kernel/linux.git/Documentation/sound/codecs, branch v7.2-rc1

ASoC: Add support for GPIOs driven amplifiers

2026-05-18T16:44:18+00:00

Herve Codina says: On some embedded system boards, audio amplifiers are designed using discrete components such as op-amp, several resistors and switches to either adjust the gain (switching resistors) or fully switch the audio signal path (mute and/or bypass features). Those switches are usually driven by simple GPIOs. This kind of amplifiers are not handled in ASoC and the fallback is to let the user-space handle those GPIOs out of the ALSA world. In order to have those kind of amplifiers fully integrated in the audio stack, this series introduces the audio-gpio-amp to handle them. This new ASoC component allows to have the amplifiers seen as ASoC auxiliarty devices and so it allows to control them through audio mixer controls. In order to ease the review, I choose to split modifications related to the merge of the gpio-audio-amp part into the simple-amplfier driver in several commits. Link: https://patch.msgid.link/20260513081702.317117-1-herve.codina@bootlin.com

ALSA: doc: cs35l56: Update path to HDA driver source

2026-05-15T06:53:34+00:00

The HDA drivers were moved to sound/hda/... so update a Documentation reference that still pointed to the old location. Signed-off-by: Richard Fitzgerald Link: https://patch.msgid.link/20260511104148.36382-1-rf@opensource.cirrus.com Signed-off-by: Takashi Iwai

ASoC: docs: fix TAS675x doc build warnings

2026-04-30T06:04:59+00:00

Add tas675x.rst to the index file and extend the heading underline to avoid build warnings: Documentation/sound/codecs/tas675x.rst: WARNING: document isn't included in any toctree [toc.not_included] Documentation/sound/codecs/tas675x.rst:659: WARNING: Title underline too short. Overtemperature Shutdown (0x87) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [docutils] Fixes: ba46edca354e ("Documentation: sound: Add TAS675x codec mixer controls documentation") Signed-off-by: Randy Dunlap Link: https://patch.msgid.link/20260429225751.1995224-1-rdunlap@infradead.org Signed-off-by: Mark Brown

Documentation: sound: Add TAS675x codec mixer controls documentation

2026-04-26T23:36:17+00:00

Add documentation for the TAS675x mixer controls, fault monitoring, and driver known limitations. Signed-off-by: Sen Wang Link: https://patch.msgid.link/20260416232640.3084132-4-sen@ti.com Signed-off-by: Mark Brown

ASoC: doc: cs35l56: Update firmware filename description for B0 silicon

2025-11-03T13:09:14+00:00

Update the text for firmware file naming to show that the l?u? suffix is supported on CS35L56 B0 silicon and ampN was only used on early firmware. The previous version of this text only said that B0 silicon used the ampN suffix. Since kernel 6.16 the driver supports both the old ampN and new l?u? suffix for B0 silicon. New firmwares will use the l?u? suffix. Signed-off-by: Richard Fitzgerald Link: https://patch.msgid.link/20251103115809.33953-1-rf@opensource.cirrus.com Signed-off-by: Mark Brown

ASoC: doc: cs35l56: Add CS35L63 to the list of supported devices

2025-06-18T16:22:48+00:00

Add CS35L63 to the list of parts supported by the cs35l56 driver and mention the CS35L63 where the text refers to the supported part numbers. Signed-off-by: Richard Fitzgerald Link: https://patch.msgid.link/20250618145547.152814-1-rf@opensource.cirrus.com Signed-off-by: Mark Brown

ASoC: doc: cs35l56: Update to add new SoundWire firmware filename suffix

2025-06-12T12:21:45+00:00

Add the new firmware filename suffix used for SoundWire systems with CS35L57, CS35L63 or CS35L56 later than B0 silicon. This uses the SoundWire physical address of the amp to identify which firmware file to load on that amp. Signed-off-by: Richard Fitzgerald Link: https://patch.msgid.link/20250612121428.1667-4-rf@opensource.cirrus.com Signed-off-by: Mark Brown

ALSA: doc: cs35l56: Add information about Cirrus Logic CS35L54/56/57

2025-01-08T16:21:44+00:00

Add documentation for the Cirrus Logic CS35L54/56/57 amps, which are all managed by the cs35l56 drivers. The aim and scope of this documentation is to provide troubleshooting information for end-users. Signed-off-by: Richard Fitzgerald Link: https://patch.msgid.link/20250108141045.1032-1-rf@opensource.cirrus.com Signed-off-by: Mark Brown