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| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2024-02-23 18:39:06 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-02-23 20:21:39 +0300 |
| commit | 1cad8725f2b98965ed3658bc917090b30adb14fa (patch) | |
| tree | edf4394c43847e1e18c069d7e3109559557f49b0 /sound/soc/codecs/Kconfig | |
| parent | 5519ac3a7164d5d1c31879bf5b0d279b58c8e88f (diff) | |
| download | linux-1cad8725f2b98965ed3658bc917090b30adb14fa.tar.xz | |
ASoC: cs-amp-lib: Add helpers for factory calibration data
Create a new library for code that is used by multiple Cirrus Logic
amps. This initially implements extracting amp calibration data
from EFI and writing it to firmware controls.
During factory calibration of built-in speakers the firmware
calibration constants are stored in an EFI file. The file contains
an array of calibration constants for each of the speakers.
cs_amp_get_calibration_data() searches for an entry matching the
requested UID stamp, otherwise by array index. If the data is found in
EFI the constants for that speaker are copied back to the caller.
If EFI is not enabled, the cs_amp_get_calibration_data() implementation
will compile to simply return -ENOENT and the linker can drop the code.
The code to write calibration controls uses cs_dsp. Building of cs_dsp
is not forced. Instead, the code will compile away the calls to
cs_dsp if cs_dsp is not reachable.
This strategy of conditional code allows cs-amp-lib to be shared by
multiple drivers without forcing inclusion of other modules that might
be unnecessary.
The calls to efi.get_variable() and cs_dsp are in small wrapper
functions. This is so that a KUNIT_STATIC_STUB_REDIRECT can be added in
a future patch to redirect these calls to replacement functions for
KUnit testing.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20240223153910.2063698-3-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/Kconfig')
| -rw-r--r-- | sound/soc/codecs/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 59f9742e9ff4..109848a7a413 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -727,6 +727,9 @@ config SND_SOC_CROS_EC_CODEC If you say yes here you will get support for the ChromeOS Embedded Controller's Audio Codec. +config SND_SOC_CS_AMP_LIB + tristate + config SND_SOC_CS35L32 tristate "Cirrus Logic CS35L32 CODEC" depends on I2C |