From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Bryce McKinlay <bryce@waitaki.otago.ac.nz>
Cc: <linuxppc-dev@lists.linuxppc.org>,
Jeff Koftinoff <jeffk@jdkoftinoff.com>, <havardk@xmms.org>
Subject: Re: Byte order in sound drivers
Date: Sun, 2 Dec 2001 18:17:24 +0100 [thread overview]
Message-ID: <20011202171724.10074@smtp.wanadoo.fr> (raw)
In-Reply-To: <20011202095651.24942@smtp.wanadoo.fr>
>It depends on the HW you have. Most recent machines don't do HW
>byteswap, and so accept only big-endian samples. The way this is
>implemented in our driver currently is a bit weird though, the
>setformat ioctl won't fail when trying to set an LE format, but
>it will set the equivalent BE format. So the application is
>expected to read back the format to figure out what had to be
>done.
Well, the current dmasound behaviour is definitely broken. I'm
changing it now so that when asked for an _LE format on a chip
that do only _BE will return -EINVAL.
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-12-02 17:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-01 10:16 Byte order in sound drivers Bryce McKinlay
2001-12-01 10:38 ` Jeff Koftinoff
2001-12-02 3:05 ` Bryce McKinlay
2001-12-02 3:14 ` Bryce McKinlay
2001-12-02 9:56 ` Benjamin Herrenschmidt
2001-12-02 17:17 ` Benjamin Herrenschmidt [this message]
2001-12-09 18:00 ` Giuliano Pochini
2001-12-02 18:42 ` Haavard Kvaalen
2001-12-02 22:39 ` Bryce McKinlay
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