From patchwork Wed Nov 22 07:10:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Can Guo X-Patchwork-Id: 13464154 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="Fd1LRf9l" Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 58D8790; Tue, 21 Nov 2023 23:16:11 -0800 (PST) Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AM5k8nD026875; Wed, 22 Nov 2023 07:11:05 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=qcppdkim1; bh=zN12TslWlABlp9K+YRCFNUDSGb7EOJnrGrpMh/GCmsY=; b=Fd1LRf9lkkBjS/sazsPqq3FEigQ6QD2Rvzn/WMBrDXa8ZiTM9rKzCRtlpwiKKWfwDCvn Rzr7RS/rxqKDUjPjvwi4SdAv/G+msNQW7lTw26uMT6xaZETVZrLDgF1kaUBYvaeBafGO 3nHK/B3n6jAWfR+egOBFZK6GfVtsZGWbBMFvBaE0gXXYLK/xuC22jcJhT1OWOsDZGF3x lN05shZNCkqL0fal1xBAI/kjcUe8qhA9M413EDMjRO0Wuah33Xu5f2U86S27lAutYVgI DopEIOK9pJa9LYu46D9TPhXXpD7I4cP6cpopn7z2o9tW/vh4+4BB0bRWQ8EcgBlidXNy YQ== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3uhbsp86pt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 22 Nov 2023 07:11:05 +0000 Received: from pps.filterd (NASANPPMTA04.qualcomm.com [127.0.0.1]) by NASANPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 3AM72Y14020842; Wed, 22 Nov 2023 07:11:03 GMT Received: from pps.reinject (localhost [127.0.0.1]) by NASANPPMTA04.qualcomm.com (PPS) with ESMTP id 3uepbmyg7y-1; Wed, 22 Nov 2023 07:11:03 +0000 Received: from NASANPPMTA04.qualcomm.com (NASANPPMTA04.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3AM7B3fE002480; Wed, 22 Nov 2023 07:11:03 GMT Received: from stor-dylan.qualcomm.com (stor-dylan.qualcomm.com [192.168.140.207]) by NASANPPMTA04.qualcomm.com (PPS) with ESMTP id 3AM7B34G002475; Wed, 22 Nov 2023 07:11:03 +0000 Received: by stor-dylan.qualcomm.com (Postfix, from userid 359480) id B408720A68; Tue, 21 Nov 2023 23:11:02 -0800 (PST) From: Can Guo To: quic_cang@quicinc.com, bvanassche@acm.org, mani@kernel.org, stanley.chu@mediatek.com, adrian.hunter@intel.com, beanhuo@micron.com, avri.altman@wdc.com, junwoo80.lee@samsung.com, martin.petersen@oracle.com Cc: Andy Gross , Bjorn Andersson , Konrad Dybcio , "James E.J. Bottomley" , linux-arm-msm@vger.kernel.org (open list:ARM/QUALCOMM SUPPORT), linux-scsi@vger.kernel.org (open list:UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER...), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v3 04/11] scsi: ufs: ufs-qcom: Limit negotiated gear to selected PHY gear Date: Tue, 21 Nov 2023 23:10:35 -0800 Message-Id: <1700637042-11104-5-git-send-email-quic_cang@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1700637042-11104-1-git-send-email-quic_cang@quicinc.com> References: <1700637042-11104-1-git-send-email-quic_cang@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: PVg95SGpqZAOrBj-K17GVeoupE8iGtK- X-Proofpoint-GUID: PVg95SGpqZAOrBj-K17GVeoupE8iGtK- X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-22_04,2023-11-21_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 mlxscore=0 phishscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 suspectscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311220050 Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: In the dual init scenario, the initial PHY gear is set to HS-G2, and the first Power Mode Change (PMC) is meant to find the best matching PHY gear for the 2nd init. However, for the first PMC, if the negotiated gear (say HS-G4) is higher than the initial PHY gear, we cannot go ahead let PMC to the negotiated gear happen, because the programmed UFS PHY settings may not support the negotiated gear. Fix it by overwriting the negotiated gear with the PHY gear. Signed-off-by: Can Guo --- drivers/ufs/host/ufs-qcom.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index cc0eb37..d4edf58 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -920,8 +920,13 @@ static int ufs_qcom_pwr_change_notify(struct ufs_hba *hba, * because, the PHY gear settings are backwards compatible and we only need to * change the PHY gear settings while scaling to higher gears. */ - if (dev_req_params->gear_tx > host->phy_gear) + if (dev_req_params->gear_tx > host->phy_gear) { + u32 old_phy_gear = host->phy_gear; + host->phy_gear = dev_req_params->gear_tx; + dev_req_params->gear_tx = old_phy_gear; + dev_req_params->gear_rx = old_phy_gear; + } /* enable the device ref clock before changing to HS mode */ if (!ufshcd_is_hs_mode(&hba->pwr_info) &&