linux-kernel - Re: [PATCH 1/1] video: ARM CLCD: Add the framebuffer parameters setting in probe

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Date:	Sat, 2 Jan 2016 12:39:19 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Rongjun Ying <rjying@...yun.com>
Cc:	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] video: ARM CLCD: Add the framebuffer parameters
 setting in probe

On Wed, Dec 30, 2015 at 08:38:48AM +0800, Rongjun Ying wrote:
> This patch fixes the user space applications can't get the framebuffer
> parameters, if disable the fb console feature.
> 
> Signed-off-by: Rongjun Ying <rjying@...yun.com>

I think this behaviour is intentional: userspace is expected to
set the initial mode for non-console frame buffers by using
FBIOPUT_VSCREENINFO.

Otherwise, register_fb() would always set an initial mode on all
framebuffers.

I remember this being discussed years ago (more than a decade)
when the FB layer was relatively new.

-- 
RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/
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