drm/amd/display: Notify idle link detection through shared state

[Why]
We can hang in IPS2 checking DMCUB_SCRATCH0 for link detection state.

[How]
Replace the HW access with a check on the shared state bit. This will
work the same way as the SCRATCH0 but won't require a wake in the case
where link detection isn't required.

Reviewed-by: Duncan Ma <[email protected]>
Acked-by: Wayne Lin <[email protected]>
Signed-off-by: Nicholas Kazlauskas <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

0 files changed, 0 insertions, 0 deletions