From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1DA8239936D; Wed, 2 Sep 2026 08:05:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788336312; cv=none; b=ACkRIM8MxCAYJb+Y4Zb4Uq3UhYfEh7ClSN6VcuOrCDTJmb9oJrV1RdJGkA1pW1J2cnQJa2RIXdiCE2Dzxsj43yUgucMTO+hQq07HSQnZDGUgOkp7Kb3zO286fe6EmD6Y+Ma1kMRA7UIIDptbLktrv714hM6+V+p9Wqey8umluuY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788336312; c=relaxed/simple; bh=lq9JgEOgUjRFqITnZEyhYKUAqfLwFlGsgTZt+Dslitw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=FjxKnUIu5u1NCN8SBEtKCcINBzuQ/LygPu6qpL/7XsT0/ZcPTJ3rhtGqbJYY6aCJW3k/fWBxEBSa6gxIT6LrJSoZojcdMH/lVjpKrdvtwxivwTp2tIQbk83zSyNml7pKo93Pu5Mc4d6LGCA075xfcwcA8Svu8PjM12NNhECcBbo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=HJ5KONVc; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="HJ5KONVc" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 965D81F00A3A; Wed, 2 Sep 2026 08:05:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788336311; bh=G/IFPDyfzhIoZFct3RGPm8HsjSQA2NovYHhqihlRERM=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=HJ5KONVceE9WDdEl13snx/1ss5v26p0c90/Uyspgg39/l3AnJVD74qKMvPxTPO0RK f2hSpEoUmq/LS4jl4FWxc5NezuprOt1lZFzOfAkkIdm1Fwujx1tmHg6WF7mcUi/ycC ccEyHML+cCiZGC118eACYi0zu3PyYkjJimitAVpra+G7T99XzWcKC7nbQV6Om5O7yL knWWJGplwNJHsNasXzJlRX51b/qgn19KMail3KWB3BzaSYaymVz+HRbKGgEcSh5Bu+ pLbvn2wHzpK5fwGQvyhAIhxhEedDKFFcICbhKTpar82OENxd9f47GT35ULMKY0U2bX 4TQYLKc7EOYjQ== From: Yixun Lan Date: Wed, 02 Sep 2026 08:04:26 +0000 Subject: [PATCH 5/7] mmc: sdhci-of-k1: Use finest delay granularity for RX tuning Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260902-07-k3-sdhci-fix-v1-5-b15c5d0f64fd@kernel.org> References: <20260902-07-k3-sdhci-fix-v1-0-b15c5d0f64fd@kernel.org> In-Reply-To: <20260902-07-k3-sdhci-fix-v1-0-b15c5d0f64fd@kernel.org> To: Adrian Hunter , Ulf Hansson Cc: Long Wan , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, Yixun Lan X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=956; i=dlan@kernel.org; h=from:subject:message-id; bh=Qc6WE/5RPjDixK1mUhV9vvXFCMN4SYq/CXesrgV9Q1I=; b=owEB6QIW/ZANAwAKATGq6kdZTbvtAcsmYgBql9ihfSPbM8z87ZD5AM1H264Ay5pIZvFam/itK zID5CTkEECJAq8EAAEKAJkWIQS1urjJwxtxFWcCI9wxqupHWU277QUCapfYoRsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDJfFIAAAAAALgAoaXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5 maWZ0aGhvcnNlbWFuLm5ldEI1QkFCOEM5QzMxQjcxMTU2NzAyMjNEQzMxQUFFQTQ3NTk0REJCRU QACgkQMarqR1lNu+1G+BAAgpTS/M0HkvRKnO1EfRhtp88v9Dd2D0E0eHhWTINBKK3fhiO9DvBKb ApPMdK3PNMQIItxwU5/ieJZR5fMdqafc9x1zxVO0yMJOWeLOl14YnvpAnkdcGMxywnQLkQJ2Z+L A6lH9mroEHe0RA60Lq/eCi/7cqtdf2t1EN3dXGdHUrgof9ZQ3tI595+9DVOjBvZkZq3RKH9vr5N mORakmF5dfyj+GuGZegw7qz+4ncvibN8QVRdC2dpStHdzlMt0F1UnrXkaVaDT76ojVspljRb/9t M3MvnkIkLe1SULqSDuy9EsyRQKCDUWuhIIuE47GrCHq4wDs9ut5taN5K2nOX3845UylsQcq1PMC x8cEkXtnyTux1zykVjaIfZV6kP1X8kC6Cx75MMCofn5gqjV56eRkLFZlEOuNcUN7lTM3w8xVU29 goucnrs2fgyHInfDzgXLXzIxTg2be40HKKEhTDyvyUhEc3k94tPjy9N8BkAppj7hr//fGsr4HFP HFj0er/4wYYoest7EEKmeGcQGCSVAc+Bp+/WUZvR1uYjvRVXDZvfNumfgYO4L/3NXiMzjJGOVy4 LThqRSNTT0TuIEwkv7Gq7Lojsvg291gFh5SElyx+vzo1J+/c7aCVVNCReikeFryuj8xeV4ywmWB Z4Y5Ofchn54RiHIeAqjquJ6Rtz2S4Y= X-Developer-Key: i=dlan@kernel.org; a=openpgp; fpr=50B03A1A5CBCD33576EF8CD7920C0DBCAABEFD55 From: Long Wan Initialize the RX delay line to 0 (finest step size) instead of 9. This improves tuning precision by allowing smaller delay increments when searching for the optimal sampling point. Fixes: e9cb83c10071 ("mmc: sdhci-of-k1: add comprehensive SDR tuning support") Signed-off-by: Long Wan Signed-off-by: Yixun Lan --- drivers/mmc/host/sdhci-of-k1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-of-k1.c b/drivers/mmc/host/sdhci-of-k1.c index be770e8a9884..257c954ce587 100644 --- a/drivers/mmc/host/sdhci-of-k1.c +++ b/drivers/mmc/host/sdhci-of-k1.c @@ -84,7 +84,7 @@ #define SDHC_RX_DLINE_GAIN BIT(8) #define SDHC_TX_DLINE_REG_MASK GENMASK(23, 16) -#define SPACEMIT_RX_DLINE_REG 9 +#define SPACEMIT_RX_DLINE_REG 0 #define SPACEMIT_RX_TUNE_DELAY_MIN 0x0 #define SPACEMIT_RX_TUNE_DELAY_MAX 0xFF -- 2.55.0