From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f47.google.com (mail-ot1-f47.google.com [209.85.210.47]) (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 2CB53309EFC for ; Sat, 25 Apr 2026 19:51:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.47 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777146682; cv=none; b=PkRQXcJx/7Yz9AsHreYyV3SYJ/6/KQ1j2RaNsBhxuTt0pdlYXQp+xUbLPIxRwM7Y69uwXkojBl1aOFGPs+097hVW/eON01o44WcTWvHMlTb9bQvhpoARhXsMiy1yo6efSLCsMDudEihyZDv5PCNfvGRSQsI1dhbb7ZGIZi9e6f0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777146682; c=relaxed/simple; bh=LX5Mcz5GGYBCYfpheEJsaCYC7bhdMqvnWk7vmtITpDw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=a6lwsLmKJEaxQYYzaXZbUlcuyxdsMVDyuqb8UKddwuISM0wUOLNzdNFYczvcwrd4TGcgY3yi33BkKrV/9h2GmVrXXvQei3iLQNjbqavLsHT+UkZjRpshLhdAYDAIYj/iGZKrdBPXmKuvtIPzG0CKOFoVWpWmhHihfQzD4L1YUyo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.210.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-ot1-f47.google.com with SMTP id 46e09a7af769-7dbcb467f2bso8198342a34.3 for ; Sat, 25 Apr 2026 12:51:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777146680; x=1777751480; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=YTztHk/94U1DhMDW7lcOWTq/ciqorsxjY2G0pZWTPC8=; b=Du7kSw8TeYq5MVfcCVhUVGKx+YRAYxqMNQB1zqaABYbzPsbm/YsgWT8GjJw0wkUSy3 xsxn2qLZDklKRobQnRBA1cBa1Fms+LWTEa9zHr3p3Tw9LSRef9WMA4Nl0f5EAWF+U7D0 m6zFc3aEzIf2Ltrna8ov9QekssP/1vRqpE5in7fEtHkTGxp+5He471xlaJRF+YT7D2gR 9ysB8bxk1Fu4+seonXVycvtLI7G3AwGe5Ecb7Uk3nTyvJcogNFoqZ/oR/UDqXsK6hbRZ euNjG1MwRYh3YICz4YzZxzlwEIcBd6u6mzImwwNyF4G9PXcWfNvYzLtULCeEKnaRi/t7 WMjQ== X-Gm-Message-State: AOJu0Yxjp78aEEW+KYPVmtLRGmZqZnONIbAo4vJhLEt3509S6sVHDqy6 cBmi5yxNPFgnB2BcW5LwCy36q2R8TLfh2kwzLvqUvmzUjJZtdMyMmuTK X-Gm-Gg: AeBDietyJ0+gruj0cfqfuv+rPeAGLo68XeoLk3RMGH3PEuRzxEIx/299FGRORVOMC4q /O/kGKAX4p1+gvY2DSTAdeI6USfpffVA6nl64+XqJrrCxLM0w7QAZpYWkJ8Al0s2hoKnaJ6tEkH WlD/j2Vv5MP9PxagVdMfjAC2wITHq8LJS+jpWjENYjJNn3YkEY3aoMYVsx4YiSK5Hyvyzdr/Yhx 91A7oRcmRHHq5fKJvDlDisJNI7MrTO7ottCgc8CuRWoIN0WxuENtzLxqsdIM/QkIFGVUc9Rixil z/ycGGTh6z+InWxikdwKY6eYO1gNZth3zOGqM4tt+GoVUvs4z1dNIk0DdAjzzYHKsbCSz6Gz8W5 Ah/fBCe6onNnZkz91o6/mOVId0tPhTwajE25nTSBSlF1HufvnZwLk2nkkOdHDVrxXm2fVYHQ+ja x5eYNRXDbqw5mwMLi9OfES+KWyi8diYdK5cU3pXyCtiBHEkCdyQb7+NnFU/OIZflyozoqghlecq RUsMWPMSsnC X-Received: by 2002:a05:6830:264a:b0:7d9:ad90:5670 with SMTP id 46e09a7af769-7dc9518c0f3mr25019360a34.18.1777146680311; Sat, 25 Apr 2026 12:51:20 -0700 (PDT) Received: from sean-HP-EliteBook-830-G6.attlocal.net ([2600:1702:5083:7610:2e29:c3c3:de27:ce76]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7dcd164d2c3sm13987624a34.24.2026.04.25.12.51.