SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
The following sequence will occur for each VBUSP write to the doorbell register (RINGRT[a]_RT_DB) for a ring:
RINGACC extracts ring number from config address
RINGACC looks up ring state using ring number
RINGACC adds doorbell ring value to both HW and SW occupancies for ring
RINGACC re-evaluates pending bit for ring