From patchwork Fri Aug 5 06:03:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12936862 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 87C95C00140 for ; Fri, 5 Aug 2022 06:15:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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:In-Reply-To:References: List-Owner; bh=kyG/WX23hE7Vso6zyIcSmcO2gRXTlxX2HqixEBBDuNE=; b=DTIXd+wgz2ynZN uQxe7lzXGmInTSYGjOr81U3F7fW7BPOwIoXdT21Mv/7oGtGGnZTZX+p5ji0AO9r89Yqw8UJ8d1bdu OS82WWpcRU1LGJBLP/CYShXFu+hrwxZLoWdpqZMBqiGievP4+k/lTsPRvUewnt0Ee/RcmLddQZimP iNr+HkHYU3TxbAwDSx+n+bBfzki6mpCJqJxq6RrQuTHEuTxN5SvqSiQN2LX16/EjcOqzU9eaIPKZb xj4cS60Cu9HaP/jB1h42VjKxYuHZqDjv3mV55OPO5K0RpOf9gyEMciovLA9QvFx0ywkOZSjIrwd5s Ky+o4Ms8k+J4P+GkvXhQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oJqbK-00CIAu-PM; Fri, 05 Aug 2022 06:14:26 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oJqbF-00CI7I-8h; Fri, 05 Aug 2022 06:14:22 +0000 X-UUID: 664f19bf3e324bcba059c2c4eb77f81f-20220804 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8,REQID:bfb790e2-aa57-43ef-86b1-4c37d9d3be78,OB:0,LO B:0,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:5 X-CID-META: VersionHash:0f94e32,CLOUDID:de0400ae-9535-44a6-aa9b-7f62b79b6ff6,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: 664f19bf3e324bcba059c2c4eb77f81f-20220804 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1854633892; Thu, 04 Aug 2022 23:14:04 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Fri, 5 Aug 2022 14:03:30 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Fri, 5 Aug 2022 14:03:30 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman CC: Chunfeng Yun , Mathias Nyman , Matthias Brugger , Ikjoon Jang , , , , , Eddie Hung Subject: [PATCH v2 1/2] usb: xhci-mtk: relax TT periodic bandwidth allocation Date: Fri, 5 Aug 2022 14:03:27 +0800 Message-ID: <20220805060328.6189-1-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220804_231421_331391_97713C71 X-CRM114-Status: GOOD ( 13.97 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Currently uses the worst case byte budgets on FS/LS bus bandwidth, for example, for an isochronos IN endpoint with 192 bytes budget, it will consume the whole 5 uframes(188 * 5) while the actual FS bus budget should be just 192 bytes. It cause that many usb audio headsets with 3 interfaces (audio input, audio output, and HID) cannot be configured. To improve it, changes to use "approximate" best case budget for FS/LS bandwidth management. For the same endpoint from the above example, the approximate best case budget is now reduced to (188 * 2) bytes. Signed-off-by: Chunfeng Yun --- v2: change commit message --- drivers/usb/host/xhci-mtk-sch.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index 06a6b19acaae..a17bc584ee99 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -425,7 +425,6 @@ static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset) static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) { - u32 extra_cs_count; u32 start_ss, last_ss; u32 start_cs, last_cs; @@ -461,18 +460,12 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) if (last_cs > 7) return -ESCH_CS_OVERFLOW; - 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 = 1; - - cs_count += extra_cs_count; if (cs_count > 7) cs_count = 7; /* HW limit */ sch_ep->cs_count = cs_count; - /* one for ss, the other for idle */ - sch_ep->num_budget_microframes = cs_count + 2; + /* ss, idle are ignored */ + sch_ep->num_budget_microframes = cs_count; /* * if interval=1, maxp >752, num_budge_micoframe is larger