Linus Torvalds
ea45ea70b6
ACPI video support fixes for 3.11 ...
- Change from Aaron Lu makes ACPICA export a variable which can be
used by driver code to determine whether or not the BIOS believes
that we are compatible with Windows 8.
- Change from Matthew Garrett makes the ACPI video driver initialize
the ACPI backlight even if it is not going to be used afterward
(that is needed for backlight control to work on Thinkpads).
- Fix from Rafael J Wysocki implements Windows 8 backlight support
workaround making i915 take over bakclight control if the firmware
thinks it's dealing with Windows 8. Based on the work of multiple
developers including Matthew Garrett, Chun-Yi Lee, Seth Forshee,
and Aaron Lu.
- Fix from Aaron Lu makes the kernel follow Windows 8 by informing
the firmware through the _DOS method that it should not carry out
automatic brightness changes, so that brightness can be controlled
by GUI.
/
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Merge tag 'acpi-video-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI video support fixes from Rafael Wysocki:
"I'm sending a separate pull request for this as it may be somewhat
controversial. The breakage addressed here is not really new and the
fixes may not satisfy all users of the affected systems, but we've had
so much back and forth dance in this area over the last several weeks
that I think it's time to actually make some progress.
The source of the problem is that about a year ago we started to tell
BIOSes that we're compatible with Windows 8, which we really need to
do, because some systems shipping with Windows 8 are tested with it
and nothing else, so if we tell their BIOSes that we aren't compatible
with Windows 8, we expose our users to untested BIOS/AML code paths.
However, as it turns out, some Windows 8-specific AML code paths are
not tested either, because Windows 8 actually doesn't use the ACPI
methods containing them, so if we declare Windows 8 compatibility and
attempt to use those ACPI methods, things break. That occurs mostly
in the backlight support area where in particular the _BCM and _BQC
methods are plain unusable on some systems if the OS declares Windows
8 compatibility.
[ The additional twist is that they actually become usable if the OS
says it is not compatible with Windows 8, but that may cause
problems to show up elsewhere ]
Investigation carried out by Matthew Garrett indicates that what
Windows 8 does about backlight is to leave backlight control up to
individual graphics drivers. At least there's evidence that it does
that if the Intel graphics driver is used, so we've decided to follow
Windows 8 in that respect and allow i915 to control backlight (Daniel
likes that part).
The first commit from Aaron Lu makes ACPICA export the variable from
which we can infer whether or not the BIOS believes that we are
compatible with Windows 8.
The second commit from Matthew Garrett prepares the ACPI video driver
by making it initialize the ACPI backlight even if it is not going to
be used afterward (that is needed for backlight control to work on
Thinkpads).
The third commit implements the actual workaround making i915 take
over backlight control if the firmware thinks it's dealing with
Windows 8 and is based on the work of multiple developers, including
Matthew Garrett, Chun-Yi Lee, Seth Forshee, and Aaron Lu.
The final commit from Aaron Lu makes us follow Windows 8 by informing
the firmware through the _DOS method that it should not carry out
automatic brightness changes, so that brightness can be controlled by
GUI.
Hopefully, this approach will allow us to avoid using blacklists of
systems that should not declare Windows 8 compatibility just to avoid
backlight control problems in the future.
- Change from Aaron Lu makes ACPICA export a variable which can be
used by driver code to determine whether or not the BIOS believes
that we are compatible with Windows 8.
- Change from Matthew Garrett makes the ACPI video driver initialize
the ACPI backlight even if it is not going to be used afterward
(that is needed for backlight control to work on Thinkpads).
- Fix from Rafael J Wysocki implements Windows 8 backlight support
workaround making i915 take over bakclight control if the firmware
thinks it's dealing with Windows 8. Based on the work of multiple
developers including Matthew Garrett, Chun-Yi Lee, Seth Forshee,
and Aaron Lu.
- Fix from Aaron Lu makes the kernel follow Windows 8 by informing
the firmware through the _DOS method that it should not carry out
automatic brightness changes, so that brightness can be controlled
by GUI"
* tag 'acpi-video-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / video: no automatic brightness changes by win8-compatible firmware
ACPI / video / i915: No ACPI backlight if firmware expects Windows 8
ACPI / video: Always call acpi_video_init_brightness() on init
ACPICA: expose OSI version
2013-07-21 10:11:04 -07:00
dmaengine: PL08x: Avoid collisions with get_signal() macro
2013-07-05 11:40:47 +05:30
bcma: add support for BCM43142
2013-06-27 13:42:16 -04:00
ARM: imx: flexcan: Remove platform file
2013-06-27 15:15:32 +02:00
libceph: fix invalid unsigned->signed conversion for timespec encoding
2013-07-09 12:18:06 -07:00
The common clock framework changes for 3.11 include new clock drivers
2013-07-03 11:54:50 -07:00
lib: add support for LZ4-compressed kernel
2013-07-09 10:33:30 -07:00
iio: Fix iio_channel_has_info
2013-07-02 22:08:20 +01:00
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
MMC highlights for 3.11:
2013-07-10 11:16:00 -07:00
net/mlx4_core: Add HW enforcement to VF link state
2013-07-01 13:10:57 -07:00
mlx5_core: Adjust hca_cap.uar_page_sz to conform to Connect-IB spec
2013-07-11 16:45:08 -07:00
mmc: esdhc: Fix bug when writing to SDHCI_HOST_CONTROL register
2013-07-05 12:48:35 -04:00
pinctrl: set unit for debounce time pinconfig to usec
2013-06-25 15:34:44 +02:00
Trivial remoteproc fixes by Suman Anna, Wei Yongjun and Thomas Meyer.
