From patchwork Wed Dec 18 10:27:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashanth K X-Patchwork-Id: 852119 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 3B30819D07B; Wed, 18 Dec 2024 10:28:30 +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=1734517711; cv=none; b=uDGnoJn77KJJ689cOrOZc+bTvKssJTLUafH/Ogp+Aj8XEBD7yTz19wMQrbou/uJp1HUfs3vRHg1OQl01zaouIKj1mWrVQws76b+55Pkr0UH2hswosK6+gJITtLVrA2KrZcRoEnUWSiv4bM/a+TMP/291U0go6Bxg5iTFXt6VVRY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734517711; c=relaxed/simple; bh=1tqFMLhrQQRnuW3VeL2U8YRTbxV/GUs8CO3Mj1HqRMM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=jXX83TCn9b47Eu4G8paA2iFtRNriKXU2ij2hjbApyNlN3A8js0CX9QrMk+qC7juZ8vNTif5ArvBiHzHQb/xtioFfiQc199rcwSVSgqv5dHA2dmt/xn073EmtMcm6qsn1r3ZNVR39VThTep0XNi7a1uBLLkg9WFGnxBsfvc+5vak= 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=gTStIHqG; 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="gTStIHqG" 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 4BI7V4UB025303; Wed, 18 Dec 2024 10:28:25 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= 3kkwZ/e3zkel1itrBUUETpbSdD4MfPnHDNbfg9P0vE4=; b=gTStIHqG3NbWilAj yL24SZyhUbMpPTrIyoAH3sDTkoDqZCKexYoIE8e+6mM9rL5CO0DYaviGBkszdLAC j2aj1Ho90dpZTZmvuRwU07twnZcsYVfc9sPfFZawHU2NHCCcblgbQ6ZxTa0scCHO fyBovX3/+szo0C3EVEhlqvGkwi/swrk1S6nMMDmRVXq9gi1kF+kvHP/EVoYQC9ai b4NeSLYwhN5lS92k8ehCvULf7z8hf+WOqbYKNTT2FG0ZPY3PPOZ7gdYz5BbGjSzd rAWE5rACG1zBdPrHrVMM5pQZdrwfRDnhCSlGsFgcL0muipryd70TvFWPR62spdiW HxIMQg== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43kt2w8e45-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Dec 2024 10:28:24 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4BIASNLV011740 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Dec 2024 10:28:23 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; Wed, 18 Dec 2024 02:28:19 -0800 From: Prashanth K To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krishna Kurapati CC: , , , , Prashanth K Subject: [PATCH v3 12/19] ARM: dts: qcom: Disable USB U1/U2 entry for SDX65 Date: Wed, 18 Dec 2024 15:57:00 +0530 Message-ID: <20241218102707.76272-13-quic_prashk@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241218102707.76272-1-quic_prashk@quicinc.com> References: <20241218102707.76272-1-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: nasanex01a.na.qualcomm.com (10.52.223.231) 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-GUID: qE1Cuf-zztvD27OjcgwgGJppZJqJcb7E X-Proofpoint-ORIG-GUID: qE1Cuf-zztvD27OjcgwgGJppZJqJcb7E 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 phishscore=0 spamscore=0 mlxlogscore=507 priorityscore=1501 malwarescore=0 clxscore=1015 suspectscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 mlxscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412180084 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 older targets like SM8150/SM8250/SM8350, there have been throughput issues seen during tethering use cases. 3. On targets like SDX75, intermittent disconnects were observed with certain cables due to impedence variations. Disabling these intermittent power states enhances device stability without affecting power usage. Signed-off-by: Prashanth K --- arch/arm/boot/dts/qcom/qcom-sdx65.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/qcom/qcom-sdx65.dtsi b/arch/arm/boot/dts/qcom/qcom-sdx65.dtsi index 3bc67bb8c1eb..3941d1f1af72 100644 --- a/arch/arm/boot/dts/qcom/qcom-sdx65.dtsi +++ b/arch/arm/boot/dts/qcom/qcom-sdx65.dtsi @@ -526,6 +526,8 @@ usb_dwc3: usb@a600000 { iommus = <&apps_smmu 0x1a0 0x0>; snps,dis_u2_susphy_quirk; snps,dis_enblslpm_quirk; + snps,dis-u1-entry-quirk; + snps,dis-u2-entry-quirk; phys = <&usb_hsphy>, <&usb_qmpphy>; phy-names = "usb2-phy", "usb3-phy"; };