diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c index c3bbbfd1be941..d75a811c90d95 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c @@ -1719,6 +1719,28 @@ void dcn32_blank_phantom(struct dc *dc, hws->funcs.wait_for_blank_complete(opp); } +/* phantom stream id's can change often, but can be identical between contexts. +* This function checks for the condition the streams are identical to avoid +* redundant pipe transitions. +*/ +static bool is_subvp_phantom_topology_transition_seamless( + const struct dc_state *cur_ctx, + const struct dc_state *new_ctx, + const struct pipe_ctx *cur_pipe, + const struct pipe_ctx *new_pipe) +{ + enum mall_stream_type cur_pipe_type = dc_state_get_pipe_subvp_type(cur_ctx, cur_pipe); + enum mall_stream_type new_pipe_type = dc_state_get_pipe_subvp_type(new_ctx, new_pipe); + + const struct dc_stream_state *cur_paired_stream = dc_state_get_paired_subvp_stream(cur_ctx, cur_pipe->stream); + const struct dc_stream_state *new_paired_stream = dc_state_get_paired_subvp_stream(new_ctx, new_pipe->stream); + + return cur_pipe_type == SUBVP_PHANTOM && + cur_pipe_type == new_pipe_type && + cur_paired_stream && new_paired_stream && + cur_paired_stream->stream_id == new_paired_stream->stream_id; +} + bool dcn32_is_pipe_topology_transition_seamless(struct dc *dc, const struct dc_state *cur_ctx, const struct dc_state *new_ctx) @@ -1737,7 +1759,8 @@ bool dcn32_is_pipe_topology_transition_seamless(struct dc *dc, continue; else if (resource_is_pipe_type(cur_pipe, OTG_MASTER)) { if (resource_is_pipe_type(new_pipe, OTG_MASTER)) - if (cur_pipe->stream->stream_id == new_pipe->stream->stream_id) + if (cur_pipe->stream->stream_id == new_pipe->stream->stream_id || + is_subvp_phantom_topology_transition_seamless(cur_ctx, new_ctx, cur_pipe, new_pipe)) /* OTG master with the same stream is seamless */ continue; } else if (resource_is_pipe_type(cur_pipe, OPP_HEAD)) {