linux-kernel - Re: Kernel almost hangs when CONFIG_DRM

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Date:	Mon, 29 Aug 2011 08:04:04 +0200
From:	Michel Dänzer <michel@...nzer.net>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Pavel Ivanov <paivanof@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: Re: Kernel almost hangs when CONFIG_DRM_RADEON=y

On Mon, 2011-08-29 at 07:49 +0200, Borislav Petkov wrote: 
> 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?

It'll need all the CEDAR_*.bin files.


-- 
Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer
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