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 25 Apr 2026 12:51:19 -0700 (PDT) From: Sean Wang To: nbd@nbd.name, lorenzo.bianconi@redhat.com Cc: linux-wireless@vger.kernel.org, linux-mediatek@lists.infradead.org, Javier Tia , Sean Wang Subject: [PATCH v5 09/21] wifi: mt76: mt7925: disable ASPM and runtime PM for MT7927 Date: Sat, 25 Apr 2026 14:49:59 -0500 Message-ID: <20260425195011.790265-10-sean.wang@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260425195011.790265-1-sean.wang@kernel.org> References: <20260425195011.790265-1-sean.wang@kernel.org> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Javier Tia Disable PCIe ASPM unconditionally for MT7927. The CONNINFRA power domain and WFDMA register access are unreliable with PCIe L1 active, causing throughput to drop from 1+ Gbps to ~200 Mbps. Disable runtime PM and deep sleep for MT7927. The combo chip shares a CONNINFRA power domain between WiFi (PCIe) and BT (USB). SET_OWN/CLR_OWN transitions on the LPCTL register crash the BT firmware, requiring a full power cycle to recover. PM enablement will be addressed in a follow-up once safe power state transitions are determined. Reviewed-by: Sean Wang Signed-off-by: Javier Tia --- drivers/net/wireless/mediatek/mt76/mt7925/init.c | 3 ++- drivers/net/wireless/mediatek/mt76/mt7925/pci.c | 6 ++++-- 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/init.c b/drivers/net/wireless/mediatek/mt76/mt7925/init.c index c0c5cb9aff75..a8c2ca7c0efc 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/init.c @@ -232,7 +232,8 @@ int mt7925_register_device(struct mt792x_dev *dev) dev->pm.idle_timeout = MT792x_PM_TIMEOUT; dev->pm.stats.last_wake_event = jiffies; dev->pm.stats.last_doze_event = jiffies; - if (!mt76_is_usb(&dev->mt76)) { + /* MT7927: runtime PM crashes BT firmware on the shared CONNINFRA domain */ + if (!mt76_is_usb(&dev->mt76) && !is_mt7927(&dev->mt76)) { dev->pm.enable_user = true; dev->pm.enable = true; dev->pm.ds_enable_user = true; diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c index 604c0e9ae7ba..1f05c212be02 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/pci.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci.c @@ -350,7 +350,10 @@ static int mt7925_pci_probe(struct pci_dev *pdev, if (ret) goto err_free_pci_vec; - if (mt7925_disable_aspm) + is_mt7927_hw = (pdev->device == 0x6639 || pdev->device == 0x7927); + + /* MT7927: ASPM L1 causes unreliable WFDMA register access */ + if (mt7925_disable_aspm || is_mt7927_hw) mt76_pci_disable_aspm(pdev); ops = mt792x_get_mac80211_ops(&pdev->dev, &mt7925_ops, @@ -371,7 +374,6 @@ static int mt7925_pci_probe(struct pci_dev *pdev, dev = container_of(mdev, struct mt792x_dev, mt76); dev->fw_features = features; dev->hif_ops = &mt7925_pcie_ops; - is_mt7927_hw = (pdev->device == 0x6639 || pdev->device == 0x7927); dev->irq_map = is_mt7927_hw ? &mt7927_irq_map : &irq_map; mt76_mmio_init(&dev->mt76, pcim_iomap_table(pdev)[0]); tasklet_init(&mdev->irq_tasklet, mt792x_irq_tasklet, (unsigned long)dev); -- 2.43.0