linux-kernel - [PATCH AUTOSEL 6.1 54/85] drm/amd/display: Fix display corruption w/ VSR enable

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Message-Id: <20221218160142.925394-54-sashal@kernel.org>
Date:   Sun, 18 Dec 2022 11:01:11 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Ilya Bakoulin <Ilya.Bakoulin@....com>,
        Dillon Varone <Dillon.Varone@....com>,
        Brian Chang <Brian.Chang@....com>,
        Daniel Wheeler <daniel.wheeler@....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, aurabindo.pillai@....com,
        jun.lei@....com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.1 54/85] drm/amd/display: Fix display corruption w/ VSR enable

From: Ilya Bakoulin <Ilya.Bakoulin@....com>

[ Upstream commit e643cd384270fd3a4b66f65f15dafc8db0607adc ]

[Why]
Brief corruption is observed on hotplug/unplug with certain display
configurations when VSR is enabled.

[How]
Work around the issue by avoiding 2to1 ODM when stream plane_count is 0.

Reviewed-by: Dillon Varone <Dillon.Varone@....com>
Acked-by: Brian Chang <Brian.Chang@....com>
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....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.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
index d1598e3131f6..33ab6fdc3617 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
@@ -1901,7 +1901,7 @@ int dcn32_populate_dml_pipes_from_context(
 
 		pipes[pipe_cnt].pipe.dest.odm_combine_policy = dm_odm_combine_policy_dal;
 		if (context->stream_count == 1 &&
-				context->stream_status[0].plane_count <= 1 &&
+				context->stream_status[0].plane_count == 1 &&
 				!dc_is_hdmi_signal(res_ctx->pipe_ctx[i].stream->signal) &&
 				is_h_timing_divisible_by_2(res_ctx->pipe_ctx[i].stream) &&
 				pipe->stream->timing.pix_clk_100hz * 100 > DCN3_2_VMIN_DISPCLK_HZ &&
-- 
2.35.1