drm/amd/display: Add callbacks for DMUB HPD IRQ notifications

[Why]
We need HPD IRQ notifications (RX, short pulse) to properly handle
DP MST for DPIA connections.

[How]
A null pointer exception currently occurs when these are received
so add a check to validate that we have a handler installed for
the notification.

Extend the HPD handler to also handle HPD IRQ (RX) since the logic is
the same.

Fixes: e27c41d5b068 ("drm/amd/display: Support for DMUB HPD interrupt handling")

Reviewed-by: Wayne Lin <[email protected]>
Reviewed-by: Jude Shih <[email protected]>
Acked-by: Anson Jacob <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Nicholas Kazlauskas <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

0 files changed, 0 insertions, 0 deletions