linux-kernel - FAILED: Patch "Revert "drm/amd/display: Send DTBCLK disable message on first commit"" failed to apply to 4.19-stable tree

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Date: Wed, 27 Mar 2024 08:28:51 -0400
From: Sasha Levin <sashal@...nel.org>
To: stable@...r.kernel.org,
	gabe.teeger@....com
Cc: Mario Limonciello <mario.limonciello@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Ovidiu Bunea <ovidiu.bunea@....com>,
	Aurabindo Pillai <aurabindo.pillai@....com>,
	Daniel Wheeler <daniel.wheeler@....com>,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: FAILED: Patch "Revert "drm/amd/display: Send DTBCLK disable message on first commit"" failed to apply to 4.19-stable tree

The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@...r.kernel.org>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

>From 3a6a32b31a111f6e66526fb2d3cb13a876465076 Mon Sep 17 00:00:00 2001
From: Gabe Teeger <gabe.teeger@....com>
Date: Mon, 29 Jan 2024 13:31:44 -0500
Subject: [PATCH] Revert "drm/amd/display: Send DTBCLK disable message on first
 commit"

This reverts commit f341055b10bd8be55c3c995dff5f770b236b8ca9.

System hang observed, this commit is thought to be the
regression point.

Cc: Mario Limonciello <mario.limonciello@....com>
Cc: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Reviewed-by: Ovidiu Bunea <ovidiu.bunea@....com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@....com>
Signed-off-by: Gabe Teeger <gabe.teeger@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
---
 drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
index 06edca50a8fa1..36e5bb611fb10 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c
@@ -414,7 +414,6 @@ static void init_clk_states(struct clk_mgr *clk_mgr)
 	uint32_t ref_dtbclk = clk_mgr->clks.ref_dtbclk_khz;
 	memset(&(clk_mgr->clks), 0, sizeof(struct dc_clocks));
 
-	clk_mgr->clks.dtbclk_en = true;
 	clk_mgr->clks.ref_dtbclk_khz = ref_dtbclk;	// restore ref_dtbclk
 	clk_mgr->clks.p_state_change_support = true;
 	clk_mgr->clks.prev_p_state_change_support = true;
-- 
2.43.0