AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/sound
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Lukas Wunner 94989e318b ALSA: hda - Force runtime PM on Nvidia HDMI codecs 
Przemysław Kopa reports that since commit b516ea586d ("PCI: Enable
NVIDIA HDA controllers"), the discrete GPU Nvidia GeForce GT 540M on his
2011 Samsung laptop refuses to runtime suspend, resulting in a power
regression and excessive heat.

Rivera Valdez witnesses the same issue with a GeForce GT 525M (GF108M)
of the same era, as does another Arch Linux user named "R0AR" with a
more recent GeForce GTX 1050 Ti (GP107M).

The commit exposes the discrete GPU's HDA controller and all four codecs
on the controller do not set the CLKSTOP and EPSS bits in the Supported
Power States Response.  They also do not set the PS-ClkStopOk bit in the
Get Power State Response.  hda_codec_runtime_suspend() therefore does
not call snd_hdac_codec_link_down(), which prevents each codec and the
PCI device from runtime suspending.

The same issue is present on some AMD discrete GPUs and we addressed it
by forcing runtime PM despite the bits not being set, see commit
57cb54e53b ("ALSA: hda - Force to link down at runtime suspend on
ATI/AMD HDMI").

Do the same for Nvidia HDMI codecs.

Fixes: b516ea586d ("PCI: Enable NVIDIA HDA controllers")
Link: https://bbs.archlinux.org/viewtopic.php?pid=1865512
Link: https://bugs.freedesktop.org/show_bug.cgi?id=75985#c81
Reported-by: Przemysław Kopa <prymoo@gmail.com>
Reported-by: Rivera Valdez <riveravaldez@ysinembargo.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: Daniel Drake <dan@reactivated.net>
Cc: stable@vger.kernel.org # v5.3+
Link: https://lore.kernel.org/r/3086bc75135c1e3567c5bc4f3cc4ff5cbf7a56c2.1571324194.git.lukas@wunner.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-10-17 17:45:32 +02:00
..
ac97 ALSA: ac97: Fix double free of ac97_codec_device 2019-07-23 14:16:11 +02:00
aoa ALSA: aoa: onyx: always initialize register read value 2019-07-29 09:21:39 +02:00
arm
atmel
core dma-mapping updates for 5.4: 2019-09-19 13:27:23 -07:00
drivers
firewire ALSA: dice: fix wrong packet parameter for Alesis iO26 2019-09-16 23:46:14 +02:00
hda ALSA: hdac: clear link output stream mapping 2019-10-07 03:58:48 +02:00
i2c ALSA: i2c: ak4xxx-adda: Fix a possible null pointer dereference in build_adc_controls() 2019-07-26 14:25:37 +02:00
isa ALSA: sb: remove redundant assignment to variable result 2019-08-14 17:44:06 +02:00
mips
oss sound: dmasound_atari: Mark expected switch fall-through 2019-07-30 09:36:13 +02:00
parisc
pci ALSA: hda - Force runtime PM on Nvidia HDMI codecs 2019-10-17 17:45:32 +02:00
pcmcia
ppc ALSA: ps3: Remove Unneeded variable: "ret" 2019-07-10 11:53:31 +02:00
sh
soc sound fixes for 5.4-rc1 2019-09-24 16:46:16 -07:00
sparc ALSA: sparc: Mark expected switch fall-throughs 2019-07-30 09:37:01 +02:00
spi
synth
usb ALSA: usb-audio: Disable quirks for BOSS Katana amplifiers 2019-10-17 10:19:05 +02:00
x86
xen ASoC: Updates for v5.3 2019-07-08 14:45:34 +02:00
ac97_bus.c
Kconfig
last.c
Makefile
sound_core.c sound: fix a memory leak bug 2019-08-08 08:18:32 +02:00