From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 74F91CA5FF0 for ; Mon, 5 Oct 2026 08:32:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=GLsLsMT86GlPN0AYIvBXyoQrjC3HFuiIZCWJaJUisAg=; b=0GfqBFJUjteXdDfGELUrzeEdL9 Eyj9Oa1H/XXovzHolbnMcoCIlpHBzzc28vE+zKybusgTp21WiZhWyvNiTpvSwsotuvRuxavEv6QHh RObS1lXroLaVjcsyeNJw/5ac/T6dNkb0T5lRP3iqQYN1iohnDxfxkyR8u75Z5HSIf0G2mVUeNFUO/ IcXzselkBRxADqaI7Wwo+NY9G8H0cYMiDC1jEn35KWQ2yEuZDDfq6+gtF5qy87QF+4X3M+R7XufVw ZYQRHiWaOmaxXEqQ9fuujVrBYS+NGOmd/+AhI8EZlsqkaAPrMeuK4A3Fi3jzDwHNiUKsbBTKj5HEf 1qTama+Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xDe77-0000000FtbW-2coI; Mon, 05 Oct 2026 08:32:01 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xDe75-0000000FtZk-3grX for linux-mediatek@lists.infradead.org; Mon, 05 Oct 2026 08:32:01 +0000 X-UUID: 3977be68c09711f1afed4741b24580c9-20261005 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=GLsLsMT86GlPN0AYIvBXyoQrjC3HFuiIZCWJaJUisAg=; b=I+M0lL1BbtSzTiN+gDP4AOVpiAXfcpsa0LZ2I0o/xP2CypqVtrnLYS9TndhfhQ0NGPKdUqOFrptBN7bqZK3v+fmc+yIqny5AKbJlCb9Bc56ud1cSe1ZN9Ga1XZejixRPPtDBCn3bMO5yHAd/BkXP+9iASEpmGLMP94whopg9AeU=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.20,REQID:bdfe2350-a25f-49c5-8b44-0c3cb962e6a6,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:291e20b,CLOUDID:c435fb94-3103-4fdb-b79c-08de0e281a5d,B ulkID:nil,BulkQuantity:0,SF:102|836|865|888|898,TC:-5,Content:0|15|50|99,E DM:-3,IP:nil,URL:0,File:130,RT:0,Bulk:nil,QS:nil,BEC:-1,COL:0,OSI:0,OSA:0, AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: 3977be68c09711f1afed4741b24580c9-20261005 Received: from mtkmbs14n2.mediatek.inc [(172.21.101.76)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1430771167; Mon, 05 Oct 2026 01:31:56 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Mon, 5 Oct 2026 16:31:53 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Mon, 5 Oct 2026 16:31:53 +0800 From: Anthony Liu To: , CC: , , , , , , , , , , Anthony Liu Subject: [PATCH v4 4/5] [PATCH v4] [PATCH 04/05] wifi: mt76: add PCIe speed tuning for mt7922/mt7928 Date: Mon, 5 Oct 2026 16:31:53 +0800 Message-ID: <20261005083153.104700-1-anthony.liu@mediatek.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261005_013159_931031_C6A9AB82 X-CRM114-Status: GOOD ( 12.59 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Some hardware platforms use ACPI MTFG table denoting the existence of noise that impacts Wi-Fi performance. This patch reads the ACPI SAR info and notifies FW to detect current status and to adjust PCIe bus to mitigate the noise. Signed-off-by: Anthony Liu --- .../net/wireless/mediatek/mt76/mt7921/init.c | 5 ++++ .../wireless/mediatek/mt76/mt7921/pci_mac.c | 6 ++++ .../net/wireless/mediatek/mt76/mt7925/init.c | 2 ++ .../wireless/mediatek/mt76/mt7925/pci_mac.c | 6 ++++ drivers/net/wireless/mediatek/mt76/mt792x.h | 4 +++ .../net/wireless/mediatek/mt76/mt792x_core.c | 28 +++++++++++++++++++ 6 files changed, 51 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/init.c b/drivers/net/wireless/mediatek/mt76/mt7921/init.c index 49be2fa4e3fa..fbd77ec48a52 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c @@ -102,6 +102,11 @@ static int __mt7921_init_hardware(struct mt792x_dev *dev) goto out; ret = mt7921_mac_init(dev); + if (ret) + goto out; + + if (is_mt7922(&dev->mt76)) + ret = mt792x_mcu_set_dyn_pcie_gen(dev); out: return ret; } diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c