drm/amd/display: Allow idle opts for no flip case on PSR panel

[Why & How]
There is a corner case where a single PSR panel
fails to enter idle optimizations if the panel
is not flipping (no planes or DPMS_OFF == true).
This is because the panel will not enter PSR if it's
not flipping, but this will prevent the FW idle opt
path from being executed. To handle this case we will
allow entry to idle opt from driver side even when a
PSR panel is connected under the following scenarios:
	1. Only a single PSR panel is connected
	2. PSR panel is not flipping

Reviewed-by: Samson Tam <[email protected]>
Acked-by: Tom Chung <[email protected]>
Signed-off-by: Alvin Lee <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

1 files changed, 3 insertions, 1 deletions

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 c0b526cf1786..a5e92389615f 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
@@ -261,7 +261,9 @@ bool dcn32_apply_idle_power_optimizations(struct dc *dc, bool enable)
 	for (i = 0; i < dc->current_state->stream_count; i++) {
 		/* MALL SS messaging is not supported with PSR at this time */
 		if (dc->current_state->streams[i] != NULL &&
-				dc->current_state->streams[i]->link->psr_settings.psr_version != DC_PSR_VERSION_UNSUPPORTED)
+				dc->current_state->streams[i]->link->psr_settings.psr_version != DC_PSR_VERSION_UNSUPPORTED &&
+				(dc->current_state->stream_count > 1 || (!dc->current_state->streams[i]->dpms_off &&
+						dc->current_state->stream_status[i].plane_count > 0)))
 			return false;
 	}