linux-kernel - [PATCH AUTOSEL 6.6 63/73] drm/amd/display: Fixing stream allocation regression

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Message-ID: <20240122150432.992458-63-sashal@kernel.org>
Date: Mon, 22 Jan 2024 10:02:17 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Relja Vojvodic <relja.vojvodic@....com>,
	Daniel Wheeler <daniel.wheeler@....com>,
	Dillon Varone <dillon.varone@....com>,
	Martin Leung <martin.leung@....com>,
	Rodrigo Siqueira <rodrigo.siqueira@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Sasha Levin <sashal@...nel.org>,
	harry.wentland@....com,
	sunpeng.li@....com,
	Rodrigo.Siqueira@....com,
	christian.koenig@....com,
	Xinhui.Pan@....com,
	airlied@...il.com,
	daniel@...ll.ch,
	alvin.lee2@....com,
	jun.lei@....com,
	samson.tam@....com,
	srinivasan.shanmugam@....com,
	ethan.bitnun@....com,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.6 63/73] drm/amd/display: Fixing stream allocation regression

From: Relja Vojvodic <relja.vojvodic@....com>

[ Upstream commit 292c2116b2ae84c7e799ae340981e60551b18f5e ]

For certain dual display configs that had one display using a 1080p
mode, the DPM level used to drive the configs regressed from DPM 0 to
DPM 3. This was caused by a missing check that should have only limited
the pipe segments on non-phantom pipes. This caused issues with detile
buffer allocation, which dissallow subvp from being used

Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Reviewed-by: Dillon Varone <dillon.varone@....com>
Reviewed-by: Martin Leung <martin.leung@....com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@....com>
Signed-off-by: Relja Vojvodic <relja.vojvodic@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c | 2 +-
 1 file changed, 1 insertion(+), 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 3ad2b48954e0..03bd05596d21 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
@@ -190,7 +190,7 @@ bool dcn32_subvp_in_use(struct dc *dc,
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
 
-		if (pipe->stream && pipe->stream->mall_stream_config.type != SUBVP_NONE)
+		if (pipe->stream && pipe->stream->mall_stream_config.type != SUBVP_PHANTOM != SUBVP_NONE)
 			return true;
 	}
 	return false;
-- 
2.43.0