linux-toradex.git/drivers/acpi, branch v3.17.4

ACPI / EC: Fix regression due to conflicting firmware behavior between Samsung and Acer.

2014-11-14T18:10:32+00:00

commit 79149001105f18bd2285ada109f9229ea24a7571 upstream.

It is reported that Samsung laptops that need to poll events are broken by
the following commit:
 Commit 3afcf2ece453e1a8c2c6de19cdf06da3772a1b08
 Subject: ACPI / EC: Add support to disallow QR_EC to be issued when SCI_EVT isn't set

The behaviors of the 2 vendor firmwares are conflict:
 1. Acer: OSPM shouldn't issue QR_EC unless SCI_EVT is set, firmware
         automatically sets SCI_EVT as long as there is event queued up.
 2. Samsung: OSPM should issue QR_EC whatever SCI_EVT is set, firmware
            returns 0 when there is no event queued up.

This patch is a quick fix to distinguish the behaviors to make Acer
behavior only effective for Acer EC firmware so that the breakages on
Samsung EC firmware can be avoided.

Fixes: 3afcf2ece453 (ACPI / EC: Add support to disallow QR_EC to be issued ...)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=44161
Reported-and-tested-by: Ortwin Glück 
Signed-off-by: Lv Zheng 
[ rjw : Subject ]
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

ACPI: invoke acpi_device_wakeup() with correct parameters

2014-11-14T18:10:32+00:00

commit 67598a1d3140a66f57aa6bcb8d22c4c2b7e910f5 upstream.

Fix a bug that invokes acpi_device_wakeup() with wrong parameters.

Fixes: f35cec255557 (ACPI / PM: Always enable wakeup GPEs when enabling device wakeup)
Signed-off-by: Zhang Rui 
Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

Merge branches 'acpi-hotplug', 'acpi-scan', 'acpi-lpss', 'acpi-gpio' and 'acpi-video'

2014-09-25T20:59:30+00:00

* acpi-hotplug:
  ACPI / hotplug: Generate online uevents for ACPI containers

* acpi-scan:
  ACPI / scan: Correct error return value of create_modalias()

* acpi-lpss:
  ACPI / platform / LPSS: disable async suspend/resume of LPSS devices

* acpi-gpio:
  gpio / ACPI: Use pin index and bit length
  ACPICA: Update to GPIO region handler interface.

* acpi-video:
  ACPI / video: disable native backlight for ThinkPad X201s

ACPICA: Update to GPIO region handler interface.

2014-09-24T20:53:46+00:00

Changes to correct several GPIO issues:

1) The update_rule in a GPIO field definition is now ignored;
a read-modify-write operation is never performed for GPIO fields.
(Internally, this means that the field assembly/disassembly
code is completely bypassed for GPIO.)

2) The Address parameter passed to a GPIO region handler is
now the bit offset of the field from a previous Connection()
operator. Thus, it becomes a "Pin Number Index" into the
Connection() resource descriptor.

3) The bit_width parameter passed to a GPIO region handler is
now the exact bit width of the GPIO field. Thus, it can be
interpreted as "number of pins".

Overall, we can now say that the region handler interface
to GPIO handlers is a raw "bit/pin" addressed interface, not
a byte-addressed interface like the system_memory handler interface.

Signed-off-by: Bob Moore 
Signed-off-by: Lv Zheng 
Cc: 3.15+  # 3.15+
Signed-off-by: Rafael J. Wysocki

ACPI / platform / LPSS: disable async suspend/resume of LPSS devices

2014-09-24T20:42:26+00:00

On some systems (Asus T100 in particular) there are strict ordering
dependencies between LPSS devices with respect to power management
that break if they suspend/resume asynchronously.

In theory it should be possible to follow those dependencies in the
async suspend/resume case too (the ACPI tables tell as that the
dependencies are there), but since we're missing infrastructure
for that at the moment, disable async suspend/resume for all of
the LPSS devices for the time being.

