From patchwork Wed Dec 18 10:26:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashanth K X-Patchwork-Id: 852123 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 0E46219F128; Wed, 18 Dec 2024 10:28:01 +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=1734517683; cv=none; b=BIsAnwHYKiOP5NE3Uqx0E7xZ92WbosZsb35CfNkBJIN4Y2z13XfLsjWlkVaEltWe82FiEaUvNwC8qjCNDW9ezPw1VHv2+Y6TDmeSn9E88TCo42sPc29tysfoSpnlCsXCnm9aO0ouaFylw2lIs4V4YuzAdZhSmC4wr5zu2CvOTpA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734517683; c=relaxed/simple; bh=3LCiapXts4kyo0YLgwwXscp+Bj5y6qe59HmBZh+D/Qs=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=BG0/1NotzuHTwlrM6/ZkWb2W4jxtqRtVKdJkdE2QDnSoi80P53ZiJbbsMPy5QbqW5QEadKPQJuq/mY7g2MR96H0XHLe3wGue7lrPP/r7JJ9cB+IZasznS8fdrY3DDNFVmGf3S+KT4sCdgU3kzfg/J0eQPoiV5znilZc6CiX91xI= 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=VP5sXrbR; 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="VP5sXrbR" 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 4BI8617V011478; Wed, 18 Dec 2024 10:27:58 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= H8HNKNz/rSJhniyQrgcOSFY5YFgExI2W+YeNCd2c8EM=; b=VP5sXrbRvoo1zrsb rSygvpmISRxD6QmJQAAJCkGUSccrUkN/xFjLT0gMMzETKqFX/GOUaKOvEeOh2i37 u5gfHg6JTNDrslQhk+jrTwX+tpU0TtAc0CHuhAa18mJ6Dj0r4hBEjZvz4bnrTJZL nA1o07d3vf60xPZO0iNmjk/cnPpH8SBcIfiLuB3f4ryz0ss2uHDjNVb9iaqLUYJn HHJJFTtDvPuJUiFHhnP+iYJ3gBiLX8VinNKFfO1dP9XY54sLyr67IDRkLY68AsTv 1cPt6Z0CuLRckRRo8YzpgBBq3t6jB7S8p0wnAblwx42Uqfzc+x18NAL3dJ7lEitj AvJY5Q== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 43ktk2gc86-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Dec 2024 10:27:57 +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 4BIARvKc010843 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 18 Dec 2024 10:27:57 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 02:27:53 -0800 From: Prashanth K To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Krishna Kurapati CC: , , , , Prashanth K Subject: [PATCH v3 05/19] arm64: dts: qcom: Disable USB U1/U2 entry for SM8250 Date: Wed, 18 Dec 2024 15:56:53 +0530 Message-ID: <20241218102707.76272-6-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: Cc1O1NtkjUAOFxx56BnFmyJdnsFjFjvs X-Proofpoint-ORIG-GUID: Cc1O1NtkjUAOFxx56BnFmyJdnsFjFjvs 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=469 clxscore=1015 adultscore=0 mlxscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 impostorscore=0 spamscore=0 priorityscore=1501 bulkscore=0 malwarescore=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/sm8250.dtsi | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/sm8250.dtsi b/arch/arm64/boot/dts/qcom/sm8250.dtsi index 48318ed1ce98..e40f3b21e37a 100644 --- a/arch/arm64/boot/dts/qcom/sm8250.dtsi +++ b/arch/arm64/boot/dts/qcom/sm8250.dtsi @@ -4207,6 +4207,8 @@ 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"; @@ -4294,6 +4296,8 @@ usb_2_dwc3: usb@a800000 { iommus = <&apps_smmu 0x20 0>; snps,dis_u2_susphy_quirk; snps,dis_enblslpm_quirk; + snps,dis-u1-entry-quirk; + snps,dis-u2-entry-quirk; phys = <&usb_2_hsphy>, <&usb_2_qmpphy>; phy-names = "usb2-phy", "usb3-phy"; };