From patchwork Fri Dec 13 09:52:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashanth K X-Patchwork-Id: 13906793 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 22A4D1B85D2; Fri, 13 Dec 2024 09:54:04 +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=1734083647; cv=none; b=qJcCmbLpn3u1/AqitBRZ6FGt/0iPL0RpjSGFFyGXciO9QyEDZ+Xx4SH/25e9t/TTbLCsza3rilVqmaLV0++5HVjTJfFISAPZuihg8Tg6eaFhvUOh/VIrDISIDc8XKn6DkF6RV2zjytOMTnXr8IPvBfsWeZz2nh1WFT2KAeMr3Xg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734083647; c=relaxed/simple; bh=20WJ8l5tnAPXinRP6IfA0c7urRNx9gGH1D45kCDVXU4=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=gnUC33QUQVznfWk7caBY6nnSYwTaKCJn23gHCR/nzsOkJHUl7YcQ4hJFHIjvMs3yN+taZiFQiplSp1MUCjHn9ysOSfCPNZnj59rLXAezlgCdfTSNBLVt8tRhVXGUtLQ20d2M7+SjNIHe2IGovwsEgvRjQqnVdz0eaAjKL2G4iu4= 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=PkDimKXg; 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="PkDimKXg" Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4BCKVl91005941; Fri, 13 Dec 2024 09:54:00 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= YOevpz2MLuxkICRzP21x45Eg7tfW5k04JKTABMbmho8=; b=PkDimKXgXzrOEWuv NmhOijBzCA0ln1wurZA0Sp44OPYVANO2znPmqLiCfJad41oro+853vyarbN4WCt9 RnNd57+xQ0K4JOPaAP+FKZ1PEdfT8/3uJ+ZFRV7ulgLnONrnLq+dTfawJZjKMDWb FuUJYwl7TlAtU41QZADQ+cDxiH9FANv+HIo5oTuuH+xujH6SH0Hnqnb9eaBd4zmS gYWI3ssixHCujyRPj74ip1GT1R53L8buPZtVcvP2YKVjH06N6zVJPzGU5Q0eKlHZ TCJc8KkZVSO0rNGGUYPJMFAY/YsSq4j4Sv25hqp8FJfWoP5FEeHac1wERY0vWU95 RwwBqA== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43g6xusnwc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Dec 2024 09:54:00 +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 4BD9rwNA011668 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Dec 2024 09:53:58 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; Fri, 13 Dec 2024 01:53:55 -0800 From: Prashanth K To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krishna Kurapati CC: , , , , Prashanth K Subject: [PATCH v2 17/19] arm64: dts: qcom: Disable USB U1/U2 entry for QDU1000 Date: Fri, 13 Dec 2024 15:22:35 +0530 Message-ID: <20241213095237.1409174-18-quic_prashk@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241213095237.1409174-1-quic_prashk@quicinc.com> References: <20241213095237.1409174-1-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: ShL3wqDAwOedFN7ZOykWO0qVzJTDBzVD X-Proofpoint-GUID: ShL3wqDAwOedFN7ZOykWO0qVzJTDBzVD 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 impostorscore=0 clxscore=1015 malwarescore=0 adultscore=0 mlxlogscore=443 suspectscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 bulkscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412130066 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: Prashanth K --- arch/arm64/boot/dts/qcom/qdu1000.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/qdu1000.dtsi b/arch/arm64/boot/dts/qcom/qdu1000.dtsi index 47c0dd31aaf2..85e9ccfc9655 100644 --- a/arch/arm64/boot/dts/qcom/qdu1000.dtsi +++ b/arch/arm64/boot/dts/qcom/qdu1000.dtsi @@ -1009,6 +1009,8 @@ usb_1_dwc3: usb@a600000 { iommus = <&apps_smmu 0xc0 0x0>; snps,dis_u2_susphy_quirk; snps,dis_enblslpm_quirk; + snps,dis-u1-entry-quirk; + snps,dis-u2-entry-quirk; phys = <&usb_1_hsphy>, <&usb_1_qmpphy>; phy-names = "usb2-phy",