From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E7CEE2FF65F for ; Fri, 21 Aug 2026 01:32:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.61.82.184 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787275932; cv=none; b=dNKdQ/Wehrc9UbbtEpJNAdnGfUkVOHnP1WougaBOd7c0R4ynCGfP3/NRyN7lSvrsalkrW6CmwTeoKXRGPXevND68VL0wZ/vKNo8evb+VslJp/4ck0gFI4YsYfeQa8unNkd2P9oxt4zpG/mI3ftWwB5DN8twcGsrrGcqU/StigEQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787275932; c=relaxed/simple; bh=7Wtb8jQN7E1U+P5cTBPd5QaWbjVy+0PwPqjxW5G9yso=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gBAVwH4uOg79ZdtsxYzE5tWPHHS6hJvX0qCzEBfPBx8OiGv19u9aRjU3gu3PqXeVasC7ix0a4oa+h+OoMvgGxTwckkRF7dKgqslKUUhzLBlgbicrp+LjJXMp3eiGETu+hB57p+sBYeaHFdRmoT/TIoBFmWyank34afeyGRuD0Ss= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=F0v62nxK; arc=none smtp.client-ip=210.61.82.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="F0v62nxK" X-UUID: 1cb8fa729d0011f18dc8c9802ae25ab1-20260821 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:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=pVBRQMzXN74sh53XLSLUpUpakdwcCdeHBXUzT2A8r7U=; b=F0v62nxKvhza6RuhupaCQEhTF3Ovw0wkho0IguqhM5Gk17oNaDFHnBke2erScsIEGLVLrjTivcwslBB74RuyZCnZJwT+bfWXctfCtrRl/C79f1n1KNZtflC3pnj66zFNoDw0wnFLvh39GPQQN6A0eZsKD4EI9J93k3CxyJ/Ha74=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.19,REQID:94139afe-6b60-4adb-a35f-a48f85b54692,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:7db8b62,CLOUDID:7e75495e-4843-4d87-9105-fd688b4769cd,B ulkID:nil,BulkQuantity:0,SF:81|82|102|836|865|888|898,TC:-5,Content:0|15|5 0|99,EDM:-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: 1cb8fa729d0011f18dc8c9802ae25ab1-20260821 Received: from mtkmbs14n2.mediatek.inc [(172.21.101.76)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1806462605; Fri, 21 Aug 2026 09:32:03 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by MTKMBS09N1.mediatek.inc (172.21.101.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Fri, 21 Aug 2026 09:32:02 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Fri, 21 Aug 2026 09:32:02 +0800 From: Anthony Liu To: , CC: , , , , , , , , , , Anthony Liu Subject: [PATCH v3] [PATCH 04/05] wifi: mt76: add PCIe speed tuning for mt7922/mt7928 Date: Fri, 21 Aug 2026 09:31:58 +0800 Message-ID: <20260821013159.2263479-4-anthony.liu@mediatek.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20260821013159.2263479-1-anthony.liu@mediatek.com> References: <20260821013159.2263479-1-anthony.liu@mediatek.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-MTK: N 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 F/W 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