Hi,
I hope someone might be able to help me. I have built a working linux kernel for the at91sam9263ek using buildroot. This is kernel version 2.6.22 with additional atmel patches.
I have then cross-compiled a package called ffmpeg, which, indirectly, uses directfb.
I want to run an application called ffplay to write the the framebuffer. However, when I run it, I get an error (see output below).
Code:
FFplay version SVN-r13835, Copyright (c) 2003-2008 Fabrice Bellard, et al.
configuration: --enable-cross-compile --cross-prefix=/home/richardh/AT91SAM9263/buildroot/build_arm/staging_dir/usr/bin/arm-linux- --prefix=/usr --arch=armv4l --disable-mmx --enable-shared
libavutil version: 49.7.0
libavcodec version: 51.57.2
libavformat version: 52.16.0
libavdevice version: 52.0.0
built on Jul 8 2008 09:58:00, gcc: 4.2.1
=======================| DirectFB 1.0.1 |=======================
(c) 2001-2007 The DirectFB Organization (directfb.org)
(c) 2000-2004 Convergence (integrated media) GmbH
------------------------------------------------------------
(*) DirectFB/Core: Single Application Core. (2008-05-13 21:08)
(!) Direct/Util: opening '/dev/fb0' failed
--> No such device
(!) DirectFB/FBDev: Error opening framebuffer device!
(!) DirectFB/FBDev: Use 'fbdev' option or set FRAMEBUFFER environment variable.
(!) DirectFB/Core: Could not initialize 'system' core!
--> Initialization error!
Could not initialize SDL - DirectFBCreate: Initialization error!
As shown above, it seems that the /dev/fb0 device cannot be opened. My question is why?
The /dev/fb0 file exists, and I think that I have selected all of the correct kernel options necessary when building the kernel.
I have also read elsewhere to check in the /proc directory, but I cannot see anything fb related in that directory.
Can anyone tell me if there is any other framebuffer configuration that is necessary to use the /dev/fb0 device (e.g. boot args?), or if not, what the problem could possibly be?
I don't have any previous experience of framebuffers, so I am walking around in the dark at the moment.
Thanks in advance,
Richard.
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