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

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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 <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20250612121428.1667-4-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Richard Fitzgerald
2025-06-12 13:14:28 +01:00
committed by Mark Brown
parent e5d5b3aebd
commit fa8fae5f82
1 changed files with 13 additions and 0 deletions
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13
Documentation/sound/codecs/cs35l56.rst
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@@ -104,6 +104,13 @@ In this example the SSID is 10280c63.
The format of the firmware file names is:
SoundWire (except CS35L56 Rev B0):
cs35lxx-b0-dsp1-misc-SSID[-spkidX]-l?u?
SoundWire CS35L56 Rev B0:
cs35lxx-b0-dsp1-misc-SSID[-spkidX]-ampN
Non-SoundWire (HDA and I2S):
cs35lxx-b0-dsp1-misc-SSID[-spkidX]-ampN
Where:
@@ -111,12 +118,18 @@ Where:
* cs35lxx-b0 is the amplifier model and silicon revision. This information
is logged by the driver during initialization.
* SSID is the 8-digit hexadecimal SSID value.
* l?u? is the physical address on the SoundWire bus of the amp this
file applies to.
* ampN is the amplifier number (for example amp1). This is the same as
the prefix on the ALSA control names except that it is always lower-case
in the file name.
* spkidX is an optional part, used for laptops that have firmware
configurations for different makes and models of internal speakers.
The CS35L56 Rev B0 continues to use the old filename scheme because a
large number of firmware files have already been published with these
names.
Sound Open Firmware and ALSA topology files
-------------------------------------------