linux-kernel - Re: [alsa-devel] SB16 build error.

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Message-ID: <4E0C75BD.1050103@ladisch.de>
Date:	Thu, 30 Jun 2011 15:10:21 +0200
From:	Clemens Ladisch <clemens@...isch.de>
To:	Ralf Baechle <ralf@...ux-mips.org>
CC:	Takashi Iwai <tiwai@...e.de>, linux-arch@...r.kernel.org,
	linux-mips@...ux-mips.org, alsa-devel@...a-project.org,
	florian@...ux-mips.org, "David S. Miller" <davem@...emloft.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linux-kernel@...r.kernel.org,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	sparclinux@...r.kernel.org, Paul Mackerras <paulus@...ba.org>,
	Matt Turner <mattst88@...il.com>,
	Florian Fainelli <florian@...nwrt.org>,
	Richard Henderson <rth@...ddle.net>
Subject: Re: [alsa-devel] SB16 build error.

Ralf Baechle wrote:
> I have no idea how big the soundblaster microcode being loaded actually is,
> that is if the reduced size of 0x1f00 will be sufficient.

The biggest file is WFM0001A.CSP with 0x2df0 bytes.

> I don't see how the old ioctl can possibly have been
> used before so there isn't a compatibility problem.

The code uses SNDRV_SB_CSP_MAX_MICROCODE_FILE_SIZE but doesn't care what
the size field of the ioctl code is, so we could use any random value on
those architectures.

> Or you could entirely sidestep the problem and use request_firmware()
> but I guess that's more effort than you want to invest.

The driver already implements this for a bunch of predefined CSP code
blobs.  I'm not sure whether anybody has ever loaded additional .csp
files.


Regards,
Clemens
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