From patchwork Wed May 20 17:53:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Asutosh Das (asd)" X-Patchwork-Id: 11560951 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0C37560D for ; Wed, 20 May 2020 17:53:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F1155206B6 for ; Wed, 20 May 2020 17:53:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726932AbgETRxk (ORCPT ); Wed, 20 May 2020 13:53:40 -0400 Received: from alexa-out-sd-01.qualcomm.com ([199.106.114.38]:49198 "EHLO alexa-out-sd-01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726747AbgETRxj (ORCPT ); Wed, 20 May 2020 13:53:39 -0400 Received: from unknown (HELO ironmsg03-sd.qualcomm.com) ([10.53.140.143]) by alexa-out-sd-01.qualcomm.com with ESMTP; 20 May 2020 10:53:39 -0700 Received: from asutoshd-linux1.qualcomm.com ([10.46.160.39]) by ironmsg03-sd.qualcomm.com with ESMTP; 20 May 2020 10:53:38 -0700 Received: by asutoshd-linux1.qualcomm.com (Postfix, from userid 92687) id 779F120B90; Wed, 20 May 2020 10:53:38 -0700 (PDT) From: Asutosh Das To: cang@codeaurora.org, martin.petersen@oracle.com, PedroM.Sousa@synopsys.com, linux-scsi@vger.kernel.org Cc: Asutosh Das , linux-arm-msm@vger.kernel.org, Andy Gross , Bjorn Andersson , Alim Akhtar , Avri Altman , "James E.J. Bottomley" , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v4 2/2] scsi: ufs-qcom: enter and exit hibern8 during clock scaling Date: Wed, 20 May 2020 10:53:17 -0700 Message-Id: <9b67c25eb7c0bf80075b36660aebdb3788207353.1589997078.git.asutoshd@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <186237103353b5a79c3496e619fca894dbc78600.1589997078.git.asutoshd@codeaurora.org> References: <186237103353b5a79c3496e619fca894dbc78600.1589997078.git.asutoshd@codeaurora.org> In-Reply-To: <186237103353b5a79c3496e619fca894dbc78600.1589997078.git.asutoshd@codeaurora.org> References: <186237103353b5a79c3496e619fca894dbc78600.1589997078.git.asutoshd@codeaurora.org> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Qualcomm controller needs to be in hibern8 before scaling clocks. This change puts the controller in hibern8 state before scaling and brings it out after scaling of clocks. Signed-off-by: Asutosh Das --- drivers/scsi/ufs/ufs-qcom.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 00ce8d6..3a4ed64 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1418,18 +1418,27 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, int err = 0; if (status == PRE_CHANGE) { + err = ufshcd_uic_hibern8_enter(hba); + if (err) + return err; if (scale_up) err = ufs_qcom_clk_scale_up_pre_change(hba); else err = ufs_qcom_clk_scale_down_pre_change(hba); + if (err) + ufshcd_uic_hibern8_exit(hba); + } else { if (scale_up) err = ufs_qcom_clk_scale_up_post_change(hba); else err = ufs_qcom_clk_scale_down_post_change(hba); - if (err || !dev_req_params) + + if (err || !dev_req_params) { + ufshcd_uic_hibern8_exit(hba); goto out; + } ufs_qcom_cfg_timers(hba, dev_req_params->gear_rx, @@ -1437,6 +1446,7 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, dev_req_params->hs_rate, false); ufs_qcom_update_bus_bw_vote(host); + err = ufshcd_uic_hibern8_exit(hba); } out: