From: Bill Gatliff <bgat@billgatliff.com>
To: David VomLehn <dvomlehn@cisco.com>
Cc: Robert Schwebel <r.schwebel@pengutronix.de>,
linux-embedded@vger.kernel.org,
Juergen Beisert <jbe@pengutronix.de>,
Sascha Hauer <sha@pengutronix.de>,
Wolfram Sang <wsa@pengutronix.de>
Subject: Re: flicker free booting
Date: Fri, 31 Jul 2009 13:46:31 -0500 [thread overview]
Message-ID: <4A733C07.3050002@billgatliff.com> (raw)
In-Reply-To: <20090731180309.GA17314@cuplxvomd02.corp.sa.net>
David VomLehn wrote:
> This is an issue that I think is common to many embedded platforms, but I'm
> not sure this is the solution. (I'm not sure it's *not* the solution, either).
> The question I've been looking at is: do sub-second boot times make all this
> a moot point? After all, if you can bring up your graphics driver in a fraction
> of a second and use *it* to display a splash screen, it seems like it would
> meet your need to give almost immediate feedback to users that the system is
> alive.
>
Those fractions-of-seconds boot times are beyond the reach of the 200
MHz-class ARM9 processors and similar, where it takes two or three
seconds just to load and uncompress the kernel from NOR or NAND flash.
And add a second or so on top of that to zeroinit the graphics
framebuffer, if your display is of any decent size and depth.
b.g.
--
Bill Gatliff
bgat@billgatliff.com
next prev parent reply other threads:[~2009-07-31 18:46 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-02 15:22 Representing Embedded Architectures at the Kernel Summit James Bottomley
2009-06-02 17:29 ` Josh Boyer
2009-06-02 17:42 ` James Bottomley
2009-06-02 17:52 ` David VomLehn
2009-06-02 18:25 ` James Bottomley
2009-06-02 18:51 ` Josh Boyer
2009-06-02 19:30 ` Tim Bird
2009-06-02 20:37 ` [Ksummit-2009-discuss] " James Bottomley
2009-06-02 20:44 ` Bill Gatliff
2009-06-02 21:34 ` Robert Schwebel
2009-06-03 3:35 ` Greg KH
[not found] ` <20090731152617.GW29245@pengutronix.de>
2009-07-31 15:53 ` flicker free booting Robert Schwebel
2009-07-31 18:03 ` David VomLehn
2009-07-31 18:09 ` Robert Schwebel
2009-07-31 18:42 ` Bill Gatliff
2009-08-03 8:19 ` Sascha Hauer
2009-08-03 8:37 ` Geert Uytterhoeven
2009-07-31 18:46 ` Bill Gatliff [this message]
2009-07-31 19:48 ` Tim Bird
2009-07-31 19:51 ` Bill Gatliff
2009-07-31 20:05 ` Robert Schwebel
2009-08-01 1:26 ` Tim Bird
2009-07-31 19:25 ` Bill Gatliff
2009-08-01 14:25 ` Jamie Lokier
2009-06-03 0:03 ` [Ksummit-2009-discuss] Representing Embedded Architectures at the Kernel Summit David VomLehn
2009-06-03 0:52 ` Eric W. Biederman
2009-06-03 1:42 ` Steven Rostedt
2009-06-02 22:21 ` Jean-Christophe PLAGNIOL-VILLARD
2009-06-03 6:24 ` [Ksummit-2009-discuss] " Ralf Baechle
2009-06-10 23:13 ` Kumar Gala
2009-06-14 3:48 ` Grant Likely
2009-06-10 23:08 ` Kumar Gala
2009-06-02 17:29 ` Grant Likely
2009-06-02 17:45 ` David VomLehn
2009-06-02 18:46 ` Grant Likely
2009-06-02 17:48 ` James Bottomley
2009-06-03 12:17 ` Mark Brown
2009-06-04 18:18 ` Grant Likely
2009-06-02 21:10 ` Russell King
2009-06-02 21:16 ` Bill Gatliff
2009-06-02 21:16 ` Bill Gatliff
2009-06-02 21:16 ` Bill Gatliff
2009-06-04 20:15 ` Grant Likely
2009-06-02 21:18 ` Geert Uytterhoeven
2009-06-02 21:18 ` Geert Uytterhoeven
2009-06-02 21:18 ` Geert Uytterhoeven
2009-06-03 7:07 ` [Ksummit-2009-discuss] " Ralf Baechle
2009-06-02 21:40 ` Robert Schwebel
2009-06-02 21:40 ` Robert Schwebel
2009-06-02 21:48 ` Russell King
2009-06-02 21:40 ` Robert Schwebel
2009-06-04 20:08 ` Grant Likely
2009-06-04 20:08 ` Grant Likely
2009-06-04 20:08 ` Grant Likely
[not found] ` <3340601010994331832@unknownmsgid>
2009-06-04 20:24 ` Grant Likely
2009-06-03 6:53 ` [Ksummit-2009-discuss] " Ralf Baechle
2009-06-03 13:04 ` Catalin Marinas
2009-06-03 13:18 ` Josh Boyer
2009-06-03 13:45 ` Catalin Marinas
2009-06-03 14:11 ` Josh Boyer
2009-06-03 14:06 ` Jean-Christophe PLAGNIOL-VILLARD
2009-06-03 16:19 ` James Bottomley
2009-06-03 17:09 ` Russell King
2009-06-03 18:43 ` Andrew Morton
2009-06-03 19:01 ` James Bottomley
2009-06-04 3:11 ` David VomLehn (dvomlehn)
2009-06-04 3:24 ` Mike Frysinger
2009-06-04 3:24 ` Mike Frysinger
2009-06-04 9:23 ` Mel Gorman
2009-06-03 19:08 ` Catalin Marinas
2009-06-10 9:42 ` Thomas Petazzoni
2009-06-16 6:42 ` Mike Rapoport
2009-06-16 8:06 ` Mike Frysinger
2009-06-16 8:06 ` Mike Frysinger
2009-06-16 12:19 ` [Ksummit-2009-discuss] " Ralf Baechle
2009-06-17 4:26 ` H. Peter Anvin
2009-06-17 15:04 ` Ralf Baechle
2009-06-17 17:14 ` H. Peter Anvin
2009-06-16 16:06 ` Grant Likely
2009-06-16 18:18 ` Jamie Lokier
2009-06-16 19:28 ` Grant Likely
2009-06-16 20:07 ` Jamie Lokier
2009-06-16 20:10 ` Marcel Holtmann
2009-06-16 21:04 ` Grant Likely
2009-06-18 3:05 ` Paul Mundt
2009-06-17 14:31 ` Kumar Gala
2009-06-18 2:51 ` Paul Mundt
2009-06-19 2:59 ` Kumar Gala
2009-06-19 3:00 ` Paul Mundt
2009-06-19 7:53 ` Kumar Gala
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