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@bardliao We can do this in steps (multiple PRs), but we need to enable USE_CHAIN_DMA in all topoplogies unless there's a very strong reason not do. This enables bitstream passthrough for display audio.
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Can we set USE_CHAIN_DMA = true by default? Like
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We should use HDMI_USE_CHAIN_DMA to make sure we don't make any confusions. HDaudio can also be handled with chain_dma.
Also this should be a global property for MTL, not something that is changed in each variant.
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All theses cases need to be updated with NUM_HDMI=0 removed and CHAIN_DMA set:
https://github.com/thesofproject/sof/pull/8527/files/417e167c0688a83ae2f95f1aa2fdec553ec02e59#diff-0ac40f848737bb3a9eceac9f3a1f9d86436f053a08378a28777cc779d2467f54R23
https://github.com/thesofproject/sof/pull/8527/files/417e167c0688a83ae2f95f1aa2fdec553ec02e59#diff-0ac40f848737bb3a9eceac9f3a1f9d86436f053a08378a28777cc779d2467f54R27
https://github.com/thesofproject/sof/pull/8527/files/417e167c0688a83ae2f95f1aa2fdec553ec02e59#diff-0ac40f848737bb3a9eceac9f3a1f9d86436f053a08378a28777cc779d2467f54R40
https://github.com/thesofproject/sof/pull/8527/files/417e167c0688a83ae2f95f1aa2fdec553ec02e59#diff-0ac40f848737bb3a9eceac9f3a1f9d86436f053a08378a28777cc779d2467f54R43
https://github.com/thesofproject/sof/pull/8527/files/417e167c0688a83ae2f95f1aa2fdec553ec02e59#diff-0ac40f848737bb3a9eceac9f3a1f9d86436f053a08378a28777cc779d2467f54R47
No reason to special-case a subset of SoundWire topologies