[Intel-gfx] [RFC PATCH 0/2] suppress the wrong long hotplug events

[Jani Nikula]

On Tue, 15 Mar 2022, Vinod Govindapillai <vinod.govindapillai at intel.com> wrote:
> Monitors like LG 27UL650-W, 27UK850 goes into power sleep state
> and generates long duration hotplug events even when the monitor
> is connected for display. Here is a proposal to detect and
> suppress such hotplug events by "sleep" for 2 secs for power
> state monitor become available before enable atomic commit.

I don't understand the failure mode. Please elaborate. Do we have a bug
report?

BR,
Jani.

> A debugfs entry is created to enable the suppression of the
> hotplug event in such scenarios.
>
> Cc: Imre Deak <imre.deak at intel.com>
>
> Mohammed Khajapasha (2):
>   drm/i915/display: Add disable wait time for power state connector
>   drm/i915/display: Add sleep for power state connector
>
>  .../gpu/drm/i915/display/intel_connector.c    |  3 +
>  drivers/gpu/drm/i915/display/intel_display.c  | 80 +++++++++++++++++++
>  drivers/gpu/drm/i915/display/intel_display.h  |  8 ++
>  .../drm/i915/display/intel_display_debugfs.c  | 58 ++++++++++++++
>  .../drm/i915/display/intel_display_debugfs.h  |  7 ++
>  .../drm/i915/display/intel_display_types.h    |  2 +
>  drivers/gpu/drm/i915/i915_drv.h               |  2 +
>  7 files changed, 160 insertions(+)

-- 
Jani Nikula, Intel Open Source Graphics Center