From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 71CD1214A6A; Thu, 7 Aug 2025 05:54:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754546044; cv=none; b=oHIQS2jQgbzpt+VoQKbh8Gfqft7ENoapmc80vod8UASdPHhVlSCqGNKJyYacEAowpoYOJ62EHsin9kPssVOd9qNZpl2s8Mz7lkIq2ITy/CNY2PbSQBXd7TNO8blvUpwRnuM10k2KLjdA2z5yK6MZ7WhVBzlUDiOhOB683PRpkeU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754546044; c=relaxed/simple; bh=oi7o9HiifSyEnpugZvUbXcbZQUeOPIb3s/qYcSGQzds=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ec3apMhoZKTg4j4u1lxeA+Uaf47XRI6v1UoaWo41v/v+vCad+kYnjdfiZDDa36rpHXffJUK5mzApJHq7dYE/w5sRee9bFPF7QKFbDmCT/6cXjfRaaYCUmC5qHSjbqW3DCgx1H7j2C77YOj63/GiVeUdPAbi6N1v0HBJ7aUo5ecY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=keZeezJU; arc=none smtp.client-ip=198.175.65.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="keZeezJU" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1754546043; x=1786082043; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oi7o9HiifSyEnpugZvUbXcbZQUeOPIb3s/qYcSGQzds=; b=keZeezJUTSreqjtBPLGYBYgad8/fF4n4EQeP31QC8oIvDwkauLy8wGXq ykoS+FUV91CMlbGIKmMxU+DC4eCE2y7igk/ZtBxSmELK4xhgOQExdFLFQ 2qsoLfKj0gVzupzI6rDyv8UEU0yxjkYUFQ/CeAIhMsmk08H1igvrIIUt9 tcP6wtHplfspt8S40oERJvXuyZqlMv/gelquTX2yBggRxqAK1FmY1EEiT 1QRE+AsekCPGXxe+9q+2LQ0cXcs/ZF3Jk7dVe+wrNsoFAEDIK56vVA+Qt LqKTsF2X+DhSS9oWgPyvo+gvGJARX55dq8SF9Hm7bTZ6qjbhTJoC0RwxI A==; X-CSE-ConnectionGUID: l73Yy5x8TPCCIvyur5Ln/A== X-CSE-MsgGUID: DkpCKOb9TqCJPkRRj8fJVA== X-IronPort-AV: E=McAfee;i="6800,10657,11514"; a="60501945" X-IronPort-AV: E=Sophos;i="6.17,271,1747724400"; d="scan'208";a="60501945" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa107.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2025 22:54:00 -0700 X-CSE-ConnectionGUID: RMGVNd8BTAiqGS00ZRjDzA== X-CSE-MsgGUID: 3b7YNV5SQhCHuJNKIODRgQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.17,271,1747724400"; d="scan'208";a="202144609" Received: from mjarzebo-mobl1.ger.corp.intel.com (HELO kekkonen.fi.intel.com) ([10.245.244.255]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Aug 2025 22:53:58 -0700 Received: from punajuuri.localdomain (unknown [192.168.240.130]) by kekkonen.fi.intel.com (Postfix) with ESMTP id 38AC411FC4F; Thu, 7 Aug 2025 08:53:55 +0300 (EEST) Received: from sailus by punajuuri.localdomain with local (Exim 4.96) (envelope-from ) id 1ujtZc-005H1A-0n; Thu, 07 Aug 2025 08:53:56 +0300 Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo From: Sakari Ailus To: linux-usb@vger.kernel.org Cc: linux-media@vger.kernel.org, gregkh@linuxfoundation.org, laurent.pinchart@ideasonboard.com, hdegoede@redhat.com, Thinh.Nguyen@synopsys.com, Amardeep Rai , Kannappan R , Mathias Nyman , Alan Stern Subject: [PATCH v3 3/4] USB: Add a function to obtain USB version independent maximum bpi value Date: Thu, 7 Aug 2025 08:53:54 +0300 Message-Id: <20250807055355.1257029-4-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250807055355.1257029-1-sakari.ailus@linux.intel.com> References: <20250807055355.1257029-1-sakari.ailus@linux.intel.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "Rai, Amardeep" Add usb_endpoint_max_isoc_bpi() to obtain maximum bytes per interval for isochronous endpoints in a USB version independent way. Signed-off-by: Rai, Amardeep Signed-off-by: Mathias Nyman Co-developed-by: Sakari Ailus Signed-off-by: Sakari Ailus Reviewed-by: Hans de Goede --- include/linux/usb.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/include/linux/usb.h b/include/linux/usb.h index 535ac37198a1..da0f51dfe15f 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -2049,6 +2049,37 @@ static inline int usb_translate_errors(int error_code) } } +/** + * usb_endpoint_max_isoc_bpi - Get maximum isochronous transfer bytes per interval + * @dev: The USB device + * @ep: The endpoint + * + * Returns: the maximum number of bytes isochronous endpoint @endpoint can + * transfer in during a service interval, or 0 for non-isochronous endpoints. + */ +static inline u32 usb_endpoint_max_isoc_bpi(struct usb_device *dev, + const struct usb_host_endpoint *ep) +{ + if (usb_endpoint_type(&ep->desc) != USB_ENDPOINT_XFER_ISOC) + return 0; + + switch (dev->speed) { + case USB_SPEED_SUPER_PLUS: + if (USB_SS_SSP_ISOC_COMP(ep->ss_ep_comp.bmAttributes)) + return le32_to_cpu(ep->ssp_isoc_ep_comp.dwBytesPerInterval); + fallthrough; + case USB_SPEED_SUPER: + return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval); + case USB_SPEED_HIGH: + if (ep->eusb2_isoc_ep_comp.bDescriptorType && + !usb_endpoint_maxp(&ep->desc) && usb_endpoint_dir_in(&ep->desc)) + return le32_to_cpu(ep->eusb2_isoc_ep_comp.dwBytesPerInterval); + fallthrough; + default: + return usb_endpoint_maxp(&ep->desc) * usb_endpoint_maxp_mult(&ep->desc); + } +} + /* Events from the usb core */ #define USB_DEVICE_ADD 0x0001 #define USB_DEVICE_REMOVE 0x0002 -- 2.39.5