CVS commit: src/sys/dev/pci

["Tetsuya Isaki" <isaki%netbsd.org@localhost>]

Module Name:    src
Committed By:   isaki
Date:           Sat May 25 04:25:30 UTC 2019

Modified Files:
        src/sys/dev/pci: yds.c

Log Message:
Fix yds_intr.  It has not worked well since netbsd-8.
- Read data offset before set ACTV2.
- The interrupts occur every hardware block, not blocksize specified
  by round_blocksize.  The hardware block may span (upper layer's)
  two blocks.  So bus_dmamap_sync'ing each (upper layer's) block is
  not enough.
  XXX To fix this, Use only 48kHz and drop other frequencies. It can
  make blocksize fixed.  Then the hardware block aligns to upper layer's
  block alignment.
Analyzed by Y.Sugahara.


To generate a diff of this commit:
cvs rdiff -u -r1.62 -r1.63 src/sys/dev/pci/yds.c

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