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-rw-r--r--drivers/gpu/drm/i915/intel_hotplug.c8
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 bac91a158ca2..3c9171f11531 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)