[PATCH 0/2][SRU][C] drm/i915: Fix hotplug issues

[You-Sheng Yang]

BugLink: http://bugs.launchpad.net/bugs/1835001

[Impact]
System does not always auto detect disconnection of external monitor on
Intel VGA.

[Fix]
Two changes from drm-intel tree are necessary to introduce hotplug
retrying to fix this issue. They are:

  * drm/i915: Add support for retrying hotplug
  * drm/i915: Enable hotplug retry

[Test Case]
1. open "system settings > display settings"
2. connect laptop to an external HDMI monitor via HDMI port & cable
3. unplug the HDMI cable
4. check if "display settings" automatically detects the removal of the
external monitor

[Regression potential]
Medium. For all the prerequisites they have been landed since 4.18, and
these two patches will only be merged some time later. Basically it
turns a currently existing kernel work to a delayed work so that it may
retry probing HDMI hotplug status.

Imre Deak (1):
  drm/i915: Add support for retrying hotplug

José Roberto de Souza (1):
  drm/i915: Enable hotplug retry

 drivers/gpu/drm/i915/i915_debugfs.c  |  2 +
 drivers/gpu/drm/i915/i915_drv.h      |  3 +-
 drivers/gpu/drm/i915/intel_ddi.c     | 33 +++++++++++++---
 drivers/gpu/drm/i915/intel_dp.c      | 19 ++++++---
 drivers/gpu/drm/i915/intel_drv.h     | 16 ++++++--
 drivers/gpu/drm/i915/intel_hdmi.c    | 28 ++++++++++++-
 drivers/gpu/drm/i915/intel_hotplug.c | 59 ++++++++++++++++++++++------
 drivers/gpu/drm/i915/intel_sdvo.c    |  8 ++--
 8 files changed, 136 insertions(+), 32 deletions(-)

-- 
2.20.1