linux-kernel - [PATCH v1 0/2] ASoC: intel/sdw_utils: Add volume limits to CS35L56 and CS42L43 speakers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250430103134.24579-1-sbinding@opensource.cirrus.com>
Date: Wed, 30 Apr 2025 11:31:18 +0100
From: Stefan Binding <sbinding@...nsource.cirrus.com>
To: Mark Brown <broonie@...nel.org>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Péter Ujfalusi <peter.ujfalusi@...ux.intel.com>
Cc: linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...nsource.cirrus.com,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v1 0/2] ASoC: intel/sdw_utils: Add volume limits to CS35L56 and CS42L43 speakers

Both CS35L56 and CS42L43 have maximum volumes above 0dB.
However, for many use cases, this can cause distorted audio, depending
various factors, such as other signal-processing elements in the chain,
for example if the audio passes through a gain control before reaching
the amp or the signal path has been tuned for a particular maximum
gain in the amp.

In the cases where systems use the soc_sdw_* drivers, audio above the
0dB volume will likely always be distorted, therefore apply a 0dB
limit to those devices.

Stefan Binding (2):
  ASoC: intel/sdw_utils: Add volume limit to cs42l43 speakers
  ASoC: intel/sdw_utils: Add volume limit to cs35l56 speakers

 include/sound/soc_sdw_utils.h                |  1 +
 sound/soc/sdw_utils/soc_sdw_bridge_cs35l56.c |  4 ++++
 sound/soc/sdw_utils/soc_sdw_cs42l43.c        | 10 ++++++++
 sound/soc/sdw_utils/soc_sdw_cs_amp.c         | 24 ++++++++++++++++++++
 4 files changed, 39 insertions(+)

-- 
2.43.0