[PATCH v2 0/3] ALSA: Add the explicit appl_ptr sync support

[Takashi Iwai <tiwai@suse.de>]

Hi,

this is a revised patchset for supporting the explicit appl_ptr
update.  Since the protocol version from user-space needs to be stored
locally for each opened file, the check of status/control mmap was
slightly changed as well.  But the basic strategy is same as the
previous patchset.

Note that this patchset doesn't solve the issue that appl_ptr update
isn't properly notified to ack ops as Sakamoto-san pointed out
previously.  We'll still need to sort it out.  But the hack I
introduced here doesn't basically conflict with it, and it'll even
make it easier to solve later, by the new USER_PVERSION ioctl.


thanks,

Takashi

===

Takashi Iwai (3):
  ALSA: pcm: Add the explicit appl_ptr sync support
  ALSA: pcm: Add an ioctl to specify the supported protocol version
  ALSA: pcm: Limit the appl_ptr sync workaround only for old user-space

 include/sound/pcm.h         |  1 +
 include/uapi/sound/asound.h |  4 +++-
 sound/core/pcm_compat.c     |  1 +
 sound/core/pcm_native.c     | 34 ++++++++++++++++++++++++++++++++--
 4 files changed, 37 insertions(+), 3 deletions(-)

-- 
2.13.1