From patchwork Fri Jul 6 12:30:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Asutosh Das (asd)" X-Patchwork-Id: 10511589 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6AC7E603D7 for ; Fri, 6 Jul 2018 12:41:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5BF3028632 for ; Fri, 6 Jul 2018 12:41:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4FB4E285FF; Fri, 6 Jul 2018 12:41:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E9EF1285FC for ; Fri, 6 Jul 2018 12:40:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933314AbeGFMku (ORCPT ); Fri, 6 Jul 2018 08:40:50 -0400 Received: from alexa-out-blr-02.qualcomm.com ([103.229.18.198]:32534 "EHLO alexa-out-blr.qualcomm.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933060AbeGFMil (ORCPT ); Fri, 6 Jul 2018 08:38:41 -0400 X-IronPort-AV: E=Sophos;i="5.51,316,1526322600"; d="scan'208";a="98704" Received: from ironmsg03-blr.qualcomm.com ([10.86.208.132]) by alexa-out-blr.qualcomm.com with ESMTP/TLS/AES256-SHA; 06 Jul 2018 18:00:54 +0530 X-IronPort-AV: E=McAfee;i="5900,7806,8945"; a="470260" Received: from asutoshd-linux.qualcomm.com ([10.206.24.163]) by ironmsg03-blr.qualcomm.com with ESMTP; 06 Jul 2018 18:00:54 +0530 Received: by asutoshd-linux.qualcomm.com (Postfix, from userid 92687) id 75EDB2FAD; Fri, 6 Jul 2018 18:00:53 +0530 (IST) From: Asutosh Das To: subhashj@codeaurora.org, cang@codeaurora.org, vivek.gautam@codeaurora.org, rnayak@codeaurora.org, vinholikatti@gmail.com, jejb@linux.vnet.ibm.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org, Venkat Gopalakrishnan , Asutosh Das , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v1 7/9] scsi: ufs: add UFS power collapse support during hibern8 Date: Fri, 6 Jul 2018 18:00:34 +0530 Message-Id: <13f4fbc290b5e3cfea95f49d65ddb2bf99a15cdb.1530880007.git.asutoshd@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Subhash Jadavani UFS host controller hardware may allow the host controller to be power collapsed when UFS link is hibern8 state, this change allows the UFS host controller to be power collapsed during hibern8. Signed-off-by: Subhash Jadavani Signed-off-by: Venkat Gopalakrishnan Signed-off-by: Can Guo Signed-off-by: Asutosh Das --- drivers/scsi/ufs/ufshcd.c | 8 ++++++-- drivers/scsi/ufs/ufshcd.h | 13 ++++++++++++- 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 40d9c35..50588cf 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -7673,13 +7673,17 @@ static int ufshcd_vreg_set_hpm(struct ufs_hba *hba) static void ufshcd_hba_vreg_set_lpm(struct ufs_hba *hba) { - if (ufshcd_is_link_off(hba)) + if (ufshcd_is_link_off(hba) || + (ufshcd_is_link_hibern8(hba) + && ufshcd_is_power_collapse_during_hibern8_allowed(hba))) ufshcd_setup_hba_vreg(hba, false); } static void ufshcd_hba_vreg_set_hpm(struct ufs_hba *hba) { - if (ufshcd_is_link_off(hba)) + if (ufshcd_is_link_off(hba) || + (ufshcd_is_link_hibern8(hba) + && ufshcd_is_power_collapse_during_hibern8_allowed(hba))) ufshcd_setup_hba_vreg(hba, true); } diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index f79a639..8c5f987 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -728,7 +728,12 @@ struct ufs_hba { * to do background operation when it's active but it might degrade * the performance of ongoing read/write operations. */ -#define UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND (1 << 5) +#define UFSHCD_CAP_KEEP_AUTO_BKOPS_ENABLED_EXCEPT_SUSPEND (1 << 6) + /* + * If host controller hardware can be power collapsed when UFS link is + * in hibern8 then enable this cap. + */ +#define UFSHCD_CAP_POWER_COLLAPSE_DURING_HIBERN8 (1 << 7) struct devfreq *devfreq; struct ufs_clk_scaling clk_scaling; @@ -764,6 +769,12 @@ static inline bool ufshcd_is_hibern8_on_idle_allowed(struct ufs_hba *hba) return hba->caps & UFSHCD_CAP_HIBERN8_ENTER_ON_IDLE; } +static inline bool ufshcd_is_power_collapse_during_hibern8_allowed( + struct ufs_hba *hba) +{ + return !!(hba->caps & UFSHCD_CAP_POWER_COLLAPSE_DURING_HIBERN8); +} + static inline bool ufshcd_is_intr_aggr_allowed(struct ufs_hba *hba) { /* DWC UFS Core has the Interrupt aggregation feature but is not detectable*/