From nobody Mon Feb 9 16:01:51 2026 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 8134127C17F for ; Mon, 18 Aug 2025 06:56:23 +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=1755500185; cv=none; b=Y/7rH5goKUknqGbgv33R1v8iVV+jemZ7N6vyJr4xw9U3JFlQ8yta6U0tbu3kyYWIy0bNu94kYLGyckb1unSbYepI293osXUVlHMkrLNOZ+L1uJLhMLq9A/lvSXBnIreOta9dimbm7At3k1+VNR8GeGVB9NxYRlAGbMuHIJ11YvE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755500185; c=relaxed/simple; bh=VRKkJyPIHYb7eI+77dobbkoEosf8XwqEXf3P34a8jG0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=YZpYEeucU/xkqIqpQckW5P2CXGSVrvNRfO52xzGMjMJcBTLWCCMquk0ZSY4VePvuscxVWlr/FrhKrYC9gus61PswK9DX6gm68Qr2aF+DYctlbTSgZDqNPBbod13lWhhLk9iGnrI4ywqSFFDJOTKrtvahCaKDCqpv5GQhxLV+hOM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=OeZLdcd6; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="OeZLdcd6" Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 57HJ040X002291 for ; Mon, 18 Aug 2025 06:56:23 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= KqJ0pd1cftmxuJoM3+8jxhExU4GWVeeNWMlPt/Wsh6g=; b=OeZLdcd6mipZH84b Bze95LSpZub22oaGvk8PCHYPM2ICddEdVH8a3tg8tbaUQYeoC42gLAS6Xo8z4yat EcILVpt5faJ8P3tIVMAn1tpqgtgtWs/kjYud5wkLFtw6JCQoiPmOX+21+8cETl/u GfNyOpuRCQcdUaGiA1kV1hqZ4lV6QIQonqpL8BaLqcJ9x8gAq1pIvlQeJKHuzxOT rAqxIsO7QeYTpxgzVWfj0P9j2AmK/xNQxGwG1MRrnXd4MA81mLhU1lYpDn536/y3 3LTig5RmE95x3ktaUjCNG5fnXKGwOd1iEyrLeZyWm/o7QxRcTxj7roI7nNITIVmI mW54vw== Received: from mail-pl1-f199.google.com (mail-pl1-f199.google.com [209.85.214.199]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 48jgxtbptb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 18 Aug 2025 06:56:22 +0000 (GMT) Received: by mail-pl1-f199.google.com with SMTP id d9443c01a7336-2445823bc21so98471205ad.3 for ; Sun, 17 Aug 2025 23:56:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755500182; x=1756104982; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=KqJ0pd1cftmxuJoM3+8jxhExU4GWVeeNWMlPt/Wsh6g=; b=tw5PoejOICNc8gbWta+nBcBPLjIVkamOZbF2+ZDv6FieD/tr/B0VJTXQTRKXdkjIjT NgCfbgY8gsVATaa6FOZpDUGVHAlZZe57/Qllq4wSs0FJPOMYkW55/XtEKRWbf6lv6xMv 6WghIV4su56ehvjJRDl+xnb7rEhiEOf9zTQI6yA9Thp13gdKsyEl4h0WTEVAzkoJKC8+ mplLBze+NoXxKNShFy1OHyiPAdAATTXOdT7hFnwmxh/G9l4kMdcu0leqtOO1fXcvUU5k o6k8v1O9N4SxWKrq87gIeNm7n9PgooKPdqX7XJnJf31UKzsOLewpNx8Q1FtzCxzObG9J MpXw== X-Forwarded-Encrypted: i=1; AJvYcCUIXbGaYc/Nb8xq8BFA/CndUjCBxRmSnH8baxeBbeunWhNIvoyJGcpX7u/tZVneLs/ucs4fYg8s4r53vUI=@vger.kernel.org X-Gm-Message-State: AOJu0Yx5UApaFSVbGwji1rffD7Gqf69wnJpudhfsMB2/aoXRHteJxPQc i8d7EO3HgX/p66MM4jzYe9Zvi8CEDwTBWaBkHsFdlJFwNK8RwLWUoU38DtADsxMWvn/mDi5mr1y PqlXhXxb/hUGHuLP2ICFfyXKPh3jdbktIv9p/gv1cxh3bBGYsrxf3fivkkCiWHMezKQg= X-Gm-Gg: ASbGncuTbJJcBb6w4fpZ01Giy5UxlK35M64crWW1wBl5YSvxNjhKbg/Ox4qWTJ+XJfB M8n5gfwDBMgMVMax36VR4wycxUU+2bCpAoz1Q7fxwey8Xw0NhagD73NuoX3XJpSkg+nwD+RWTLN fm4CbQHO5ptud2GOwgqCAvx2mhePMoyMppR+aZimjftOWoA8pP33ZpxJsco/L+zVREKuU3SqQ5Q E/BsSA7Z0VMvIx/C2KONCzsG9Md2HL6psDT/gB6P4lcOCDzHU4G773xHW1iVZd48C5X9FJJJjJA xRMcaPshyQ/0xbbjFKGk1X6cL/pl3Lek0SDpqiYZm8q4d+yANp9XXZYq5AsnV6w4Cm4G5SraIEU = X-Received: by 2002:a17:903:4b4e:b0:240:9006:1523 with SMTP id d9443c01a7336-2446d5ba0d4mr136433695ad.10.1755500181737; Sun, 17 Aug 2025 23:56:21 -0700 (PDT) X-Google-Smtp-Source: AGHT+IETroDxJYGIyIPvDwM5oImCqL+/zZSX4gJhnhKuXRgaJ/nVRPOgHpZ97wp6pTTUeuLGkE9a5Q== X-Received: by 2002:a17:903:4b4e:b0:240:9006:1523 with SMTP id d9443c01a7336-2446d5ba0d4mr136433505ad.10.1755500181304; Sun, 17 Aug 2025 23:56:21 -0700 (PDT) Received: from hu-krichai-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2446d50f664sm70240105ad.75.2025.08.17.23.56.