drm/amd/display: Add KUnit tests for HDCP display helpers

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Cover the HDCP display lifecycle helpers:
- hdcp_update_display() registers the connector and, on the
  disable path, resets the per-link encryption status to
  HDCP_OFF.
- hdcp_remove_display() reverts an ENABLED connector back to
  DESIRED and clears the per-link entry, including the NULL
  connector-state path.
- hdcp_reset_display() clears the encryption status and the
  connector for every link.

Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Bhawanpreet Lakha <bhawanpreet.lakha@amd.com>
Signed-off-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Bhawanpreet Lakha 2026-07-10 14:26:01 -04:00 • committed by Alex Deucher

parent fad644eab1

commit 2ed4cb8d26

3 changed files with 214 additions and 1 deletions

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6

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c

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2

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.h

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207

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

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