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Tue, 18 Aug 2026 15:22:04 -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 , Alvin Lee , Dillon Varone Subject: [PATCH 15/82] drm/amd/display: Disable alt-ch until dependencies are ready Date: Tue, 18 Aug 2026 16:15:07 -0400 Message-ID: <20260818202139.4172592-16-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_|MW4PR12MB7334:EE_ X-MS-Office365-Filtering-Correlation-Id: f8139141-66cd-4196-7389-08defd66632a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|376014|82310400026|23010399003|36860700016|1800799024|56012099006|10067099003|22082099003|18002099003|11063799006; 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DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: VqbVxkyK6QHdyGom9En2KmCuleobV+myBW0aHQF0GxdA2NbvUn8wUnBv/5Gu6RuLkGkI4tXc72W4pbREXe2oeuA99c1t76bsSE/sJFi2z55xFIaCQ0J2CdKjV5A+pUugNS/ohD55E48Hk/ATJd1UfoVYA+Cn+qt1zVnxRlDenZcI2Nf7dL7pXDyufsLfPRp34BcEbqrR+YgtP+W/xuxM/qqe0naK2z3xx4KrrTFQv8MNyY7WPXkebFJ8oPH5+3b/B8PDlyudaeaZqQyb1wV9k0c2atn4lLxy+VJb7PONEBIL684UBMZWglQdRyhTqHK18DbHeHPn2pRHxtV+s0zEu24eU3ZAgo8Njmll+THXV3NNPl4m6qMosPv+G+22aMxxeOCz4vfU/jYMLkzhvp0lrXzixXzeLXd+fbV4vwgoyt/cv6VegYOfhGYooRzLjrcp X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Aug 2026 20:22:12.5014 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f8139141-66cd-4196-7389-08defd66632a 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: MW4PR12MB7334 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: Alvin Lee [Description] - Alt-Ch cannot be enabled until all dependncies are ready (SMU needs to support double p-state + IFWI needs to support G7 regions enabled). - If PMFW enables UCLK DPM without double p-state support and alt-ch is enabled then hangs could occur Reviewed-by: Dillon Varone Signed-off-by: Alvin Lee Signed-off-by: Ivan Lipsi --- drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c index 7171b237c4278..d7947105af223 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dcn60/dcn60_resource.c @@ -671,6 +671,8 @@ static const struct dc_debug_options debug_defaults_drv = { } }, .force_cositing = CHROMA_COSITING_NONE + 1, + .dml21_disable_pstate_method_mask = 0x20, // disable alt-ch unconditionally until dependencies are ready + }; static const struct dc_check_config config_defaults = { -- 2.43.0