From patchwork Wed Jun 29 02:13:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12899184 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 72099C433EF for ; Wed, 29 Jun 2022 02:48:12 +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=djKpnTKQHuKo6EB/2uTqaB5Xo40mG1hMfSLJuTVbhkE=; b=JUWzqSxdHxNUg5 dyLBceICRnvPP38WGy5oemS79+f9A92Hu5qrc+JNjByhNiLaBTpPizQChdH81W+1uV9dGkgE/XAIC xSKp20Jd1Ic477MFjiKU5jJ+avg3ix1/EIPWUd0egt6bY6JOIVvxgtGVFxZQtLiWbvj1WzvigmKNL JLxUs/e4oRBuny1Xk3gn1M6FYL1uQs7qIds6Rx3vddmz/hNNzCHeuPS8/qmM7YgtWv4gW7PvlfJmp lJFmjvtQAUz6X8UAA8S0qVFUXJQbE2f7pcKV6pqOx2P/agAcEgDi00TOb8s0wPywjUTIj/B1WEtto cYvBeM8HneGTCCt+84qw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o6NgM-0097Bl-CV; Wed, 29 Jun 2022 02:43:58 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o6NgI-0097Ab-Hp; Wed, 29 Jun 2022 02:43:56 +0000 X-UUID: 5f0c7a6e3d614756a0283d4f41a23d6c-20220628 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.7,REQID:03aa571e-7d37-4d59-acfa-1102485cda9a,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:87442a2,CLOUDID:53a1e762-0b3f-4b2c-b3a6-ed5c044366a0,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: 5f0c7a6e3d614756a0283d4f41a23d6c-20220628 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 350736381; Tue, 28 Jun 2022 19:43:42 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.186) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Wed, 29 Jun 2022 10:13:07 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Wed, 29 Jun 2022 10:13:07 +0800 From: Chunfeng Yun To: Felipe Balbi CC: Greg Kroah-Hartman , Matthias Brugger , Pavel Hofman , "Julian Scheel" , Ruslan Bilovol , "Chunfeng Yun" , Yunhao Tian , xin lin , , , , Subject: [PATCH v2] usb: gadget: f_uac1: add interface association descriptor Date: Wed, 29 Jun 2022 10:13:04 +0800 Message-ID: <20220629021304.21725-1-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-20220628_194354_636488_34E934F3 X-CRM114-Status: GOOD ( 15.21 ) 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 From: xin lin When we want to use a composite device that supports UVC, UAC1 and ADB at the same time, encounter that UAC1 can't work when connected to windows 10 system. From the online documents of microsoft, "overview of enumeration of interface collections on usb composite devices", it recommends that vendors use IADs (interface association descriptor) to define interface collections. After addding IAD, we can fix the issue. Signed-off-by: xin lin Signed-off-by: Chunfeng Yun Reviewed-by: AngeloGioacchino Del Regno --- v2: modify commit log suggested by Greg --- drivers/usb/gadget/function/f_uac1.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c index 6f0e1d803dc2..8390207bc513 100644 --- a/drivers/usb/gadget/function/f_uac1.c +++ b/drivers/usb/gadget/function/f_uac1.c @@ -71,6 +71,17 @@ static inline struct f_uac1_opts *g_audio_to_uac1_opts(struct g_audio *audio) * ALSA_Playback -> IT_3 -> OT_4 -> USB-IN */ +static struct usb_interface_assoc_descriptor iad_desc = { + .bLength = sizeof(iad_desc), + .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, + + .bFirstInterface = 0, + .bInterfaceCount = 3, + .bFunctionClass = USB_CLASS_AUDIO, + .bFunctionSubClass = 0, + .bFunctionProtocol = UAC_VERSION_1, +}; + /* B.3.1 Standard AC Interface Descriptor */ static struct usb_interface_descriptor ac_interface_desc = { .bLength = USB_DT_INTERFACE_SIZE, @@ -259,6 +270,7 @@ static struct uac_iso_endpoint_descriptor as_iso_in_desc = { }; static struct usb_descriptor_header *f_audio_desc[] = { + (struct usb_descriptor_header *)&iad_desc, (struct usb_descriptor_header *)&ac_interface_desc, (struct usb_descriptor_header *)&ac_header_desc, @@ -293,6 +305,7 @@ static struct usb_descriptor_header *f_audio_desc[] = { }; enum { + STR_ASSOC, STR_AC_IF, STR_USB_OUT_IT, STR_USB_OUT_IT_CH_NAMES, @@ -310,6 +323,7 @@ enum { static struct usb_string strings_uac1[] = { /* [STR_AC_IF].s = DYNAMIC, */ + [STR_ASSOC].s = "Source/Sink", [STR_USB_OUT_IT].s = "Playback Input terminal", [STR_USB_OUT_IT_CH_NAMES].s = "Playback Channels", [STR_IO_OUT_OT].s = "Playback Output terminal", @@ -1058,6 +1072,7 @@ static void setup_descriptor(struct f_uac1_opts *opts) as_out_header_desc.bTerminalLink = usb_out_it_desc.bTerminalID; as_in_header_desc.bTerminalLink = usb_in_ot_desc.bTerminalID; + iad_desc.bInterfaceCount = 1; ac_header_desc->wTotalLength = cpu_to_le16(ac_header_desc->bLength); if (EPIN_EN(opts)) { @@ -1068,6 +1083,7 @@ static void setup_descriptor(struct f_uac1_opts *opts) if (FUIN_EN(opts)) len += in_feature_unit_desc->bLength; ac_header_desc->wTotalLength = cpu_to_le16(len); + iad_desc.bInterfaceCount++; } if (EPOUT_EN(opts)) { u16 len = le16_to_cpu(ac_header_desc->wTotalLength); @@ -1077,9 +1093,11 @@ static void setup_descriptor(struct f_uac1_opts *opts) if (FUOUT_EN(opts)) len += out_feature_unit_desc->bLength; ac_header_desc->wTotalLength = cpu_to_le16(len); + iad_desc.bInterfaceCount++; } i = 0; + f_audio_desc[i++] = USBDHDR(&iad_desc); f_audio_desc[i++] = USBDHDR(&ac_interface_desc); f_audio_desc[i++] = USBDHDR(ac_header_desc); @@ -1217,6 +1235,7 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f) } } + iad_desc.iFunction = us[STR_ASSOC].id; ac_interface_desc.iInterface = us[STR_AC_IF].id; usb_out_it_desc.iTerminal = us[STR_USB_OUT_IT].id; usb_out_it_desc.iChannelNames = us[STR_USB_OUT_IT_CH_NAMES].id; @@ -1302,6 +1321,8 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f) status = usb_interface_id(c, f); if (status < 0) goto err_free_fu; + + iad_desc.bFirstInterface = status; ac_interface_desc.bInterfaceNumber = status; uac1->ac_intf = status; uac1->ac_alt = 0;