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drm/i915: storm detection documentation update

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Update the hotplug documentation to explain that hotplug storm
is not expected for Display port panels and hence is not handled
in current code.

v2: update the statements as recommended by Daniel

Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Thulasimani,Sivakumar 2015-07-10 12:30:43 +05:30 committed by Daniel Vetter
parent 5e6ccc0b3d
commit feecb69100
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/i915/intel_hotplug.c
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@ -66,6 +66,14 @@
* while before being re-enabled. The intention is to mitigate issues raising * while before being re-enabled. The intention is to mitigate issues raising
* from broken hardware triggering massive amounts of interrupts and grinding * from broken hardware triggering massive amounts of interrupts and grinding
* the system to a halt. * the system to a halt.
*
* Current implementation expects that hotplug interrupt storm will not be
* seen when display port sink is connected, hence on platforms whose DP
* callback is handled by i915_digport_work_func reenabling of hpd is not
* performed (it was never expected to be disabled in the first place ;) )
* this is specific to DP sinks handled by this routine and any other display
* such as HDMI or DVI enabled on the same port will have proper logic since
* it will use i915_hotplug_work_func where this logic is handled.
*/ */
enum port intel_hpd_pin_to_port(enum hpd_pin pin) enum port intel_hpd_pin_to_port(enum hpd_pin pin)