From 6b67a014931d7d236fbe58a73846edbcd26d41f7 Mon Sep 17 00:00:00 2001
From: Alvin Lee <Alvin.Lee2@amd.com>
Date: Thu, 8 Sep 2022 11:08:25 -0400
Subject: drm/amd/display: Don't allocate DET for phantom pipes
Git-commit: 2447ba5bee91527d3d49c5271b6c34a84fc67bdc
Patch-mainline: v6.1-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849

[Why & How]
We should not allocate any DET for the phantom pipes.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 .../amd/display/dc/dcn32/dcn32_resource_helpers.c    | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
index 14787e0f0b6e..5490b3705b41 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
@@ -271,10 +271,20 @@ void dcn32_determine_det_override(struct dc *dc,
 	struct dc_plane_state *current_plane = NULL;
 	struct pipe_ctx *next_odm_pipe = NULL;
 	struct pipe_ctx *bottom_pipe = NULL;
+	uint8_t stream_count = 0;
+
+	for (i = 0; i < context->stream_count; i++) {
+		/* Don't count SubVP streams for DET allocation */
+		if (context->streams[i]->mall_stream_config.type != SUBVP_PHANTOM) {
+			stream_count++;
+		}
+	}
 
 	if (context->stream_count > 0) {
-		stream_segments = 18 / context->stream_count;
+		stream_segments = 18 / stream_count;
 		for (i = 0; i < context->stream_count; i++) {
+			if (context->streams[i]->mall_stream_config.type == SUBVP_PHANTOM)
+				continue;
 			if (context->stream_status[i].plane_count > 0)
 				plane_segments = stream_segments / context->stream_status[i].plane_count;
 			else
-- 
2.38.1