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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Alex Hung <alex.hung@amd.com>,
	Harry Wentland <harry.wentland@amd.com>,
	Alex Deucher <alexander.deucher@amd.com>,
	Sasha Levin <sashal@kernel.org>,
	sunpeng.li@amd.com,
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	Xinhui.Pan@amd.com,
	airlied@gmail.com,
	daniel@ffwll.ch,
	alvin.lee2@amd.com,
	wayne.lin@amd.com,
	dillon.varone@amd.com,
	qingqing.zhuo@amd.com,
	aurabindo.pillai@amd.com,
	amd-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org
Subject: [PATCH AUTOSEL 6.1 14/53] drm/amd/display: Fix writeback_info never got updated
Date: Mon, 22 Jan 2024 10:08:15 -0500
Message-ID: <20240122150949.994249-14-sashal@kernel.org>
In-Reply-To: <20240122150949.994249-1-sashal@kernel.org>
References: <20240122150949.994249-1-sashal@kernel.org>
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From: Alex Hung <alex.hung@amd.com>

[ Upstream commit 8a307777c36e15f38c9f23778babcd368144c7d8 ]

[WHY]
wb_enabled field is set to false before it is used, and the following
code will never be executed.

[HOW]
Setting wb_enable to false after all removal work is completed.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/dc/core/dc_stream.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
index 556c57c390ff..12b73b0ff19e 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c
@@ -514,18 +514,13 @@ bool dc_stream_remove_writeback(struct dc *dc,
 		return false;
 	}
 
-//	stream->writeback_info[dwb_pipe_inst].wb_enabled = false;
-	for (i = 0; i < stream->num_wb_info; i++) {
-		/*dynamic update*/
-		if (stream->writeback_info[i].wb_enabled &&
-			stream->writeback_info[i].dwb_pipe_inst == dwb_pipe_inst) {
-			stream->writeback_info[i].wb_enabled = false;
-		}
-	}
-
 	/* remove writeback info for disabled writeback pipes from stream */
 	for (i = 0, j = 0; i < stream->num_wb_info; i++) {
 		if (stream->writeback_info[i].wb_enabled) {
+
+			if (stream->writeback_info[i].dwb_pipe_inst == dwb_pipe_inst)
+				stream->writeback_info[i].wb_enabled = false;
+
 			if (j < i)
 				/* trim the array */
 				stream->writeback_info[j] = stream->writeback_info[i];
-- 
2.43.0