From patchwork Tue Dec 31 08:11:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashanth K X-Patchwork-Id: 13923674 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 3846718B484; Tue, 31 Dec 2024 08:12:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735632724; cv=none; b=S05/GpLBsgDDxB2QNBYJDI8ArYFF+4CGhBpUJIG5vO0VSnSi1c78sd3Z4C5rkwnJFUQlfNX8eCEH2P/WRyrQ2rvyE1V0eG2hnbBH54/ViOV8hIZxx5xUebtmz7Dpp8MJ2HfnC7G5YDYZ6jm2wG926AEDofb+e8BMsZ+WRYd7P7Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735632724; c=relaxed/simple; bh=lmamaOWuYiYUHdPmHJEJM0KwOyyIo/Pv+6dPhpzlAZY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=UBATfm/Y5I5mvFxEgrdwONANxfIK3QhVZLXApTeo7t05tJVIareV7ByoApENPlS9zRoy7f+VoYMJKjaxZF3vcojv49zDkNHzL5kI5AhtgiNrPcsi1ig/4osAM9oy4vxrZXH31P5FfHWhaJLueqv+bTFi4Ny9ejEsFr4dVvi1e0A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=SCT4Bk9I; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="SCT4Bk9I" Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4BV4qqvx019926; Tue, 31 Dec 2024 08:12:00 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= 3QoHNC0W9+4QaZStqJAjURUDi9c4pL011kv3sN36X2k=; b=SCT4Bk9ItT9Bza4M jBRR4JfKP26vcrzRv20fGradjJiRKWOpmqnZE0Rr1Vzra6/QBmqf/ML5hTNT0W2R jykEUOQjgL0AO7/Wxlpxa4u7vRQ8WyoYPlLDTCnlTYFjHfupY4kNG2XyFVHXobMj kPIutV0JEYoLuuBzMemzmmEcuCu8Ii8R1Iw9B+AIeAuEQOIJghluWxM0HSKGOBMq ypyAq4eoPdZYku9aw2DbK96OzlScryKJEq2/d+RPYwhp8hKNXv7uOODWK/F929UJ 4/URL5il4kqh1phFuDZ4QF6kAYlKoe+RJTOdlrQQDWET5HXohwGJ7mWzHZjb6/Ha 1oIh3Q== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43v9yk8d5q-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 31 Dec 2024 08:11:59 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA02.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4BV8Bw6q012437 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 31 Dec 2024 08:11:58 GMT Received: from hu-prashk-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Tue, 31 Dec 2024 00:11:54 -0800 From: Prashanth K To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krishna Kurapati CC: , , , , Prashanth K , Konrad Dybcio Subject: [PATCH v4 07/17] arm64: dts: qcom: sc7280: Disable USB U1/U2 entry Date: Tue, 31 Dec 2024 13:41:05 +0530 Message-ID: <20241231081115.3149850-8-quic_prashk@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241231081115.3149850-1-quic_prashk@quicinc.com> References: <20241231081115.3149850-1-quic_prashk@quicinc.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: TU1L1WeP2BSyFYv6VzNr8Pqu0lCfxu9c X-Proofpoint-GUID: TU1L1WeP2BSyFYv6VzNr8Pqu0lCfxu9c X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 phishscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 clxscore=1015 malwarescore=0 adultscore=0 mlxscore=0 mlxlogscore=470 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412310067 From: Krishna Kurapati Disable U1 and U2 power-saving states to improve stability of USB. These low-power link states, designed to reduce power consumption during idle periods, can cause issues in latency-sensitive or high throughput use cases. Over the years, some of the issues seen are as follows: 1. In device mode of operation, when UVC is active, enabling U1/U2 is sometimes causing packets drops due to delay in entry/exit of intermittent these low power states. These packet drops are often reflected as missed isochronous transfers, as the controller wasn't able to send packet in that microframe interval and hence glitches are seen on the final transmitted video output. 2. On QCS6490-Rb3Gen2 Vision kit, ADB connection is heavily unstable when U1/U2 is enabled. Often when link enters U2, there is a re- enumeration seen and device is unusable for many use cases. 3. On QCS8300/QCS9100, it is observed that when Link enters U2, when the cable is disconnected and reconnected to host PC in HS, there is no link status change interrupt seen and the plug-in in HS doesn't show up a bus reset and enumeration failure happens. Disabling these intermittent power states enhances device stability without affecting power usage. Signed-off-by: Krishna Kurapati Signed-off-by: Prashanth K Reviewed-by: Konrad Dybcio --- arch/arm64/boot/dts/qcom/sc7280.dtsi | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi index 55db1c83ef55..e0fda894724b 100644 --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi @@ -3715,6 +3715,8 @@ usb_2_dwc3: usb@8c00000 { iommus = <&apps_smmu 0xa0 0x0>; snps,dis_u2_susphy_quirk; snps,dis_enblslpm_quirk; + snps,dis-u1-entry-quirk; + snps,dis-u2-entry-quirk; phys = <&usb_2_hsphy>; phy-names = "usb2-phy"; maximum-speed = "high-speed"; @@ -4244,6 +4246,8 @@ usb_1_dwc3: usb@a600000 { snps,dis_u2_susphy_quirk; snps,dis_enblslpm_quirk; snps,parkmode-disable-ss-quirk; + snps,dis-u1-entry-quirk; + snps,dis-u2-entry-quirk; phys = <&usb_1_hsphy>, <&usb_1_qmpphy QMP_USB43DP_USB3_PHY>; phy-names = "usb2-phy", "usb3-phy"; maximum-speed = "super-speed";