From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D351C433EF for ; Mon, 28 Feb 2022 17:38:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238030AbiB1RjU (ORCPT ); Mon, 28 Feb 2022 12:39:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238308AbiB1RhO (ORCPT ); Mon, 28 Feb 2022 12:37:14 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0FCEF89CF8; Mon, 28 Feb 2022 09:32:06 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id E547A61358; Mon, 28 Feb 2022 17:32:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 04297C340E7; Mon, 28 Feb 2022 17:32:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1646069525; bh=OdVa2ugLA2SYLg1Q1Zk4v0F51Z57H51iaDsKFNlaeLQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iZXFMlQH+HaXBCOyuCa+3zewQVBQzEoJPUuplD7R9BSicI2sc2aqy0kob8e2SQiYA sj77w/65Ws78Im1gK2Y3K8z5QPYaqS384Ld3j4RDOTAVbpmiQuyqtNuKQXrofzw4+O hUMqHlrgUDBkr0rTxvWQOdvRcG6caF/M/2k7zvqg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , Ben Skeggs , Lyude Paul , Karol Herbst Subject: [PATCH 5.4 51/53] Revert "drm/nouveau/pmu/gm200-: avoid touching PMU outside of DEVINIT/PREOS/ACR" Date: Mon, 28 Feb 2022 18:24:49 +0100 Message-Id: <20220228172252.022032029@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220228172248.232273337@linuxfoundation.org> References: <20220228172248.232273337@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Karol Herbst This reverts commit c9ec3d85c0eef7c71cdc68db758e0f0e378132c0. This commit causes a regression if 4cdd2450bf739bada353e82d27b00db9af8c3001 is not applied as well. This was fixed for 5.16, 5.15 and 5.10. On older stable branches backporting this commit is complicated as relevant code changed quite a bit. Furthermore most of the affected hardware barely works on those and users would want to use the newer kernels anyway. Cc: stable@vger.kernel.org # 5.4 4.19 and 4.14 Cc: Ben Skeggs Cc: Lyude Paul Link: https://gitlab.freedesktop.org/drm/nouveau/-/issues/149 Signed-off-by: Karol Herbst Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c | 37 ++++++++++--------------- 1 file changed, 16 insertions(+), 21 deletions(-) --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/base.c @@ -88,13 +88,20 @@ nvkm_pmu_fini(struct nvkm_subdev *subdev return 0; } -static void +static int nvkm_pmu_reset(struct nvkm_pmu *pmu) { struct nvkm_device *device = pmu->subdev.device; if (!pmu->func->enabled(pmu)) - return; + return 0; + + /* Inhibit interrupts, and wait for idle. */ + nvkm_wr32(device, 0x10a014, 0x0000ffff); + nvkm_msec(device, 2000, + if (!nvkm_rd32(device, 0x10a04c)) + break; + ); /* Reset. */ if (pmu->func->reset) @@ -105,37 +112,25 @@ nvkm_pmu_reset(struct nvkm_pmu *pmu) if (!(nvkm_rd32(device, 0x10a10c) & 0x00000006)) break; ); + + return 0; } static int nvkm_pmu_preinit(struct nvkm_subdev *subdev) { struct nvkm_pmu *pmu = nvkm_pmu(subdev); - nvkm_pmu_reset(pmu); - return 0; + return nvkm_pmu_reset(pmu); } static int nvkm_pmu_init(struct nvkm_subdev *subdev) { struct nvkm_pmu *pmu = nvkm_pmu(subdev); - struct nvkm_device *device = pmu->subdev.device; - - if (!pmu->func->init) - return 0; - - if (pmu->func->enabled(pmu)) { - /* Inhibit interrupts, and wait for idle. */ - nvkm_wr32(device, 0x10a014, 0x0000ffff); - nvkm_msec(device, 2000, - if (!nvkm_rd32(device, 0x10a04c)) - break; - ); - - nvkm_pmu_reset(pmu); - } - - return pmu->func->init(pmu); + int ret = nvkm_pmu_reset(pmu); + if (ret == 0 && pmu->func->init) + ret = pmu->func->init(pmu); + return ret; } static int