From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: [RFC PATCH 0/4] better support for bursty DMA usages
Date: Wed, 8 Jul 2015 05:10:32 -0500 [thread overview]
Message-ID: <1436350236-17509-1-git-send-email-pierre-louis.bossart@linux.intel.com> (raw)
Set of patches to fix issues with hw_ptr fuzziness [1] and increased buffering
w/ DSPs
1. disable rewinds to allow for new HDaudio SPIB DMA functionality (fetch up to
the application pointer, rewinds not supported)
2. report max in-flight bytes to avoid problems with stale data (late wake-ups,
rewinds)
[1] http://mailman.alsa-project.org/pipermail/alsa-devel/2015-June/093646.html
TODO:
1. fixes and alsa-lib updates (compile-tested only for now)
2. get feedback
3. if supported, set DMA buffering based on negotiation between driver and app (capabilities vs.
latency needs)
Pierre-Louis Bossart (4):
ALSA: core: let low-level driver or userspace disable rewinds
ALSA: core: add .notify callback for pcm ops
ALSA: core: add report of max dma burst
ALSA: hda: add default value for max_dma_burst
include/sound/pcm.h | 5 +++++
include/uapi/sound/asound.h | 6 ++++--
sound/core/pcm_lib.c | 19 +++++++++++++++++++
sound/core/pcm_native.c | 33 ++++++++++++++++++++++++++++++++-
sound/pci/hda/hda_controller.c | 1 +
5 files changed, 61 insertions(+), 3 deletions(-)
--
1.9.1
next reply other threads:[~2015-07-08 10:10 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-08 10:10 Pierre-Louis Bossart [this message]
2015-07-08 10:10 ` [RFC PATCH 1/4] ALSA: core: let low-level driver or userspace disable rewinds Pierre-Louis Bossart
2015-07-08 14:21 ` Takashi Iwai
2015-07-08 16:58 ` Pierre-Louis Bossart
2015-07-11 17:06 ` Alexander E. Patrakov
2015-07-14 3:32 ` Raymond Yau
2015-07-14 17:39 ` Alexander E. Patrakov
2015-07-15 1:23 ` Raymond Yau
2015-07-15 4:51 ` Alexander E. Patrakov
2015-07-28 14:19 ` Pierre-Louis Bossart
2015-07-28 15:43 ` Alexander E. Patrakov
2015-07-29 17:46 ` Pierre-Louis Bossart
2015-07-30 6:11 ` Alexander E. Patrakov
2015-07-30 13:46 ` Pierre-Louis Bossart
2015-07-08 10:10 ` [RFC PATCH 2/4] ALSA: core: add .notify callback for pcm ops Pierre-Louis Bossart
2015-07-08 14:27 ` Takashi Iwai
2015-07-08 17:10 ` Pierre-Louis Bossart
2015-07-09 14:44 ` Takashi Iwai
2015-07-09 7:25 ` Raymond Yau
2015-07-09 7:35 ` Pierre-Louis Bossart
2015-07-08 10:10 ` [RFC PATCH 3/4] ALSA: core: add report of max dma burst Pierre-Louis Bossart
2015-07-08 14:37 ` Takashi Iwai
2015-07-08 17:46 ` Pierre-Louis Bossart
2015-07-10 2:35 ` Raymond Yau
2015-07-10 17:13 ` Lars-Peter Clausen
2015-07-11 17:46 ` Alexander E. Patrakov
2015-07-11 18:28 ` Jaroslav Kysela
2015-07-16 2:11 ` Raymond Yau
2015-07-08 10:10 ` [RFC PATCH 4/4] ALSA: hda: add default value for max_dma_burst Pierre-Louis Bossart
2015-07-08 14:31 ` [RFC PATCH 0/4] better support for bursty DMA usages Takashi Iwai
2015-07-08 17:50 ` Pierre-Louis Bossart
2015-07-15 10:14 ` Raymond Yau
2015-07-15 10:38 ` Alexander E. Patrakov
2015-07-22 14:44 ` Raymond Yau
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