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

[Chris Wilson]

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

-- 
Chris Wilson, Intel Open Source Technology Centre