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LVDS does not use an HPD pin so it may be invalid. Handle this case correctly in link encoder creation. Fixes:7c8fb3b8e9("drm/amd/display: Add hpd_source index check for DCE60/80/100/110/112/120 link encoders") Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/5012 Cc: Srinivasan Shanmugam <[email protected]> Cc: Roman Li <[email protected]> Reviewed-by: Roman Li <[email protected]> Reviewed-by: Srinivasan Shanmugam <[email protected]> Signed-off-by: Alex Deucher <[email protected]> (cherry picked from commit3b5620f7ee) Cc: [email protected]