From patchwork Thu Dec 1 10:38:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Deren Wu X-Patchwork-Id: 13061178 X-Patchwork-Delegate: nbd@nbd.name 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45386C47088 for ; Thu, 1 Dec 2022 10:39:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230354AbiLAKjZ (ORCPT ); Thu, 1 Dec 2022 05:39:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230246AbiLAKjX (ORCPT ); Thu, 1 Dec 2022 05:39:23 -0500 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A54DCDF81 for ; Thu, 1 Dec 2022 02:39:17 -0800 (PST) X-UUID: 4c6f9439fc914f8c9da433d9dab645a7-20221201 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=teGRJgvfH/U8wtkf9vgUtG+mrCTWmY4r8TQDwB18MFo=; b=gx9CNyDgbNQ0YQTpYYhFf5PQ5HRIp9ut5N1xHNMRKQLwhNKpfrNdo7FsYTXJrnFWEphJSiZS9MrOIzYuXG8DifZDjLiCRf3t7rBzrBc1MjZruMVAoAYazodAvmX7pJFLZk5IF8//66bcwoZ8Eevr0XvPtNejfK+tndrwGJDv2d4=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.14,REQID:9031e03f-2276-4814-b93f-5140ac214123,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:dcaaed0,CLOUDID:3c0c6230-2938-482e-aafd-98d66723b8a9,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 X-UUID: 4c6f9439fc914f8c9da433d9dab645a7-20221201 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1697980329; Thu, 01 Dec 2022 18:39:11 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) 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; Thu, 1 Dec 2022 18:39:10 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Thu, 1 Dec 2022 18:39:10 +0800 From: Deren Wu To: Felix Fietkau , Lorenzo Bianconi CC: Sean Wang , Soul Huang , YN Chen , Leon Yen , "Eric-SY Chang" , Deren Wu , KM Lin , Robin Chiu , CH Yeh , Posh Sun , Stella Chang , Evelyn Tsai , "Ryder Lee" , Shayne Chen , linux-wireless , linux-mediatek , Deren Wu Subject: [PATCH v3] wifi: mt76: mt7921e: add pci .shutdown() support Date: Thu, 1 Dec 2022 18:38:42 +0800 Message-ID: X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Leon Yen Some combinations of hosts cannnot detect mt7921e after reboot. The interoperability issue is caused by the status mismatch between host and chip fw. In such cases, the driver should stop chip activities and reset chip to default state before reboot. Suggested-by: angelogioacchino.delregno@collabora.com Co-developed-by: Deren Wu Signed-off-by: Deren Wu Signed-off-by: Leon Yen --- v3: - use pci .shutdown() instead of reboot notification - add suggested by Angelo v2: add reboot notification block in mt76 --- drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c index 28342ec940f0..cb72ded37256 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c @@ -507,6 +507,21 @@ static int mt7921_pci_resume(struct device *device) return err; } +static void mt7921_pci_shutdown(struct pci_dev *pdev) +{ + struct mt76_dev *mdev = pci_get_drvdata(pdev); + struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76); + struct mt76_connac_pm *pm = &dev->pm; + + cancel_delayed_work_sync(&pm->ps_work); + cancel_work_sync(&pm->wake_work); + + /* chip cleanup before reboot */ + mt7921_mcu_drv_pmctrl(dev); + mt7921_dma_cleanup(dev); + mt7921_wfsys_reset(dev); +} + static DEFINE_SIMPLE_DEV_PM_OPS(mt7921_pm_ops, mt7921_pci_suspend, mt7921_pci_resume); static struct pci_driver mt7921_pci_driver = { @@ -514,6 +529,7 @@ static struct pci_driver mt7921_pci_driver = { .id_table = mt7921_pci_device_table, .probe = mt7921_pci_probe, .remove = mt7921_pci_remove, + .shutdown = mt7921_pci_shutdown, .driver.pm = pm_sleep_ptr(&mt7921_pm_ops), };