From patchwork Wed Dec 18 10:26:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashanth K X-Patchwork-Id: 851785 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 3ADBF19DF62; Wed, 18 Dec 2024 10:27:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734517678; cv=none; b=bq80CTITAsuAmAtkd5Kk7tAHw9g9rcHzX7tMHbn1jwaK4tWrJU+AYt7s1vOIkh4asa9pJoEBuEtN5fwAyG++CdZlrJonsZHL3v7tjwXFMJLxr0nAF13/F41kUDmUJnwK9oiCuM+I1KX4Kf7ylkafAw6mBLxcw9e8/sg4pTx0OgA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734517678; c=relaxed/simple; bh=U6CQUSyogKoUDhkWEP3+3ErBqWVBRxEc5mlu801S62w=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=u0HgAjjYDMW7as/7lGuGE9mvA1/gNbHb3fGj0ozhWzagez9Pjgo55pdIaMSPkW67zIHEg5mSFOWGEeYml4s2rV0khvXCuVk7roSQhh3MDj2yPr7da604v+KCn8H/I3uRzI4a8FsQnVfOKmJSIj4dY+xPBVblpksfSdbvc950D7E= 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=n9BKgOfz; arc=none smtp.client-ip=205.220.168.131 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="n9BKgOfz" Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4BI6Vfp5024955; Wed, 18 Dec 2024 10:27:54 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= IkLVGNOBiQZeKLXP7UfVNDFl2RU1pgxdMn0hN6sbQ7A=; b=n9BKgOfzRoisjm36 tfKwCzoid8Z0zcR9CASLPD0yHJ+a+gHPM7O+8vjE0bT7Ku5e9fPVQ+R8cNsO6NkH Sbuuw3Ac+LXZipYYVYYJ/P/zzteD79Y4+dyvKG3BzWGK/zmRgn3ap1Ms0tXziN80 T8zFqsUf6aJPD7eJUPH+KI+neaGSeYhbx2Brg/ekJ68XWmHoAPMo4ilFc73n4nr+ VmziX8c2Sd4M0nMgvRjVngVIyClqcxtkfq2h3BoALR8dsQGH2zImv2YBfLz1Bdb1 75KtkgghK7r4BW4u4CkV3CFkEJulIog3g0Ul2hHy9RHvn9QF9zv0YzlNrKosXRr9 yYyxRQ== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43ks6ygjde-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Dec 2024 10:27:54 +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 4BIARr17019323 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Dec 2024 10:27:53 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 02:27:49 -0800 From: Prashanth K To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krishna Kurapati CC: , , , , Prashanth K Subject: [PATCH v3 04/19] arm64: dts: qcom: Disable USB U1/U2 entry for SM6125 Date: Wed, 18 Dec 2024 15:56:52 +0530 Message-ID: <20241218102707.76272-5-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: PR28a6QWrnS28lY1LNurNH6bMZgSCp0E X-Proofpoint-GUID: PR28a6QWrnS28lY1LNurNH6bMZgSCp0E 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 mlxlogscore=284 mlxscore=0 priorityscore=1501 spamscore=0 adultscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 suspectscore=0 impostorscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412180084 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 older targets like SM8150/SM8250/SM8350, there have been throughput issues seen during tethering use cases. Disabling these intermittent power states enhances device stability without affecting power usage. Signed-off-by: Krishna Kurapati Signed-off-by: Prashanth K --- arch/arm64/boot/dts/qcom/sm6125.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sm6125.dtsi b/arch/arm64/boot/dts/qcom/sm6125.dtsi index 17d528d63934..2da6466b2029 100644 --- a/arch/arm64/boot/dts/qcom/sm6125.dtsi +++ b/arch/arm64/boot/dts/qcom/sm6125.dtsi @@ -1209,6 +1209,8 @@ usb3_dwc3: usb@4e00000 { phy-names = "usb2-phy"; snps,dis_u2_susphy_quirk; snps,dis_enblslpm_quirk; + snps,dis-u1-entry-quirk; + snps,dis-u2-entry-quirk; maximum-speed = "high-speed"; dr_mode = "peripheral"; };