From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, 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 71AC9C433E6 for ; Fri, 5 Mar 2021 09:05:24 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E833364F44 for ; Fri, 5 Mar 2021 09:05:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E833364F44 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BmMhhSwKxE9WgTfxxS5U1KcVqvjhQVbDm6KZZAIRpjg=; b=NWkmhR4jSMyd+SQ+8Tj6uVinR E/symeQm1dTVeWLxbkr3AUv5k2wmt5MAq9W0EsjwmEh5dO++pJPGTZnWI1l3ukgKxlyI2MKhXWSNv Vz3tLTwoI8ejhhn4uZI/CairEquKXfcCAuaL7I12mmgWPVpuZIvrBMp1xotcZNZ4zGk/ydZIJ93zr md/MEJ//lmTwF0mgDeGsgcYMx9uyENHuep1MOEpUJAbgP8PAVypSlNV1r8+/zQuGCyodSqsizoD/T Eys3ebIPEkLoWLbgZE2R7nC+2VDcqjSeuRoT2ZJ3CizrsSeoq/5L0e4Y7J8IAtTesDrDmw3ymc2fs hZmWd1WOg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lI6NF-00E8Z4-EE; Fri, 05 Mar 2021 09:03:53 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lI6Ms-00E8QV-AG; Fri, 05 Mar 2021 09:03:34 +0000 X-UUID: a8d030cd3e4a4765985e8fe985fbc983-20210305 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=GIcGV2WEBcu+psy1pVpYvSZUUkHRlJ90T8HJ23kgdwg=; b=pego6Pr9DreJhNHN5CqThZP1N9vCz1yarPOStZ+74jRijN4RD6xI/w3YFAAQFzsR7xqB2oHeB7LtmtvoO0ZJ41QNzqinVJTyg1mzXeHslRvLFSd7y8+k/e3oKWALJAYEfUm2QMC9qnlcRwNF/mES9oU6yKffl35VA7ssW7Xu4ZQ=; X-UUID: a8d030cd3e4a4765985e8fe985fbc983-20210305 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 592638530; Fri, 05 Mar 2021 01:03:20 -0800 Received: from MTKMBS06N1.mediatek.inc (172.21.101.129) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 5 Mar 2021 01:03:18 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs06n1.mediatek.inc (172.21.101.129) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 5 Mar 2021 17:03:17 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 5 Mar 2021 17:03:16 +0800 From: Chunfeng Yun To: Mathias Nyman , Greg Kroah-Hartman , Ikjoon Jang CC: Chunfeng Yun , Matthias Brugger , , , , , Nicolas Boichat , Eddie Hung Subject: [PATCH 04/17] usb: xhci-mtk: add only one extra CS for FS/LS INTR Date: Fri, 5 Mar 2021 17:02:42 +0800 Message-ID: <1614934975-15188-4-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1614934975-15188-1-git-send-email-chunfeng.yun@mediatek.com> References: <1614934975-15188-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210305_090332_460016_8446221A X-CRM114-Status: GOOD ( 14.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In USB2 Spec: "11.18.5 TT Response Generation In general, there will be two (or more) complete-split transactions scheduled for a periodic endpoint. However, for interrupt endpoints, the maximum size of the full-/low-speed transaction guarantees that it can never require more than two complete-split transactions. Two complete-split transactions are only required when the transaction spans a microframe boundary." Due to the maxp is 64, and less then 188 (at most in one microframe), seems never span boundary, so use only one CS for FS/LS interrupt transfer, this will save some bandwidth. Signed-off-by: Chunfeng Yun --- drivers/usb/host/xhci-mtk-sch.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index e3b18dfca874..817ef2815e67 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -408,13 +408,11 @@ static int check_sch_tt(struct usb_device *udev, { struct mu3h_sch_tt *tt = sch_ep->sch_tt; u32 extra_cs_count; - u32 fs_budget_start; u32 start_ss, last_ss; u32 start_cs, last_cs; int i; start_ss = offset % 8; - fs_budget_start = (start_ss + 1) % 8; if (sch_ep->ep_type == ISOC_OUT_EP) { last_ss = start_ss + sch_ep->cs_count - 1; @@ -450,16 +448,14 @@ static int check_sch_tt(struct usb_device *udev, if (sch_ep->ep_type == ISOC_IN_EP) extra_cs_count = (last_cs == 7) ? 1 : 2; else /* ep_type : INTR IN / INTR OUT */ - extra_cs_count = (fs_budget_start == 6) ? 1 : 2; + extra_cs_count = 1; cs_count += extra_cs_count; if (cs_count > 7) cs_count = 7; /* HW limit */ - for (i = 0; i < cs_count + 2; i++) { - if (test_bit(offset + i, tt->ss_bit_map)) - return -ERANGE; - } + if (test_bit(offset, tt->ss_bit_map)) + return -ERANGE; sch_ep->cs_count = cs_count; /* one for ss, the other for idle */ -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel