linux-kernel - Re: Kernel almost hangs when CONFIG_DRM

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Date:	Mon, 29 Aug 2011 07:49:26 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Pavel Ivanov <paivanof@...il.com>
Cc:	Michel Dänzer <michel@...nzer.net>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Kernel almost hangs when CONFIG_DRM_RADEON=y

On Sun, Aug 28, 2011 at 05:47:59PM -0400, Pavel Ivanov wrote:
> On Sun, Aug 28, 2011 at 1:36 AM, Borislav Petkov <bp@...en8.de> wrote:
> >> > With CONFIG_DRM_RADEON=y, the microcode is needed before it can be
> >> > loaded from userspace, so it needs to be built into the kernel as well.
> >>
> >> How should I do that? I've tried to set all "m"s to "y" in .config and
> >> still saw this issue. Should I set some special parameter?
> >
> > You need to add "radeon/CEDAR_pfp.bin" to CONFIG_EXTRA_FIRMWARE when you
> > configure your kernel and enable CONFIG_FIRMWARE_IN_KERNEL.
> >
> > The radeon/CEDAR_pfp.bin file (+ leading directory, mind you) should
> > most probably be located in /lib/firmware or to whatever you have set
> > CONFIG_EXTRA_FIRMWARE_DIR so that Kbuild can find it (if not, you'll get
> > a warning at the end of the kernel build). This way, it works for both
> > radeon being =m and =y.
> 
> Everything else in /lib/firmware/radeon is needed after user space
> become available?

You mean the other *.bin files? If so, not for your case, AFAICT - your
driver is requesting CEDAR_pfp.bin only, correct? But I mean, it won't
hurt if you leave them all there, they're under 1M.

You should recheck and add any other .bin files to the
CONFIG_EXTRA_FIRMWARE string so that radeon.ko is satisfied :).

HTH.

-- 
Regards/Gruss,
    Boris.
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