Re: [PATCH 2/4 v8] i.MX31: Image Processing Unit DMA and IRQ drivers

[Guennadi Liakhovetski <g.liakhovetski@gmx.de>]

On Thu, 22 Jan 2009, Valentin Longchamp wrote:

> Hi Guennadi,
> 
> I wanted to test this driver on my board. However it does not work for
> me. I have pulled the version that is on async-tx tree so it should be
> up to date and it compiles fine.
> 
> Unfortunately the fb driver cannot register because it cannot request a
> dma channel (there are no dma registered in dmaengive, the list is
> empty). This is because the ipu-core platform_driver is never
> registered. This is supposed to be done thanks to the
> subsys_initcall(ipu_init) as we can see it in the patch (which is then
> going to be linked with the ipu-core device that is registered witth the
> other mx3 device). I never happen to see one of the ipu_probe messages
> (even for failure) with dynamic_printk enabled.

You need the patch 4/4 - platform bindings, which is not in that queue and 
will only be merged in the next kernel version. You can so far pick it up 
here:

http://marc.info/?l=linux-arm-kernel&m=123143901514438&w=2

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer

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