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Wed, 9 Sep 2026 10:59:48 +0800 From: Neo Chang To: CC: , , , , , , , , , , "Neo Chang" Subject: [PATCH v4 0/2] ASoC: codecs: nau8360: Fix DSP routing and deadlock issues Date: Wed, 9 Sep 2026 10:59:45 +0800 Message-ID: <20260909025947.287120-1-YLCHANG2@nuvoton.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NotSetDelaration: True X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SG2PEPF000B66CB:EE_|SEZPR03MB7297:EE_ X-MS-Office365-Filtering-Correlation-Id: 68c4cae8-bf86-4d29-15a6-08df0e1e6a94 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|36860700016|376014|23010399003|6133799003|18002099003|56012099006|10067099003|11063799006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:211.75.126.7;CTRY:TW;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:NTHCCAS01.nuvoton.com;PTR:211-75-126-7.hinet-ip.hinet.net;CAT:NONE;SFS:(13230040)(82310400026)(1800799024)(36860700016)(376014)(23010399003)(6133799003)(18002099003)(56012099006)(10067099003)(11063799006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: iGkKZmmszgLxAuswOcEFjW8Su+VG3obGVTM4U2zXtA4hPv1p3RJfor4EdtJtaiXs4pg8v4n109YTUur4P7+UfX3LtTo9hDg5tjI5U6Kr1YG4UtfhUAr/cHugGlCL7Hhs+BolV4grf5+1qZP2Rw3yvFNW0kjulCbFyPdfm4aS+dSD3D8uU8fIBCAhYrDKqEwW6R5rGK0qBXYWSCSrCKIYVeyXeuNHm1dFoTsBAaMHRhWi12rNnlIH+px1qbAsPwgb9yj2TNV/oca0YzL14dUREqso1bQeDYN16N0pcqIaVUtwVWfSVxIxMG+IwzvYlwlN0OUbNhon2hwPgxt6AWTJpgibGpmtLAaBAcrwWRPCDuLVIL5qjbKNnrI+HNtqOduFjaspWkc4BZSDd8VByA1L/qprWMe9dSNQB0KvZB4qoC5dqwBVloaZ6Tn73Y9QCPSW X-OriginatorOrg: nuvoton.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Sep 2026 02:59:50.8486 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 68c4cae8-bf86-4d29-15a6-08df0e1e6a94 X-MS-Exchange-CrossTenant-Id: a3f24931-d403-4b4a-94f1-7d83ac638e07 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=a3f24931-d403-4b4a-94f1-7d83ac638e07;Ip=[211.75.126.7];Helo=[NTHCCAS01.nuvoton.com] X-MS-Exchange-CrossTenant-AuthSource: SG2PEPF000B66CB.apcprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SEZPR03MB7297 This patch series addresses two issues in the nau8360 codec driver regarding the DAC mux control: 1. An invalid hardware routing state that occurs when the DSP firmware fails to load but the userspace attempts to switch to the DSP path. 2. A pre-existing AB-BA deadlock triggered during concurrent stream startups or ALSA mixer updates. --- Changes in v4: - Patch 1/2: Changed the return value to -EBUSY instead of 0 to properly reject the invalid request and prevent ALSA state desync. - Patch 1/2: Used dev_warn_ratelimited() instead of dev_warn(). - Patch 2/2: Added a fix for the AB-BA deadlock in nau8360_dac_mux_put_enum(). (Reported by Sashiko AI) Changes in v3: - Block the DSP path selection if the firmware fails to load to prevent invalid routing states. Changes in v2: - Use snd_soc_component_update_bits() to prevent register overwriting. (Reported by Sashiko AI) - Fix missing bit shift for default PEQ band. (Reported by Sashiko AI) Neo Chang (2): ASoC: codecs: nau8360: Block DSP path selection when firmware load fails ASoC: codecs: nau8360: Fix AB-BA deadlock in mux update sound/soc/codecs/nau8360.c | 19 +++++++++++++------ sound/soc/codecs/nau8360.h | 6 ++++++ 2 files changed, 19 insertions(+), 6 deletions(-) -- 2.25.1