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15175a4f2b
linux-next/sound
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Kai Vehmanen 15175a4f2b ALSA: hda/hdmi: add keep-alive support for ADL-P and DG2 
Implement HDA keep alive (KAE) support for Intel display codecs. When no
audio stream is active, the display codec will provide a continuous clock
and a valid but silent audio stream to any connected HDMI/DP receiver.
Without this, upon starting a new playback stream, initial samples may be
lost as many receivers require time to initialize for new clock.

This is a new feature in Intel AlderLake-P display codec implementation
and replaces the Intel i915 silent-stream extension that has been used
on older hardware. Main benefit of the new method is that codec no longer
needs to be kept in D0 power state.

This patch depends on commit 112a87c48e ("drm/i915/display: program
audio CDCLK-TS for keepalives").

[ a minor coding-style fix by tiwai ]

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Jyri Sarha <jyri.sarha@intel.com>
Link: https://lore.kernel.org/r/20220216172405.3994959-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-02-17 09:46:01 +01:00
..
ac97 bus: Make remove callback return void 2021-07-21 11:53:42 +02:00
aoa Kbuild updates for v5.15 2021-09-03 15:33:47 -07:00
arm ALSA: pxa2xx: Use managed PCM buffer allocation 2021-08-04 08:08:21 +02:00
atmel
core ALSA: memalloc: invalidate SG pages before sync 2022-02-10 13:36:53 +01:00
drivers ALSA: virmidi: Remove duplicated code 2022-01-06 16:08:18 +01:00
firewire ALSA: fireworks: add support for Loud Onyx 1200f quirk 2021-11-11 14:02:02 +01:00
hda ALSA: Replace acpi_bus_get_device() 2022-02-01 08:08:08 +01:00
i2c ALSA: i2c: tea6330t: Remove redundant initialization of variable err 2021-06-12 09:32:14 +02:00
isa ALSA: gus: Fix memory leaks at memory allocator error paths 2021-12-13 16:41:12 +01:00
mips ALSA: n64: check return value after calling platform_get_resource() 2021-06-12 09:31:13 +02:00
oss sound/oss/dmasound: Remove superfluous "break" 2021-05-27 08:24:23 +02:00
parisc parisc architecture updates for kernel 5.15: 2021-09-02 13:16:00 -07:00
pci ALSA: hda/hdmi: add keep-alive support for ADL-P and DG2 2022-02-17 09:46:01 +01:00
pcmcia ALSA: vx: Manage vx_core object with devres 2021-07-19 16:17:09 +02:00
ppc ALSA: ppc: beep: fix clang -Wimplicit-fallthrough 2021-12-07 15:36:56 +01:00
sh module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
soc ASoC: Fixes for v5.18 2022-02-14 17:55:39 +01:00
sparc ALSA: sparc: no need to initialise statics to 0 2021-12-12 10:01:04 +01:00
spi
synth ALSA: synth: missing check for possible NULL after the call to kstrdup 2021-11-09 07:18:50 +01:00
usb Merge branch 'for-linus' into for-next 2022-02-15 14:49:28 +01:00
virtio virtio: wrap config->reset calls 2022-01-14 18:50:52 -05:00
x86 ALSA: intel_hdmi: Check for error num after setting mask 2022-01-07 08:25:32 +01:00
xen xen: flag xen_snd_front to be not essential for system boot 2021-11-23 13:43:54 -06:00
ac97_bus.c
Kconfig
last.c
Makefile
sound_core.c