From: Mark Brown <broonie@kernel.org>
To: Grant Likely <grant.likely@secretlab.ca>
Cc: Thierry Reding <thierry.reding@gmail.com>,
"linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>,
Will Deacon <will.deacon@arm.com>,
Doug Anderson <dianders@chromium.org>,
Tomasz Figa <tomasz.figa@gmail.com>,
"kgene.kim@samsung.com" <kgene.kim@samsung.com>,
Olof Johansson <olof@lixom.net>,
Prashanth G <prashanth.g@samsung.com>,
Javier Martinez Canillas <javier.martinez@collabora.co.uk>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"rahul.sharma@samsung.com" <rahul.sharma@samsung.com>
Subject: Re: Unable to boot mainline on snow chromebook since 3.15
Date: Mon, 29 Sep 2014 17:37:57 +0100 [thread overview]
Message-ID: <20140929163757.GU16977@sirena.org.uk> (raw)
In-Reply-To: <CACxGe6uDYNOuhgM_5iQTp=iB4X-osSz8WESiUb2QGj5ZmWFp-A@mail.gmail.com>
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On Mon, Sep 29, 2014 at 02:12:43PM +0100, Grant Likely wrote:
> On Mon, Sep 29, 2014 at 1:57 PM, Thierry Reding
> > Though there are two cases: one is to use simplefb as a means to have
> > early boot messages on a graphical display (and optionally hand off to a
> > real driver). The other is to use simplefb as the only framebuffer
> > driver until a proper driver has been implemented. The latter would have
> > the disadvantage of not allowing unused resources from being garbage
> > collected at all. Then again, I don't think power consumption is going
> > to be a very big issue on hardware where no proper display driver is
> > available.
> When simplefb is the only framebuffer to get a platform working, it is
> reasonable to have a placeholder driver that grabs the resources and
> nothing else. When a real driver is implemented, and merged, the
> placeholder driver should drop compatibility with the device node at
> the same time.
I'd thought there was some objection to doing this? It does seem like a
sensible approach.
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From: broonie@kernel.org (Mark Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: Unable to boot mainline on snow chromebook since 3.15
Date: Mon, 29 Sep 2014 17:37:57 +0100 [thread overview]
Message-ID: <20140929163757.GU16977@sirena.org.uk> (raw)
In-Reply-To: <CACxGe6uDYNOuhgM_5iQTp=iB4X-osSz8WESiUb2QGj5ZmWFp-A@mail.gmail.com>
On Mon, Sep 29, 2014 at 02:12:43PM +0100, Grant Likely wrote:
> On Mon, Sep 29, 2014 at 1:57 PM, Thierry Reding
> > Though there are two cases: one is to use simplefb as a means to have
> > early boot messages on a graphical display (and optionally hand off to a
> > real driver). The other is to use simplefb as the only framebuffer
> > driver until a proper driver has been implemented. The latter would have
> > the disadvantage of not allowing unused resources from being garbage
> > collected at all. Then again, I don't think power consumption is going
> > to be a very big issue on hardware where no proper display driver is
> > available.
> When simplefb is the only framebuffer to get a platform working, it is
> reasonable to have a placeholder driver that grabs the resources and
> nothing else. When a real driver is implemented, and merged, the
> placeholder driver should drop compatibility with the device node at
> the same time.
I'd thought there was some objection to doing this? It does seem like a
sensible approach.
