From patchwork Fri Jan 17 03:51:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanley Chu X-Patchwork-Id: 11338289 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 AF3AF921 for ; Fri, 17 Jan 2020 04:01:25 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8A29B20728 for ; Fri, 17 Jan 2020 04:01:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="YqU/AWxi"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="QfqQN30y" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8A29B20728 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/2r1hQhIBszLs3elsUuuSCQfsUITv+oNsvSuQ5D3ro8=; b=YqU/AWxiShOmvX bZJJeYJZTpsdcLJ2PMtwr2vmNx6V1EbLTwvJOOn7Jn7mOJIk3wjUOUiOqnRUzL2BNAhuKl/f65M/W 5L8NS0AEKfPiI5tWJK6nhqZ2ZF2CypFOhxjqxztJ/Mnqyi2xh7TkR23zybCMdd/5AsrS63XzJsEzA WeOI6dR7d1/KINZwhkoqOwBY3rKiTyJh7EfdAtHLDo4eCKWo+f+eaHwXO0NO66oW+yT5BJD5Hfghh CZ+t10zTzaYZFrAQkBXFQmqqA3Ddnz9YDMeUkmK1hhOiy0IvdAON34xJ0FAnODhdDN4ApjMNn3Zbq lo+OWF/fkzSUFJkmBqEw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1isIp1-0001FB-Fb; Fri, 17 Jan 2020 04:01:23 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1isIov-0001CT-FC; Fri, 17 Jan 2020 04:01:22 +0000 X-UUID: a3320fd2d029439e831887501f622dd4-20200116 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=p2qxacDfCCVqjUwwOgx8vmOgcBiOvdFZh2JOvNF4dco=; b=QfqQN30yiN5NPwUOijX/BKDmh5xRxb0wtMVKh/cRHgS+vpkRmU15dd2elGQzcgLw7yYw3qYrfhRIhiNzlV44WWwX/xHnk1YO4dAtUFTgtvlA3bU6r4C4mhmeYYdbsyJDAU5FWJytmbYRS/aGdeSkzZ0aJDg9Tvw+crpRjld/yOQ=; X-UUID: a3320fd2d029439e831887501f622dd4-20200116 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1570715849; Thu, 16 Jan 2020 20:01:13 -0800 Received: from MTKMBS02N1.mediatek.inc (172.21.101.77) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 16 Jan 2020 19:52:13 -0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs02n1.mediatek.inc (172.21.101.77) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 17 Jan 2020 11:50:03 +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; Fri, 17 Jan 2020 11:51:09 +0800 From: Stanley Chu To: , , , , Subject: [PATCH v1 3/3] scsi: ufs-mediatek: enable low-power mode for hibern8 state Date: Fri, 17 Jan 2020 11:51:08 +0800 Message-ID: <20200117035108.19699-4-stanley.chu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200117035108.19699-1-stanley.chu@mediatek.com> References: <20200117035108.19699-1-stanley.chu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200116_200117_520896_2FA0C67E X-CRM114-Status: UNSURE ( 9.19 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [216.200.240.184 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stanley Chu , bvanassche@acm.org, andy.teng@mediatek.com, chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com, linux-kernel@vger.kernel.org, cang@codeaurora.org, linux-mediatek@lists.infradead.org, peter.wang@mediatek.com, matthias.bgg@gmail.com, beanhuo@micron.com, linux-arm-kernel@lists.infradead.org, asutoshd@codeaurora.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org In MediaTek Chipsets, UniPro link and ufshci can enter proprietary low-power mode while link is in hibern8 state. Signed-off-by: Stanley Chu Reviewed-by: Alim Akhtar Reviewed-by: Asutosh Das --- drivers/scsi/ufs/ufs-mediatek.c | 53 +++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c index d5194d0c4ef5..f32f3f34f6d0 100644 --- a/drivers/scsi/ufs/ufs-mediatek.c +++ b/drivers/scsi/ufs/ufs-mediatek.c @@ -382,11 +382,60 @@ static void ufs_mtk_device_reset(struct ufs_hba *hba) dev_info(hba->dev, "device reset done\n"); } +static int ufs_mtk_link_set_hpm(struct ufs_hba *hba) +{ + int err; + + err = ufshcd_hba_enable(hba); + if (err) + return err; + + err = ufshcd_dme_set(hba, + UIC_ARG_MIB_SEL(VS_UNIPROPOWERDOWNCONTROL, 0), + 0); + if (err) + return err; + + err = ufshcd_uic_hibern8_exit(hba); + if (!err) + ufshcd_set_link_active(hba); + else + return err; + + err = ufshcd_make_hba_operational(hba); + if (err) + return err; + + return 0; +} + +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); + if (err) { + /* Resume UniPro state for following error recovery */ + ufshcd_dme_set(hba, + UIC_ARG_MIB_SEL(VS_UNIPROPOWERDOWNCONTROL, 0), + 0); + return err; + } + + return 0; +} + static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) { + int err; struct ufs_mtk_host *host = ufshcd_get_variant(hba); if (ufshcd_is_link_hibern8(hba)) { + err = ufs_mtk_link_set_lpm(hba); + if (err) + return -EAGAIN; phy_power_off(host->mphy); ufs_mtk_setup_ref_clk(hba, false); } @@ -397,10 +446,14 @@ static int ufs_mtk_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) static int ufs_mtk_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) { struct ufs_mtk_host *host = ufshcd_get_variant(hba); + int err; if (ufshcd_is_link_hibern8(hba)) { ufs_mtk_setup_ref_clk(hba, true); phy_power_on(host->mphy); + err = ufs_mtk_link_set_hpm(hba); + if (err) + return err; } return 0;