[alsa-devel] [PATCH 00/14] Revised patchset for PCM in-kernel copy support

[Takashi Iwai]

Hi,

this is a sort of RFC, a revised patchset of the previous two patches
for killing set_fs() usages in PCM.  Instead of converting to the
merged copy_silence ops, this adds a new copy_kernel ops instead.
At the same time, copy/silence are changed to receive the position and
size in bytes instead of frames.  This allows us to simplify the PCM
core code.  As a result, a good amount of code could be removed from
pcm_lib.c.

Note that this patchset isn't complete, containing only two driver
conversions (nm256 for interleaved and rme9652 for non-interleaved) as
a demonstration.


Takashi

===

Takashi Iwai (14):
  ALSA: pcm: Introduce copy_user, copy_kernel and fill_silence ops
  ALSA: nm256: Convert to new PCM copy ops
  ALSA: rme9652: Convert to the new PCM ops
  ALSA: pcm: Drop the old copy and silence ops
  ALSA: pcm: Check PCM state by a common helper function
  ALSA: pcm: Shuffle codes
  ALSA: pcm: Call directly the common read/write helpers
  ALSA: pcm: More unification of PCM transfer codes
  ALSA: pcm: Unify read/write loop
  ALSA: pcm: Simplify snd_pcm_playback_silence()
  ALSA: pcm: Direct in-kernel read/write support
  usb: gadget: u_uac1: Kill set_fs() usage
  ALSA: pcm: Kill set_fs() in PCM OSS layer
  ALSA: pcm: Build OSS writev/readv helpers conditionally

 drivers/usb/gadget/function/u_uac1.c |   7 +-
 include/sound/pcm.h                  |  80 ++++-
 sound/core/oss/io.c                  |   4 +-
 sound/core/oss/pcm_oss.c             |  81 +----
 sound/core/oss/pcm_plugin.h          |   6 +-
 sound/core/pcm_lib.c                 | 551 +++++++++++++----------------------
 sound/pci/nm256/nm256.c              |  57 ++--
 sound/pci/rme9652/rme9652.c          |  71 +++--
 sound/soc/soc-pcm.c                  |   5 +-
 9 files changed, 386 insertions(+), 476 deletions(-)

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2.13.0