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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 0E2E8C433EF for ; Thu, 2 Jun 2022 23:36:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4DB7610FDD7; Thu, 2 Jun 2022 23:36:05 +0000 (UTC) Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 180FB10FDD7 for ; Thu, 2 Jun 2022 23:36:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1654212964; x=1685748964; h=date:message-id:from:to:cc:subject:in-reply-to: references:mime-version; bh=amzQG6lRbl+q/XFNk3BlyXcPnqrLXET0SOerCuMxjJo=; b=g2KV8kQXNRG6WZmyWGsW5ZN1223jDYiTcCu29/Fn0fdfQBl5NQ5/77ON jOVX/579PmChrMMuwEQOctLyZ4Re0RLa3uixnIf23AVTCu666nLzIwfWe esiKN67WYJcQ2EQNQGuJW6WBnSwcVvfBKyZsWQioH04A2Dq0KSBfEY8zM OQdCQAWknVAnrAxi/L6GXNf2dmQoKw56aoWAfnI6lmpo3MLZC1SZkr5mT XkjMKCS0R7FKrmdsPb6bmFpJrAs5xO36AeyXLcoQMs70+t/Z5w0mjCshl w9CFxvKICV3Z6b4gKnyOG4NI1HP2QRvHzQvmpIujp/XP4DcFGm+7pgX/x w==; X-IronPort-AV: E=McAfee;i="6400,9594,10366"; a="336771195" X-IronPort-AV: E=Sophos;i="5.91,272,1647327600"; d="scan'208";a="336771195" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jun 2022 16:36:03 -0700 X-IronPort-AV: E=Sophos;i="5.91,272,1647327600"; d="scan'208";a="668221463" Received: from adixit-mobl1.amr.corp.intel.com (HELO adixit-arch.intel.com) ([10.251.6.174]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jun 2022 16:36:03 -0700 Date: Thu, 02 Jun 2022 16:36:02 -0700 Message-ID: <87h7527i59.wl-ashutosh.dixit@intel.com> From: "Dixit, Ashutosh" To: Matt Roper In-Reply-To: References:

User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/28.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII Subject: Re: [Intel-gfx] [PATCH v2 0/3] drm/i915/gt: Expose per gt defaults in sysfs X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gfx@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Fri, 27 May 2022 16:41:28 -0700, Matt Roper wrote: > > On Thu, May 26, 2022 at 12:00:42PM -0700, Ashutosh Dixit wrote: > > Create a gt/gtN/.defaults directory (similar to > > engine//.defaults) to expose default parameter values for each > > gt in sysfs. This allows userspace to restore default parameter values > > after they may have changed. > > Drive-by comment: since this is a GT-related change, I think we're > required to Cc: dri-devel as well. Sure. > And since this is new ABI, we'd need an open source userspace consumer > or a very clear explanation why this is an exception to the rule (e.g., > if these are meant to be twiddled directly by the user rather than > accessed by userspace software). This series is in response to the following oneAPI requirement ("setting to -1 will return the frequency to the factory value"): https://spec.oneapi.io/level-zero/latest/sysman/api.html?highlight=zesfrequencysetrange#zesfrequencysetrange https://spec.oneapi.io/level-zero/latest/sysman/api.html?highlight=zesfrequencysetrange#_CPPv416zes_freq_range_t So maybe an open-source oneAPI user mode driver will be acceptable userspace? So yes not merely to be twiddled just by the user. Thanks. -- Ashutosh