drm/amd/display: Implement DDC probe over AUX channel

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DDC probe means that we use the DDC (Display Data Channel) to
verify whether a display is connected or not.

This was written with mainly analog connectors in mind, so it
didn't work over the AUX channel. However, in order to support
external DP bridge encoders found in CIK APUs, it needs to work
over the AUX channel too.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Timur Kristóf 2026-01-26 22:08:30 +01:00 • committed by Alex Deucher

parent ee5c4855f4

commit 7b6e66b6dd

1 changed files with 9 additions and 2 deletions

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drivers/gpu/drm/amd/display/dc/link/link_detection.c

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