diff options
Diffstat (limited to '0202-mt7921e_Perform_FLR_to_recovery_the_device.patch')
| -rw-r--r-- | 0202-mt7921e_Perform_FLR_to_recovery_the_device.patch | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/0202-mt7921e_Perform_FLR_to_recovery_the_device.patch b/0202-mt7921e_Perform_FLR_to_recovery_the_device.patch new file mode 100644 index 000000000000..5966c1143c02 --- /dev/null +++ b/0202-mt7921e_Perform_FLR_to_recovery_the_device.patch @@ -0,0 +1,112 @@ +From mboxrd@z Thu Jan 1 00:00:00 1970 +Return-Path: <linux-kernel-owner@vger.kernel.org> +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 C716EEB64DB + for <linux-kernel@archiver.kernel.org>; Wed, 14 Jun 2023 06:35:43 +0000 (UTC) +Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand + id S243138AbjFNGfm (ORCPT <rfc822;linux-kernel@archiver.kernel.org>); + Wed, 14 Jun 2023 02:35:42 -0400 +Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43986 "EHLO + lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org + with ESMTP id S243281AbjFNGfH (ORCPT + <rfc822;linux-kernel@vger.kernel.org>); + Wed, 14 Jun 2023 02:35:07 -0400 +Received: from smtp-relay-canonical-1.canonical.com (smtp-relay-canonical-1.canonical.com [185.125.188.121]) + by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A75971709; + Tue, 13 Jun 2023 23:33:48 -0700 (PDT) +Received: from localhost.localdomain (unknown [10.101.196.174]) + (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) + key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) + (No client certificate requested) + by smtp-relay-canonical-1.canonical.com (Postfix) with ESMTPSA id ECD893FE8F; + Wed, 14 Jun 2023 06:33:41 +0000 (UTC) +DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; + s=20210705; t=1686724426; + bh=+hqis1W8nQ4EkQUmco7jTscaaZbuSwY0XCyi+/U9QfM=; + h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; + b=wIVM1sNd+ojHp6usjuvn93Ejfp9bdZeFSaG46lVPT9zOIp8wytXooK36JiMTSSn0l + 2eDxchP16vkMHZh9WMeLMOU2uMYGl2IC72DT9wEtoCN8kE1SKDZyKISm6VclhVjH/K + pM7P3JTy9iTfu8Met2cxNQk3SUybNSvxw4H3B5ZkrdBYvUX6a3HdEqTVRdIWGKE4bN + cGy0m6IQJBwBfD+iG9SDVbKk8b6BQnCCFks9n+yETD6WkkbiY/dOe28fNPPKk/AY1w + t7LdI6MxufhU+CLvZ7/233P6hdL4RZwqhDqF6cvYqn1aXRlc7irfxVq2mCg44OOzkJ + Wu9959Z93e1Kg== +From: Kai-Heng Feng <kai.heng.feng@canonical.com> +To: nbd@nbd.name, lorenzo@kernel.org, ryder.lee@mediatek.com +Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>, + Shayne Chen <shayne.chen@mediatek.com>, + Sean Wang <sean.wang@mediatek.com>, + Kalle Valo <kvalo@kernel.org>, + Matthias Brugger <matthias.bgg@gmail.com>, + AngeloGioacchino Del Regno + <angelogioacchino.delregno@collabora.com>, + Deren Wu <deren.wu@mediatek.com>, + Leon Yen <Leon.Yen@mediatek.com>, + linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, + linux-arm-kernel@lists.infradead.org, + linux-mediatek@lists.infradead.org +Subject: [PATCH] wifi: mt76: mt7921e: Perform FLR to recovery the device +Date: Wed, 14 Jun 2023 14:32:50 +0800 +Message-Id: <20230614063252.1650824-1-kai.heng.feng@canonical.com> +X-Mailer: git-send-email 2.34.1 +MIME-Version: 1.0 +Content-Transfer-Encoding: 8bit +Precedence: bulk +List-ID: <linux-kernel.vger.kernel.org> +X-Mailing-List: linux-kernel@vger.kernel.org + +When "Pre-boot WiFi" is enabled in BIOS, the mt7921e device may not +work: +mt7921e 0000:02:00.0: ASIC revision: 79220010 +mt7921e 0000:02:00.0: Message 00000010 (seq 1) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 2) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 3) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 4) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 5) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 6) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 7) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 8) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 9) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: Message 00000010 (seq 10) timeout +mt7921e 0000:02:00.0: Failed to get patch semaphore +mt7921e 0000:02:00.0: hardware init failed + +After some trials and errors, it shows that PCI function level reset can +recover the device back to a functional state. + +So perform FLR at probe routine to workaround the issue. + +Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> +--- + drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c +index ddb1fa4ee01d..9671fbe35a8e 100644 +--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c ++++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c +@@ -262,6 +262,10 @@ static int mt7921_pci_probe(struct pci_dev *pdev, + int ret; + u16 cmd; + ++ ret = pci_reset_function_locked(pdev); ++ if (ret) ++ pci_info(pdev, "Unable to perform FLR\n"); ++ + ret = pcim_enable_device(pdev); + if (ret) + return ret; +-- +2.34.1 + + |