Support a larger range of amp feedback channel counts #9624
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Replace the hardcoded assumption of 2 feedback channels per link
A new constant AMP_FEEDBACK_CH_PER_LINK is added to set the number of
channels for the link BE DAI, replacing the original hardcoded value
of 2.
The default values are:
For NUM_SDW_AMP_LINKS=1:
AMP_FEEDBACK_CH=2, AMP_FEEDBACK_CH_PER_LINK=2
For NUM_SDW_AMP_LINKS=2:
AMP_FEEDBACK_CH=4, AMP_FEEDBACK_CH_PER_LINK=2
The alh-copier definition has been rewritten so that it is based only on
AMP_FEEDBACK_CH, instead of making assumptions from NUM_SDW_AMP_LINKS.
It supports 2 or 4 total feedback channels. Support for 1 and 3 feedback
channels has not been included because these are unusual and the code is
smaller without them. They can be added later if they are needed.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Add support for 6 channel and 8 channel amp feedback. The host-copier defaults provide 2 channel stereo and 4 channel 3.1. Use the value of AMP_FEEDBACK_CH to set special case input and output formats for 6 channels and 8 channels. The alh-copier also needs special cases for 6 and 8 channels. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
lgirdwood
approved these changes
Oct 30, 2024
|
@bardliao pls review |
bardliao
approved these changes
Oct 30, 2024
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These two patches expand the possible combinations of feedback channel count and number of links.
It has been tested on these combinations:
1 bus, 2 amps, 1 fb channel per amp, total 2 channels
1 bus, 2 amps, 2 fb channel per amp, total 4 channels
1 bus, 4 amps, 1 fb channel per amp, total 4 channels
2 buses, 1 amp per bus, 1 fb channel per amp, total 2 channels
2 buses, 1 amp per bus, 2 fb channel per amp, total 4 channels
2 buses, 1 amp per bus, 4 fb channel per amp, total 8 channels
2 buses, 2 amp per bus, 1 fb channel per amp, total 4 channels
2 buses, 2 amp per bus, 2 fb channel per amp, total 8 channels
2 buses, 3 amp per bus, 1 fb channel per amp, total 6 channels
2 buses, 4 amp per bus, 1 fb channel per amp, total 8 channels