From: Oleksandr Andrushchenko <andr2000@gmail.com>
To: alsa-devel@alsa-project.org, xen-devel@lists.xenproject.org,
konrad.wilk@oracle.com, tiwai@suse.de
Cc: andr2000@gmail.com,
Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Subject: [Xen-devel][PATCH v3 0/5] sndif: add explicit back and front synchronization
Date: Mon, 19 Mar 2018 09:22:19 +0200 [thread overview]
Message-ID: <1521444144-12451-1-git-send-email-andr2000@gmail.com> (raw)
From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Hello, all!
In order to provide explicit synchronization between backend and
frontend the following changes are introduced in the protocol:
- bump protocol version to 2
- add new ring buffer for sending asynchronous events from
backend to frontend to report number of bytes played by the
frontend (XENSND_EVT_CUR_POS)
- introduce trigger events for playback control: start/stop/pause/resume
- add "req-" prefix to event-channel and ring-ref to unify naming
of the Xen event channels for requests and events
- add XENSND_OP_HW_PARAM_QUERY request to read/update
stream configuration space: request passes desired intervals/formats for
the stream parameters and the response returns allowed intervals and
formats mask that can be used.
Changes since v2:
1. Konrad's r-b tag for version patch
2. MAJOR: changed req/resp/evt packet sizes from 32 to 64 octets
3. Reworked XENSND_OP_HW_PARAM_QUERY so it now sends all
parameters at once, allowing to check all the configuration
space.
4. Minor documentation cleanup (added missed "reserved" fields)
Changes since v1:
1. Changed protocol version definition from string to integer,
so it can easily be used in comparisons.
Konrad, I have removed your r-b tag for the reason of this change.
2. In order to provide explicit stream parameter negotiation between
backend and frontend the following changes are introduced in the protocol:
add XENSND_OP_HW_PARAM_QUERY request to read/update
configuration space for the parameter given: request passes
desired parameter interval (mask) and the response to this request
returns min/max interval (mask) for the parameter to be used.
Parameters supported by this request/response:
- format mask
- sample rate interval
- number of channels interval
- buffer size, interval, frames
- period size, interval, frames
Oleksandr Andrushchenko (5):
sndif: Introduce protocol version
sndif: Fix missed "reserved" fields in comments
sndif: Make requests and responses 64 octets long
sndif: Add explicit back and front synchronization
sndif: Add explicit back and front parameter negotiation
xen/include/public/io/sndif.h | 322 +++++++++++++++++++++++++++++++++++++++---
1 file changed, 306 insertions(+), 16 deletions(-)
--
2.7.4
next reply other threads:[~2018-03-19 7:22 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-19 7:22 Oleksandr Andrushchenko [this message]
2018-03-19 7:22 ` [PATCH v3 1/5] sndif: Introduce protocol version Oleksandr Andrushchenko
2018-03-19 7:22 ` [Xen-devel][PATCH " Oleksandr Andrushchenko
2018-03-19 7:22 ` [Xen-devel][PATCH v3 2/5] sndif: Fix missed "reserved" fields in comments Oleksandr Andrushchenko
2018-03-19 7:22 ` [PATCH " Oleksandr Andrushchenko
2018-03-19 7:22 ` [Xen-devel][PATCH v3 3/5] sndif: Make requests and responses 64 octets long Oleksandr Andrushchenko
2018-03-19 7:22 ` [PATCH " Oleksandr Andrushchenko
2018-03-19 7:22 ` [PATCH v3 4/5] sndif: Add explicit back and front synchronization Oleksandr Andrushchenko
2018-03-19 7:22 ` [Xen-devel][PATCH " Oleksandr Andrushchenko
2018-03-19 7:22 ` [PATCH v3 5/5] sndif: Add explicit back and front parameter negotiation Oleksandr Andrushchenko
2018-03-19 7:22 ` [Xen-devel][PATCH " Oleksandr Andrushchenko
2018-03-20 20:22 ` [PATCH v3 0/5] sndif: add explicit back and front synchronization Takashi Iwai
2018-03-20 20:22 ` [Xen-devel][PATCH " Takashi Iwai
2018-03-21 7:15 ` [PATCH " Oleksandr Andrushchenko
2018-03-21 7:15 ` [Xen-devel][PATCH " Oleksandr Andrushchenko
2018-03-21 7:20 ` [PATCH " Takashi Iwai
2018-03-21 7:20 ` [Xen-devel][PATCH " Takashi Iwai
2018-03-21 7:25 ` [PATCH " Oleksandr Andrushchenko
2018-03-21 7:25 ` [Xen-devel][PATCH " Oleksandr Andrushchenko
2018-03-27 5:41 ` Oleksandr Andrushchenko
2018-04-03 5:37 ` Oleksandr Andrushchenko
2018-04-10 5:28 ` [PATCH " Oleksandr Andrushchenko
2018-04-10 5:28 ` [Xen-devel][PATCH " Oleksandr Andrushchenko
2018-04-03 5:37 ` [PATCH " Oleksandr Andrushchenko
2018-03-27 5:41 ` Oleksandr Andrushchenko
2018-04-12 14:31 ` Konrad Rzeszutek Wilk
2018-04-12 14:31 ` [Xen-devel][PATCH " Konrad Rzeszutek Wilk
2018-04-12 14:35 ` [PATCH " Oleksandr Andrushchenko
2018-04-12 14:35 ` [Xen-devel][PATCH " Oleksandr Andrushchenko
2018-04-06 9:13 ` [PATCH " Juergen Gross
2018-04-06 9:18 ` [Xen-devel] " Oleksandr Andrushchenko
2018-04-06 9:18 ` Oleksandr Andrushchenko
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