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,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 2B4FCC56202 for ; Mon, 23 Nov 2020 08:56:42 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (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 5431520731 for ; Mon, 23 Nov 2020 08:56:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="mtmJbzo0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5431520731 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id B3C361688; Mon, 23 Nov 2020 09:55:49 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz B3C361688 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1606121799; bh=bM4jYkikz7Y+RT2LwD0nC/BvG51BN4zANxI85oTXYk4=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=mtmJbzo0Apjloog7XpkfmNDV0nHC/J9oV9dnTdKWby9d+gROY6kEp0ckxk52fFLWR saJ/inKX3vbQjUdYarUdSlcR3uYAhrBUyuDpfZsGkxte5nZ0LxmgtwrwGNT8bciepF vtGsb8MOYsXFNOo+/0IbPzVToydhGxicdTWdyFj8= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 498A5F80517; Mon, 23 Nov 2020 09:54:14 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 012D0F8050F; Mon, 23 Nov 2020 09:54:09 +0100 (CET) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id C7A8FF80268 for ; Mon, 23 Nov 2020 09:53:57 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz C7A8FF80268 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 1118AAF8D; Mon, 23 Nov 2020 08:53:57 +0000 (UTC) From: Takashi Iwai To: alsa-devel@alsa-project.org Subject: [PATCH 04/41] ALSA: usb-audio: Check implicit feedback EP generically for UAC2 Date: Mon, 23 Nov 2020 09:53:10 +0100 Message-Id: <20201123085347.19667-5-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20201123085347.19667-1-tiwai@suse.de> References: <20201123085347.19667-1-tiwai@suse.de> Cc: Matwey Kornilov , Dylan Robinson , Keith Milner X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" It seems that many UAC2 devices are with the implicit feedback, but they couldn't be probed properly because the assumption the driver takes currently isn't applied: they have the single endpoint for both data and implicit-fb streams, while we checked only the classical sync endpoints assigned to the next altsetting in the same interface. This patch extends the search to match with those typical cases where the implicit fb stream is found in the next interface number. While we're at it, slightly refactor the code, not returning 0/-ERROR but use the standard bool to success/failur, which is more intuitive in this particular case. Reported-by: Dylan Robinson Tested-by: Keith Milner Tested-by: Dylan Robinson Signed-off-by: Takashi Iwai --- sound/usb/pcm.c | 83 +++++++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 66 insertions(+), 17 deletions(-) diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index 380d7275d187..2b11c2c837bf 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -272,33 +272,70 @@ static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream) return 0; } -static int search_roland_implicit_fb(struct usb_device *dev, int ifnum, - unsigned int altsetting, - struct usb_host_interface **alts, - unsigned int *ep) +/* Check whether the given iface:altsetting points to an implicit fb source */ +static bool search_generic_implicit_fb(struct usb_device *dev, int ifnum, + unsigned int altsetting, + struct usb_host_interface **altsp, + unsigned int *ep) { struct usb_interface *iface; + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + struct usb_endpoint_descriptor *epd; + + iface = usb_ifnum_to_if(dev, ifnum); + if (!iface) + return false; + alts = usb_altnum_to_altsetting(iface, altsetting); + if (!alts) + return false; + altsd = get_iface_desc(alts); + if (altsd->bInterfaceClass != USB_CLASS_AUDIO || + altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING || + altsd->bInterfaceProtocol != UAC_VERSION_2 || + altsd->bNumEndpoints < 1) + return false; + epd = get_endpoint(alts, 0); + if (!usb_endpoint_is_isoc_in(epd) || + (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) != + USB_ENDPOINT_USAGE_IMPLICIT_FB) + return false; + *ep = epd->bEndpointAddress; + *altsp = alts; + return true; +} + +/* Like the function above, but specific to Roland with vendor class and hack */ +static bool search_roland_implicit_fb(struct usb_device *dev, int ifnum, + unsigned int altsetting, + struct usb_host_interface **altsp, + unsigned int *ep) +{ + struct usb_interface *iface; + struct usb_host_interface *alts; struct usb_interface_descriptor *altsd; struct usb_endpoint_descriptor *epd; iface = usb_ifnum_to_if(dev, ifnum); - if (!iface || iface->num_altsetting < altsetting + 1) - return -ENOENT; - *alts = &iface->altsetting[altsetting]; - altsd = get_iface_desc(*alts); - if (altsd->bAlternateSetting != altsetting || - altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC || + if (!iface) + return false; + alts = usb_altnum_to_altsetting(iface, altsetting); + if (!alts) + return false; + altsd = get_iface_desc(alts); + if (altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC || (altsd->bInterfaceSubClass != 2 && - altsd->bInterfaceProtocol != 2 ) || + altsd->bInterfaceProtocol != 2) || altsd->bNumEndpoints < 1) - return -ENOENT; - epd = get_endpoint(*alts, 0); + return false; + epd = get_endpoint(alts, 0); if (!usb_endpoint_is_isoc_in(epd) || (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) != USB_ENDPOINT_USAGE_IMPLICIT_FB) - return -ENOENT; + return false; *ep = epd->bEndpointAddress; - return 0; + *altsp = alts; + return true; } /* Setup an implicit feedback endpoint from a quirk. Returns 0 if no quirk @@ -375,6 +412,19 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs, return 0; } + /* Generic UAC2 implicit feedback */ + if (attr == USB_ENDPOINT_SYNC_ASYNC && + altsd->bInterfaceClass == USB_CLASS_AUDIO && + altsd->bInterfaceProtocol == UAC_VERSION_2 && + altsd->bNumEndpoints == 1) { + ifnum = altsd->bInterfaceNumber + 1; + if (search_generic_implicit_fb(dev, ifnum, + altsd->bAlternateSetting, + &alts, &ep)) + goto add_sync_ep; + } + + /* Roland/BOSS implicit feedback with vendor spec class */ if (attr == USB_ENDPOINT_SYNC_ASYNC && altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && altsd->bInterfaceProtocol == 2 && @@ -382,9 +432,8 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs, USB_ID_VENDOR(subs->stream->chip->usb_id) == 0x0582 /* Roland */ && search_roland_implicit_fb(dev, altsd->bInterfaceNumber + 1, altsd->bAlternateSetting, - &alts, &ep) >= 0) { + &alts, &ep)) goto add_sync_ep; - } /* No quirk */ return 0; -- 2.16.4