From patchwork Wed Jan 8 05:23:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Boichat X-Patchwork-Id: 11322813 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 692D21398 for ; Wed, 8 Jan 2020 05:24:13 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 47CB92075D for ; Wed, 8 Jan 2020 05:24:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="FDcmjcfu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 47CB92075D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 42AFF6E176; Wed, 8 Jan 2020 05:24:12 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pl1-x642.google.com (mail-pl1-x642.google.com [IPv6:2607:f8b0:4864:20::642]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5A9826E176 for ; Wed, 8 Jan 2020 05:24:10 +0000 (UTC) Received: by mail-pl1-x642.google.com with SMTP id ay11so613045plb.0 for ; Tue, 07 Jan 2020 21:24:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Ra+20wVCtfatvw0K5yioGbAxlT9AXOAj2fQq6fBwVqo=; b=FDcmjcfuosKrI1aVlpORYzf8ILvaDJIrH3VeYHavKxE5uksMP8wy+dqr+rtKJisPrE xlYwd3lJXAmmyLWii0G328QSVx2jDBV4cxAewFF92xHO+tmLrnXLqN8Ecyy75QFduPs7 CEirAlKXuTSmlbnNiX0sxmPpxKElpSFVyZKcs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Ra+20wVCtfatvw0K5yioGbAxlT9AXOAj2fQq6fBwVqo=; b=aWAyBk4aZEhiR7ErRIO9Aa25KBwSpRDZ3E2dcuMY1pIndjpqWNqfSJB+MrvzTxCB4L 6F472eV1FEr3mBAuiyaS2d7dzIczi0o/qb1lH8uY+oV3e5FQ7V46KFV3rWHbeKAIrIS+ o+9qgaBLxU+6Mnw3GVm+AycNUE+LgbTQWD5X99TpWUJ+8MIFCAOAQBst1Bqu0TnADxMM wO3qgMQVcUW0IA407ecacy04rdMsnuPqQgBL/46MGT/Iu+5WKlG+VN9qwrgayyPJ5PRt dZBfdXdPbEJu6qN2U4+/bLCtU8zesMvupzcBUxdpZOlI4VJJEsHSbG6RuoeKDqB7TU1s 9j7Q== X-Gm-Message-State: APjAAAXS8c3EMSjwH+E0hUHdhQTJe2Qd/8dzDpVZKtYWfJBnse/dByEW mY7FYevsgshEJrBQABoJqCSVsw== X-Google-Smtp-Source: APXvYqxY4WiSpt87/FZwdfEEf+Pbv809uvPrWp4yZnui6jFSnmuTtOBb/0vcAlWflwuVhfVm7OsonA== X-Received: by 2002:a17:90a:e389:: with SMTP id b9mr2426783pjz.7.1578461049926; Tue, 07 Jan 2020 21:24:09 -0800 (PST) Received: from drinkcat2.tpe.corp.google.com ([2401:fa00:1:b:d8b7:33af:adcb:b648]) by smtp.gmail.com with ESMTPSA id n24sm387505pff.12.2020.01.07.21.24.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jan 2020 21:24:09 -0800 (PST) From: Nicolas Boichat To: Rob Herring Subject: [PATCH v2 5/7] drm/panfrost: Add support for multiple power domain support Date: Wed, 8 Jan 2020 13:23:35 +0800 Message-Id: <20200108052337.65916-6-drinkcat@chromium.org> X-Mailer: git-send-email 2.24.1.735.g03f4e72817-goog In-Reply-To: <20200108052337.65916-1-drinkcat@chromium.org> References: <20200108052337.65916-1-drinkcat@chromium.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Tomeu Vizoso , David Airlie , linux-kernel@vger.kernel.org, Liam Girdwood , dri-devel@lists.freedesktop.org, Steven Price , Mark Brown , linux-mediatek@lists.infradead.org, Alyssa Rosenzweig , hsinyi@chromium.org, Matthias Brugger , linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" When there is a single power domain per device, the core will ensure the power domains are all switched on. However, when there are multiple ones, as in MT8183 Bifrost GPU, we need to handle them in driver code. Signed-off-by: Nicolas Boichat --- The downstream driver we use on chromeos-4.19 currently uses 2 additional devices in device tree to accomodate for this [1], but I believe this solution is cleaner. [1] https://chromium.googlesource.com/chromiumos/third_party/kernel/+/refs/heads/chromeos-4.19/drivers/gpu/arm/midgard/platform/mediatek/mali_kbase_runtime_pm.c#31 drivers/gpu/drm/panfrost/panfrost_device.c | 87 ++++++++++++++++++++-- drivers/gpu/drm/panfrost/panfrost_device.h | 4 + 2 files changed, 83 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c index a0b0a6fef8b4e63..c6e9e059de94a4d 