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Aug 2025 23:56:21 -0700 (PDT) From: Krishna Chaitanya Chundru Date: Mon, 18 Aug 2025 12:25:49 +0530 Subject: [PATCH 4/5] bus: mhi: host: Update the Time sync logic to read 64 bit register value Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250818-tsc_time_sync-v1-4-2747710693ba@oss.qualcomm.com> References: <20250818-tsc_time_sync-v1-0-2747710693ba@oss.qualcomm.com> In-Reply-To: <20250818-tsc_time_sync-v1-0-2747710693ba@oss.qualcomm.com> To: Manivannan Sadhasivam , Richard Cochran Cc: mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, taniya.das@oss.qualcomm.com, imran.shaik@oss.qualcomm.com, quic_vbadigan@quicinc.com, quic_mrana@quicinc.com, Krishna Chaitanya Chundru X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1755500162; l=1864; i=krishna.chundru@oss.qualcomm.com; s=20230907; h=from:subject:message-id; bh=VRKkJyPIHYb7eI+77dobbkoEosf8XwqEXf3P34a8jG0=; b=ogLjc4Nt0lyt61XbdjF9grKAQZjNggEwG+U62zk8ksA8Di1pRTHGwXONGGpX+RfExLKWxiyJo UXgpiO0FlRrCxpdNriEnm0pEngHx+z5oU4KaDHbANZgcvu1xHNs/J56 X-Developer-Key: i=krishna.chundru@oss.qualcomm.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-Proofpoint-ORIG-GUID: NHVJ8xHDTMfF4RrZdxC6b4QD9Zz3pMfu X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODE2MDAyMCBTYWx0ZWRfX1va/JGssFcKp pYbaus/qgkWGqMtDDvkUK+VQccfEoA3CFQ3H5ppCftbto60yg+uJf7NNQMAkteZ/pPKXyy//HOL l/K7QyMHcQzDMgUWEca1LjuKwIJY3yU4z4cT6QC/NnPIAZXW0nPWCxBWAy/KOyMZM0YLzngFT0a lA0V/yoAuhbR8ptVbEqnu/E4JG32v00xGxNnzmUpAF2EQhzqMctSq+W6Sck+a2QJVTxc3uiOvaA aEwoc0q+VGH76EZU0W8ywM/OYqB12E+15cSAtYItoJXpawiP3vbxuDybQZUua/DUDP/SOjk9v1E 2QRhzH95IBekDQ6lwxDsFySpkWlWLhOMIdIvvWOaQiqPzYus815e/ZukPD7p5aOfkGY9hnBEGeR SYa90klf X-Proofpoint-GUID: NHVJ8xHDTMfF4RrZdxC6b4QD9Zz3pMfu X-Authority-Analysis: v=2.4 cv=V7B90fni c=1 sm=1 tr=0 ts=68a2ce96 cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=EUspDBNiAAAA:8 a=TFScpXbSeKEp2Eh2D0gA:9 a=QEXdDO2ut3YA:10 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-18_03,2025-08-14_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 malwarescore=0 adultscore=0 clxscore=1015 suspectscore=0 impostorscore=0 bulkscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508160020 Instead of reading low and high of the mhi registers twice use 64 bit register value to avoid any time penality. Signed-off-by: Krishna Chaitanya Chundru --- drivers/bus/mhi/host/main.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index b7ceeb7261b708d46572d1f68dc277b6e1186b6e..f628198218ef9dc760bbfc3ec49= 6603d1a45dfc1 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -1719,6 +1719,7 @@ static int mhi_get_remote_time(struct mhi_controller = *mhi_cntrl, struct mhi_time struct mhi_timesync_info *time) { struct device *dev =3D &mhi_cntrl->mhi_dev->dev; + u64 val =3D U64_MAX; int ret, i; =20 if (!mhi_tsync && !mhi_tsync->time_reg) { @@ -1756,15 +1757,25 @@ static int mhi_get_remote_time(struct mhi_controlle= r *mhi_cntrl, struct mhi_time * transition to L0. */ for (i =3D 0; i < MHI_NUM_BACK_TO_BACK_READS; i++) { - ret =3D mhi_read_reg(mhi_cntrl, mhi_tsync->time_reg, - TSC_TIMESYNC_TIME_LOW_OFFSET, &time->t_dev_lo); + if (mhi_cntrl->read_reg64) { + ret =3D mhi_read_reg64(mhi_cntrl, mhi_tsync->time_reg, + TSC_TIMESYNC_TIME_LOW_OFFSET, &val); + } else { + ret =3D mhi_read_reg(mhi_cntrl, mhi_tsync->time_reg, + TSC_TIMESYNC_TIME_LOW_OFFSET, &time->t_dev_lo); =20 - ret =3D mhi_read_reg(mhi_cntrl, mhi_tsync->time_reg, - TSC_TIMESYNC_TIME_HIGH_OFFSET, &time->t_dev_hi); + ret =3D mhi_read_reg(mhi_cntrl, mhi_tsync->time_reg, + TSC_TIMESYNC_TIME_HIGH_OFFSET, &time->t_dev_hi); + } } =20 time->t_host_post =3D ktime_get_real(); =20 + if (mhi_cntrl->read_reg64) { + time->t_dev_lo =3D (u32)val; + time->t_dev_hi =3D (u32)(val >> 32); + } + local_irq_enable(); preempt_enable(); =20 --=20 2.34.1