
vdso time64.h: Consolidated PSEC_PER_SEC definition 2021-04-06 16:32:17 -07:00
video video: of_display_timing.h: include errno.h 2022-07-12 16:35:10 +02:00
xen xen/gnttab: fix gnttab_end_foreign_access() without page specified 2022-03-11 12:22:37 +01:00