index 98b3469ac597..2449ac8ed6a4 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c @@ -116,6 +116,12 @@ int mt7921e_mac_reset(struct mt792x_dev *dev) if (err) goto out; + if (is_mt7922(&dev->mt76)) { + err = mt792x_mcu_set_dyn_pcie_gen(dev); + if (err) + goto out; + } + err = __mt7921_start(&dev->phy); out: diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/init.c b/drivers/net/wireless/mediatek/mt76/mt7925/init.c index cd22fcc021b1..e499b64971b4 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/init.c @@ -126,6 +126,8 @@ static int __mt7925_init_hardware(struct mt792x_dev *dev) } } + if (is_mt7928(&dev->mt76)) + ret = mt792x_mcu_set_dyn_pcie_gen(dev); out: return ret; } diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c b/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c index 8477d21abc66..9e4e78910560 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/pci_mac.c @@ -149,6 +149,12 @@ int mt7925e_mac_reset(struct mt792x_dev *dev) goto out; } + if (is_mt7928(&dev->mt76)) { + err = mt792x_mcu_set_dyn_pcie_gen(dev); + if (err) + goto out; + } + err = __mt7925_start(&dev->phy); out: clear_bit(MT76_RESET, &dev->mphy.state); diff --git a/drivers/net/wireless/mediatek/mt76/mt792x.h b/drivers/net/wireless/mediatek/mt76/mt792x.h index e7f3d36d5338..c1fa3dbba5ca 100644 --- a/drivers/net/wireless/mediatek/mt76/mt792x.h +++ b/drivers/net/wireless/mediatek/mt76/mt792x.h @@ -532,6 +532,7 @@ void mt792x_mac_link_bss_remove(struct mt792x_dev *dev, struct mt792x_link_sta *mlink); void mt792x_config_mac_addr_list(struct mt792x_dev *dev); int mt792x_mcu_chip_config(struct mt792x_dev *dev, const char *cmd); +int mt792x_mcu_set_dyn_pcie_gen(struct mt792x_dev *dev); static inline char *mt792x_ram_name(struct mt792x_dev *dev) { @@ -630,6 +631,9 @@ int __mt792xe_mcu_drv_pmctrl(struct mt792x_dev *dev); int mt792xe_mcu_drv_pmctrl(struct mt792x_dev *dev); int mt792xe_mcu_fw_pmctrl(struct mt792x_dev *dev); +#define MT792X_ACPI_FLAG_VALID BIT(0) /* ACPI SAR is valid */ +#define MT792X_ACPI_FLAG_PCIe BIT(3) /* Valid only when valid is set */ + #ifdef CONFIG_ACPI int mt792x_init_acpi_sar(struct mt792x_dev *dev); int mt792x_init_acpi_sar_power(struct mt792x_phy *phy, bool set_default); diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_core.c b/drivers/net/wireless/mediatek/mt76/mt792x_core.c index d676517df902..e77224e2ca50 100644 --- a/drivers/net/wireless/mediatek/mt76/mt792x_core.c +++ b/drivers/net/wireless/mediatek/mt76/mt792x_core.c @@ -1180,6 +1180,34 @@ int mt792x_mcu_chip_config(struct mt792x_dev *dev, const char *cmd) } EXPORT_SYMBOL_GPL(mt792x_mcu_chip_config); +int mt792x_mcu_set_dyn_pcie_gen(struct mt792x_dev *dev) +{ + u8 acpi_conf = mt792x_acpi_get_flags(&dev->phy); + char cmd[64]; + int ret = 0; + + if (!(acpi_conf & MT792X_ACPI_FLAG_VALID) || + !(acpi_conf & MT792X_ACPI_FLAG_PCIe)) + return 0; + + strscpy(cmd, "PcieGenSwitch 1 1200 0 -60"); + ret = mt792x_mcu_chip_config(dev, cmd); + if (ret) + return ret; + + strscpy(cmd, "PcieGenSwitchAGGen2 0"); + ret = mt792x_mcu_chip_config(dev, cmd); + if (ret) + return ret; + + if (!dev->mphy.cap.has_6ghz) + return 0; + + strscpy(cmd, "PcieGenSwitch6G 1"); + return mt792x_mcu_chip_config(dev, cmd); +} +EXPORT_SYMBOL_GPL(mt792x_mcu_set_dyn_pcie_gen); + MODULE_DESCRIPTION("MediaTek MT792x core driver"); MODULE_LICENSE("Dual BSD/GPL"); MODULE_AUTHOR("Lorenzo Bianconi "); -- 2.45.2