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From: Clemens Ladisch <clemens@ladisch.de>
To: Damien Zammit <damien.zammit@gmail.com>,
	Takashi Sakamoto <o-takashi@sakamocchi.jp>,
	Robin Gareus <robin@gareus.org>
Cc: tiwai@suse.de, alsa-devel@alsa-project.org, ffado-devel@lists.sf.net
Subject: Re: firewire mixer interface -- was Re: [PATCH 11/11] ALSA: digi00x:	apply double-oh-three algorism to multiplex PCM samples
Date: Fri, 20 Mar 2015 15:07:56 +0100	[thread overview]
Message-ID: <550C29BC.4040909@ladisch.de> (raw)
In-Reply-To: <550C26BA.3060703@gmail.com>

Damien Zammit wrote:
> On 21/03/15 00:25, Takashi Sakamoto wrote:
>> Any userspace applications can destroy packet streaming which kernel
>> driver starts, by transaction to streaming-related register.
>>
>> In current implementation of ALSA firewire stack and Linux FireWire
>> subsystem, we cannot avoid this.
>
> Does that mean the mixer control will need root permissions to execute
> in userspace because the /dev/fwX node is usually owned by root?

/dev/fw* of audio devices typically get a different group to allow FFADO
to run.  Whatever software implements these mixer controls (whether it
ends up called FFADO or not) would run with the same permissions.


Regards,
Clemens

  reply	other threads:[~2015-03-20 14:07 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-15 16:00 [RFC][PATCH 00/11] digi00x: new driver for Digidesign 002/003 family Takashi Sakamoto
2015-03-15 16:00 ` [PATCH 01/11] ALSA: digi00x: add skelton for Digi 002/003 device driver Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 02/11] ALSA: digi00x: add streaming functionality Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 03/11] ALSA: digi00x: add proc node for clock status Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 04/11] ALSA: digi00x: add PCM functionality Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 05/11] ALSA: digi00x: add MIDI functionality Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 06/11] ALSA: digi00x: add hwdep interface Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 07/11] ALSA: digi00x: support unknown asynchronous message Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 08/11] ALSA: digi00x: support MIDI ports for device control Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 09/11] ALSA: firewire-lib: allows to implement external MIDI callback function Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 10/11] digi00x: improve MIDI capture/playback Takashi Sakamoto
2015-03-15 16:01 ` [PATCH 11/11] ALSA: digi00x: apply double-oh-three algorism to multiplex PCM samples Takashi Sakamoto
2015-03-16 11:39   ` Damien Zammit
2015-03-16 13:24     ` Takashi Sakamoto
2015-03-16 14:25   ` Robin Gareus
2015-03-16 16:25     ` Takashi Sakamoto
2015-03-16 17:13       ` Robin Gareus
2015-03-16 22:47         ` Takashi Sakamoto
2015-03-17 13:37           ` Robin Gareus
2015-03-17 13:49             ` Damien Zammit
2015-03-18  1:06               ` Takashi Sakamoto
2015-03-19  5:18                 ` Damien Zammit
2015-03-19 13:59                 ` Robin Gareus
2015-03-19 22:46                   ` Takashi Sakamoto
2015-03-19 22:51                     ` Takashi Sakamoto
2015-03-20 12:05                     ` firewire mixer interface -- was " Robin Gareus
2015-03-20 13:00                       ` Clemens Ladisch
2015-03-20 13:25                       ` Takashi Sakamoto
2015-03-20 13:35                         ` Takashi Iwai
2015-03-20 13:51                           ` Takashi Sakamoto
2015-03-20 14:13                             ` Takashi Iwai
2015-03-20 14:45                               ` Takashi Sakamoto
2015-03-20 15:01                                 ` Takashi Iwai
2015-03-21  5:59                                   ` Damien Zammit
2015-03-22  2:55                                     ` Takashi Sakamoto
2015-03-22  5:56                                       ` [FFADO-devel] " Jonathan Woithe
2015-03-24  3:15                                       ` Robin Gareus
2015-03-20 13:55                         ` Damien Zammit
2015-03-20 14:07                           ` Clemens Ladisch [this message]
2015-03-22  6:11                       ` [FFADO-devel] " Jonathan Woithe

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