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CVS commit: [netbsd-8] src/sys/arch/x68k/dev

Module Name:    src
Committed By:   snj
Date:           Sat Sep 23 18:16:20 UTC 2017

Modified Files:
        src/sys/arch/x68k/dev [netbsd-8]: vs.c vsvar.h

Log Message:
Pull up following revision(s) (requested by isaki in ticket #172):
        sys/arch/x68k/dev/vs.c: 1.38-1.39, 1.41-1.44, 1.47-1.48 via patch
        sys/arch/x68k/dev/vsvar.h: 1.12-1.15 via patch
Avoid panic when the device is closed when not playing.
Catch up vs_set_params() to recent MI audio (after in-kernel mixer).
Before that, MD part had to support all encodings I'd like to support,
but currently it's no longer necessary.  The hardware is
4bit/1ch/15.6kHz ADPCM but it behaves as 16bit/1ch/16.0kHz PCM.
For audio.c < 1.362, the device attach succeeded and playback is
still working.
For audio.c >= 1.363, the device attach fails again.
It does not work yet but I commit it for milestone.
Update confused vs_set_params().
play and rec are identical but pfil and rfil are independent.
XXX I introduce VS_USE_PREC8 option for debugging purposes
    temporarily.  I'll remove it if the problem is solved.
Remove temporary VS_USE_PREC8 option.
vs(4) now supports slinear16be and slinear8 (but now work yet).
vs(4) became to able to play audio again.
At the moment the encoding conversion using set_params() does
not seem to work for me.  So vs(4) uses local conversion to/from
ADPCM instead of it.  But this should be a temporary work.
XXX The playback quality is very poor compared to before...
XXX Recording is not tested.
Merge prate and rrate.  These can not be separated.
- Revert temporary local conversion introduced at rev 1.43.
- But does not revert to trigger method.  trigger method is not suitable for
  x68k ADPCM+DMA mechanism.
- Don't (re)start ADPCM when DMA is running.  This solves the noise.
  From Y.Sugahara.
- Cache dmac xfer.
- Finally MI audio supports 4bit precision format without null_filter hack!
- Fix reusing play/rec argument as local variables.  It is in/out parameter.

To generate a diff of this commit:
cvs rdiff -u -r1.37.2.1 -r1.37.2.2 src/sys/arch/x68k/dev/vs.c
cvs rdiff -u -r1.11 -r1.11.42.1 src/sys/arch/x68k/dev/vsvar.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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