[PATCH v4 0/3] Pass down hot plug CONNECTOR ID to user-space

[Marius Vlad <marius.vlad@collabora.com>]

Patch series addresses a shortcoming where we're sending a hot plug event
without passing the actual CONNECTOR that caused it. This takes into
consideration both the polling path and the HPD (Hot Plug Detect) path.

v4:

- removed the "This patch" bit - Dmitry
- added a short note when the flag is set and cleared - Dmitry
- address double dead-locking detected - kbot: https://lore.kernel.org/dri-devel/202509251410.fdfbcac3-lkp@intel.com/
- virtual connectors do not seem have any kind of hotplug - added
  polling in vkms - as noted by Ian

v3: Address comments from Dmitry

- guard connector status write with mode_config.mutex
- avoid setting up the connector status and immediately unset it. Do the
  unset in drm_kms_helper_hotplug_event/drm_kms_helper_connector_hotplug_event
- v3 is at https://lore.kernel.org/dri-devel/20250923083636.4749-1-marius.vlad@collabora.com/

v2: Address comments from Daniel

- split patch into 2, one that introduces a bool to track connector
  connection status change and a patch that uses that to be able to send
  hot plug events with the proper CONNECTOR ID to udev and further pass
  that down to user-space
- nuke out mutex when iterating connector list
- fix typo
- v2 is at https://lore.kernel.org/dri-devel/20250729165708.9947-1-marius.vlad@collabora.com/


Marius Vlad (3):
  drm: Introduce a new connector status
  drm: Propagate connector status change
  drm/vkms: Add polling for HPD

 drivers/gpu/drm/drm_connector.c    |  1 +
 drivers/gpu/drm/drm_probe_helper.c | 39 ++++++++++++++++++++++++++----
 drivers/gpu/drm/drm_sysfs.c        |  1 +
 drivers/gpu/drm/vkms/vkms_drv.c    |  4 +++
 include/drm/drm_connector.h        |  3 +++
 5 files changed, 43 insertions(+), 5 deletions(-)

-- 
2.47.2