From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Mon, 29 Jun 2026 16:29:55 +0200 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1weCzj-00B91t-1d for lore@lore.pengutronix.de; Mon, 29 Jun 2026 16:29:55 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:3::133]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1weCzi-0007q6-UV for lore@pengutronix.de; Mon, 29 Jun 2026 16:29:55 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Content-Transfer-Encoding:Content-Type:In-Reply-To:Cc:To:Subject:From: Reply-To:MIME-Version:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References:List-Owner; bh=+TgXFWnNhlNi6KFQHl1tZHfpcV72BflZqOVeQk0wQxY=; b=HElZrME8bOJBlQJ5fo0aaUGat/ bp9wgVvm+WLgraf0P3FL6M2toipbQIrsxcx6/Et6XhjZoJzV14iHacZ4kCtbMTQT4Uiofa1uHW6as oSO78NxODiGO03cD8TAVl6Lwa3cgl7HVFb4JXPaTzpMeW512nHxxxKBT//AKcdniUlNxSP138AZR+ gJEwwWlSWL1qScHQsi/0AWSVQMacvTpVVZeI9fww2/u9hnL5SLE7lV9ZSBU40FnPh2ayhYvJWDkeX D9ae0TD/TISE5Lb9FMMJ3Pj92xUdAEiJaDdQ0SdaI4TsdOVC0yisgaVDoC0LpbqVL/XGZqcQAsX/u WyT57JkQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1weCDr-0000000EmVL-2EKM; Mon, 29 Jun 2026 13:40:27 +0000 Received: from mx1.white.stw.pengutronix.de ([2a0a:edc0:0:b01:1d::107]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1weCDo-0000000EmUu-1bXR for barebox@lists.infradead.org; Mon, 29 Jun 2026 13:40:26 +0000 Received: from drehscheibe.grey.stw.pengutronix.de (drehscheibe.grey.stw.pengutronix.de [IPv6:2a0a:edc0:0:c01:1d::a2]) (Authenticated sender: relay-from-drehscheibe.grey.stw.pengutronix.de) by mx1.white.stw.pengutronix.de (Postfix) with ESMTPSA id B69C42002FE; Mon, 29 Jun 2026 15:40:21 +0200 (CEST) Received: from pty.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::c5]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1weCDl-005Fmd-28; Mon, 29 Jun 2026 15:40:21 +0200 Received: from sha by pty.whiteo.stw.pengutronix.de with local (Exim 4.98.2) (envelope-from ) id 1weCDl-00000005ilx-2MEA; Mon, 29 Jun 2026 15:40:21 +0200 From: "Sascha Hauer" To: "Johannes Schneider" Cc: barebox@lists.infradead.org, "Johannes Schneider" In-Reply-To: <20260627194324.2230643-7-johannes.schneider@leica-geosystems.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 29 Jun 2026 13:40:21 +0000 Message-Id: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260629_064024_597296_9A017466 X-CRM114-Status: UNSURE ( 8.14 ) X-CRM114-Notice: Please train this message. X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.1 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.2 Subject: Re: [PATCH v1 7/7] mci: imx-esdhc: support DMA in the i.MX8M PBL eMMC loader X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) On 2026-06-27 19:43, Johannes Schneider wrote: > The PBL eMMC loader was hardwired to PIO via esdhc_use_pio_mode(): IN_PBL > forced PIO unconditionally. PIO is slow -- on an i.MX8MM board loading the > ~1.6 MB next stage took ~559 ms; SDMA/ADMA2 do it in ~21 ms. For proper DMA support you'll need memory synchronization in form of dma_ma= p_* or dma_sync_* helpers which we do not have in PBL. Without them it won't work with MMU enabled. Have you tried enabling the MMU in the mean time? Th= is should give you decent performance even with PIO. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |