From patchwork Fri Sep 1 11:43:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nitin Rawat X-Patchwork-Id: 719563 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AA11CA0FE6 for ; Fri, 1 Sep 2023 11:44:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349252AbjIALou (ORCPT ); Fri, 1 Sep 2023 07:44:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244037AbjIALor (ORCPT ); Fri, 1 Sep 2023 07:44:47 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71F5510FB; Fri, 1 Sep 2023 04:44:07 -0700 (PDT) Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3815f8rC001631; Fri, 1 Sep 2023 11:43:47 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=O8sZ2FQUD6yKcJ5az9yIPexHXPlnR4H6esMtC6yX0y0=; b=iwzmp5mHlGUgsLJh/o3lKswnxfZvkJmkol5+yQ3lNd1eAXVmMtBfcnYQ2vhBeBKvfFZY PmzMP7DWDESTkiXgiUCUUu7pNZG+7dBfxyhunN0sr/1UHsdDVMoODYnjJ6ktdnQGQeHI SeY84hbZSUHExc6IT64vkmIaWHAcdXLbvN+97ytVFQK4pJsz9xQkWD2Ot8BqwI6bHXUG T4a9f2cs9LgAYMJej27/LtOWLVJAC+r4Mv6vxLXy+dMae5KwnjQ8+UMZrbD8lhyUVbvp vszVVUKyMAx93I18PzsuuIfwqUD8QYIsR0pD024KIJKtp8kDTb9qCuc1bzSF9KPiMJbH pQ== Received: from apblrppmta01.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3stpy9bq24-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 01 Sep 2023 11:43:46 +0000 Received: from pps.filterd (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 381BhhsG014748; Fri, 1 Sep 2023 11:43:43 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3sqafmj08r-1; Fri, 01 Sep 2023 11:43:43 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 381Bhgfs014721; Fri, 1 Sep 2023 11:43:43 GMT Received: from hu-maiyas-hyd.qualcomm.com (hu-nitirawa-hyd.qualcomm.com [10.213.109.152]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 381BhgJV014709; Fri, 01 Sep 2023 11:43:43 +0000 Received: by hu-maiyas-hyd.qualcomm.com (Postfix, from userid 2342877) id 9BF225006A8; Fri, 1 Sep 2023 17:13:42 +0530 (+0530) From: Nitin Rawat To: mani@kernel.org, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, jejb@linux.ibm.com, martin.petersen@oracle.com Cc: quic_cang@quicinc.com, quic_nguyenb@quicinc.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Nitin Rawat , Naveen Kumar Goud Arepalli Subject: [PATCH V6 6/6] scsi: ufs: qcom: Configure clk HW division based on scaling conditions. Date: Fri, 1 Sep 2023 17:13:36 +0530 Message-Id: <20230901114336.31339-7-quic_nitirawa@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230901114336.31339-1-quic_nitirawa@quicinc.com> References: <20230901114336.31339-1-quic_nitirawa@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: FbpUUws7zAMFUpQ94ft5ZXsWjonUWFyW X-Proofpoint-GUID: FbpUUws7zAMFUpQ94ft5ZXsWjonUWFyW X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-01_09,2023-08-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 impostorscore=0 suspectscore=0 adultscore=0 mlxlogscore=965 clxscore=1015 malwarescore=0 phishscore=0 bulkscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309010109 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org a) Enable internal HW division of unipro core_clk for scale up condition. b) Clear internal HW division of unipro core_clk for scale down condition. Co-developed-by: Naveen Kumar Goud Arepalli Signed-off-by: Naveen Kumar Goud Arepalli Signed-off-by: Nitin Rawat --- drivers/ufs/host/ufs-qcom.c | 31 +++++++++++++++++-------------- drivers/ufs/host/ufs-qcom.h | 2 +- 2 files changed, 18 insertions(+), 15 deletions(-) -- 2.17.1 diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index c251c98a74f0..2ddda9356abc 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -1389,18 +1389,21 @@ static int ufs_qcom_set_core_clk_ctrl(struct ufs_hba *hba, core_clk_ctrl_reg |= FIELD_PREP(CLK_1US_CYCLES_MASK, cycles_in_1us); } - /* Clear CORE_CLK_DIV_EN */ - core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT; + /* Enable CORE_CLK_DIV_EN for scale up condition */ + if (is_max_freq) + core_clk_ctrl_reg |= CORE_CLK_DIV_EN_BIT; ret = ufshcd_dme_set(hba, UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), core_clk_ctrl_reg); + if (ret) + return ret; /* * UFS host controller V4.0.0 onwards needs to program * PA_VS_CORE_CLK_40NS_CYCLES attribute per programmed * frequency of unipro core clk of UFS host controller. */ - if (!ret && (host->hw_ver.major >= 4)) { + if (host->hw_ver.major >= 4) { if (cycles_in_40ns > PA_VS_CORE_CLK_40NS_CYCLES_MASK) return -EINVAL; @@ -1451,26 +1454,26 @@ static int ufs_qcom_clk_scale_up_post_change(struct ufs_hba *hba) static int ufs_qcom_clk_scale_down_pre_change(struct ufs_hba *hba) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); - int err; - u32 core_clk_ctrl_reg; + int ret; + u32 reg; if (!ufs_qcom_cap_qunipro(host)) return 0; - err = ufshcd_dme_get(hba, + ret = ufshcd_dme_get(hba, UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), - &core_clk_ctrl_reg); + ®); + if (ret) + return ret; /* make sure CORE_CLK_DIV_EN is cleared */ - if (!err && - (core_clk_ctrl_reg & DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT)) { - core_clk_ctrl_reg &= ~DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT; - err = ufshcd_dme_set(hba, + if (reg & CORE_CLK_DIV_EN_BIT) { + reg &= ~CORE_CLK_DIV_EN_BIT; + ret = ufshcd_dme_set(hba, UIC_ARG_MIB(DME_VS_CORE_CLK_CTRL), - core_clk_ctrl_reg); + reg); } - - return err; + return ret; } static int ufs_qcom_clk_scale_down_post_change(struct ufs_hba *hba) diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index bc176ef58e3e..bf0c370c79c7 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -141,7 +141,7 @@ enum { /* bit and mask definitions for DME_VS_CORE_CLK_CTRL attribute */ #define CLK_1US_CYCLES_MASK_V4 GENMASK(27, 16) #define CLK_1US_CYCLES_MASK GENMASK(7, 0) -#define DME_VS_CORE_CLK_CTRL_CORE_CLK_DIV_EN_BIT BIT(8) +#define CORE_CLK_DIV_EN_BIT BIT(8) #define PA_VS_CORE_CLK_40NS_CYCLES 0x9007 #define PA_VS_CORE_CLK_40NS_CYCLES_MASK GENMASK(6, 0)