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[2620:137:e000::1:20]) by mx.google.com with ESMTP id gn17-20020a1709070d1100b007824786a7easi10168763ejc.724.2022.11.07.03.08.46; Mon, 07 Nov 2022 03:09:11 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=TKH12svC; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231653AbiKGLHp (ORCPT + 99 others); Mon, 7 Nov 2022 06:07:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231356AbiKGLHc (ORCPT ); Mon, 7 Nov 2022 06:07:32 -0500 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7256218364; Mon, 7 Nov 2022 03:07:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1667819251; x=1699355251; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gbTRCkxxLdOZW1y6aGgrb7XRmU8BTA5iNZdcQ5OXGmE=; b=TKH12svCttUpMooVWeFxd0W2LsXEOWYvyXaD0JViSkjlGlTvo4q/CgO0 kLPRU1255lpL/Kiqa7ZtfLvRNtX/yCwjHF5simTlPezMC9hmC25W9QF0h z+KDN7btn4j5mZnJ02w7AgftCYk+YJr/RHnhHil78tlUUXbGsOPQoEiOw efwkvLeX/se+ZwYSN7HN3TCkGvTHLOpETc2pKmYFHPsnQzuka21YLNHah QZiv72y2wEJlAIEJM8Y27as5KA4mQgmeog4/RyiqpVc6yR0hUeqsthT/x vZ4B0g57V1tsWq9zHYtGzb6M05z+w8OoIQzX+qxabG/5MJeYP0Q82jVZr A==; X-IronPort-AV: E=McAfee;i="6500,9779,10523"; a="290773035" X-IronPort-AV: E=Sophos;i="5.96,143,1665471600"; d="scan'208";a="290773035" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2022 03:07:29 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10523"; a="586932376" X-IronPort-AV: E=Sophos;i="5.96,143,1665471600"; d="scan'208";a="586932376" Received: from gschoede-mobl1.ger.corp.intel.com (HELO ijarvine-MOBL2.ger.corp.intel.com) ([10.252.46.211]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2022 03:07:26 -0800 From: =?utf-8?q?Ilpo_J=C3=A4rvinen?= To: Andy Shevchenko , Greg Kroah-Hartman , Jiri Slaby , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?Ilpo_J=C3=A4rvinen?= Cc: stable@vger.kernel.org, Wentong Wu , Srikanth Thokala , Aman Kumar Subject: [PATCH 3/4] serial: 8250_lpss: Use 16B DMA burst with Elkhart Lake Date: Mon, 7 Nov 2022 13:07:07 +0200 Message-Id: <20221107110708.58223-4-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20221107110708.58223-1-ilpo.jarvinen@linux.intel.com> References: <20221107110708.58223-1-ilpo.jarvinen@linux.intel.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748835344626194708?= X-GMAIL-MSGID: =?utf-8?q?1748835344626194708?= Configure DMA to use 16B burst size with Elkhart Lake. This makes the bus use more efficient and works around an issue which occurs with the previously used 1B. Fixes: 0a9410b981e9 ("serial: 8250_lpss: Enable DMA on Intel Elkhart Lake") Cc: # serial: 8250_lpss: Configure DMA also w/o DMA filter Reported-by: Wentong Wu Co-developed-by: Srikanth Thokala Signed-off-by: Srikanth Thokala Co-developed-by: Aman Kumar Signed-off-by: Aman Kumar Signed-off-by: Ilpo Järvinen --- I know the list of Co-dev-bys & Sob seems a bit odd for a oneliner. The reason is that I cleaned up this from a more complex patch using the earlier change that I authored myself so only this oneliner remained in this patch. --- drivers/tty/serial/8250/8250_lpss.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index ed281445a97d..e0b4e1446eac 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -174,6 +174,8 @@ static int ehl_serial_setup(struct lpss8250 *lpss, struct uart_port *port) */ up->dma = dma; + lpss->dma_maxburst = 16; + port->set_termios = dw8250_do_set_termios; return 0;