From patchwork Tue Jan 14 07:15:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Boichat X-Patchwork-Id: 11331353 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 ECEE413BD for ; Tue, 14 Jan 2020 07:16:23 +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 CB71A222C3 for ; Tue, 14 Jan 2020 07:16:23 +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="OaXWhDzn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CB71A222C3 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 823A46E2BC; Tue, 14 Jan 2020 07:16:22 +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 D88E06E2BC for ; Tue, 14 Jan 2020 07:16:20 +0000 (UTC) Received: by mail-pl1-x642.google.com with SMTP id g9so2661181plq.1 for ; Mon, 13 Jan 2020 23:16:20 -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=aLfPCVSIPmuFzsEvFRWITFE6Wzi8RULGPe0z6zRKf5k=; b=OaXWhDznHboRO3zEjD8nrdw+NPv7XDmxHexHQ18scUseKp8UXWMnxGYaQfSFy8cFnE +Ubbzc9gJeDRMbc5G+6XYetc1Q0c4ODeK1pxl54x9asrntyjC6EY07Svt1G9m8ZrwPkq ucF48ITInsC2HX4bRf9zpq+ZC+grBF3fRwtoE= 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=aLfPCVSIPmuFzsEvFRWITFE6Wzi8RULGPe0z6zRKf5k=; b=etNCJRoYLUC9xmuBw3MYQ4PUeQ0gPBX5XCL4Lr4iNxKWXiA3+HOUI/GoErwZcFZ4J9 GxdGrlpTiF5v/SMOJOwquyfLv01fsSeklzzm7aZPfGNdfycwRrL2xLN6MVoq9hejMej3 GWr9yFZcAaZ8vEGz+3rN8mZOj6zdIT1C6Mud8aOAhTLs2vxueFqt9ExLuTXJfe0EGUBs w/yW/h19771v86wF+mTiRILwB8azk0Iy7oWm4doEMW/4ufXXsXJwNDJIfAT7YXsnx+4q gE6gU2h5QHtwuoYi77QUZyMwOJw4ypVf7ZKyQFf2K/Y/63hnY9/fLyYyuuEZqDgJFJ8k /8Zg== X-Gm-Message-State: APjAAAWqpQCe0QJ/krVuqJj2qgSB1pwzucg7hflp2amK7T4qpr6eHItM f5R/u55FBthf4Xsi+nD9uvU5eQ== X-Google-Smtp-Source: APXvYqxoaFfKjcW7VC6bDMKbEbYjDWj5GXViWzYi47SIsxZBtHqGh0p0/A6VUYpSg16lvWuN86PdnA== X-Received: by 2002:a17:902:5a85:: with SMTP id r5mr18780643pli.222.1578986180443; Mon, 13 Jan 2020 23:16:20 -0800 (PST) Received: from drinkcat2.tpe.corp.google.com ([2401:fa00:1:b:d8b7:33af:adcb:b648]) by smtp.gmail.com with ESMTPSA id b4sm17092976pfd.18.2020.01.13.23.16.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jan 2020 23:16:19 -0800 (PST) From: Nicolas Boichat To: Rob Herring Subject: [PATCH v3 4/7] drm/panfrost: Add support for multiple regulators Date: Tue, 14 Jan 2020 15:15:59 +0800 Message-Id: <20200114071602.47627-5-drinkcat@chromium.org> X-Mailer: git-send-email 2.25.0.rc1.283.g88dfdc4193-goog In-Reply-To: <20200114071602.47627-1-drinkcat@chromium.org> References: <20200114071602.47627-1-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" Some GPUs, namely, the bifrost/g72 part on MT8183, have a second regulator for their SRAM, let's add support for that. We extend the framework in a generic manner so that we could support more than 2 regulators, if required. Signed-off-by: Nicolas Boichat Reviewed-by: Mark Brown --- v3: - Make this more generic, by allowing any number of regulators (in practice we fix the maximum number of regulators to 2, but this could be increased easily). - We only probe the second regulator if the device tree matching data asks for it. - I couldn't find a way to detect the number of regulators in the device tree, if we wanted to refuse to probe the device if there are too many regulators, which might be required for safety, see the thread on v2 [1]. - The discussion also included the idea of a separate device tree entry for a "soft PDC", or at least a separate driver. I'm not sure to understand the full picture, and how different vendors implement this, so I'm still integrating everything in the main driver. I'd be happy to try to make mt8183 fit into such a framework after it's created, but I don't think I'm best placed to implement (and again, the main purpose of this was to test if the binding is correct). [1] https://patchwork.kernel.org/patch/11322839/ drivers/gpu/drm/panfrost/panfrost_device.c | 25 ++++++++++++------- drivers/gpu/drm/panfrost/panfrost_device.h | 15 +++++++++++- drivers/gpu/drm/panfrost/panfrost_drv.c | 28 +++++++++++++++------- 3 files changed, 50 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c index 238fb6d54df4732..c30e0a3772a4f57 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.c +++ b/drivers/gpu/drm/panfrost/panfrost_device.c @@ -87,18 +87,26 @@ static void panfrost_clk_fini(struct panfrost_device *pfdev) static int panfrost_regulator_init(struct panfrost_device *pfdev) { - int ret; + int ret, i; - pfdev->regulator = devm_regulator_get(pfdev->dev, "mali"); - if (IS_ERR(pfdev->regulator)) { - ret = PTR_ERR(pfdev->regulator); - dev_err(pfdev->dev, "failed to get regulator: %d\n", ret); + BUG_ON(pfdev->comp->num_supplies > ARRAY_SIZE(pfdev->regulators)); + + for (i = 0; i < pfdev->comp->num_supplies; i++) { + pfdev->regulators[i].supply = pfdev->comp->supply_names[i]; + } + + ret = devm_regulator_bulk_get(pfdev->dev, + pfdev->comp->num_supplies, + pfdev->regulators); + if (ret < 0) { + dev_err(pfdev->dev, "failed to get regulators: %d\n", ret); return ret; } - ret = regulator_enable(pfdev->regulator); + ret = regulator_bulk_enable(pfdev->comp->num_supplies, + pfdev->regulators); if (ret < 0) { - dev_err(pfdev->dev, "failed to enable regulator: %d\n", ret); + dev_err(pfdev->dev, "failed to enable regulators: %d\n", ret); return ret; } @@ -107,7 +115,8 @@ static int panfrost_regulator_init(struct panfrost_device *pfdev) static void panfrost_regulator_fini(struct panfrost_device *pfdev) { - regulator_disable(pfdev->regulator); + regulator_bulk_disable(pfdev->comp->num_supplies, + pfdev->regulators); } int panfrost_device_init(struct panfrost_device *pfdev) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index 06713811b92cdf7..021f063ffb3747f 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -19,6 +20,7 @@ struct panfrost_job; struct panfrost_perfcnt; #define NUM_JOB_SLOTS 3 +#define MAX_REGULATORS 2 struct panfrost_features { u16 id; @@ -51,6 +53,16 @@ struct panfrost_features { unsigned long hw_issues[64 / BITS_PER_LONG]; }; +/* + * Features that cannot be automatically detected and need matching using the + * compatible string, typically SoC-specific. + */ +struct panfrost_compatible { + /* Supplies count and names. */ + int num_supplies; + const char * const *supply_names; +}; + struct panfrost_device { struct device *dev; struct drm_device *ddev; @@ -59,10 +71,11 @@ struct panfrost_device { void __iomem *iomem; struct clk *clock; struct clk *bus_clock; - struct regulator *regulator; + struct regulator_bulk_data regulators[MAX_REGULATORS]; struct reset_control *rstc; struct panfrost_features features; + const struct panfrost_compatible* comp; spinlock_t as_lock; unsigned long as_in_use_mask; diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index 48e3c4165247cea..db3563b80150c9d 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -510,6 +510,10 @@ static int panfrost_probe(struct platform_device *pdev) platform_set_drvdata(pdev, pfdev); + pfdev->comp = of_device_get_match_data(&pdev->dev); + if (!pfdev->comp) + return -ENODEV; + /* Allocate and initialze the DRM device. */ ddev = drm_dev_alloc(&panfrost_drm_driver, &pdev->dev); if (IS_ERR(ddev)) @@ -581,16 +585,22 @@ static int panfrost_remove(struct platform_device *pdev) return 0; } +const char * const default_supplies[] = { "mali" }; +static const struct panfrost_compatible default_data = { + .num_supplies = ARRAY_SIZE(default_supplies), + .supply_names = default_supplies, +}; + static const struct of_device_id dt_match[] = { - { .compatible = "arm,mali-t604" }, - { .compatible = "arm,mali-t624" }, - { .compatible = "arm,mali-t628" }, - { .compatible = "arm,mali-t720" }, - { .compatible = "arm,mali-t760" }, - { .compatible = "arm,mali-t820" }, - { .compatible = "arm,mali-t830" }, - { .compatible = "arm,mali-t860" }, - { .compatible = "arm,mali-t880" }, + { .compatible = "arm,mali-t604", .data = &default_data, }, + { .compatible = "arm,mali-t624", .data = &default_data, }, + { .compatible = "arm,mali-t628", .data = &default_data, }, + { .compatible = "arm,mali-t720", .data = &default_data, }, + { .compatible = "arm,mali-t760", .data = &default_data, }, + { .compatible = "arm,mali-t820", .data = &default_data, }, + { .compatible = "arm,mali-t830", .data = &default_data, }, + { .compatible = "arm,mali-t860", .data = &default_data, }, + { .compatible = "arm,mali-t880", .data = &default_data, }, {} }; MODULE_DEVICE_TABLE(of, dt_match);