linux-kernel - [PATCH v2 00/11] ALSA: cs35l56: Add support for factory calibration

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Message-ID: <20251021105022.1013685-1-rf@opensource.cirrus.com>
Date: Tue, 21 Oct 2025 11:50:11 +0100
From: Richard Fitzgerald <rf@...nsource.cirrus.com>
To: broonie@...nel.org, tiwai@...e.com
Cc: linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...nsource.cirrus.com
Subject: [PATCH v2 00/11] ALSA: cs35l56: Add support for factory calibration

Until now, all products with an amplifier supported by the cs35l56 driver
have shipped with Microsoft Windows pre-installed. The factory calibration
of speaker protection has therefore been done using the Windows driver.

However, products that ship with a Linux-based distro must be able to
perform the factory calibration procedure from within the Linux-based
environment. This patch series adds that support.

NOTE: unfortunately this is yet another series that is mainly ASoC but
also needs some changes to the HDA driver, and they have build dependencies
on the ASoC code. I suggest taking this all through Mark's tree and we'll
avoid sending any other commits to the HDA driver until it has all landed
in Takashi's tree.

Changes since V1:
- Changed the file handlers to be debugfs files instead of sysfs files.

Richard Fitzgerald (11):
  ASoC: cs35l56: Read silicon ID during initialization and save it
  ASoC: cs-amp-lib: Add helpers for factory calibration
  ASoC: cs35l56: Add common code for factory calibration
  ASoC: cs35l56: Create debugfs files for factory calibration
  ALSA: hda/cs35l56: Create debugfs files for factory calibration
  ASoC: cs-amp-lib-test: Add cases for factory calibration helpers
  ASoC: cs-amp-lib: Return attributes from cs_amp_get_efi_variable()
  ASoC: cs-amp-lib: Add function to write calibration to UEFI
  ASoC: cs35l56: Add calibration command to store into UEFI
  ALSA: hda/cs35l56: Set cal_index to the amp index
  ASoC: cs-amp-lib-test: Add test cases for
    cs_amp_set_efi_calibration_data()

 include/sound/cs-amp-lib.h                 |   25 +-
 include/sound/cs35l56.h                    |   35 +
 sound/hda/codecs/side-codecs/Kconfig       |   15 +
 sound/hda/codecs/side-codecs/cs35l56_hda.c |  116 +-
 sound/hda/codecs/side-codecs/cs35l56_hda.h |    6 +
 sound/soc/codecs/Kconfig                   |   18 +
 sound/soc/codecs/cs-amp-lib-test.c         | 1491 +++++++++++++++++++-
 sound/soc/codecs/cs-amp-lib.c              |  345 ++++-
 sound/soc/codecs/cs35l56-shared.c          |  368 ++++-
 sound/soc/codecs/cs35l56.c                 |  159 +++
 sound/soc/codecs/cs35l56.h                 |    6 +
 11 files changed, 2530 insertions(+), 54 deletions(-)

-- 
2.47.3