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| author | Thulasimani,Sivakumar <sivakumar.thulasimani@intel.com> | 2015-07-10 12:30:43 +0530 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-07-13 11:22:35 +0200 |
| commit | feecb691007831263e6285a25a323f175a081f42 (patch) | |
| tree | 3159d2e1fef5014cfe167b45b35888cd564412b7 /drivers/gpu/drm/i915/intel_hotplug.c | |
| parent | 5e6ccc0b3d16725028caccceb2460fc3473d7d55 (diff) | |
| download | op-kernel-dev-feecb691007831263e6285a25a323f175a081f42.zip op-kernel-dev-feecb691007831263e6285a25a323f175a081f42.tar.gz | |
drm/i915: storm detection documentation update
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>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_hotplug.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_hotplug.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_hotplug.c b/drivers/gpu/drm/i915/intel_hotplug.c index bac91a1..3c9171f 100644 --- a/drivers/gpu/drm/i915/intel_hotplug.c +++ b/drivers/gpu/drm/i915/intel_hotplug.c @@ -66,6 +66,14 @@ * while before being re-enabled. The intention is to mitigate issues raising * from broken hardware triggering massive amounts of interrupts and grinding * 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) |
