From patchwork Wed Oct 23 03:44:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: huanglei814 X-Patchwork-Id: 13846403 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.2]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 58DD520323; Wed, 23 Oct 2024 03:45:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.2 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729655131; cv=none; b=QL4H4GUjJ6KQm5lgXI2vz3l/WnleuweE9ufj65ow/TL5QKLeEdJ8nboyloNn2a/LvYAvfxRzknr2w30OgZ9OUem7JYJDxENHSeGXCE2h+PEiPBC1gpwC4UQzHF+UQHx7Y4SuG9bCoqyrcf29m65ZBwzL/uoR/OP2/xmkSJRmjeA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729655131; c=relaxed/simple; bh=ECzsDGr6vFEVPn6aqoqG+EAoMOQpMKvdM8XgMq02btM=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version:Content-Type; b=ncmXduJGzE83BuoXAaFr/4JGatc/HlHZ0v33XpJFNKAcpneI9jr99I+UKopONTSGitztW4ED7uWSPM+D3diq9qEOUVyiz1tJiZ/7nkrQIcKawUBDlkZwbqmmzAlPVJJxYSHlcu7PLRBR4FxiGxDIQQzzDRJM1V/2UOVL/T8kMEc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=o6CCnoHG; arc=none smtp.client-ip=220.197.31.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="o6CCnoHG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version: Content-Type; bh=aUZrrWFwQHgv9+Ik6AodjN8Lu6pe2mDlXP06fCRQf8o=; b=o6CCnoHG25vWrQgWFAmadUJpTKaR+hVuw0THMpa9gKv7uEqqqIn/GX2SwXXYxj W3sLU5M2/U5RrP5iNW+JvZGQswgM2pO44+5kcQrHtpzRqHhlNDZnexPVMrBELJSa ntBd0S2kUqmOJsx6YUPeUFV5GJwwwxNd3/qFhkjhAKfcY= Received: from localhost.localdomain (unknown [111.48.58.10]) by gzga-smtp-mtada-g0-2 (Coremail) with SMTP id _____wCn7zs6cRhnIERGCw--.47310S2; Wed, 23 Oct 2024 11:44:59 +0800 (CST) From: huanglei814 To: gregkh@linuxfoundation.org, mathias.nyman@intel.com Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, huanglei Subject: [PATCH v4] usb: core: adds support for PM control of specific USB dev skip suspend. Date: Wed, 23 Oct 2024 11:44:57 +0800 Message-Id: <20241023034457.13241-1-huanglei814@163.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: _____wCn7zs6cRhnIERGCw--.47310S2 X-Coremail-Antispam: 1Uf129KBjvJXoWxuryfZr48XFyDJw4DZw1DJrb_yoW5CFy8pF 4qyFW5Krs8Gr1I9wnFk3W8ZFn5Ww4Fkayjk3sakw1Ygw17J3s5Kw4ktF15uws3uryfAF17 tF47K3y5CFW7WFJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07UPcTdUUUUU= X-CM-SenderInfo: xkxd0wxohlmiqu6rljoofrz/1tbi7guB9mcYbWFoeAAAsx From: huanglei All USB devices are brought into suspend power state after system suspend. It is desirable for some specific manufacturers buses to keep their devices in normal state even after system suspend. Signed-off-by: huanglei --- v3->v4: - Cancel SUSPENDED state judgment when enter suspend，because udev will not enter. - Change "usb-skip-suspend" to "usb-never-suspend" - Change dev_err to dev_info. - Remove Kconfig option, it's redundant indeed. - Update commit message style. v2->v3: - Rebase and update commit message. v1->v2: - Change to bool type for skip_suspend. - Kconfig remove "default n", 'n' is the default. --- drivers/usb/core/driver.c | 8 ++++++++ drivers/usb/host/xhci-plat.c | 5 +++++ include/linux/usb.h | 7 +++++++ 3 files changed, 20 insertions(+) diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 0c3f12daac79..93137c7c34df 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -1583,6 +1583,11 @@ int usb_suspend(struct device *dev, pm_message_t msg) struct usb_device *udev = to_usb_device(dev); int r; + if (udev->bus->skip_suspend && (msg.event == PM_EVENT_SUSPEND)) { + dev_info(dev, "abort suspend\n"); + return 0; + } + unbind_no_pm_drivers_interfaces(udev); /* From now on we are sure all drivers support suspend/resume @@ -1619,6 +1624,9 @@ int usb_resume(struct device *dev, pm_message_t msg) struct usb_device *udev = to_usb_device(dev); int status; + if (udev->bus->skip_suspend && (msg.event == PM_EVENT_RESUME)) + return 0; + /* For all calls, take the device back to full power and * tell the PM core in case it was autosuspended previously. * Unbind the interfaces that will need rebinding later, diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index ecaa75718e59..35062aa19a32 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -265,6 +265,11 @@ int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const s if (device_property_read_bool(tmpdev, "xhci-skip-phy-init-quirk")) xhci->quirks |= XHCI_SKIP_PHY_INIT; + if (device_property_read_bool(tmpdev, "usb-never-suspend")) { + hcd_to_bus(hcd)->skip_suspend = true; + hcd_to_bus(xhci->shared_hcd)->skip_suspend = true; + } + device_property_read_u32(tmpdev, "imod-interval-ns", &xhci->imod_interval); } diff --git a/include/linux/usb.h b/include/linux/usb.h index 672d8fc2abdb..c854d1f622ec 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -487,6 +487,13 @@ struct usb_bus { struct mon_bus *mon_bus; /* non-null when associated */ int monitored; /* non-zero when monitored */ #endif + + bool skip_suspend; /* All USB devices are brought into suspend + * power state after system suspend. It is + * desirable for some specific manufacturers + * buses to keep their devices in normal + * state even after system suspend. + */ }; struct usb_dev_state;