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[2620:137:e000::1:20]) by mx.google.com with ESMTP id y23-20020a170906071700b007800b181a0csi1963554ejb.300.2022.11.11.09.26.28; Fri, 11 Nov 2022 09:27:00 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b="s/iRlNiO"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234375AbiKKRSF (ORCPT + 99 others); Fri, 11 Nov 2022 12:18:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56192 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234306AbiKKRSD (ORCPT ); Fri, 11 Nov 2022 12:18:03 -0500 Received: from lelv0142.ext.ti.com (lelv0142.ext.ti.com [198.47.23.249]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5C6F53F077; Fri, 11 Nov 2022 09:18:01 -0800 (PST) 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-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749221502439352252?= X-GMAIL-MSGID: =?utf-8?q?1749221502439352252?= 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