drm/i915: Include more information in disabled hotplug interrupt warning

Daniel thought that this was an opportune moment to include which pins
and bits ended up being stuck in the WARN.

Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_irq.c

@@ -1235,7 +1235,8 @@ static inline void intel_hpd_irq_handler(struct drm_device *dev,
 
 		WARN_ONCE(hpd[i] & hotplug_trigger &&
 			  dev_priv->hpd_stats[i].hpd_mark == HPD_DISABLED,
-			  "Received HPD interrupt although disabled\n");
+			  "Received HPD interrupt (0x%08x) on pin %d (0x%08x) although disabled\n",
+			  hotplug_trigger, i, hpd[i]);
 
 		if (!(hpd[i] & hotplug_trigger) ||
 		    dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)