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drm/i915: Only WARN about a stuck hotplug irq ONCE

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It seems that hardware that is broken enough to emit a hotplug IRQ even
though the pin is surposedly disable, will do so indefinitely.

Note: There's a good chance the underlying issue has been fixed with

commit 0ce99f749b
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Fri Jul 26 11:27:49 2013 +0200

    drm/i915: fix gen4 digital port hotplug definitions

References: https://bugzilla.redhat.com/show_bug.cgi?id=1051170
Link: https://bugzilla.redhat.com/attachment.cgi?id=847786
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Add note about the potential fix.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2014-01-10 18:49:20 +00:00 committed by Daniel Vetter
parent 704cfb8788
commit 3432087ef8
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/i915/i915_irq.c
View file

@ -1233,9 +1233,9 @@ static inline void intel_hpd_irq_handler(struct drm_device *dev,
spin_lock(&dev_priv->irq_lock);
for (i = 1; i < HPD_NUM_PINS; i++) {
WARN(((hpd[i] & hotplug_trigger) &&
dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED),
"Received HPD interrupt although disabled\n");
WARN_ONCE(hpd[i] & hotplug_trigger &&
dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED,
"Received HPD interrupt although disabled\n");
if (!(hpd[i] & hotplug_trigger) ||
dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)