From: "Michel Dänzer" <michel@daenzer.net>
To: James Simmons <jsimmons@infradead.org>
Cc: Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
Paulius Zaleckas <paulius.zaleckas@gmail.com>,
Michal Suchanek <hramrach@centrum.cz>,
Alex Deucher <alexdeucher@gmail.com>,
DRI development list <dri-devel@lists.sourceforge.net>
Subject: Re: [Linux-fbdev-devel] drm_fb_helper: Impossible to change video
Date: Tue, 16 Mar 2010 14:00:32 +0000 [thread overview]
Message-ID: <1268748032.4176.56.camel@thor.local> (raw)
In-Reply-To: <alpine.LFD.2.00.1003161353200.14714@casper.infradead.org>
On Tue, 2010-03-16 at 13:56 +0000, James Simmons wrote:
> > > The fb_ops can only be called from fbcon or the fbdev userland interface.
> > > The fbcon calls should only happen when the VC is in KD_TEXT mode. Now
> > > with the DRM backend we have the advantage of creating a mapping seperate
> > > from the console mapping. A fb_open/fb_close could be used to cleaning up
> > > the userland mmap as well as handle the console pinning. We can supply
> > > your own fb_mmap hook.
> >
> > Again, the issue is not userspace but that fb_ops hooks can be called
> > from interrupt context etc.
>
> This should not happen. The VT layer is protected from calling in the
> interrupt context. TNor does fbcon call any fb_ops methods from a irq.
E.g. printk?
--
Earthling Michel Dänzer | http://www.vmware.com
Libre software enthusiast | Debian, X and DRI developer
next prev parent reply other threads:[~2010-03-16 14:00 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-20 13:16 [Linux-fbdev-devel] drm_fb_helper: Impossible to change video mode Paulius Zaleckas
2009-11-20 15:55 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video Clemens Ladisch
2009-11-20 18:53 ` James Simmons
2009-11-20 19:05 ` Andrew Morton
2009-11-20 19:39 ` Paulius Zaleckas
2009-11-20 20:01 ` James Simmons
2009-11-20 20:13 ` Paulius Zaleckas
2009-11-20 20:48 ` James Simmons
2009-11-21 4:25 ` Dave Airlie
2009-11-21 4:27 ` Dave Airlie
2010-03-01 9:18 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video mode Michal Suchanek
2010-03-03 5:02 ` Dave Airlie
2010-03-03 8:23 ` Michal Suchanek
2010-03-03 9:23 ` Dave Airlie
2010-03-03 10:32 ` Michal Suchanek
2010-03-10 18:11 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video James Simmons
2010-03-10 21:04 ` Ville Syrjälä
2010-03-10 21:16 ` Michal Suchanek
2010-03-11 2:24 ` James Simmons
2010-03-11 2:22 ` James Simmons
2010-03-11 5:03 ` Ville Syrjälä
2010-03-10 18:04 ` James Simmons
2010-03-10 17:42 ` James Simmons
2010-03-10 18:05 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video mode Alex Deucher
2010-03-10 18:10 ` Alex Deucher
2010-03-10 18:47 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video James Simmons
2010-03-10 19:49 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video mode Michal Suchanek
2010-03-10 20:06 ` Alex Deucher
2010-03-11 10:13 ` Michel Dänzer
2010-03-11 10:31 ` Pauli Nieminen
2010-03-11 15:12 ` Alex Deucher
2010-03-11 15:17 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video James Simmons
2010-03-11 15:47 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video mode Michal Suchanek
2010-03-12 14:52 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video James Simmons
2010-03-12 20:51 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video mode Dave Airlie
2010-03-13 14:40 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video James Simmons
2010-03-13 21:01 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video mode Dave Airlie
2010-03-14 11:41 ` Michel Dänzer
2010-03-15 18:38 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video James Simmons
2010-03-16 13:46 ` Michel Dänzer
2010-03-16 13:56 ` James Simmons
2010-03-16 14:00 ` Michel Dänzer [this message]
2010-03-25 12:30 ` James Simmons
2010-03-15 18:22 ` James Simmons
2010-03-10 20:58 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video mode Michal Suchanek
2010-03-11 3:41 ` [Linux-fbdev-devel] drm_fb_helper: Impossible to change video James Simmons
2010-03-10 17:35 ` James Simmons
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