Re: [PATCH 0/2] ASoC: cs35l56/57/62/63: Use the correct SoundWire DP for feedback

[Pierre-Louis Bossart]

On 10/5/26 17:52, Richard Fitzgerald wrote:
> The amp feedback path (AEC) was incorrectly using SoundWire DP3.
> The firmware outputs SDCA OT25 feedback on DP4. DP3 is reserved for
> SDCA companion amp.
> 
> This series adds a DAI for OT25 and switches the sdw machine driver
> to use the new DAI for the feedback path.

Is there any merit in keeping this DP3 exposed as a capture DAI, if
indeed it's intended to be a side connection for a companion chip?

I never quite understood how those companion chips would be managed,
IIRC we don't have support for device-to-device transfers, do we? the
entire stream definition and bandwidth calculation are based on a host
port as source or target.

> Richard Fitzgerald (2):
>   ASoC: cs35l56: Add DAI for SDCA OT25 stream
>   ASoC: sdw_utils: Switch CS35L56/57/62/63 to use OT25 DAI
> 
>  include/sound/cs35l56.h             |  1 +
>  sound/soc/codecs/cs35l56-sdw.c      |  9 +++--
>  sound/soc/codecs/cs35l56.c          | 54 +++++++++++++++++++++++++++++
>  sound/soc/sdw_utils/soc_sdw_utils.c |  8 ++---
>  4 files changed, 66 insertions(+), 6 deletions(-)
>