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next prev parent reply other threads:[~2014-09-29 16:38 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-05 11:57 Unable to boot mainline on snow chromebook since 3.15 Will Deacon
2014-09-05 12:22 ` Will Deacon
2014-09-05 12:22 ` Will Deacon
2014-09-05 13:46 ` Ajay kumar
2014-09-05 13:46 ` Ajay kumar
2014-09-05 13:56 ` Vivek Gautam
2014-09-05 13:56 ` Vivek Gautam
2014-09-08 11:17 ` Will Deacon
2014-09-08 11:17 ` Will Deacon
2014-09-05 14:12 ` Marc Zyngier
2014-09-05 14:12 ` Marc Zyngier
2014-09-05 20:25 ` Doug Anderson
2014-09-05 20:25 ` Doug Anderson
2014-09-07 9:06 ` Javier Martinez Canillas
2014-09-07 9:06 ` Javier Martinez Canillas
2014-09-07 15:01 ` Mark Brown
2014-09-07 15:01 ` Mark Brown
2014-09-07 15:51 ` Javier Martinez Canillas
2014-09-07 15:51 ` Javier Martinez Canillas
2014-09-07 15:52 ` Tomasz Figa
2014-09-07 15:52 ` Tomasz Figa
2014-09-07 16:12 ` Javier Martinez Canillas
2014-09-07 16:12 ` Javier Martinez Canillas
2014-09-07 16:19 ` Tomasz Figa
2014-09-07 16:19 ` Tomasz Figa
2014-09-07 16:40 ` Javier Martinez Canillas
2014-09-07 16:40 ` Javier Martinez Canillas
2014-09-08 11:21 ` Will Deacon
2014-09-08 11:21 ` Will Deacon
2014-09-08 11:55 ` Javier Martinez Canillas
2014-09-08 11:55 ` Javier Martinez Canillas
2014-09-08 12:46 ` Will Deacon
2014-09-08 12:46 ` Will Deacon
2014-09-08 12:20 ` Grant Likely
2014-09-08 12:20 ` Grant Likely
2014-09-08 13:49 ` Mark Brown
2014-09-08 13:49 ` Mark Brown
2014-09-08 14:05 ` Javier Martinez Canillas
2014-09-08 14:05 ` Javier Martinez Canillas
2014-09-10 11:17 ` Will Deacon
2014-09-10 11:17 ` Will Deacon
2014-09-10 16:03 ` Doug Anderson
2014-09-10 16:03 ` Doug Anderson
2014-09-10 16:23 ` Will Deacon
2014-09-10 16:23 ` Will Deacon
2014-09-08 15:58 ` Doug Anderson
2014-09-08 15:58 ` Doug Anderson
2014-09-08 19:40 ` Grant Likely
2014-09-08 19:40 ` Grant Likely
2014-09-10 13:06 ` Olof Johansson
2014-09-10 13:06 ` Olof Johansson
2014-09-10 14:31 ` Mark Brown
2014-09-10 14:31 ` Mark Brown
2014-09-10 14:56 ` Grant Likely
2014-09-10 14:56 ` Grant Likely
2014-09-10 15:39 ` Mark Brown
2014-09-10 15:39 ` Mark Brown
2014-09-10 16:29 ` Grant Likely
2014-09-10 16:29 ` Grant Likely
2014-09-10 16:45 ` Doug Anderson
2014-09-10 16:45 ` Doug Anderson
2014-09-10 19:45 ` Mark Brown
2014-09-10 19:45 ` Mark Brown
2014-09-10 19:51 ` Doug Anderson
2014-09-10 19:51 ` Doug Anderson
2014-09-10 16:57 ` Mark Brown
2014-09-10 16:57 ` Mark Brown
2014-09-11 9:22 ` Grant Likely
2014-09-11 9:22 ` Grant Likely
2014-09-11 18:03 ` Mark Brown
2014-09-11 18:03 ` Mark Brown
2014-09-11 22:54 ` Doug Anderson
2014-09-11 22:54 ` Doug Anderson
2014-09-29 12:57 ` Thierry Reding
2014-09-29 12:57 ` Thierry Reding
2014-09-29 13:12 ` Grant Likely
2014-09-29 13:12 ` Grant Likely
2014-09-29 16:37 ` Mark Brown [this message]
2014-09-29 16:37 ` Mark Brown
2014-09-30 6:12 ` Thierry Reding
2014-09-30 6:12 ` Thierry Reding
2014-09-29 20:46 ` Maxime Ripard
2014-09-29 20:46 ` Maxime Ripard
2014-09-10 16:36 ` Olof Johansson
2014-09-10 16:36 ` Olof Johansson
2014-09-10 18:17 ` Mark Brown
2014-09-10 18:17 ` Mark Brown
2014-09-11 9:06 ` Grant Likely
2014-09-11 9:06 ` Grant Likely
2014-09-11 16:16 ` Mark Brown
2014-09-11 16:16 ` Mark Brown
2014-09-08 4:36 ` Doug Anderson
2014-09-08 4:36 ` Doug Anderson
2014-09-08 6:09 ` Javier Martinez Canillas
2014-09-08 6:09 ` Javier Martinez Canillas
2014-09-08 15:55 ` Doug Anderson
2014-09-08 15:55 ` Doug Anderson
2014-09-08 16:07 ` Will Deacon
2014-09-08 16:07 ` Will Deacon
2014-09-08 16:12 ` Doug Anderson
2014-09-08 16:12 ` Doug Anderson
2014-09-08 10:20 ` Mark Brown
2014-09-08 10:20 ` Mark Brown
2014-09-08 4:43 ` Doug Anderson
2014-09-08 4:43 ` Doug Anderson
2015-01-30 4:56 bruce m beach
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