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -5,6 +5,7 @@ #include #include #include +#include #include #include "panfrost_device.h" @@ -131,6 +132,67 @@ static void panfrost_regulator_fini(struct panfrost_device *pfdev) regulator_disable(pfdev->regulator_sram); } +static void panfrost_pm_domain_fini(struct panfrost_device *pfdev) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(pfdev->pm_domain_devs); i++) { + if (!pfdev->pm_domain_devs[i]) + break; + + if (pfdev->pm_domain_links[i]) + device_link_del(pfdev->pm_domain_links[i]); + + dev_pm_domain_detach(pfdev->pm_domain_devs[i], true); + } +} + +static int panfrost_pm_domain_init(struct panfrost_device *pfdev) +{ + int err; + int i, num_domains; + + num_domains = of_count_phandle_with_args(pfdev->dev->of_node, + "power-domains", + "#power-domain-cells"); + /* Single domains are handled by the core. */ + if (num_domains < 2) + return 0; + + if (num_domains > ARRAY_SIZE(pfdev->pm_domain_devs)) { + dev_err(pfdev->dev, "Too many pm-domains: %d\n", num_domains); + return -EINVAL; + } + + for (i = 0; i < num_domains; i++) { + pfdev->pm_domain_devs[i] = + dev_pm_domain_attach_by_id(pfdev->dev, i); + if (IS_ERR(pfdev->pm_domain_devs[i])) { + err = PTR_ERR(pfdev->pm_domain_devs[i]); + pfdev->pm_domain_devs[i] = NULL; + dev_err(pfdev->dev, + "failed to get pm-domain %d: %d\n", i, err); + goto err; + } + + pfdev->pm_domain_links[i] = device_link_add(pfdev->dev, + pfdev->pm_domain_devs[i], DL_FLAG_PM_RUNTIME | + DL_FLAG_STATELESS | DL_FLAG_RPM_ACTIVE); + if (!pfdev->pm_domain_links[i]) { + dev_err(pfdev->pm_domain_devs[i], + "adding device link failed!\n"); + err = -ENODEV; + goto err; + } + } + + return 0; + +err: + panfrost_pm_domain_fini(pfdev); + return err; +} + int panfrost_device_init(struct panfrost_device *pfdev) { int err; @@ -161,37 +223,45 @@ int panfrost_device_init(struct panfrost_device *pfdev) goto err_out1; } + err = panfrost_pm_domain_init(pfdev); + if (err) { + dev_err(pfdev->dev, "pm_domain init failed %d\n", err); + goto err_out2; + } + res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0); pfdev->iomem = devm_ioremap_resource(pfdev->dev, res); if (IS_ERR(pfdev->iomem)) { dev_err(pfdev->dev, "failed to ioremap iomem\n"); err = PTR_ERR(pfdev->iomem); - goto err_out2; + goto err_out3; } err = panfrost_gpu_init(pfdev); if (err) - goto err_out2; + goto err_out3; err = panfrost_mmu_init(pfdev); if (err) - goto err_out3; + goto err_out4; err = panfrost_job_init(pfdev); if (err) - goto err_out4; + goto err_out5; err = panfrost_perfcnt_init(pfdev); if (err) - goto err_out5; + goto err_out6; return 0; -err_out5: +err_out6: panfrost_job_fini(pfdev); -err_out4: +err_out5: panfrost_mmu_fini(pfdev); -err_out3: +err_out4: panfrost_gpu_fini(pfdev); +err_out3: + panfrost_pm_domain_fini(pfdev); err_out2: panfrost_reset_fini(pfdev); err_out1: @@ -208,6 +278,7 @@ void panfrost_device_fini(struct panfrost_device *pfdev) panfrost_mmu_fini(pfdev); panfrost_gpu_fini(pfdev); panfrost_reset_fini(pfdev); + panfrost_pm_domain_fini(pfdev); panfrost_regulator_fini(pfdev); panfrost_clk_fini(pfdev); } diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index a124334d69e7e93..92d471676fc7823 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -19,6 +19,7 @@ struct panfrost_job; struct panfrost_perfcnt; #define NUM_JOB_SLOTS 3 +#define MAX_PM_DOMAINS 3 struct panfrost_features { u16 id; @@ -62,6 +63,9 @@ struct panfrost_device { struct regulator *regulator; struct regulator *regulator_sram; struct reset_control *rstc; + /* pm_domains for devices with more than one. */ + struct device *pm_domain_devs[MAX_PM_DOMAINS]; + struct device_link *pm_domain_links[MAX_PM_DOMAINS]; struct panfrost_features features;