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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 11083C388F3 for ; Tue, 1 Oct 2019 09:39:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E4683215EA for ; Tue, 1 Oct 2019 09:39:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729598AbfJAJjk (ORCPT ); Tue, 1 Oct 2019 05:39:40 -0400 Received: from mga05.intel.com ([192.55.52.43]:5346 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726986AbfJAJjk (ORCPT ); Tue, 1 Oct 2019 05:39:40 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Oct 2019 02:39:39 -0700 X-IronPort-AV: E=Sophos;i="5.64,570,1559545200"; d="scan'208";a="181637049" Received: from jnikula-mobl3.fi.intel.com (HELO localhost) ([10.237.66.161]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Oct 2019 02:39:37 -0700 From: Jani Nikula To: Pavel Machek , kernel list , intel-gfx@lists.freedesktop.org, rodrigo.vivi@intel.com, joonas.lahtinen@linux.intel.com Subject: Re: DDC on Thinkpad x220 In-Reply-To: <20190930184707.GA5703@amd> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20190930184707.GA5703@amd> Date: Tue, 01 Oct 2019 12:39:34 +0300 Message-ID: <87eezwdctl.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 30 Sep 2019, Pavel Machek wrote: > Hi! > > Thinkpad X220 should be new enough machine to talk DDC to the > monitors, right? And my monitor has DDC enable/disable in the menu, so > it should support it, too... > > But I don't have /dev/i2c* and did not figure out how to talk to the > monitor. Is the support there in the kernel? What do I need to enable > it? # modprobe i2c-dev BR, Jani. -- Jani Nikula, Intel Open Source Graphics Center