From patchwork Thu Dec 12 17:35:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ying Hsu X-Patchwork-Id: 849828 Received: from mail-pj1-f45.google.com (mail-pj1-f45.google.com [209.85.216.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2F6FB222D67 for ; Thu, 12 Dec 2024 17:35:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734024961; cv=none; b=EW+zzReDWZDujzvCbSWe2P7b/RRezqQLCm/NSCrM2EH25Qk8csFfXz6spbdNw38Zdmk7fiZNtjtbpacHgApvwMEtahsFc1TPZ3D1X1EeBDzbZ5VNTD+SQ9IThghfQ0FOeepctaxvH+m2igLf1MkZ22/Rro4zgsbxzEcDw2mzRbk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734024961; c=relaxed/simple; bh=unHPHEf1EAAvyGEKP6w87OZccJqMDZhryTo+qSpX5ik=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=LG0PnTr+24yqA55zQMitOpL9TyfKgSHHEGPyYuzUTR7PdE80X/wMcsRzQFB3EGgjcu5T4u8yMWvfWJTaFsEkTugbNgvX1HMMSG3UeDMIuH3rFqbSrRlPdiOndjIOjoxSavn/zoZnBEXiUABmDgScnR5Jq6dHSkyZ8kyo4qYN7b0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=beyJgUWf; arc=none smtp.client-ip=209.85.216.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="beyJgUWf" Received: by mail-pj1-f45.google.com with SMTP id 98e67ed59e1d1-2efa806acfdso687183a91.2 for ; Thu, 12 Dec 2024 09:35:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1734024958; x=1734629758; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=hdytzyuSMv8Cb7sCazvlhn0z0OC1z8gCNLSykLKXbN8=; b=beyJgUWfBmmF/SA6rR5tVRX+yj/g6q+OkbkmfGHiRMM8o8IGk1tlCK+aajecwaN1dq A1QIXHAT+b9lsjd6DWVC5mm1Yr4lBlxyFYOzo364Ry9Sh+IRAr7bTi6VMVmVgljzFlgi SzFyZuEwJ5LiAPCTDdKYUgfgvyYCULmpJ/Lvo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734024958; x=1734629758; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=hdytzyuSMv8Cb7sCazvlhn0z0OC1z8gCNLSykLKXbN8=; b=vVTfPesUL9HLH29fuuB2z88we06AfdhjKtCOeQ4utujq38bnTWjhJqgxWi8vu3SLeh DaeoeLikxocQfs8tfBinNAtOHzm+eNSxpAfV702G0QKaxrTAclUnhAFIVuWGu62cqbC9 LGCFL+SavpcDxRp/6wXvWOYU4Ru1nslBBjwDRrdNXvoL3Auyq8dK0p/j77I5wG61LGVT WWTWN4ujdP0QlmWSKfOMCGv1OrsJo5I4pcgD2cgsgJslviOYTxwTj4XxBqaQsKXIs4bi TgLDhmNcpjXGXVIeNvLbiXyhGsLBOSQoQHuWxHnJHIxl5/oS+fB85R9CRUjvd8gs6gQ1 mtYA== X-Gm-Message-State: AOJu0YxRKO9lGHo+FvB564RFvViUM+vFkDIqx1ksH17arzigTm3PdCds SB+o5BXrsNqqJgInx0t1LXxbZFBtms/j7rDuV1cmr1F7cOt6mYeXP8nI04Oo58Q3RA17ELdgYhg = X-Gm-Gg: ASbGncteSzmIvw/Rz73MPTIjlhwzrExSWMcQd8Vj+RMYsRN4ipaE02xBoLvu0k6LYi0 dtmX8vLR3uqV8SPWno7FdnycEEUkSGLldFu9cLr6ApulbDEOPPdiq8PN2n+esg4JyVEEI5sqK2r nTgr8vfDN7vDobBxwKJtMglcIlsL3Wmb+AONBMPGUnSBtrhhjPRhBaQkJIcso2ExJ9VpkXo8L3A L9QNW/gGNg48TupZnPMeVAog3gAmaPgMc50ljLJo+nqALIp76tIQ0bwvkr+cw+WPdRW3CWB03Ky qB7MRbF7 X-Google-Smtp-Source: AGHT+IFgE5LN8snCnmFL+VXsBBoz1dVwQGLUBcwmNo4e91lh2BOf6JJ9b23cP2pLu6zhjZ3byDX9gw== X-Received: by 2002:a17:90a:ec83:b0:2ee:4b8f:a59c with SMTP id 98e67ed59e1d1-2f127fdbe3dmr10607801a91.22.1734024958406; Thu, 12 Dec 2024 09:35:58 -0800 (PST) Received: from superwings-p920.tpe.corp.google.com ([2401:fa00:1:17:42e:7922:6366:9f29]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2f142e40b3fsm1542714a91.49.2024.12.12.09.35.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Dec 2024 09:35:58 -0800 (PST) From: Ying Hsu To: linux-bluetooth@vger.kernel.org, luiz.dentz@gmail.com Cc: chromeos-bluetooth-upstreaming@chromium.org, Ying Hsu Subject: [PATCH] Bluetooth: btusb: add sysfs attribute to control USB alt setting Date: Fri, 13 Dec 2024 01:35:51 +0800 Message-ID: <20241212173551.192925-1-yinghsu@chromium.org> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 When a Bluetooth raw socket is open, the HCI event related to SCO connection changes are not dispatched to the hci_event module, and the underlying Bluetooth controller's USB Interface 1 will not be updated accordingly. This patch adds `isoc_alt` sysfs attribute, allowing user space to update the alternate setting of the USB interface alternate setting as needed. BUG=b:382526205 TEST=read and write /sys/class/bluetooth/hci0/isoc_alt Series-to: linux-bluetooth@vger.kernel.org Series-to: luiz.dentz@gmail.com Series-cc: chromeos-bluetooth-upstreaming@chromium.org Commit-notes: This commit has been tested on a chromebook with AX211. END Change-Id: Ifc708cc471a8834b344c26fce1ce2fe3e5992cad Signed-off-by: Ying Hsu --- drivers/bluetooth/btusb.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 279fe6c115fa..e8446f3e026e 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3645,6 +3645,32 @@ static const struct file_operations force_poll_sync_fops = { .llseek = default_llseek, }; +static ssize_t isoc_alt_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct btusb_data *data = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", data->isoc_altsetting); +} + +static ssize_t isoc_alt_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct btusb_data *data = dev_get_drvdata(dev); + int alt; + int ret; + + if (kstrtoint(buf, 10, &alt)) + return -EINVAL; + + ret = btusb_switch_alt_setting(data->hdev, alt); + return ret < 0 ? ret : count; +} + +static DEVICE_ATTR_RW(isoc_alt); + static int btusb_probe(struct usb_interface *intf, const struct usb_device_id *id) { @@ -4032,6 +4058,10 @@ static int btusb_probe(struct usb_interface *intf, debugfs_create_file("force_poll_sync", 0644, hdev->debugfs, data, &force_poll_sync_fops); + err = device_create_file(&intf->dev, &dev_attr_isoc_alt); + if (err) + goto out_free_dev; + return 0; out_free_dev: @@ -4052,6 +4082,8 @@ static void btusb_disconnect(struct usb_interface *intf) return; hdev = data->hdev; + device_remove_file(&intf->dev, &dev_attr_isoc_alt); + usb_set_intfdata(data->intf, NULL); if (data->isoc)