linux/sound
Takashi Iwai ae5b14170e ALSA: hda/realtek - Always immediately update mute LED with pin VREF
commit e40bdb03d3 upstream.

Some HP laptops have a mute mute LED controlled by a pin VREF.  The
Realtek codec driver updates the VREF via vmaster hook by calling
snd_hda_set_pin_ctl_cache().

This works fine as long as the driver is running in a normal mode.
However, when the VREF change happens during the codec being in
runtime PM suspend, the regmap access will skip and postpone the
actual register change.  This ends up with the unchanged LED status
until the next runtime PM resume even if you change the Master mute
switch.  (Interestingly, the machine keeps the LED status even after
the codec goes into D3 -- but it's another story.)

For improving this usability, let the driver temporarily powering up /
down only during the pin VREF change.  This can be achieved easily by
wrapping the call with snd_hda_power_up_pm() / *_down_pm().

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=199073
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-03-28 18:40:13 +02:00
..
aoa
arm ASoC: pxa: pxa-pcm-lib: switch over to snd-soc-dmaengine-pcm 2015-09-30 23:21:16 +01:00
atmel
core ALSA: seq: Clear client entry before deleting else at closing 2018-03-22 09:23:31 +01:00
drivers ALSA: aloop: Fix access to not-yet-ready substream via cable 2018-03-28 18:40:13 +02:00
firewire ALSA: firewire-digi00x: handle all MIDI messages on streaming packets 2018-03-22 09:23:24 +01:00
hda ALSA: hda: Drop useless WARN_ON() 2018-01-02 20:33:22 +01:00
i2c
isa ALSA: msnd: Optimize / harden DSP and MIDI loops 2017-09-13 14:09:46 -07:00
mips
oss
parisc
pci ALSA: hda/realtek - Always immediately update mute LED with pin VREF 2018-03-28 18:40:13 +02:00
pcmcia ALSA: vx: Fix possible transfer overflow 2017-11-21 09:21:20 +01:00
ppc ALSA: ppc/awacs: shut up maybe-uninitialized warning 2017-05-08 07:46:01 +02:00
sh
soc ASoC: Intel: Skylake: Uninitialized variable in probe_codec() 2018-03-24 10:58:43 +01:00
sparc ALSA: Add missing dependency on CONFIG_SND_TIMER 2016-02-17 12:30:58 -08:00
spi
synth ALSA: synth: Fix conflicting OSS device registration on AWE32 2015-10-05 16:55:09 +02:00
usb ALSA: usb-audio: Add a quirck for B&W PX headphones 2018-03-11 16:19:44 +01:00
ac97_bus.c ASoC: Updates for v4.3 2015-08-31 16:25:22 +02:00
Kconfig
last.c
Makefile
sound_core.c sound: fix check for error condition of register_chrdev() 2015-11-07 11:14:30 +01:00
sound_firmware.c