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From: Greg KH <greg@kroah.com>
To: Dave Airlie <airlied@gmail.com>
Cc: airlied@linux.ie, linux-kernel@vger.kernel.org
Subject: Re: gpu sharing layer for kernel
Date: Thu, 25 Jan 2007 14:06:31 -0800	[thread overview]
Message-ID: <20070125220631.GB5886@kroah.com> (raw)
In-Reply-To: <21d7e9970701241439y1431254bwf088f9f3043dd0c@mail.gmail.com>

On Thu, Jan 25, 2007 at 09:39:47AM +1100, Dave Airlie wrote:
> >> Why do we want this?
> >>
> >> Currently the kernel cannot provide both the fb and drm drivers with
> >> access to the device model and this means the drm cannot get any
> >> suspend/resume callbacks.  This layer attempts to fix this problem by
> >> adding a bus for the gpu drivers to attach to. Currently a lowlevel
> >> binding driver is needed along with optional fb and drm components.
> >
> >If we were to allow this kind of "sharing" for all PCI devices would
> >that work out instead?  Or would this layer still be needed?
> 
> Initially this layer wouldn't be needed, but I'd like to add some
> awareness to the drivers, so the drm can tell the fb to stop doing
> stuff and vice-versa if necessary....  but perhaps that could be done
> with a generic layer also.. or via the lowlevel driver I have...

Ok, I have no objection to this layer right now, as it solves your
problem, and while I would like some time in the future to add such a
layer for the PCI devices, it is no where on my todo plate just yet...

thanks,

greg k-h

  reply	other threads:[~2007-01-25 22:07 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-24 11:20 airlied
2007-01-24 11:20 ` [PATCH] gpu: Initial gpu layer addition airlied
2007-01-24 11:20   ` [PATCH] gpu/radeon: add a radeon lowlevel GPU driver airlied
2007-01-24 11:20     ` [PATCH] gpu/radeonfb: add GPU support to radeonfb airlied
2007-01-24 11:20       ` [PATCH] gpu/drm: Add GPU layer support to generic DRM airlied
2007-01-24 11:20         ` [PATCH] drm/gpu/radeon: Add radeon DRM support to use GPU layer airlied
2007-01-25  0:07       ` [PATCH] gpu/radeonfb: add GPU support to radeonfb Benjamin Herrenschmidt
2007-01-30 19:50         ` Dave Airlie
2007-01-24 21:46 ` gpu sharing layer for kernel Greg KH
2007-01-24 22:39   ` Dave Airlie
2007-01-25 22:06     ` Greg KH [this message]
2007-01-28 21:16       ` Dave Jones
2007-02-07 18:42     ` James Simmons
2007-02-06 19:40   ` James Simmons
2007-01-25  7:56 ` Paul Collins
2007-01-30 19:49   ` Dave Airlie

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