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9a417ec0c9
linux/drivers
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Andy Lutomirski 9a417ec0c9 thinkpad-acpi: Try to use full software mute control 
ThinkPads have hardware volume controls and three buttons to control
them.  (These are separate from the standard mixer.)  By default,
the buttons are:

 - Mute: Mutes the hardware volume control and, on some models,
   generates KEY_MUTE.

 - Up: Unmutes, generates KEY_VOLUMEUP, and increases volume if
   applicable.  (Newer thinkpads only have hardware mute/unmute.)

 - Down: Unmutes, generates KEY_VOLUMEDOWN, and decreases volume
   if applicable.

This behavior is unfortunate, since modern userspace will also
handle the hotkeys and change the other mixer.  If the software
mixer is muted and the hardware mixer is unmuted and you push mute,
hilarity ensues as they both switch state.

Rather than adding a lot of complex ALSA integration to fix this,
just disable the special ThinkPad volume controls when possible.
This turns the mute and volume buttons into regular buttons, and
standard software controls will work as expected.

ALSA already knows about the mute light on models with a mute light,
so everything should just work.

This should also allow us to remove _OSI(Linux) for all ThinkPads.

For future reference: It turns out that we can ask ACPI for one of
three behaviors directly on very new models.  They are "latch" (the
default), "none" (no automatic control), and "toggle" (mute unmutes
when muted).  All of the modes besides "none" seem to be a bit
buggy, though, and there doesn't seem to be a consistent way to get
any notification when the HW mute state is changed.

