Re: i915_driver_irq_handler: irq 42: nobody cared

From: Jiri Slaby
Date: Fri Mar 30 2012 - 08:11:56 EST

On 03/30/2012 12:45 PM, Chris Wilson wrote:
> On Fri, 30 Mar 2012 11:59:28 +0200, Jiri Slaby <jslaby@xxxxxxx> wrote:
>> I don't know what to dump more, because iir is obviously zero too. What
>> other sources of interrupts are on the (G33) chip?
> IIR is the master interrupt, with chained secondary interrupt statuses.
> If IIR is 0, the interrupt wasn't raised by the GPU.

This does not make sense, the handler does something different. Even if
IIR is 0, it still takes a look at pipe stats.

And this is MSI, so there can be no other source of the interrupt.
(Except broken IRQ routing.) I may try to boot with MSIs off if you
think it's important.

-- js suse labs

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