[Intel-gfx] [PATCH] drm/i915: Make sure PORT_HOTPLUG_EN is written

[Egbert Eich]

Chris Wilson writes:
 > On Fri, Jul 26, 2013 at 12:31:30PM +0200, Egbert Eich wrote:
 > > Add posting read to make sure PORT_HOTPLUG_EN is written in
 > > i915_hpd_irq_setup().
 > 
 > It's not vital that the write be flushed here. On the deferred reenable
 > path a further delay in rearming is not significant, and inside the irq
 > handler (for disabling) the write will be flushed.
 > 
 > In terms of the patch itself, you would also need to fixup
 > ibx_hpd_irq_setup as well.
 > -Chris

We can probably drop this patch. It was one try figuring why HPD interrupts
are still seeen on pins which have been disabled. It turned out that the
root cause was a mixup in the mapping of pins to enable bits due to incorrect
documentation.

Cheers,
	Egbert.