From patchwork Wed Dec 18 10:27:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashanth K X-Patchwork-Id: 851781 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 0639E1B423D; Wed, 18 Dec 2024 10:28:31 +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=1734517713; cv=none; b=s9ZgyJm1phwyezMiRpuMx/MvHdD6zbTij7ueMfNN3YA5Ej9V62ixL6Uem6sW4ra4tRDmo7wkYsUbAo4Zx6YWkavi8dJlvanlK+p9EkNzqVaoWLZkO83Hz8pWJ0gw1gtRVmkFQE1Ez/a4Hw57WcBcpK6g5ctBHqefObTlhP5Y6rk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734517713; c=relaxed/simple; bh=FaZ1hzMHdog/Cu4XFuQZtxdwcnJmetXamNFTGvr4Jsk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=kNXHyhQa8LmD9k/pW+3ukhogtdrATSt2uRIYfPykm9g6V/SEynLea9NsVDk/7BJJ7r87wtzvz0p1HxPAP5d4pJ8L3M7KETXjN3ylVSaY+fj/TEH54Lz+5IIy2c1HtQRwm5ajn1n+2XV6dLVwADpGkjjYA7Udf6AXBWpCMsZRhys= 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=ouRN4NmF; 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="ouRN4NmF" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4BI4rnTC000777; Wed, 18 Dec 2024 10:28:28 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= QQr9fctH+5XBxgpgp99EKbAUFidxNgaGD8AtVTfp4I4=; b=ouRN4NmFGKfnZ97B EQV4NjW729Y4k0Gb3pDsb4v2b9dxcW1QsW7PTifr/jhBDYBEP49pzGELB0FjMt/U pF+9Vfk6itx9ivttyfD2sf4GvHhulGSwby+fQ3hjVPM7pzQfTb++PHl27RMLRgXB m/fOfCH0eroD3RHd94Ndjr3QjB22U7eFWR0V1fgW/0vrfDpSyw7SjzV3+g6SRSCz kdGrKR/EGmEUX6VTtDJwkragbK7UCdAkO7CgqUcoUaRF5w+AyGYRP1f4H5jxd2Kg jkA2r9eu6Ggc43AMm0pX8R6F0sj5/MXY/nTGE+3/HxKFWmTS1/sOPH07qKg0Fjrd Y3deZw== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43kqs3grys-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Dec 2024 10:28:28 +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 4BIASR1V011799 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Dec 2024 10:28:27 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 02:28:23 -0800 From: Prashanth K To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krishna Kurapati CC: , , , , Prashanth K Subject: [PATCH v3 13/19] ARM: dts: qcom: Disable USB U1/U2 entry for SDX55 Date: Wed, 18 Dec 2024 15:57:01 +0530 Message-ID: <20241218102707.76272-14-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-ORIG-GUID: pkctCVk-2_qEH-NougvS0EeBJY_eECuQ X-Proofpoint-GUID: pkctCVk-2_qEH-NougvS0EeBJY_eECuQ 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 suspectscore=0 mlxlogscore=466 bulkscore=0 mlxscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 impostorscore=0 malwarescore=0 priorityscore=1501 clxscore=1015 phishscore=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-sdx55.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/qcom/qcom-sdx55.dtsi b/arch/arm/boot/dts/qcom/qcom-sdx55.dtsi index d0f6120b665d..f431cdfbbc3d 100644 --- a/arch/arm/boot/dts/qcom/qcom-sdx55.dtsi +++ b/arch/arm/boot/dts/qcom/qcom-sdx55.dtsi @@ -613,6 +613,8 @@ 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"; };