From: Vinod Koul <vinod.koul@intel.com>
To: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>
Cc: alsa-devel@alsa-project.org, tiwai@suse.de, lgirdwood@gmail.com,
Ramesh Babu <ramesh.babu@intel.com>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
patches.audio@intel.com, broonie@kernel.org
Subject: Re: [PATCH v3] ALSA: core: let low-level driver or userspace disable rewinds
Date: Mon, 19 Jun 2017 13:33:47 +0530 [thread overview]
Message-ID: <20170619080347.GI19154@localhost> (raw)
In-Reply-To: <1497853357-2931-1-git-send-email-subhransu.s.prusty@intel.com>
On Mon, Jun 19, 2017 at 11:52:37AM +0530, Subhransu S. Prusty wrote:
> From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
>
> Add new hw_params flag to explicitly tell driver that rewinds will never
> be used. This can be used by low-level driver to optimize DMA operations
> and reduce power consumption. Use this flag only when data written in
> ring buffer will never be invalidated, e.g. any update of appl_ptr is
> final.
>
> Note that the update of appl_ptr include both a read/write data
> operation as well as snd_pcm_forward() whose behavior is not modified.
Reviewed-By: Vinod Koul <vinod.koul@intel.com>
--
~Vinod
next prev parent reply other threads:[~2017-06-19 8:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-19 6:22 [PATCH v3] ALSA: core: let low-level driver or userspace disable rewinds Subhransu S. Prusty
2017-06-19 8:03 ` Vinod Koul [this message]
2017-06-19 8:44 ` Takashi Iwai
2017-06-19 15:16 ` Pierre-Louis Bossart
2017-06-19 15:25 ` Takashi Iwai
2017-06-19 15:38 ` Pierre-Louis Bossart
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170619080347.GI19154@localhost \
--to=vinod.koul@intel.com \
--cc=alsa-devel@alsa-project.org \
--cc=broonie@kernel.org \
--cc=lgirdwood@gmail.com \
--cc=patches.audio@intel.com \
--cc=pierre-louis.bossart@linux.intel.com \
--cc=ramesh.babu@intel.com \
--cc=subhransu.s.prusty@intel.com \
--cc=tiwai@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox