Re: MPC5121e, MBX driver, pvr.ko ...

On Friday 06 February 2009 20:17:10 Wolfgang Denk wrote:

Dear David,

In message [ref] you wrote:

quoted

I decided to try out Application Note AN3793 from Freescale (3D Graphics
on the ADS512101 Board Using OpenGL ES).

I started trying to load the provided (binary!) kernel modules into our
kernel, but I am geeting errors inserting the modules using

The binary kernel modules are a mess. Not  only  they  are  a  pretty
clear  GPL license violation (and I wonder what Freescale is going to
do to sort this out), but it effectively always locks you down to the

Sorry if this starts to get a little off-topic to this list...
IANAL, so I won't argue about a binary-driver being by definition a 
GPL-violation or not, or if those "gray areas" that Linus mentioned in the 
past, apply in this case.
Besides that, do you have another reason why this is a clear GPL-violation?

specific LTIB kernel version (and probably even to  a  specific  DTS)
they were built against. Open source? Forget it.

I never expected this driver to be Open-Source. I always supposed that we'd 
never be able to use the MBX because of this, and use the AXE instead (One of 
our applications needs some form of hardware accelerated image-scaling). But 
since I saw that application note, I couldn't resist trying it out, just to 
see how hard it is to actually use it. The point is made: Leaving aside the 
possible legal implications of the driver's existance, it still is an 
undoable job to get this working in a maintainable fashion.
What could Freescale possibly do about this?... beats me. I don't know about 
the legal implications (again, IANAL), but what if there was a driver like 
NVidia's video drivers (i.e. binary object with a re-compileable shell around 
it to adapt it to other kernels)? Otherwise, I guess Freescale can just as 
well stop making the MPC5121e and just make MPC5123's instead (which 
continues to be an awesome chip nevertheless) :-)

Best regards,

-- 
David Jander
Protonic Holland.