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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>,
        Pavle Kotarac <Pavle.Kotarac@amd.com>,
        Eric Yang <Eric.Yang2@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.17 145/158] drm/amd/display: undo clearing of z10 related function pointers
Date:   Mon, 23 May 2022 19:05:02 +0200
Message-Id: <20220523165854.271190940@linuxfoundation.org>
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References: <20220523165830.581652127@linuxfoundation.org>
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From: Eric Yang <Eric.Yang2@amd.com>

[ Upstream commit 9b9bd3f640640f94272a461b2dfe558f91b322c5 ]

[Why]
Z10 and S0i3 have some shared path. Previous code clean up ,
incorrectly removed these pointers, which breaks s0i3 restore

[How]
Do not clear the function pointers based on Z10 disable.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: Eric Yang <Eric.Yang2@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/dcn31/dcn31_init.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_init.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_init.c
index d7559e5a99ce..e708f07fe75a 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_init.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_init.c
@@ -153,9 +153,4 @@ void dcn31_hw_sequencer_construct(struct dc *dc)
 		dc->hwss.init_hw = dcn20_fpga_init_hw;
 		dc->hwseq->funcs.init_pipes = NULL;
 	}
-	if (dc->debug.disable_z10) {
-		/*hw not support z10 or sw disable it*/
-		dc->hwss.z10_restore = NULL;
-		dc->hwss.z10_save_init = NULL;
-	}
 }
-- 
2.35.1