From patchwork Fri Dec 13 09:52:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashanth K X-Patchwork-Id: 850404 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 B87131B6D0C; Fri, 13 Dec 2024 09:53:04 +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=1734083586; cv=none; b=s0xjXZlU34s4chVmQmoOec3cw6RvWCOVuI/JQ3ymjCPL8vuYek6pAyFYYHDduSyMKGTsjwlfSBMZIqvLB5p/KCHpZQfxefZjcWUo457qsMWxJN218GqVdqWgE13l63Wby6JNPYSm1gDmauq+jtxEl1J+LnfzgX4yOneuI72teWg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734083586; c=relaxed/simple; bh=OPjv+GAHlhhUEmp79UOVUpaJtyjP838VK+m6w0I7rO4=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=GBAIuvgjdjcG5mtslJoIVOZ5tasevuxZyBkIFbjBixrjp/ugeKNGIRX4gxdvT5EBz/Pzmg/GGuvW+4GP5gOEXCeeHevLr4sQlyEi7QLOeRynKk+b6ZnZiKi2JoKTUS6ncmKjGagMiaBmrs+I/qxKsBykjsOPENgXTnNHe1fKkd8= 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=Son+Qy1P; 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="Son+Qy1P" 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 4BD7K6hb030098; Fri, 13 Dec 2024 09:53:01 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= 1pFNfCshnVE7UZpZURV9f7134zGsDDWDo9LDXRgzFPM=; b=Son+Qy1PznCIdaRH wYEQL81w2QelML9uyzUa5TN9tGEo97pLKOeXY+lk+0omnGLXNbNjpP4FP8hKwlUY XHzaL2KiQfustUbkUi/mlvj3EgZCiI+8QXBqN+VnRqVOssy1A5BplstOOYiBV9Hb 5OMKkjhagU3RHg6dUFKnWljJ4jtDsj1jVuxHJOBhBPWn/Kf+vAuMmyE3SraeZzMr 30l/tksa0zIwvKzEsEqbznhHBCWxrEcZgYuJScDsJQxsrVyEOVLV2WIrnEYr6T7n f0S9PEdLwmXB8Fu/NNMUe+p53LajzeCr9p/+wJLb4n3He9Hq3rCbiFplTHJr9puu 3OwgUQ== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43dxw4e8k1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Dec 2024 09:53:01 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA04.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 4BD9qxqJ021356 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Dec 2024 09:52:59 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 01:52:56 -0800 From: Prashanth K To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krishna Kurapati CC: , , , , Prashanth K Subject: [PATCH v2 02/19] arm64: dts: qcom: Disable USB U1/U2 entry for SM8450 Date: Fri, 13 Dec 2024 15:22:20 +0530 Message-ID: <20241213095237.1409174-3-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: 7wJyT14dzRbVfVhUqKXw9tZogrKJ5WoU X-Proofpoint-GUID: 7wJyT14dzRbVfVhUqKXw9tZogrKJ5WoU 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 impostorscore=0 bulkscore=0 suspectscore=0 priorityscore=1501 adultscore=0 mlxlogscore=437 clxscore=1015 spamscore=0 mlxscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412130067 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/sm8450.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi index 53147aa6f7e4..331f223f47c3 100644 --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi @@ -4672,6 +4672,8 @@ usb_1_dwc3: usb@a600000 { iommus = <&apps_smmu 0x0 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 QMP_USB43DP_USB3_PHY>; phy-names = "usb2-phy", "usb3-phy";