From patchwork Wed Jan 29 07:38:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11355607 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 636AD92A for ; Wed, 29 Jan 2020 07:39:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 42576207FD for ; Wed, 29 Jan 2020 07:39:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="OyQtnys1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726128AbgA2HjK (ORCPT ); Wed, 29 Jan 2020 02:39:10 -0500 Received: from mailgw01.mediatek.com ([210.61.82.183]:40771 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726043AbgA2HjK (ORCPT ); Wed, 29 Jan 2020 02:39:10 -0500 X-UUID: 926de0fe0e604bbbbac8d22a474ad6c1-20200129 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=nmiAzrKgD/bdvC/COaVLhsa4iiJmtILGj/E1/yJKpsg=; b=OyQtnys1ls0nL2l41osZ0vV6T01F1Sz8CrfcLpdd+RT7xXXIOnB1shygncGD1yRKi8UXIfx1zgtcRI3eFv15WaVZzBd1mmv9/bgPj3aNDK+T4RAk4f4kskCESc2kJOs8VQ7CJjtvt1tBXgDZi6jTsMqJJIMWzg6dmsAYYcAZsNk=; X-UUID: 926de0fe0e604bbbbac8d22a474ad6c1-20200129 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.10 Build 0809 with TLS) with ESMTP id 1114575024; Wed, 29 Jan 2020 15:39:05 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs05n1.mediatek.inc (172.21.101.15) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 29 Jan 2020 15:38:25 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Wed, 29 Jan 2020 15:39:12 +0800 From: Stanley Chu To: , , , , , CC: , , , , , , , , , , , Stanley Chu Subject: [PATCH v3 1/4] scsi: ufs-mediatek: ensure UniPro is not powered down before linkup Date: Wed, 29 Jan 2020 15:38:59 +0800 Message-ID: <20200129073902.5786-2-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200129073902.5786-1-stanley.chu@mediatek.com> References: <20200129073902.5786-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org MediaTek Chipsets can enter proprietary UniPro low-power mode during suspend while link is in hibern8 state. Make sure leaving low-power mode before every link startup to prevent lockup in any possible error recovery path. In the same time, re-factor related funcitons to improve code readability. Signed-off-by: Stanley Chu Reviewed-by: Alim Akhtar --- drivers/scsi/ufs/ufs-mediatek.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c index 53eae5fe2ade..7ac838cc15d1 100644 --- a/drivers/scsi/ufs/ufs-mediatek.c +++ b/drivers/scsi/ufs/ufs-mediatek.c @@ -30,6 +30,11 @@ #define ufs_mtk_device_reset_ctrl(high, res) \ ufs_mtk_smc(UFS_MTK_SIP_DEVICE_RESET, high, res) +#define ufs_mtk_unipro_powerdown(hba, powerdown) \ + ufshcd_dme_set(hba, \ + UIC_ARG_MIB_SEL(VS_UNIPROPOWERDOWNCONTROL, 0), \ + powerdown) + static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool enable) { u32 tmp; @@ -290,6 +295,8 @@ static int ufs_mtk_pre_link(struct ufs_hba *hba) int ret; u32 tmp; + ufs_mtk_unipro_powerdown(hba, 0); + /* disable deep stall */ ret = ufshcd_dme_get(hba, UIC_ARG_MIB(VS_SAVEPOWERCONTROL), &tmp); if (ret) @@ -390,9 +397,7 @@ static int ufs_mtk_link_set_hpm(struct ufs_hba *hba) if (err) return err; - err = ufshcd_dme_set(hba, - UIC_ARG_MIB_SEL(VS_UNIPROPOWERDOWNCONTROL, 0), - 0); + err = ufs_mtk_unipro_powerdown(hba, 0); if (err) return err; @@ -413,14 +418,10 @@ static int ufs_mtk_link_set_lpm(struct ufs_hba *hba) { int err; - err = ufshcd_dme_set(hba, - UIC_ARG_MIB_SEL(VS_UNIPROPOWERDOWNCONTROL, 0), - 1); + err = ufs_mtk_unipro_powerdown(hba, 1); if (err) { /* Resume UniPro state for following error recovery */ - ufshcd_dme_set(hba, - UIC_ARG_MIB_SEL(VS_UNIPROPOWERDOWNCONTROL, 0), - 0); + ufs_mtk_unipro_powerdown(hba, 0); return err; }