From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752167AbeA2Wrj (ORCPT ); Mon, 29 Jan 2018 17:47:39 -0500 Received: from mx1.redhat.com ([209.132.183.28]:55654 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751273AbeA2Wrg (ORCPT ); Mon, 29 Jan 2018 17:47:36 -0500 From: Lyude Paul To: nouveau@lists.freedesktop.org Cc: Ben Skeggs , David Airlie , Rhys Kidd , Martin Peres , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [RFC 5/5] drm/nouveau: Introduce NvPmEnableGating option Date: Mon, 29 Jan 2018 17:45:04 -0500 Message-Id: <20180129224603.3167-6-lyude@redhat.com> In-Reply-To: <20180129224603.3167-1-lyude@redhat.com> References: <20180129224603.3167-1-lyude@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This adds the NvPmEnableGating config option to nouveau, which can be used to enable or disable clockgating for supported chipsets. Enabling can be done by passing config=NvPmEnableGating=1 To nouveau. If your chipset supports it, you'll see a message in your kernel log indicating that clockgating is enabled. Since clockgating has only had limited testing thus far, we leave this option disabled by default for now. Signed-off-by: Lyude Paul --- drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c index de07bc07abdb..bf62303571b3 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/base.c @@ -434,7 +434,9 @@ nvkm_therm_ctor(struct nvkm_therm *therm, struct nvkm_device *device, therm->attr_get = nvkm_therm_attr_get; therm->attr_set = nvkm_therm_attr_set; therm->mode = therm->suspend = -1; /* undefined */ - therm->clkgating_enabled = false; + + therm->clkgating_enabled = nvkm_boolopt(device->cfgopt, + "NvPmEnableGating", false); } int -- 2.14.3