-/*
- * Copyright 2021 Advanced Micro Devices, Inc.
+/* Copyright 2021 Advanced Micro Devices, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
return eng_id;
}
-static bool is_avail_link_enc(struct dc_state *state, enum engine_id eng_id)
+/* Check for availability of link encoder eng_id. */
+static bool is_avail_link_enc(struct dc_state *state, enum engine_id eng_id, struct dc_stream_state *stream)
{
bool is_avail = false;
int eng_idx = eng_id - ENGINE_ID_DIGA;
- if (eng_id != ENGINE_ID_UNKNOWN && state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] != ENGINE_ID_UNKNOWN)
+ /* An encoder is available if it is still in the availability pool. */
+ if (eng_id != ENGINE_ID_UNKNOWN && state->res_ctx.link_enc_cfg_ctx.link_enc_avail[eng_idx] != ENGINE_ID_UNKNOWN) {
is_avail = true;
+ } else {
+ struct dc_stream_state *stream_assigned = NULL;
+
+ /* MST streams share the same link and should share the same encoder.
+ * If a stream that has already been assigned a link encoder uses as the
+ * same link as the stream checking for availability, it is an MST stream
+ * and should use the same link encoder.
+ */
+ stream_assigned = get_stream_using_link_enc(state, eng_id);
+ if (stream_assigned && stream != stream_assigned && stream->link == stream_assigned->link)
+ is_avail = true;
+ }
return is_avail;
}
if (stream == prev_stream && stream->link == prev_stream->link &&
prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].valid) {
eng_id = prev_state->res_ctx.link_enc_cfg_ctx.link_enc_assignments[j].eng_id;
- if (is_avail_link_enc(state, eng_id))
+ if (is_avail_link_enc(state, eng_id, stream))
add_link_enc_assignment(state, stream, eng_id);
}
}