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soundwire: cadence: add BTP/BRA helpers to format data
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The Cadence IP expects a specific format (detailed in the
Documentation). Add helpers to copy the data into the DMA buffer.

The crc8 table is for now only used by the Cadence driver. This table
might be moved to a common module at a later point if needed by other
controller implementations.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Tested-by: shumingf@realtek.com
Link: https://lore.kernel.org/r/20250227140615.8147-10-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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Pierre-Louis Bossart authored and Vinod Koul committed Mar 10, 2025
1 parent 8e4a239 commit 8eb5d7a
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1 change: 1 addition & 0 deletions drivers/soundwire/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@ config SOUNDWIRE_AMD

config SOUNDWIRE_CADENCE
tristate
select CRC8

config SOUNDWIRE_INTEL
tristate "Intel SoundWire Master driver"
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