2013-07-11 12:35:09 -07:00
Merge remote-tracking branch 'regulator/topic/linar' into regulator-next
2013-07-01 11:17:08 +01:00
Merge remote-tracking branch 'spi/topic/xilinx' into spi-next
2013-06-26 16:21:06 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-07-14 11:42:26 -07:00
ARM SoC specific changes
2013-07-02 13:43:38 -07:00
ACPI / video / i915: No ACPI backlight if firmware expects Windows 8
2013-07-18 02:08:06 +02:00
PCI changes for the v3.11 merge window:
2013-07-03 16:31:35 -07:00
drivers/dma: remove unused support for MEMSET operations
2013-07-03 16:07:42 -07:00
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
backlight: add devm_backlight_device_{register,unregister}()
2013-07-03 16:07:43 -07:00
xtensa: remove the second argument of __bio_kmap_atomic()
2013-07-08 01:23:15 -07:00
mm: kill free_all_bootmem_node()
2013-07-03 16:07:39 -07:00
mm: vmscan: take page buffers dirty and locked state into account
2013-07-03 16:07:29 -07:00
Merge branch 'for-3.11/core' of git://git.kernel.dk/linux-block
2013-07-11 13:03:24 -07:00
clocksource: Reselect clocksource when watchdog validated high-res capability
2013-07-05 11:09:28 +02:00
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
thermal: cpu_cooling: fix stub function
2013-07-08 10:13:40 -04:00
cpufreq: Fix serialization of frequency transitions
2013-07-04 13:12:44 +02:00
vfs: constify dentry parameter in d_count()
2013-07-20 05:06:27 +04:00
dm: optimize use SRCU and RCU
2013-07-10 23:41:18 +01:00
driver core: add default groups to struct class
2013-07-16 10:57:37 -07:00
drivers/dma: remove unused support for MEMSET operations
2013-07-03 16:07:42 -07:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-06 14:09:38 -07:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-06 14:09:38 -07:00
elevator: Fix a race in elevator switching
2013-07-03 13:25:24 +02:00
err.h: IS_ERR() can accept __user pointers
2013-07-03 16:07:41 -07:00
fb: make fp_get_options name argument const
2013-06-27 16:53:30 +08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2013-07-14 11:42:26 -07:00
Replace a bunch of file->dentry->d_inode refs with file_inode()
2013-06-29 12:57:13 +04:00
include/linux/gfp.h: fix the comment for GFP_ZONE_TABLE
2013-07-09 10:33:21 -07:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2013-07-04 10:29:23 -07:00
mm/hugetlb: remove hugetlb_prefault
2013-07-03 16:07:32 -07:00
macvtap: Let TUNSETOFFLOAD actually controll offload features.