Signed-off-by: Andy Lutomirski <luto@mit.edu>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2014-12-04 04:03:22 -08:00
..
accessibility
acpi Merge branch 'acpi-blacklist' 2014-11-14 15:17:17 +01:00
amba PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h 2014-09-30 01:16:44 +02:00
ata ahci: fix AHCI parameters not taken into account 2014-11-04 12:56:25 -05:00
atm atm: simplify lanai.c by using module_pci_driver 2014-10-17 11:55:32 -04:00
auxdisplay
base Merge branches 'pm-domains', 'pm-sleep' and 'pm-cpufreq' 2014-11-14 15:17:32 +01:00
bcma bcma: add another PCI ID of device with BCM43228 2014-10-23 14:02:06 -04:00
block zram: avoid kunmap_atomic() of a NULL pointer 2014-11-13 16:17:05 -08:00
bluetooth Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-10-13 11:28:42 +02:00
bus ARM: SoC driver updates for 3.18 2014-10-08 17:37:16 -04:00
cdrom
char virtio: bugfix for 3.18 2014-11-13 18:07:52 -08:00
clk The clk tree changes for 3.18 are dominated by clock drivers. Mostly 2014-10-15 07:05:03 +02:00
clocksource ARM/ARM64: arch-timer: fix arch_timer_probed logic 2014-10-26 20:50:00 +01:00
connector
cpufreq cpufreq: Avoid crash in resume on SMP without OPP 2014-11-08 02:10:04 +01:00
cpuidle Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-10-24 12:48:47 -07:00
crypto crypto: caam - fix missing dma unmap on error path 2014-11-06 23:10:20 +08:00
dca
devfreq PM / devfreq: exynos: Enable building exynos PPMU as module 2014-09-29 20:22:36 +09:00
dio
dma dma: edma: move device registration to platform code 2014-11-05 18:26:10 -08:00
dma-buf dma-buf: don't open-code atomic_long_read() 2014-10-09 02:39:07 -04:00
edac e7xxx_edac: Report CE events properly 2014-10-22 22:59:00 +02:00
eisa
extcon
firewire firewire: cdev: prevent kernel stack leaking into ioctl arguments 2014-11-14 12:10:13 +01:00
firmware Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-23 14:45:09 -07:00
fmc
gpio This is the bulk of GPIO changes for the v3.18 development 2014-10-09 14:58:15 -04:00
gpu drm/tegra: Fixes for v3.18-rc5 2014-11-14 07:03:02 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-11-13 16:19:14 -08:00
hsi
hv
hwmon hwmon: (fam15h_power) Fix NB device ID for F16h M30h 2014-11-11 10:39:45 -08:00
hwspinlock
i2c i2c: core: Dispose OF IRQ mapping at client removal time 2014-11-07 19:03:18 +01:00
ide Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block 2014-10-18 12:12:45 -07:00
idle
iio iio: as3935: allocate correct iio_device size 2014-11-05 18:33:46 +00:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-10-31 15:04:58 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-11-14 14:31:54 -08:00
iommu IOMMU Updates for Linux v3.18 2014-10-15 07:23:49 +02:00
ipack
irqchip irqchip: armada-370-xp: Fix MPIC interrupt handling 2014-11-02 01:31:10 +00:00
isdn isdn/gigaset: fix usb_gigaset write_cmd result race 2014-10-14 15:05:35 -04:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-10-21 08:18:38 -07:00
lguest
macintosh
mailbox Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2014-10-21 11:21:19 -07:00
mcb
md One fix for md for 3.18. 2014-11-16 15:34:31 -08:00
media [media] sp2: sp2_init() can be static 2014-11-03 19:08:06 -02:00
memory
memstick memstick: r592: fix build warnings for !PM_SLEEP 2014-10-14 02:18:22 +02:00
message SCSI for-linus on 20141007 2014-10-07 21:29:18 -04:00
mfd mfd: twl4030-power: Fix poweroff with PM configuration enabled 2014-11-10 15:22:04 +00:00
misc cxl: Fix PSL error due to duplicate segment table entries 2014-10-28 19:52:52 +11:00
mmc mmc: core: fix card detection regression 2014-11-05 09:28:48 +01:00
mtd Three main MTD fixes for 3.18: 2014-11-02 14:45:52 -08:00
net vxlan: Do not reuse sockets for a different address family 2014-11-13 15:19:59 -05:00
nfc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-10-07 14:48:29 -04:00
ntb ntb: Adding split BAR support for Haswell platforms 2014-10-17 07:08:51 -04:00
nubus
of of: Fix overflow bug in string property parsing functions 2014-11-04 10:19:48 +00:00
oprofile
parisc Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-13 16:23:15 +02:00
parport
pci PCI updates for v3.18: 2014-10-31 18:48:29 -07:00
pcmcia
phy phy: omap-usb2: Enable runtime PM of omap-usb2 phy properly 2014-11-05 14:34:06 -08:00
pinctrl pinctrl: baytrail: show output gpio state correctly on Intel Baytrail 2014-10-28 11:16:26 +01:00
platform thinkpad-acpi: Try to use full software mute control 2014-12-04 04:03:22 -08:00
pnp PNP: replace strnicmp with strncasecmp 2014-10-14 02:18:25 +02:00
power power supply and reset changes for the v3.18-rc 2014-11-15 15:22:51 -08:00
powercap
pps
ps3
ptp
pwm pwm: Changes for v3.18-rc1 2014-10-21 08:17:43 -07:00
rapidio
ras
regulator Merge remote-tracking branches 'regulator/fix/max1586', 'regulator/fix/max77686', 'regulator/fix/max77693', 'regulator/fix/max77802', 'regulator/fix/max8860' and 'regulator/fix/s2mpa01' into regulator-linus 2014-11-05 14:59:25 +00:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-bq32k.c: fix register value 2014-10-29 16:33:14 -07:00
s390 KVM: s390: virtio_ccw: remove unused variable 2014-11-03 10:43:00 +01:00
sbus
scsi bnx2fc: fix tgt spinlock locking 2014-11-10 15:25:41 +01:00
sfi
sh
sn
soc soc: versatile: Add terminating entry for realview_soc_of_match 2014-10-28 22:05:07 +01:00
spi Merge remote-tracking branches 'spi/fix/fsl-dspi' and 'spi/fix/pxa2xx' into spi-linus 2014-11-06 12:58:46 +00:00
spmi
ssb This is the bulk of GPIO changes for the v3.18 development 2014-10-09 14:58:15 -04:00
staging Second round of IIO fixes for the 3.18 cycle. 2014-11-05 11:30:45 -08:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-10-21 13:06:38 -07:00
tc
thermal imx: thermal: imx_get_temp might be called before sensor clock is prepared 2014-11-09 15:42:53 -04:00
thunderbolt
tty tty: Fix pty master poll() after slave closes v2 2014-11-06 12:23:36 -08:00
uio uio: Export definition of struct uio_device 2014-10-02 21:35:54 -07:00
usb USB: cdc-acm: add quirk for control-line state requests 2014-11-06 12:25:40 -08:00
uwb
vfio IOMMU Updates for Linux v3.18 2014-10-15 07:23:49 +02:00
vhost
video Merge branch '3.18/omapdss-fixes' into 3.18/fbdev-fixes 2014-10-30 14:53:49 +02:00
virt
virtio One cc: stable commit, the rest are a series of minor cleanups which have 2014-10-18 10:25:09 -07:00
vlynq
vme
w1
watchdog watchdog: meson: remove magic value for reboot 2014-10-20 21:09:17 +02:00
xen xen/pci: Allocate memory for physdev_pci_device_add's optarr 2014-10-23 16:24:02 +01:00
zorro
Kconfig
Makefile