linux-kernel - [PATCH 0/6] ASoC: cs35l56: Handle vendor-specific UEFI variables

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Message-Id: <20250908155842.599459-1-rf@opensource.cirrus.com>
Date: Mon,  8 Sep 2025 16:58:36 +0100
From: Richard Fitzgerald <rf@...nsource.cirrus.com>
To: broonie@...nel.org
Cc: linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...nsource.cirrus.com
Subject: [PATCH 0/6] ASoC: cs35l56: Handle vendor-specific UEFI variables

This series adds handling for vendor-specific UEFI variables from Lenovo
and HP. These vendors will switch to using their UEFI variables instead
of the normal Cirrus Logic-defined mechanisms.

The model of speaker fitted (Speaker ID) is normally signaled by a GPIO,
and the driver is given access to this GPIO. Lenovo and HP will both stop
giving the driver access to the GPIO and instead the BIOS will create a
UEFI variable giving the value of the GPIO.

HP will also start using their own UEFI variable to store amp calibration
data. The content of the variable is the same as the Cirrus Logic variable,
only the UEFI name and GUID are changed.

Richard Fitzgerald (6):
  ASoC: cs-amp-lib: Rename defines for Cirrus Logic EFI
  ASoC: cs-amp-lib: Add handling for Lenovo and HP UEFI speaker ID
  ASoC: cs35l56: Check for vendor-specific speaker ID value
  ASoC: cs-amp-lib-test: Add tests for cs_amp_get_vendor_spkid()
  ASoC: cs-amp-lib: Add HP-specific EFI variable for calibration data
  ASoC: cs-amp-lib-test: Add test for getting cal data from HP EFI

 include/sound/cs-amp-lib.h         |   1 +
 sound/soc/codecs/cs-amp-lib-test.c | 254 ++++++++++++++++++++++++++++-
 sound/soc/codecs/cs-amp-lib.c      | 139 +++++++++++++++-
 sound/soc/codecs/cs35l56-shared.c  |  12 +-
 4 files changed, 397 insertions(+), 9 deletions(-)

-- 
2.39.5