2013-06-25 16:44:56 -07:00
vlan: mask vlan prio bits
2013-07-18 13:05:23 -07:00
init.h: remove __cpuinit sections from the kernel
2013-06-26 12:13:18 -04:00
genirq: Add irq_get_trigger_type() to get IRQ flags
2013-06-25 11:48:24 +02:00
jbd2: invalidate handle if jbd2_journal_restart() fails
2013-07-01 08:12:41 -04:00
net: convert lls to use time_in_range()
2013-07-02 15:53:53 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
KVM fixes for 3.11
2013-07-03 13:21:40 -07:00
lcd: add devm_lcd_device_{register,unregister}()
2013-07-03 16:07:43 -07:00
linked-list: Remove __list_for_each
2013-07-16 22:00:14 -07:00
llist: llist_add() can use llist_add_batch()
2013-07-13 13:29:32 +04:00
lib: add lz4 compressor module
2013-07-09 10:33:30 -07:00
mm, memcg: don't take task_lock in task_in_mem_cgroup
2013-07-03 16:07:26 -07:00
mm: remove unused VM_<READfoo> macros and expand other in-place
2013-07-09 10:33:23 -07:00
mm: remove free_area_cache
2013-07-10 18:11:34 -07:00
mm: tune vm_committed_as percpu_counter batching size
2013-07-03 16:07:32 -07:00
mm: remove unused functions is_{normal_idx, normal, dma32, dma}
2013-07-09 10:33:22 -07:00
rapidio: add udev notification
2013-07-03 16:08:05 -07:00
There is no /sys/parameters
2013-07-02 15:38:19 +09:30
mutex: Add support for wound/wait style locks
2013-06-26 12:10:56 +02:00
mutex: Move ww_mutex definitions to ww_mutex.h
2013-07-12 12:07:46 +02:00
nbd: correct disconnect behavior
2013-07-03 16:08:05 -07:00
net: rename ll methods to busy-poll
2013-07-10 17:08:27 -07:00
netlink: fix splat in skb_clone with large messages
2013-06-27 22:44:16 -07:00
NFS: Make nfs_attribute_cache_expired() non-static
2013-07-09 17:17:07 -04:00
Merge branch 'labeled-nfs' into linux-next
2013-06-28 16:29:51 -04:00
mm/pageblock: remove get/set_pageblock_flags
2013-07-03 16:07:32 -07:00
mm: remove lru parameter from __pagevec_lru_add and remove parts of pagevec API
2013-07-03 16:07:31 -07:00
pci: add pcibios_release_device
2013-06-26 21:10:05 +02:00
Merge branch 'pci/misc' into next
2013-06-26 15:55:52 -06:00
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
kernel/fork.c:copy_process(): don't add the uninitialized child to thread/task/pid lists
2013-07-03 16:08:03 -07:00
Device tree updates for v3.11
2013-07-04 15:51:45 -07:00
PM / Sleep: Fix comment typo in pm_wakeup.h
2013-07-15 01:31:37 +02:00
posix_cpu_timer: consolidate expiry time type
2013-07-03 16:16:20 +02:00
power_supply: Move of_node out of the #ifdef CONFIG_OF
2013-06-28 18:20:52 -07:00
pstore: Pass header size in the pstore write callback
2013-07-01 18:10:48 +10:00
ptrace: revert "Prepare to fix racy accesses on task breakpoints"
2013-07-09 10:33:26 -07:00
timekeeping: Indicate that clock was set in the pvclock gtod notifier
2013-06-28 23:15:06 +02:00
reboot: move arch/x86 reboot= handling to generic kernel
2013-07-09 10:33:29 -07:00
Merge remote-tracking branch 'regmap/topic/field' into regmap-next
2013-06-30 12:40:03 +01:00
mutex: Move ww_mutex definitions to ww_mutex.h
2013-07-12 12:07:46 +02:00
rapidio: change endpoint device name format
2013-07-03 16:08:05 -07:00
rapidio: add udev notification
2013-07-03 16:08:05 -07:00
lib/scatterlist: introduce sg_pcopy_from_buffer() and sg_pcopy_to_buffer()
2013-07-09 10:33:30 -07:00
mm: remove free_area_cache
2013-07-10 18:11:34 -07:00
NFS client updates for Linux 3.11
2013-07-09 12:09:43 -07:00
ipc/sem.c: replace shared sem_otime with per-semaphore value
2013-07-09 10:33:28 -07:00
seq_file: add seq_list_*_percpu helpers
2013-07-08 13:36:41 +04:00
DMA: shdma: shdma_chan_filter() has to be in shdma-base.h
2013-07-05 11:40:59 +05:30
DMA: shdma: add DT support
2013-07-05 11:41:00 +05:30
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-07-03 14:55:13 -07:00
slab: add kmalloc() to kernel API documentation
2013-07-07 19:02:59 +03:00
slab: add kmalloc() to kernel API documentation
2013-07-07 19:02:59 +03:00
include/linux/smp.h:on_each_cpu(): switch back to a macro
2013-07-03 16:07:22 -07:00
dt:net:stmmac: Add dt specific phy reset callback support.
2013-07-04 14:34:17 -07:00
swap: discard while swapping only if SWAP_FLAG_DISCARD_PAGES
2013-07-03 16:07:32 -07:00
sysfs: use file mode defines from stat.h
2013-07-16 10:57:37 -07:00
reboot: arm: change reboot_mode to use enum reboot_mode
2013-07-09 10:33:29 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
virtio: include asm/barrier explicitly
2013-07-09 10:47:53 +09:30
mm/vmalloc.c: rename VM_UNLIST to VM_UNINITIALIZED
2013-07-09 10:33:21 -07:00
FS-Cache patches 2013-07-02
2013-07-02 09:52:47 -07:00
drivers: avoid format strings in names passed to alloc_workqueue()
2013-07-03 16:07:41 -07:00
mm/writeback: commit reason of WB_REASON_FORKER_THREAD mismatch name
2013-07-09 10:33:22 -07:00
mutex: Move ww_mutex definitions to ww_mutex.h
2013-07-12 12:07:46 +02:00
zbud: add to mm/
2013-07-10 18:11:34 -07:00
