On 2015-06-24 8:03 AM, Chen, Simon wrote:
Hi Bruce,
Thanks for the response. I was able to get this running by creating a .bbappend to the kernel
recipe and link a .cfg to change the kernel configurations, and it worked! I see what you're saying
though. When doing the menuconfig, I would probably have to do a separate "$bitbake
kernel-modules" before I do a "$bitbake linux-yocto" or whatever core-image I'm
My wiggle answer is "it depends", that's why I was wondering how you
built them ? You can't bitbake kernel-modules, since it is a package not
a recipe, but the concept is the same. You need to go through the
compile_kernel_modules task, and have the package splits happen (the
dynamically created per kernel module class, and then the updates to the
meta package).
using? However, I believe the use of a .cfg means that the Yocto environment
is smart enough to update and auto-build the kernel-modules meta package... is
that correct?
This is the solution I would have recommended. The fragment is pulled into
the main build of the kernel, so that configuration is available during the
first pass through the build. As a result, your new configuration (and
modules)
are pulled in like any of the options and modules that were part of the
BSP.
Cheers,
Bruce
-Simon
-----Original Message-----
From: Bruce Ashfield [mailto:bruce.ashfi...@windriver.com]
Sent: Tuesday, June 23, 2015 4:17 PM
To: Chen, Simon; linux-yocto@yoctoproject.org
Subject: EXTERNAL: Re: [linux-yocto] Missing Kernel Modules (GPU folder and
radeon.ko)
On 2015-06-23 11:27 AM, Chen, Simon wrote:
Hi all,
I am trying to integrate the AMD Radeon E8860 graphics card on to a
Yocto (poky-dizzy-12.0.1) embedded machine. Ialready have the open
source xf86-video-ati driver (7.4.0) installed into my Yocto image.
The problem is that the kernel module radeon.ko, and all of its
dependencies under the GPU and I2C folders seems to be missing from the kernel.
Without these .ko files, Yocto cannot recognize the external graphics
card, and udev cannot generate an appropriate device node
(/dev/dri/card0) for Xorg to use.
I've already tried adding the following line to my local.conf:
CORE_IMAGE_EXTRA_INSTALL_append = "kernel-modules"
How are you invoking the rebuild of the kernel modules after you've added them
via menuconfig ?
kernel-modules is a meta package that has embedded RDEPENDS on individual
kernel module packages. If you are rebuilding the kernel, but not re-building
and repacking the kernel modules then any additions won't be in the RDEPENDS
and hence won't make it to the image.
Bruce
This populates the file system with .ko's but none seem to be the ones
I need for my graphics card to run, which are radeon.ko, drm.ko,
drm_kms_helper.ko, ttm.ko, and i2c_algo_bit.ko. I am missing the
entire lib/modules/<KERNEL_VERSION>/kernel/drivers/gpu folder and also
most of the contents in lib/modules/<KERNEL_VERSION/kernel/drivers/i2c.
I wondered if it was just a matter of implementing the .config file
correctly. But I've already executed "$bitbake linux-yocto -c menconfig"
and enabled the appropriate configuration flags for each of these
modules. Perhaps this just a matter of appending to the kernel.bbclass
file which is responsible for executing the kernel Makefiles, and
building these .ko's?
Can you guys please check your own lib/modules/<KERNEL_VERSION>/kernel
directory to see that these .ko's exist? I'd like to know if there is
something else that isn't enabled or included into the build, or if
it's something I need to hardcode in order to fix this issue.
Thanks,
Simon
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