From patchwork Fri Jun 25 13:33:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Brezillon X-Patchwork-Id: 12345095 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 AFE71C49EA7 for ; Fri, 25 Jun 2021 13:34:00 +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 8528760FE9 for ; Fri, 25 Jun 2021 13:34:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8528760FE9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com 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 759AA6EDD6; Fri, 25 Jun 2021 13:33:50 +0000 (UTC) Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8FC4D6EDC1 for ; Fri, 25 Jun 2021 13:33:48 +0000 (UTC) Received: from localhost.localdomain (unknown [IPv6:2a01:e0a:2c:6930:5cf4:84a1:2763:fe0d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: bbrezillon) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id C99B81F40FD7; Fri, 25 Jun 2021 14:33:39 +0100 (BST) From: Boris Brezillon To: dri-devel@lists.freedesktop.org Subject: [PATCH v3 12/15] drm/panfrost: Reset the GPU when the AS_ACTIVE bit is stuck Date: Fri, 25 Jun 2021 15:33:24 +0200 Message-Id: <20210625133327.2598825-13-boris.brezillon@collabora.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210625133327.2598825-1-boris.brezillon@collabora.com> References: <20210625133327.2598825-1-boris.brezillon@collabora.com> 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: Tomeu Vizoso , Steven Price , Rob Herring , Alyssa Rosenzweig , Boris Brezillon , Robin Murphy Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Things are unlikely to resolve until we reset the GPU. Let's not wait for other faults/timeout to happen to trigger this reset. Signed-off-by: Boris Brezillon Reviewed-by: Steven Price --- drivers/gpu/drm/panfrost/panfrost_mmu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index 65e98c51cb66..5267c3a1f02f 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -36,8 +36,11 @@ static int wait_ready(struct panfrost_device *pfdev, u32 as_nr) ret = readl_relaxed_poll_timeout_atomic(pfdev->iomem + AS_STATUS(as_nr), val, !(val & AS_STATUS_AS_ACTIVE), 10, 1000); - if (ret) + if (ret) { + /* The GPU hung, let's trigger a reset */ + panfrost_device_schedule_reset(pfdev); dev_err(pfdev->dev, "AS_ACTIVE bit stuck\n"); + } return ret; }