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From: Clemens Ladisch <clemens@ladisch.de>
To: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: alsa-devel@alsa-project.org, linux1394-devel@lists.sourceforge.net
Subject: Re: [PATCH 3/3] Add handling CMP output connection
Date: Mon, 29 Apr 2013 08:30:27 +0200	[thread overview]
Message-ID: <517E1383.3000603@ladisch.de> (raw)
In-Reply-To: <517DF48A.9000702@sakamocchi.jp>

Takashi Sakamoto wrote:
> Then I have a question about handling payload field. In specification,
> "The payload field shall specify the maximum number of quadlets that
> may be transmitted in a single isochronous packet for this plug" but
> actually cheking this field seems to make no sense because there is no
> checking process in the procedure. I think I can do nothing for
> payload field.

The specification was written for the general case where the device that
creates the connection might be different from the transmitting and
receiving devices.  In that case, the payload size is needed for correct
bandwidth allocation.

In our case, the Linux PC does not have plugs that could be accessed by
anybody else.  (And I'm not sure if the value set by the Fireworks
firmware is correct enough so that we'd want to use it.)


Regards,
Clemens

  reply	other threads:[~2013-04-29  6:30 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-04-28  4:59 [PATCH 0/3] snd-firewire-lib: add handling CMP output connection Takashi Sakamoto
2013-04-28  4:59 ` [PATCH 1/3] rename macros, variables and functions related to CMP plug Takashi Sakamoto
2013-04-28  4:59 ` [PATCH 2/3] Add "direction" member to cmp_connection structure Takashi Sakamoto
2013-04-28  4:59 ` [PATCH 3/3] Add handling CMP output connection Takashi Sakamoto
2013-04-28 12:52   ` Clemens Ladisch
2013-04-29  4:18     ` Takashi Sakamoto
2013-04-29  6:30       ` Clemens Ladisch [this message]
2013-04-29  9:25         ` Takashi Sakamoto
2013-04-29 12:38           ` Takashi Sakamoto
2013-04-29  9:44 ` [PATCH v2 0/3] snd-firewire-lib: add " Takashi Sakamoto
2013-04-29  9:44   ` [PATCH 1/3] rename macros, variables and functions related to CMP plug Takashi Sakamoto
2013-04-29  9:44   ` [PATCH 2/3] Add "direction" member to cmp_connection structure Takashi Sakamoto
2013-04-29  9:44   ` [PATCH 3/3] Add handling CMP output connection Takashi Sakamoto

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