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Thu, 5 Nov 2026 09:16:56 +0100 Message-ID: <7ffc8269-f02f-46de-ad79-3805b2471d79@foss.st.com> Date: Thu, 5 Nov 2026 09:16:55 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/5] mmc: mmci: stm32: release the delay block before enabling it To: Mateusz Nowicki , Ulf Hansson , CC: Russell King , Linus Walleij , Yann Gautier , Maxime Coquelin , Alexandre Torgue , Rob Herring , Krzysztof Kozlowski , Conor Dooley , , , , , References: <20261104152657.14909-1-mateusz.nowicki@posteo.net> <20261104152657.14909-3-mateusz.nowicki@posteo.net> Content-Language: en-US From: Christophe KERELLO In-Reply-To: <20261104152657.14909-3-mateusz.nowicki@posteo.net> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: STKCAS1NODE1.st.com (10.75.128.134) To STKDAG1NODE2.st.com (10.75.128.133) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MAD0EPF000008A9:EE_|AM7PR10MB3923:EE_ X-MS-Office365-Filtering-Correlation-Id: f4f14656-e07d-423c-6902-08df3b15297d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|1800799024|82310400026|23010399003|7416014|376014|10067099003|18002099003|22082099003|4143699003|56012099006|11063799006|261026140227099003|261028144727099003|261022105027099003|261021121427099003|261021123027099003|261009223027099003|261102123227099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: JKg2az7vq+ZR8t8fl4jqRJ5kKcQGB3F6DFf+50jBRmi4Q6P6cORYTSjbHmBCtZMg5gKCYn9dx+D5pdsN25R9/BVZ8IQxzeqa1O+tPXRrCmCG9fajzaO8+eFilAU4psAAClRJh+3++qYme3pJ/FACQ00ij7rYrHpMliiAVdXY+/YbBdv9Flma8BcKPxO/AEOApgFLKy2hXrY6qJQGvY+1ksJZvNhPjjzLR/W+dtUdy8xrvfMP7B2VCSMr7cF48LlbvyYuSRh1v4OzIcL4Nhp8CqFSUlZn4XDZTUcH/92kHq1UvTljILcEZ0ddzz6xDzLJ07Oxbv2l83GCO5Trc4gZNZzlJXkaEzGNJmsStIvlcJbr9//SCjikaMYPmLTvNieDYNDpRBjFNQAf8YbX9oEHf1kcSnMYkesOnHs4ii5i6cZl8CWZ9wcfD3dNuwmKzN4W X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Nov 2026 08:16:58.5142 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f4f14656-e07d-423c-6902-08df3b15297d X-MS-Exchange-CrossTenant-Id: 75e027c9-20d5-47d5-b82f-77d7cd041e8f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=75e027c9-20d5-47d5-b82f-77d7cd041e8f;Ip=[164.130.1.60];Helo=[smtpO365.st.com] X-MS-Exchange-CrossTenant-AuthSource: MAD0EPF000008A9.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR10MB3923 Hello Mateusz, On 11/4/26 16:27, Mateusz Nowicki wrote: > From: Christophe Kerello > > The delay block must be locked on the last frequency set. To avoid it > staying locked on a frequency used before, disable it first and wait for > the lock to drop before enabling it again. > > Fixes: b5c3eb385797 ("mmc: mmci: stm32: add delay block support for STM32MP25") > Cc:stable@vger.kernel.org > Signed-off-by: Christophe Kerello > [Mateusz: reworded the commit message, added Fixes and Cc stable] > Signed-off-by: Mateusz Nowicki > --- > > Notes: > On the STM32MP257F-DK eMMC in HS200 at 150 MHz, switching from DDR52 to > HS200 made the tuning pick a wrong phase in 9 of 18 tries without this > change, the phase was right in all 12 tries with it. > > drivers/mmc/host/mmci_stm32_sdmmc.c | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) Reviewed-by: Christophe Kerello Regards, Christophe Kerello.