linux-kernel - Re: [PATCH] i915: make vbl interrupts work properly on i965g/gm

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Date:	Fri, 28 Sep 2007 13:07:55 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Roland Dreier <rdreier@...co.com>
Cc:	Dave Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i915: make vbl interrupts work properly on i965g/gm

On Friday, September 28, 2007 1:02 pm Roland Dreier wrote:
> Sorry to hijack this thread, but I have a question about i915
> interrupts (945GM specifically) that I haven't gotten an answer to
> yet, and this thread reminded me of it so I thought I'd ask again:
> I hacked the kernel drm stuff on my laptop with 945GM graphics to do
> pci_enable_msi() on the graphics device, and I don't see any
> interrupts occur.
>
> So can someone with access to details of the 945GM tell me if MSI
> interrupts should work, and if so if there's some internal registers
> that need to be poked to enable it (beyond what pci_enable_msi()
> does).
>
> It's not super-urgent-- I just like using shiny things like MSI, and
> I already have ahci, iwl3945 and e1000 working with MSI on my laptop,
> so the graphics are the only thing left with an MSI capability that's
> not working.

I don't have a 945 to test with, but Dave might...

Jesse
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