From patchwork Tue Jan 5 09:48:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 11998501 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,USER_AGENT_GIT autolearn=ham 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 E0DE2C433DB for ; Tue, 5 Jan 2021 09:49:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A3E6322482 for ; Tue, 5 Jan 2021 09:49:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728811AbhAEJt4 (ORCPT ); Tue, 5 Jan 2021 04:49:56 -0500 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:42230 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726589AbhAEJtz (ORCPT ); Tue, 5 Jan 2021 04:49:55 -0500 Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 1059kvJA005754; Tue, 5 Jan 2021 10:49:07 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=selector1; bh=vYfqQLYQirAYyccNfjfHJ4bB+gtWVjtxynejUYP/4KE=; b=CXw6QxPX6uFlICw8Z/fMkIRJwdmEptQryiNERbLF1od7E3pnGXBlXzvVGVWzDFoNCZQC Kzv4z3Qi0mvWKcPqClureL3tPX7RFmeW3e0iLr3l1JKJzwk2ZbPSPvg2eXT3dd9hIX/Q O9zXeVildwSIj+ZcHJSHLpmw6KmDcicN7fSg+3bydJTEXasEpv+cyagtHLWLNoEItxJP 6G0sGxuFKup2LQYghNkL66eq6aLVe2ncEmROVvsov1I5x42K73P6avjO5EjxlfIyS0Pk QM7BNtso8A6oTT28pN5J8tgFWxm79MlPKlwpkx9gCSFv9x6S/3x6NEWr3sldD+LzbUtQ Hw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 35th25ky83-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 05 Jan 2021 10:49:07 +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 2D4E1100038; Tue, 5 Jan 2021 10:49:07 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 1E435230519; Tue, 5 Jan 2021 10:49:07 +0100 (CET) Received: from localhost (10.75.127.46) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 5 Jan 2021 10:49:06 +0100 From: Amelie Delaunay To: Minas Harutyunyan , Felipe Balbi , Greg Kroah-Hartman CC: , , , Fabrice Gasnier , Amelie Delaunay Subject: [PATCH v2 1/3] usb: dwc2: set ahbcfg parameter for STM32MP15 OTG HS and FS Date: Tue, 5 Jan 2021 10:48:53 +0100 Message-ID: <20210105094855.30763-2-amelie.delaunay@foss.st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210105094855.30763-1-amelie.delaunay@foss.st.com> References: <20210105094855.30763-1-amelie.delaunay@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.46] X-ClientProxiedBy: SFHDAG4NODE2.st.com (10.75.127.11) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2021-01-05_01:2021-01-05,2021-01-05 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; }