From patchwork Wed Jan 8 05:23:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Boichat X-Patchwork-Id: 206020 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2AD8C33CA1 for ; Wed, 8 Jan 2020 05:24:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 965F520705 for ; Wed, 8 Jan 2020 05:24:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Jfjo+Fag" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725774AbgAHFYF (ORCPT ); Wed, 8 Jan 2020 00:24:05 -0500 Received: from mail-pj1-f66.google.com ([209.85.216.66]:39434 "EHLO mail-pj1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726556AbgAHFYF (ORCPT ); Wed, 8 Jan 2020 00:24:05 -0500 Received: by mail-pj1-f66.google.com with SMTP id t101so559773pjb.4 for ; Tue, 07 Jan 2020 21:24:05 -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=VXWKPtv3cxE8lSp3PQIY49x0a4P+s/RHd/rRix+wGzg=; b=Jfjo+Faggwo7DaWWKVmhC7/00Vvhz+MTRYNmhAKQYX1HCOP3EYR8Lin5NwFPnmhjMY 4+Fb5Qu0e1wDWqALzow5cVbQpRrmDtK6+s0MWVLSCLeAn/oBigTNqV6pS0G3uvjzNP7g ZOYd16bXAfTR+SPI/3E9hzT5bBEzHfFjf0IP8= 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=VXWKPtv3cxE8lSp3PQIY49x0a4P+s/RHd/rRix+wGzg=; b=QgRpT8V4+GxT9BxQdUupC+Hk9irqVE0KLKkFRIbWE0zjUIaXLCludQ9VdOhoKGF1iG vNwwJzJBbkpzEj5Us8+fAwCqUKuHUur+iu7/iZS4fRj1/51xnMe7eSJKHjX6Bf2JOtOG REtRrX6PasaBAocP0cNlHjafPYT5v/6wGq4jEbHIwKGvEXHDmDWCGqlU4C+JHgFAzUyR 72MrjBX5EqJvC+1w1RFu2OsCVLKE0MfzhA2ePT50inuAHAD8UcWIqYK9cggji/bEV1wt ioi49hoeVojBBjXFoTBX8Qal6mCJIV5XAfppT3VRlDB5i9n4Pe4TzMVOGjjvyoGXCCyS 4fbA== X-Gm-Message-State: APjAAAWbQjK+hGPZGMQVxUNlyKvp6i/MgoL3lly7CJZUUJC9NP/GAepx hIcA7P0sWP9qDp3aWN5rh3wtRw== X-Google-Smtp-Source: APXvYqyHC+8oOSDbkbTqCwSPnXshCUeDVww8reRuLxI2n62N7ExPieyrDCDC2ipIyCqYctUkgXWJYA== X-Received: by 2002:a17:90a:3aaf:: with SMTP id b44mr2510426pjc.9.1578461044170; Tue, 07 Jan 2020 21:24:04 -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.12.2020.01.07.21.24.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jan 2020 21:24:03 -0800 (PST) From: Nicolas Boichat To: Rob Herring Cc: David Airlie , Daniel Vetter , Mark Rutland , Matthias Brugger , Tomeu Vizoso , Steven Price , Alyssa Rosenzweig , Liam Girdwood , Mark Brown , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, hsinyi@chromium.org Subject: [PATCH v2 3/7] drm/panfrost: Improve error reporting in panfrost_gpu_power_on Date: Wed, 8 Jan 2020 13:23:33 +0800 Message-Id: <20200108052337.65916-4-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 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org It is useful to know which component cannot be powered on. Signed-off-by: Nicolas Boichat --- Was useful when trying to probe bifrost GPU, to understand what issue we are facing. --- drivers/gpu/drm/panfrost/panfrost_gpu.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c index 8822ec13a0d619f..ba02bbfcf28c011 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c @@ -308,21 +308,26 @@ void panfrost_gpu_power_on(struct panfrost_device *pfdev) gpu_write(pfdev, L2_PWRON_LO, pfdev->features.l2_present); ret = readl_relaxed_poll_timeout(pfdev->iomem + L2_READY_LO, val, val == pfdev->features.l2_present, 100, 1000); + if (ret) + dev_err(pfdev->dev, "error powering up gpu L2"); gpu_write(pfdev, STACK_PWRON_LO, pfdev->features.stack_present); - ret |= readl_relaxed_poll_timeout(pfdev->iomem + STACK_READY_LO, + ret = readl_relaxed_poll_timeout(pfdev->iomem + STACK_READY_LO, val, val == pfdev->features.stack_present, 100, 1000); + if (ret) + dev_err(pfdev->dev, "error powering up gpu stack"); gpu_write(pfdev, SHADER_PWRON_LO, pfdev->features.shader_present); - ret |= readl_relaxed_poll_timeout(pfdev->iomem + SHADER_READY_LO, + ret = readl_relaxed_poll_timeout(pfdev->iomem + SHADER_READY_LO, val, val == pfdev->features.shader_present, 100, 1000); + if (ret) + dev_err(pfdev->dev, "error powering up gpu shader"); gpu_write(pfdev, TILER_PWRON_LO, pfdev->features.tiler_present); - ret |= readl_relaxed_poll_timeout(pfdev->iomem + TILER_READY_LO, + ret = readl_relaxed_poll_timeout(pfdev->iomem + TILER_READY_LO, val, val == pfdev->features.tiler_present, 100, 1000); - if (ret) - dev_err(pfdev->dev, "error powering up gpu"); + dev_err(pfdev->dev, "error powering up gpu tiler"); } void panfrost_gpu_power_off(struct panfrost_device *pfdev)