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Date: Wed, 20 Apr 2011 15:51:39 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] [Xenomai-core] xenomai and framebuffer-ipu on
 target iMx35
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To: =?UTF-8?B?RnJhbsOnb2lzIEJlYXVmb3J0?= <francois.beaufort@domain.hid>
Cc: xenomai@xenomai.org

Fran=C3=A7ois Beaufort wrote:
>=20
>=20
>> Date: Wed, 20 Apr 2011 12:54:00 +0200
>> From: gilles.chanteperdrix@xenomai.org
>> To: francois.beaufort@domain.hid
>> CC: xenomai@xenomai.org
>> Subject: Re: [Xenomai-core] xenomai and framebuffer-ipu on target iMx3=
5
>>
>> Fran=C3=A7ois Beaufort wrote:
>>> I can't show you  /proc/interrupts when ipu and I-pipe are enabled
>>> because the system doesn't start in this case.
>> Ok. I failed to get that from your first mail. I do not know either if=

>> you are using a vanilla kernel, or a patched one?
>>
>> If a patched one, then you have to verify that generic_handle_irq is
>> replaced with ipipe_handle_chained_irq for multiplexed GPIO irqs.
>>
>> Note that I CCd the Xenomai-help mailing list, next private mail will
>> receive no answer.
>>
>> --=20
>>                                                                 Gilles=
=2E
>>
>=20
> Thank you for your answers.
>=20
> I can now start Linux-xenomai with framebuffer and ipu.
>=20
> I use a kernel patched by the Phytec BSP patches and next by the adeos =
pipe.
>=20
> I have modified the file linux-2.6.35.9/drivers/dma/ipu/ipu_irq.c :
>=20
> lines 305 and 343 :
>=20
> -  generic_handle_irq(irq);
> + ipipe_handle_chained_irq(irq);
>=20
>=20
> This file is not modified by any patch.

You have to replace any call to generic_handle_irq in the Phytec patch
by a call to ipipe_handle_chained_irq, otherwise, you will get this
issue again with other multiplexed irqs.

--=20
					    Gilles.