From patchwork Fri Nov 11 17:17:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Vlaev X-Patchwork-Id: 13040654 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 2126FC433FE for ; Fri, 11 Nov 2022 17:39:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=KQ6joe114EptI1SoMVCstR00SJoqEm58H/caiarFDJA=; b=qrptCnUvFDCIWm siJcK9SjP+XW/LZwcdRoaDBxaPn9TvamnUo+AVrDrQOU/CN9Y3/1OLi635WyR8xCN5c9931JBidq8 X4nrz989vKSjwL4qDXvcUWZV6n61xlC81xaHI43WEMcVgZ6I+TBL7waW8l3LvpoIKjDsJj9lBTutx o5U70jjqjtiT3xY0HbfgIVaODt+r3+UVBdfSc0IrGr2GR313M90NvSSv2DoO0myz8K7ME1mn+mJmH mdTbGLelwKFXUbz82azTpCZv3sT2n3s7RO5ujFJqyxiprCugwPYDD6P2rZ+D2bi7dhG7re5kUpVp7 ZtGt/WAiuDFumrFPCJ9g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1otXzC-00HLQm-S6; Fri, 11 Nov 2022 17:38:40 +0000 Received: from lelv0142.ext.ti.com ([198.47.23.249]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1otXfB-00HAf2-2C for linux-arm-kernel@lists.infradead.org; Fri, 11 Nov 2022 17:17:59 +0000 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id 2ABHHokh079454; Fri, 11 Nov 2022 11:17:50 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1668187070; bh=yyoNJRT9+sRkSyBtz2H+CMlPQ7h0N1T+j7lp3IM8q4k=; h=From:To:CC:Subject:Date; b=s/iRlNiOo2JkCS09lTOXx2SGfewFrAza+Xh4n8+KCfPCY64xixThG10A99XedQBUE L0Zyx0Sa/zDQlwV25NIPtW4+71sRDrzwzVwIzxk2qIhTU1bzv+Howu1o3zcGRQ3EcX WzyaD+OVqQeJsJd+gVlqJbqMjnlMtJt13n8t55Gs= Received: from DFLE103.ent.ti.com (dfle103.ent.ti.com [10.64.6.24]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 2ABHHoFO091819 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 11 Nov 2022 11:17:50 -0600 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6; Fri, 11 Nov 2022 11:17:49 -0600 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6 via Frontend Transport; Fri, 11 Nov 2022 11:17:49 -0600 Received: from jti.ent.ti.com (ileaxei01-snat2.itg.ti.com [10.180.69.6]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 2ABHHewX028454; Fri, 11 Nov 2022 11:17:42 -0600 From: Georgi Vlaev To: Nishanth Menon , Tero Kristo , Santosh Shilimkar , Rob Herring , Krzysztof Kozlowski CC: , , , Vibhore Vardhan , Vignesh Raghavendra , Roger Quadros Subject: [PATCH v3 0/5] firmware: ti_sci: Introduce system suspend support Date: Fri, 11 Nov 2022 19:17:34 +0200 Message-ID: <20221111171739.160693-1-g-vlaev@ti.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221111_091757_268154_1F94E5A4 X-CRM114-Status: GOOD ( 18.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series introduces necessary ti_sci driver functionality in preparation of supporting DeepSleep mode for suspend to mem on TI K3 AM62x. This version is a fixup and rebase of the patch series by Dave Gerlach [1]. It applies on top of v6.1-rc4. Deep Sleep mode is described in section "5.2.4.4 DeepSleep" of the AM62x Technical Reference Manual [2]. The kernel triggers entry to Deep Sleep mode through the mem suspend transition with the following: * Use a TF-A binary that supports PSCI_SYSTEM_SUSPEND call. This causes system to use PSCI system suspend as last step of mem sleep. * The firmware requires that the OS sends a TISCI_MSG_PREPARE_SLEEP message in order to provide details about suspend, so we must add the ability to send this message. We also add TISCI_MSG_LPM_WAKE_REASON and TISCI_MSG_SET_IO_ISOLATION messages as part of a new PM ops. These messages are part of the TISCI PM Low Power Mode API [3]. (Patch 2) * A memory address must be provided to the firmware using the above message, which is allocated and managed by dma_alloc_coherent() and friends. (Patch 3) * System must load firmware to a specific location before Deep Sleep is entered, and this is accomplished using a memory region in device tree to indicate where this firmware should be loaded, and also a "firmware-name" property to indicate the name of the firmware to load. The ti_sci driver checks in its pm handler to see if the firmware has been loaded and if not, loads it. (Patch 4) * Finally, the ti_sci driver must actually send TISCI_MSG_PREPARE_SLEEP message to firmware with the above information included, which it does during the driver suspend handler when PM_MEM_SUSPEND is the determined state being entered. (Patch 5) This is tested on am625-sk using a limited dts with all devices disabled apart from cpu0, main_uart0, i2c, rtc, mmc/sd, dmsc, and secure_proxy_main. Testing this sequence requires K3 sdhci suspend/resume support [4], enable the wkup_rtc in the am625-sk.dts, disable devices that don't support system suspend/resume like OSPI and CPSW3G. In can be tested on the following branch: https://github.com/gvlaev/linux/tree/upstream-v6.2/lpm-ti-sci-v2 Changelog: v3: - Fix the compile warnings on 32-bit platforms reported by the kernel test robot in patches (3,5). - Pick up Roger's "Tested-by" tags. v2: - Addressed comments received for v1 series [1]. - Updated v1 patch 5 to use pm notifier to avoid firmware loading issues. - Dropped the reserved region requirement and allocate DMA memory instead. The reserved region binding patch is also removed. - Introduce two more TISCI LPM messages that are supported in SysFW. - Fixes in error handling. [1] https://lore.kernel.org/lkml/20220421203659.27853-1-d-gerlach@ti.com [2] https://www.ti.com/lit/pdf/spruiv7 [3] https://software-dl.ti.com/tisci/esd/latest/2_tisci_msgs/pm/lpm.html [4] https://lore.kernel.org/lkml/20220408124338.27090-1-a-govindraju@ti.com Georgi Vlaev (5): dt-bindings: ti, sci: Add lpm region and firmware-name firmware: ti_sci: Introduce Power Management Ops firmware: ti_sci: Allocate memory for the LPM modes firmware: ti_sci: Use dt provided fw name and address to load at suspend time firmware: ti_sci: Introduce prepare system suspend call .../bindings/arm/keystone/ti,sci.yaml | 21 +- drivers/firmware/ti_sci.c | 356 ++++++++++++++++++ drivers/firmware/ti_sci.h | 64 +++- include/linux/soc/ti/ti_sci_protocol.h | 44 +++ 4 files changed, 480 insertions(+), 5 deletions(-) base-commit: f0c4d9fc9cc9462659728d168387191387e903cc