https://cos.googlesource.com/third_party/kernel/+/refs/tags/upstream/v5.15.16/sound/pci/ctxfi/ctpcm.h
sound/pci/ctxfi/ctpcm.h - third_party/kernel - Git at Google
third partysoundpci
https://android.googlesource.com/kernel/common/+/54068d61e7d8a34e60d828ed6fadb469fe2362cb/sound/pci/ctxfi/ctdaio.h
sound/pci/ctxfi/ctdaio.h - kernel/common - Git at Google
soundpcihkernelcommon