drm/amd/display: Test HPD RX, HPD init and DMUB callback branches

Browse source

[WHAT]
Add KUnit tests for handle_hpd_rx_irq() re-detecting a downstream port
change on a non-MST-root connector, amdgpu_dm_hpd_init() skipping a
connector with no dc_link, and dmub_hpd_callback() deferring HPD while
suspended. Also add a writeback connector to the HPD registration test.

[HOW]
The downstream-change test reuses dm_test_setup_hpd_rx_irq() and clears
the MST root state, with dc_link_detect() stubbed to fail. The suspend
test leaves adev->dm.ddev NULL, so reaching the connector walk would
crash.

Assisted-by: Copilot:Claude-Opus-5
Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alex Hung 2026-08-12 19:04:04 -06:00 • committed by Alex Deucher

parent 3623121b15

commit bd301aeed2

1 changed files with 109 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

109

drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_irq_test.c

View file