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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 5218AC48BD5 for ; Tue, 25 Jun 2019 14:20:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 25E8A208E3 for ; Tue, 25 Jun 2019 14:20:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="rN3euY2+"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=ffwll.ch header.i=@ffwll.ch header.b="PiKb0pq4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 25E8A208E3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ffwll.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=HjTQeT0ccQGl7t9tT3pV/Py1MBHqgLpodzXnpRSYb+4=; b=rN3euY2+R7S7yZ ewgQsKvYT0j+ogLEbCkoFOF5r5Hecu0Kl6T2z2f4QvtGq7ANgdJTlcJM+ikYAH4N9JwmD4I8lN3Y8 NgqAg1NLQAJWKh3BMpsx2Cn+UPdN+E3w10oBuMOLZrV7RCbNxgncXJhdPPzrt8SgiLqQfWIkDwkJd UtDyTKZvwhox+xtUJQmmVcdLV0dAJja9B+Ns+rAlDV/cxVfyVXiq4KI/SlKQxSkghPvcrWUetuVw9 Tlbp8OvyhHR5B+QuQpP5oCnSpSFohBlby60SQXiF8/XhBeUcYkWPbPRel/TpYpenQHHxc4ohDGzM2 mfqLgPZEAtd0b5z2MAbQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hfmJL-00087K-1V; Tue, 25 Jun 2019 14:20:39 +0000 Received: from mail-ed1-x544.google.com ([2a00:1450:4864:20::544]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hfmJI-00086V-AP for linux-arm-kernel@lists.infradead.org; Tue, 25 Jun 2019 14:20:37 +0000 Received: by mail-ed1-x544.google.com with SMTP id a14so27380985edv.12 for ; Tue, 25 Jun 2019 07:20:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=sender:date:from:to:cc:subject:message-id:mail-followup-to :references:mime-version:content-disposition:in-reply-to:user-agent; bh=G6JtZL8+U2ZkwL0/tzXXiHIEAOss9zM+ZL3Pgbc8Mpk=; b=PiKb0pq4SASNR7D3rZRPPn6hYPGCPxODqKLMDAnrrKgPg9InzXFNxhgfcjJ0osnNob vyTtVKNuYim6MRswZ9WjaRBlsW8RMJPiwWKoyq3uAyYbDouZ9ZJClJkEADyVHPrEnO5E 2dv49ZPpK3sQqXzRaWmoTu0NM4VYZANoTUsRE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :mail-followup-to:references:mime-version:content-disposition :in-reply-to:user-agent; bh=G6JtZL8+U2ZkwL0/tzXXiHIEAOss9zM+ZL3Pgbc8Mpk=; b=XfRKX7SExxHLB5R1TRhHSPAGiMvD4Srk7ZqyuMW4HW+qfVMqKJxp/dLXAchWvjJNlt /K3J8nsZgwF6gQ5d2zmGmUQA9DvtnocUQ4fg1lRxAm9l99MWJMlWT2sDnzYL5UWp7bGV 5KoaMInkd2UFA7PDcKNpHBWDSFNVbyVpoqhe+uoVrR6vD/Hwsrv+Px9OaICdj8ByY/he eGtiGKusJk4sAsOXpJNKVPag24aggXIzEVIwlikvdjwribl2oweKO213Lrh/XZlJkuUF zE1adadR71+2UIs0CIFE1XhF+LZGUW8OYbMK+l1eowz4FaoNJePOI2B4rwzeJaCuc7qw 46DA== X-Gm-Message-State: APjAAAVlggyJ79eMLxNtGWe3Lq8/Rbtzr9eyLwxNo5KJjW2koQvrIrgd B0/179HHraQgGcQH9duuZWJkyg== X-Google-Smtp-Source: APXvYqzf+qJgnUeqQvG0q196yIL7BFlfF2ImhuXnDKq2Nc9RZ6ZHCnGm/JBXEdesWWdkz8OViVV3qw== X-Received: by 2002:a05:6402:78c:: with SMTP id d12mr111470360edy.160.1561472434802; Tue, 25 Jun 2019 07:20:34 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:569e:0:3106:d637:d723:e855]) by smtp.gmail.com with ESMTPSA id n15sm4863868edd.49.2019.06.25.07.20.33 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Tue, 25 Jun 2019 07:20:33 -0700 (PDT) Date: Tue, 25 Jun 2019 16:20:31 +0200 From: Daniel Vetter To: Russell King - ARM Linux admin Subject: Re: [PATCH 0/2] Associate ddc adapters with connectors Message-ID: <20190625142031.GV12905@phenom.ffwll.local> Mail-Followup-To: Russell King - ARM Linux admin , Emil Velikov , linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, Joonyoung Shim , Maxime Ripard , Maarten Lankhorst , Seung-Woo Kim , Krzysztof Kozlowski , Andrzej Pietrasiewicz , Inki Dae , David Airlie , Kyungmin Park , Kukjin Kim , dri-devel@lists.freedesktop.org, kernel@collabora.com, Sean Paul , linux-kernel@vger.kernel.org, m.szyprowski@samsung.com References: <20190625100351.52ddptvb2gizaepi@shell.armlinux.org.uk> <817ccfba-754c-6a28-8d75-63f70605fd43@collabora.com> <20190625133639.GA16031@arch-x1c3> <20190625140755.GT12905@phenom.ffwll.local> <20190625141032.5jiy2oekb3olaejd@shell.armlinux.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190625141032.5jiy2oekb3olaejd@shell.armlinux.org.uk> X-Operating-System: Linux phenom 4.19.0-5-amd64 User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190625_072036_385196_96FB3223 X-CRM114-Status: GOOD ( 12.82 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-samsung-soc@vger.kernel.org, Joonyoung Shim , Maxime Ripard , Seung-Woo Kim , Maarten Lankhorst , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , Andrzej Pietrasiewicz , Inki Dae , David Airlie , Kyungmin Park , Kukjin Kim , dri-devel@lists.freedesktop.org, Daniel Vetter , m.szyprowski@samsung.com, kernel@collabora.com, Sean Paul , linux-arm-kernel@lists.infradead.org, Emil Velikov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jun 25, 2019 at 03:10:32PM +0100, Russell King - ARM Linux admin wrote: > On Tue, Jun 25, 2019 at 04:07:55PM +0200, Daniel Vetter wrote: > > Otherwise I like this. Biggest problem I'm seeing here is rolling this out > > everywhere, this is a lot of work. And without widespread adoptions it's > > not terribly useful for userspace. > > There will be cases where it's not possible, because the I2C bus is > hidden behind a chip that doesn't give you direct access to the DDC > bus. Oh sure, plus lots of connectors where there's just not ddc bus at all. But if we only roll this out for a handful of drivers it's also not great, that's what I meant. Looking at $ git grep drm_do_get_edid there's only very few drivers where the ddc bus is hidden. There's a lot more where it's not, and I think a big series to tackle those would serve extremely well to make a case for this sysfs link. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel