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5e31ee84c0
linux/drivers/acpi
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Hans de Goede 5e31ee84c0 ACPI / LPSS: Resume Cherry Trail PWM controller in no-irq phase 
The DSDTs on most Cherry Trail devices have an ugly clutch where the PWM
controller gets poked from the _PS0 method of the graphics-card device:

	Local0 = PSAT /* \_SB_.PCI0.GFX0.PSAT */
	If (((Local0 & 0x03) == 0x03))
	{
	    PSAT &= 0xFFFFFFFC
	    Local1 = PSAT /* \_SB_.PCI0.GFX0.PSAT */
	    RSTA = Zero
	    RSTF = Zero
	    RSTA = One
	    RSTF = One
	    PWMB |= 0xC0000000
	    PWMC = PWMB /* \_SB_.PCI0.GFX0.PWMB */
	}

Where PSAT is the power-status register of the PWM controller, so if it
is in D3 when the GFX0 device's PS0 method runs then it will turn it on
and restore the PWM ctrl register value it saved from its PS3 handler.
Note not only does it restore it, it ors it with 0xC0000000 turning it
on at a time where we may not want it to get turned on at all.

The pwm_get call which the i915 driver does to get a reference to the
PWM controller, already adds a device-link making the GFX0 device a
consumer of the PWM device. So it should already have been resumed when
the above AML runs and the AML should thus not do its undesirable poking
of the PWM controller register.

But the PCI core powers on PCI devices in the no-irq resume phase and
thus calls the troublesome PS0 method in the no-irq resume phase.
Where as LPSS devices by default are resumed in the early resume phase.

