drm/i915: Disable HPD interrupt on pin when irq storm is detected (v3)

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This patch disables hotplug interrupts if an 'interrupt storm'
has been detected.
Noise on the interrupt line renders the hotplug interrupt useless:
each hotplug event causes the devices to be rescanned which will
will only increase the system load.
Thus disable the hotplug interrupts and fall back to periodic
device polling.

v2: Fixed cleanup typo.
v3: Fixed format issues, clarified a variable name,
    changed pr_warn() to DRM_INFO() as suggested by
    Jani Nikula <jani.nikula@linux.intel.com>.

Signed-off-by: Egbert Eich <eich@suse.de>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Egbert Eich 2013-04-16 13:36:57 +02:00 • committed by Daniel Vetter

parent 995e6b3dcf

commit cd569aed17

1 changed files with 58 additions and 17 deletions

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drivers/gpu/drm/i915/i915_irq.c

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