leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/i915: storm detection documentation update

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/i915/intel_hotplug.c
View File

@ -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)