This commit sets the resume_from_noirq flag in the bsw_pwm_dev_desc
struct, so that Cherry Trail PWM controllers will be resumed in the
no-irq phase. Together with the device-link added by the pwm-get this
ensures that the PWM controller will be on when the troublesome PS0
method runs, which stops it from poking the PWM controller.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200903112337.4113-2-hdegoede@redhat.com
2020-09-06 15:37:57 +02:00
..
acpica ACPICA: iASL: add new OperationRegion subtype keyword PlatformRtMechanism 2020-06-05 13:34:23 +02:00
apei ACPI updates for 5.8-rc1 2020-06-02 13:25:52 -07:00
arm64 ACPI/IORT: Remove the unused __get_pci_rid() 2020-05-26 20:43:33 +01:00
dptf ACPI: DPTF: Add battery participant for TigerLake 2020-06-29 14:00:57 +02:00
nfit libnvdimm for 5.8 2020-06-13 13:04:36 -07:00
numa virtio-mem: Allow to specify an ACPI PXM as nid 2020-06-04 15:36:52 -04:00
pmic ACPI / PMIC: Add i2c address for thermal control 2020-05-18 12:57:24 +02:00
x86 ACPI: Convert to new X86 CPU match macros 2020-03-24 21:30:50 +01:00
ac.c ACPI / AC: Cleanup DMI quirk table 2020-03-04 10:32:50 +01:00
acpi_adxl.c ACPI/ADXL: Add address translation interface using an ACPI DSM 2018-10-16 10:03:00 +02:00
acpi_amba.c Merge 5.2-rc6 into char-misc-next 2019-06-23 09:23:33 +02:00
acpi_apd.c ACPI / APD: Add clock frequency for Hisilicon Hip08-Lite I2C controller 2020-02-03 12:03:18 +01:00
acpi_cmos_rtc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
acpi_configfs.c ACPI: configfs: Disallow loading ACPI tables when locked down 2020-06-22 16:41:27 +02:00
acpi_dbg.c ACPI: debug: Make two functions static 2020-05-09 11:33:07 +02:00
acpi_extlog.c EDAC: Drop the EDAC report status checks 2020-04-14 16:01:01 +02:00
acpi_ipmi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
acpi_lpat.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
acpi_lpit.c ACPI: LPIT: Put the low power idle table after using it 2020-05-09 11:29:16 +02:00
acpi_lpss.c ACPI / LPSS: Resume Cherry Trail PWM controller in no-irq phase 2020-09-06 15:37:57 +02:00
acpi_memhotplug.c mm/memory_hotplug: rename walk_memory_range() and pass start+size instead of pfns 2019-07-18 17:08:06 -07:00
acpi_pad.c ACPI, x86: Add Zhaoxin processors support for NONSTOP TSC 2019-06-22 11:45:57 +02:00
acpi_platform.c ACPI: platform: Unregister stale platform devices 2019-10-17 23:48:39 +02:00
acpi_pnp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
acpi_processor.c ACPI: processor: Export acpi_processor_evaluate_cst() 2019-12-27 11:02:07 +01:00
acpi_tad.c PM: sleep: core: Rename DPM_FLAG_LEAVE_SUSPENDED 2020-04-24 21:34:22 +02:00
acpi_video.c ACPI: video: remove redundant assignments to variable result 2020-03-04 10:43:04 +01:00
acpi_watchdog.c ACPI: watchdog: Put the watchdog action table after parsing 2020-05-09 11:29:17 +02:00
battery.c ACPI / battery: Cleanup Lenovo Ideapad Miix 320 DMI table entry 2020-03-04 10:32:50 +01:00
bgrt.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
blacklist.c ACPI: blacklist: fix clang warning for unused DMI table 2019-07-11 22:45:00 +02:00
bus.c ACPI: bus: Fix NULL pointer check in acpi_bus_get_private_data() 2019-11-29 11:42:10 +01:00
button.c ACPI: Delete unused proc filename macros 2020-05-14 13:49:33 +02:00
cm_sbs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
container.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
cppc_acpi.c ACPI: CPPC: Fix reference count leak in acpi_cppc_processor_probe() 2020-05-28 13:47:53 +02:00
custom_method.c Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
debugfs.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
device_pm.c Merge branches 'pm-cpufreq' and 'pm-acpi' 2020-06-10 17:10:40 +02:00
device_sysfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
dock.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
ec_sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 2019-06-19 17:09:52 +02:00
ec.c ACPI updates for 5.8-rc1 2020-06-02 13:25:52 -07:00
event.c ACPI: event: replace strcpy() by strscpy() 2019-04-23 10:54:26 +02:00
evged.c ACPI: GED: use correct trigger type field in _Exx / _Lxx handling 2020-05-27 17:51:49 +02:00
fan.c ACPI: fan: Fix Tiger Lake ACPI device ID 2020-06-30 19:32:45 +02:00
glue.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
hed.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
internal.h ACPI: EC: PM: Avoid premature returns from acpi_s2idle_wake() 2020-05-11 10:11:38 +02:00
ioapic.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
irq.c Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-07-08 11:01:13 -07:00
Kconfig ACPI: Add new tiny-power-button driver to directly signal init 2020-02-13 23:36:23 +01:00
Makefile ACPI: Add new tiny-power-button driver to directly signal init 2020-02-13 23:36:23 +01:00
nvs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
osi.c ACPI: OSI: Shoot duplicate word 2019-11-13 11:12:08 +01:00
osl.c ACPI: OSL: Add missing __acquires/__releases annotations 2020-03-04 10:40:48 +01:00
pci_irq.c ACPI / PCI: fix acpi_pci_irq_enable() memory leak 2019-09-03 09:41:25 +02:00
pci_link.c ACPI: Delete unused proc filename macros 2020-05-14 13:49:33 +02:00
pci_mcfg.c PCI: Constify struct pci_ecam_ops 2020-05-01 16:28:59 +01:00
pci_root.c Merge branch 'pci/misc' 2020-06-04 12:59:11 -05:00
pci_slot.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 491 2019-06-19 17:09:52 +02:00
power.c ACPI: Delete unused proc filename macros 2020-05-14 13:49:33 +02:00
pptt.c ACPI: PPTT: Consistently use unsigned int as parameter type 2020-01-07 11:46:36 +01:00
proc.c ACPI: list_for_each_safe() -> list_for_each_entry_safe() 2020-03-04 10:48:00 +01:00
processor_core.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
processor_driver.c cpufreq: Use per-policy frequency QoS 2019-10-21 02:05:21 +02:00
processor_idle.c ACPI: processor: idle: Allow probing on platforms with one ACPI C-state 2020-04-27 10:32:44 +02:00
processor_pdc.c
processor_perflib.c ACPI: processor: Add QoS requests for all CPUs 2019-10-25 11:33:48 +02:00
processor_thermal.c ACPI: processor: Add QoS requests for all CPUs 2019-10-25 11:33:48 +02:00
processor_throttling.c x86: ACPI: fix CPU hotplug deadlock 2020-04-04 16:28:24 +02:00
property.c device property: Add a function to obtain a node's prefix 2019-10-11 11:26:55 +02:00
reboot.c ACPI: Allow CONFIG_PCI to be unset for reboot 2018-12-20 10:19:49 +01:00
resource.c acpi: Use pr_warn instead of pr_warning 2019-10-18 15:00:19 +02:00
sbs.c ACPI: Delete unused proc filename macros 2020-05-14 13:49:33 +02:00
sbshc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372 2019-06-05 17:37:10 +02:00
sbshc.h ACPI: SBS: remove unused const variable 'SMBUS_PEC' 2019-08-23 12:55:09 +02:00
scan.c More power management updates for 5.8-rc1 2020-06-10 14:04:39 -07:00
sleep.c ACPI updates for 5.8-rc1 2020-06-02 13:25:52 -07:00
sleep.h ACPI: PM: Add acpi_[un]register_wakeup_handler() 2020-04-04 19:45:18 +02:00
spcr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sysfs.c ACPI: sysfs: Fix pm_profile_attr type 2020-06-22 17:13:38 +02:00
tables.c ACPICA: Add NHLT table signature 2020-03-30 14:52:33 +02:00
thermal.c ACPI: thermal: switch to use <linux/units.h> helpers 2020-01-31 10:30:39 -08:00
tiny-power-button.c ACPI: Add new tiny-power-button driver to directly signal init 2020-02-13 23:36:23 +01:00
utils.c ACPI: utils: Add acpi_evaluate_reg() helper 2020-05-09 11:40:25 +02:00
video_detect.c ACPI: video: Use native backlight on Acer TravelMate 5735Z 2020-05-25 11:58:51 +02:00
wakeup.c ACPI: PM: Add acpi_[un]register_wakeup_handler() 2020-04-04 19:45:18 +02:00