From nobody Wed Nov 27 14:26:28 2024 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) (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 11E801F8EE5; Thu, 10 Oct 2024 14:31:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.207.212.93 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728570710; cv=none; b=i63gLmPl03LvXjqPoy5eRPoY+8GfO/i5AU0LnI0r6EzzKl2KM7bIT/jqEFrC0S0OXX+rQEz6SFsT8ILduwEgfeHj4tky5kGB85JB388rWa6UcyqRiG1FDGv0dftbAONGt8j/XLiZAbLRyiARV4priG+sv0yU3DH0pxZLsNQ4jyM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728570710; c=relaxed/simple; bh=N2m1gfifwajmg6EnZMzZvXKqHVIAAPvDCXo9JlOB5Tc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:CC; b=G/88HeZagxOSlLeJ78Qe0bIMO9TXNhFrmcp+uPrYq+ZNcqq5qlF4kOiWhKQUneagS1O6g/0f5jfeDJKtT8wQVjF2cK5DorQqqvOgqNNaqTO/YeBaLhjZn3lR4UAWU6OqVnOOSn9SEgjsoIN7C6ZDAv2oOVWePdl3/uFoI+0qeZo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com; spf=pass smtp.mailfrom=foss.st.com; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b=t+Tm3TBm; arc=none smtp.client-ip=91.207.212.93 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foss.st.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foss.st.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=foss.st.com header.i=@foss.st.com header.b="t+Tm3TBm" Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49A93TNI014746; Thu, 10 Oct 2024 16:31:35 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=selector1; bh= h4I11Ou8IOZpUXGFEYlLtaaqmE8Vy707B+jgjAFXffM=; b=t+Tm3TBmhs0fEr10 plbNUtImFIFmEt0NkQBH9hdqo/B3SN/AhazROIGIKYGJl7JaGzjchPAbk9L6tx9x lb3I/S6hb01yQYRK4/GT3QLeMlZF213UHAY53Z+vzkpRH6b+cJEVTx2dgn60QJ+T Ge02QFlyqhi7s9FBfH4NbkfBhWkas4JUvFog1TkxBX4kNdPcxW+TA0r/ypAatkgF nGBsj04qL1JCqFplj4yMx6t1typIKnX6yTdEAec2QK+q3fNgPj9ZZ4KvlZepJKIM 3ng2FyH32jcftnftBRM9ri8cdS8nkz7435/xGOiIBV+wPJ0HY/aalajngYGgRuco D0/kSA== Received: from beta.dmz-ap.st.com (beta.dmz-ap.st.com [138.198.100.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 425w9xcvka-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 10 Oct 2024 16:31:35 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 41A454008D; Thu, 10 Oct 2024 16:30:22 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node3.st.com [10.75.129.71]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 81B392967DE; Thu, 10 Oct 2024 16:28:09 +0200 (CEST) Received: from localhost (10.252.31.182) by SHFDAG1NODE3.st.com (10.75.129.71) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.37; Thu, 10 Oct 2024 16:28:09 +0200 From: Amelie Delaunay Date: Thu, 10 Oct 2024 16:27:54 +0200 Subject: [PATCH 04/11] dt-bindings: dma: stm32-dma3: prevent linked-list refactoring Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <20241010-dma3-mp25-updates-v1-4-adf0633981ea@foss.st.com> References: <20241010-dma3-mp25-updates-v1-0-adf0633981ea@foss.st.com> In-Reply-To: <20241010-dma3-mp25-updates-v1-0-adf0633981ea@foss.st.com> To: Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue CC: , , , , , Amelie Delaunay X-Mailer: b4 0.14.2 X-ClientProxiedBy: SHFCAS1NODE1.st.com (10.75.129.72) To SHFDAG1NODE3.st.com (10.75.129.71) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 stm32-dma3 driver refactors the linked-list in order to address the memory with the highest possible data width. It means that it can introduce up to 2 linked-list items. One with a transfer length multiple of channel maximum burst length and so with the highest possible data width. And an extra one with the latest bytes, with lower data width. Some devices (e.g. FMC ECC) don't support having several transfers instead of only one. So add the possibility to prevent linked-list refactoring, by setting bit 17 of the 'DMA transfer requirements' bit mask. Signed-off-by: Amelie Delaunay --- Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml= b/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml index 5484848735f8ac3d2050104bbab1d986e82ba6a7..38c30271f732e0c8da48199a224= a88bb647eeca7 100644 --- a/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml +++ b/Documentation/devicetree/bindings/dma/stm32/st,stm32-dma3.yaml @@ -99,6 +99,9 @@ properties: -bit 16: Prevent packing/unpacking mode 0x0: pack/unpack enabled when source data width/burst !=3D desti= nation data width/burst 0x1: memory data width/burst forced to peripheral data width/bur= st to prevent pack/unpack + -bit 17: Prevent linked-list refactoring + 0x0: don't prevent driver to refactor the linked-list for optima= l performance + 0x1: prevent driver to refactor the linked-list, despite not opt= imal performance =20 required: - compatible --=20 2.25.1