Link: http://marc.info/?l=linux-acpi&m=141158962321905&w=2
Fixes: 8ce62f85a81f (ACPI / platform / LPSS: Enable async suspend/resume of LPSS devices)
Signed-off-by: Li Aubrey 
Signed-off-by: Fu Zhonghui 
Cc: 3.16+  # 3.16+
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki

ACPI / scan: Correct error return value of create_modalias()

2014-09-22T12:11:43+00:00

There is a typo, it should be negative -errno instead.

Signed-off-by: Mika Westerberg 
Cc: All applicable 
Signed-off-by: Rafael J. Wysocki

ACPI / video: disable native backlight for ThinkPad X201s

2014-09-22T12:06:01+00:00

The ThinkPad X201s has a working ACPI video backlight interface and is
shipped before Win8; then there is BIOS update that starts to query
_OSI("Windows 2012") and that would make our video module stop creating
backlight interface and caused problem for the user. Add it to the DMI
table to disable native backlight to fix this problem.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=81691
Link: https://bugzilla.kernel.org/show_bug.cgi?id=51231
Cc: 3.16+  # 3.16+
Reported-and-tested-by: Yves-Alexis Perez 
Signed-off-by: Aaron Lu 
Signed-off-by: Rafael J. Wysocki

ACPI / hotplug: Generate online uevents for ACPI containers

2014-09-21T00:58:18+00:00

Commit 46394fd01 (ACPI / hotplug: Move container-specific code out of
the core) removed the generation of "online" uevents for containers,
because "add" uevents are now generated for them automatically when
container system devices are registered.  However, there are user
space tools that need to be notified when the container and all of
its children have been enumerated, which doesn't happen any more.

For this reason, add a mechanism allowing "online" uevents to be
generated for ACPI containers after enumerating the container along
with all of its children.

Fixes: 46394fd01 (ACPI / hotplug: Move container-specific code out of the core)
Reported-and-tested-by: Yasuaki Ishimatsu 
Cc: 3.14+  # 3.14+
Signed-off-by: Rafael J. Wysocki

Merge tag 'pci-v3.17-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

2014-09-19T17:50:30+00:00

Pull PCI fixes from Bjorn Helgaas:
 "These fix:

   - Boot video device detection on dual-GPU Apple systems
   - Hotplug fiascos on VGA switcheroo with radeon & nouveau drivers
   - Boot hang on Freescale i.MX6 systems
   - Excessive "no hotplug settings from platform" warnings

  In particular:

  Enumeration
    - Don't default exclusively to first video device (Bruno Prémont)

  PCI device hotplug
    - Remove "no hotplug settings from platform" warning (Bjorn Helgaas)
    - Add pci_ignore_hotplug() for VGA switcheroo (Bjorn Helgaas)

  Freescale i.MX6
    - Put LTSSM in "Detect" state before disabling (Lucas Stach)"

* tag 'pci-v3.17-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  vgaarb: Drop obsolete #ifndef
  vgaarb: Don't default exclusively to first video device with mem+io
  ACPIPHP / radeon / nouveau: Remove acpi_bus_no_hotplug()
  PCI: Remove "no hotplug settings from platform" warning
  PCI: Add pci_ignore_hotplug() to ignore hotplug events for a device
  PCI: imx6: Put LTSSM in "Detect" state before disabling it
  MAINTAINERS: Add Lucas Stach as co-maintainer for i.MX6 PCI driver

ACPIPHP / radeon / nouveau: Remove acpi_bus_no_hotplug()

2014-09-15T19:15:34+00:00

Revert parts of f244d8b623da ("ACPIPHP / radeon / nouveau: Fix VGA
switcheroo problem related to hotplug").

A previous commit 5493b31f0b55 ("PCI: Add pci_ignore_hotplug() to ignore
hotplug events for a device") added equivalent functionality implemented in
a different way for both acpiphp and pciehp.

Signed-off-by: Bjorn Helgaas 
Acked-by: Alex Deucher 
Acked-by: Rafael J. Wysocki 
Acked-by: Dave Airlie 
Acked-by: Rajat Jain