From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Oleksandr Andrushchenko <andr2000@gmail.com>,
xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org,
alsa-devel@alsa-project.org
Cc: jgross@suse.com, iurii.konovalenko@globallogic.com,
konrad.wilk@oracle.com, tiwai@suse.de,
Oleksandr Grytsov <oleksandr_grytsov@epam.com>
Subject: Re: [PATCH RESEND] xen/sndif: Sync up with the canonical definition in Xen
Date: Tue, 17 Apr 2018 11:10:36 -0400 [thread overview]
Message-ID: <9f6398a3-7e85-9345-4e2a-afb5b69dcff8@oracle.com> (raw)
In-Reply-To: <20180412172627.18065-1-oleksandr_andrushchenko@epam.com>
On 04/12/2018 01:26 PM, Oleksandr Andrushchenko wrote:
> This is the sync up with the canonical definition of the sound
> protocol in Xen:
>
> 1. Protocol version was referenced in the protocol description,
> but missed its definition. Fixed by adding a constant
> for current protocol version.
>
> 2. Some of the request descriptions have "reserved" fields
> missed: fixed by adding corresponding entries.
>
> 3. Extend the size of the requests and responses to 64 octets.
> Bump protocol version to 2.
>
> 4. Add explicit back and front synchronization
> In order to provide explicit synchronization between backend and
> frontend the following changes are introduced in the protocol:
> - 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
>
> 5. Add explicit back and front parameter negotiation
> 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 parameters given: request passes
> desired parameter's intervals/masks and the response to this request
> returns allowed min/max intervals/masks to be used.
>
> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
> Signed-off-by: Oleksandr Grytsov <oleksandr_grytsov@epam.com>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Cc: Takashi Iwai <tiwai@suse.de>
>
Applied to for-linus-4.17
-boris
prev parent reply other threads:[~2018-04-17 15:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-12 17:26 [PATCH RESEND] xen/sndif: Sync up with the canonical definition in Xen Oleksandr Andrushchenko
2018-04-12 17:46 ` Boris Ostrovsky
2018-04-12 18:30 ` Konrad Rzeszutek Wilk
2018-04-17 15:10 ` Boris Ostrovsky [this message]
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