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Tue, 18 Aug 2026 15:22:03 -0500 From: To: CC: Harry Wentland , Leo Li , Aurabindo Pillai , Roman Li , Wayne Lin , Tom Chung , "Fangzhi Zuo" , Dan Wheeler , Ray Wu , Ivan Lipski , Alex Hung , James Lin , Chenyu Chen , Ilya Bakoulin , Dillon Varone Subject: [PATCH 14/82] drm/amd/display: Clear HUBPREQ_DEBUG_DB on DCN6 Date: Tue, 18 Aug 2026 16:15:06 -0400 Message-ID: <20260818202139.4172592-15-IVAN.LIPSKI@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260818202139.4172592-1-IVAN.LIPSKI@amd.com> References: <20260818202139.4172592-1-IVAN.LIPSKI@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B371:EE_|BN7PPF48E601ED5:EE_ X-MS-Office365-Filtering-Correlation-Id: 773a460f-8388-44f9-d908-08defd6662f4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|82310400026|23010399003|376014|1800799024|36860700016|10086099003|56012099006|10067099003|11063799006|22082099003|18002099003; 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DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: DPU/C8xfUEMyEmtZ8PAS7YX4QvQT6XaWjsxgDfIkpcLwiPSbSNqkm+P/2AttfHclKyFi216Uk7oXFqFhiT/V3Ytlx1h9W3wjsNmeFvuo544nmiXC4QZ7MqiZVH+DH1mEOntws2XY6ibzSqnN8xulaDXl52Sv7WSNc7SBfImeI8LHjYk/ITeREfbKB6M22smGDt9M2fmq3Y9bdcn99Tu+Hewniov3IsWqIP/KEFF1+2zNvBkRdWqrYhVWQSYN4VdPXI6RwkOcYR/mwA9Jfu/VI5TJSZ0lRxbO2PQTl+03leKM67LKRmPm3uf04LY2pdmPCpX5a5B/KMHUDlCzxkzger6yezl7lqI5A7sl3I0jGzikiOt8VZQV/M1eC9C3XuCd5PuCIMUu9dbtAmUhtMUVrMposlpN6jiuy9GPVQqVPu+dMTTfO4gO/dpJNWgDKY/g X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Aug 2026 20:22:12.1464 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 773a460f-8388-44f9-d908-08defd6662f4 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B371.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN7PPF48E601ED5 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Ilya Bakoulin [Why/How] Make sure the HUBPREQ_DEBUG_DB register is cleared to prevent underflow in some instances. Reviewed-by: Dillon Varone Signed-off-by: Ilya Bakoulin Signed-off-by: Ivan Lipski --- drivers/gpu/drm/amd/display/dc/hubp/dcn60/dcn60_hubp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn60/dcn60_hubp.c b/drivers/gpu/drm/amd/display/dc/hubp/dcn60/dcn60_hubp.c index d22fe26aae623..01b6b3ed5a998 100644 --- a/drivers/gpu/drm/amd/display/dc/hubp/dcn60/dcn60_hubp.c +++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn60/dcn60_hubp.c @@ -25,6 +25,9 @@ static void hubp60_program_deadline( { struct dcn20_hubp *hubp2 = TO_DCN20_HUBP(hubp); + /* Make sure DLG test mode is disabled */ + REG_WRITE(HUBPREQ_DEBUG_DB, 0); + /* DLG - Per hubp */ REG_SET_2(BLANK_OFFSET_0, 0, REFCYC_H_BLANK_END, dlg_attr->refcyc_h_blank_end, -- 2.43.0