From patchwork Mon Nov 23 09:01:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11924613 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E098EC56202 for ; Mon, 23 Nov 2020 09:02:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F27020731 for ; Mon, 23 Nov 2020 09:02:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="IYRvp9Ir" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727996AbgKWJCW (ORCPT ); Mon, 23 Nov 2020 04:02:22 -0500 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:21150 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726912AbgKWJCV (ORCPT ); Mon, 23 Nov 2020 04:02:21 -0500 Received: from pps.filterd (m0046668.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0AN923RO001995; Mon, 23 Nov 2020 10:02:11 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=ARMYpQFAPbN6ehNxLX8y/wnbOUUC+Hbw3gasCf3TBEA=; b=IYRvp9IrVUZ/xvNUF7sITtwJjCwQRWyfeTPvkgbbFlILtOBdB4XP11hOEp08J2cJPcqa Fab+xXRCSYCyttYNcAeiha9jTDdft4Y2Wg2iceKSxLXpV60DpW4fsHtGbsJfd3UQSjRo z+e3iur26xmeCUV488ee9sqXjq7nML9gzQhW6Y5bcGpK+Bf3731Hb+qEVaN5+pPQ0CD1 NyQg5mnQlVocDO2RpytS/LQ1f3P95PyrMD5h/sQB3ZYvdU593KnJxJcOUPs6p1vA94yP FwC8CcHaqWWmYK1lYx9YIkmDBXhQqFiftdNyyF1Sc6WoZz8W1aK5UEu9XVbmj1WwoyrJ pw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 34y05h064g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 23 Nov 2020 10:02:11 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 4DE25100039; Mon, 23 Nov 2020 10:02:10 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 35E45231F81; Mon, 23 Nov 2020 10:02:10 +0100 (CET) Received: from localhost (10.75.127.46) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 23 Nov 2020 10:01:18 +0100 From: Amelie Delaunay To: Minas Harutyunyan , Felipe Balbi , Greg Kroah-Hartman CC: , , , Fabrice Gasnier , Amelie Delaunay Subject: [PATCH 1/3] usb: dwc2: set ahbcfg parameter for STM32MP15 OTG HS and FS Date: Mon, 23 Nov 2020 10:01:12 +0100 Message-ID: <20201123090114.12641-2-amelie.delaunay@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201123090114.12641-1-amelie.delaunay@st.com> References: <20201123090114.12641-1-amelie.delaunay@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG4NODE2.st.com (10.75.127.11) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-11-23_02:2020-11-20,2020-11-23 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org STM32MP15 ahbcfg register default value sets Burst length/type (HBSTLEN) to Single (32-bit accesses on AHB), which is not recommended, according to STM32MP157 Reference manual [1]. This patch sets Burst length/type (HBSTLEN) so that bus transactions target 16x32 bit accesses. This improves OTG controller performance. [1] https://www.st.com/resource/en/reference_manual/dm00327659.pdf, p.3149 Signed-off-by: Amelie Delaunay Acked-by: Minas Harutyunyan --- drivers/usb/dwc2/params.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c index 267543c3dc38..0df693319f0a 100644 --- a/drivers/usb/dwc2/params.c +++ b/drivers/usb/dwc2/params.c @@ -177,6 +177,7 @@ static void dwc2_set_stm32mp15_fsotg_params(struct dwc2_hsotg *hsotg) p->i2c_enable = false; p->activate_stm_fs_transceiver = true; p->activate_stm_id_vb_detection = true; + p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT; p->power_down = DWC2_POWER_DOWN_PARAM_NONE; } @@ -189,6 +190,7 @@ static void dwc2_set_stm32mp15_hsotg_params(struct dwc2_hsotg *hsotg) p->host_rx_fifo_size = 440; p->host_nperio_tx_fifo_size = 256; p->host_perio_tx_fifo_size = 256; + p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT; p->power_down = DWC2_POWER_DOWN_PARAM_NONE; }