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=-0.9 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS 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 102E0C282D7 for ; Sun, 3 Feb 2019 01:33:18 +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 CB2C420856 for ; Sun, 3 Feb 2019 01:33:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="TDIzRrmm"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="K+Vx9QI8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CB2C420856 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com 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:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=nOQlmVqmVBnMYnMJ28qGUQCjs52Sgjlbag8pj5/Llp0=; b=TDIzRrmmYRvbpZ AezNYR2nUoTc58YkUGIs/7Vxc8yOiez9pMLUoOMFI2R2d9h0pENj6uFsRKAg7p1dZNBFoG4dX2fTa 3lqEJbxPLW52a3ug181rIS0OsMIMsAuooz0w1FiyyjcvPBShbe5ax484WaoKb+uz9qiOu+BAh6IQP FTlPa+0wZtVsLuQqjqzV9jI4+9vscB8EvFqt1+GUlSXmvSHarWydRNyrRe9V0jWXjQHAtakN6sTKl OJp9+SamPmuu8MKoOb4WP57MnutIUNB5BbqHIJ33U/a5jhR2EKrxGE1a/rhB2ROCORt5w1XnR7pnR 1uM6SrYGazuO6ub+NDUg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gq6ep-0006EM-VZ; Sun, 03 Feb 2019 01:33:15 +0000 Received: from mail-oi1-x243.google.com ([2607:f8b0:4864:20::243]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gq6en-0006Dh-2A for linux-arm-kernel@lists.infradead.org; Sun, 03 Feb 2019 01:33:14 +0000 Received: by mail-oi1-x243.google.com with SMTP id w13so8901574oiw.9 for ; Sat, 02 Feb 2019 17:33:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=b2rZqsmXUinV92RCK3JMrvsiT5FW5NXrFzy/UPpdOXo=; b=K+Vx9QI8Yw9w+iEQ5djyBvPEhx5d4CLj5jJcTCXob7BtVU+j3KmN8G3efmB2Zz7UbU in8J521sJraDLba4BTXARR8lhqRLHLAve4oLMVmK+QhWVoO0YhWQaJDFmTQaT6ILQfLK T2oykvaQTouXEzplootYu5h//m9GyJZQ/jkkl4v6dIsFl+dbI0AGjecsbz7IoZG8HylY 3RzxXUCPOILS3EfdKkev2uOVEhoqGk6Hh+T8NuJIa/00Rxts4GnZ89vg6+dDjV6rxYfy Cc3A7YjBm/gipveIDdJd0GG3zuAk6MZel6C/TXL3mNTmhXtj0oP4MXgmdnAco1JXcVO7 /1bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=b2rZqsmXUinV92RCK3JMrvsiT5FW5NXrFzy/UPpdOXo=; b=q3c/ziBqNUeUIbQuXfqhq9SBdGm2MgL8ALzwwuchxLBZ6bIMUvlEiP7uamKcOG4Drr xR9MSUD8yHxeFhINROlVD+s3szVoYkjeKWPhLMvcPIXJEXTLTKmhXqKwgLOQ7TOizip8 dsalSW7nwExuTDO10drcU51oMmty2f5jTMxT928dV7u8ccqQ/yYbcWZMmtjpZaJDA3Kf 7HgeeCgLcgv7Ye2iWmA9/RuUKXmRpxlepPLLrIneuJac/dMzwkFM6IjkZEOKfqMoI5Ur hKUqvP9DuixLHbvhM/LZUBGsjj+vQUOG+R9Mmn+lAnZvMWayjLN9aXj5ABnetdnvJrpc RWow== X-Gm-Message-State: AHQUAuYouq55K1FeO+FeXcCg6x+5wnpNqar/+IGAD6gwHU6wPXVkPZZ6 iv80kPrY/WbbV9RmTBepjFA4CjjsnxOYIfQww7M= X-Google-Smtp-Source: AHgI3IadzqU3/VlJYXkrAWtXpdIzg8LS8tCNdb6IXKAaHs5txitejuJQHv4vPtq0bjKHOD1uo5EY/i363+DG2/ddeh8= X-Received: by 2002:aca:3904:: with SMTP id g4mr14282408oia.24.1549157587966; Sat, 02 Feb 2019 17:33:07 -0800 (PST) MIME-Version: 1.0 References: <20181018073327.64942-1-icenowy@aosc.io> <20181018094258.oahlopafvm2udvoe@flea> <1585874.9P5eR8PMbl@avalon> In-Reply-To: <1585874.9P5eR8PMbl@avalon> From: Vasily Khoruzhick Date: Sat, 2 Feb 2019 17:32:42 -0800 Message-ID: Subject: Re: [PATCH 9/9] [DO NOT MERGE] drm/sun4i: rgb: Add 5% tolerance to dot clock frequency check To: Laurent Pinchart X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190202_173313_128682_AA00884A X-CRM114-Status: UNSURE ( 9.37 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree , Maxime Ripard , Linux Kernel Mailing List , dri-devel , Dave Airlie , linux-sunxi , Rob Herring , Daniel Vetter , Chen-Yu Tsai , Linux ARM , Icenowy Zheng 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 Thu, Oct 18, 2018 at 4:31 AM Laurent Pinchart wrote: > Given that the tolerance is a property of the panel or bridge, I agree with > Daniel that it should be implemented there, or at least in cooperation with > drm_panel and drm_bridge. Clock tolerance is not specified in ANX6345 datasheet. > Semi-related information, I think the CEA and VESA standards allow a 0.5% > clock tolerance. What is the maximum clock frequency deviation required for > this platform ? This particular platform requires ~1% deviation. E.g. on Pinebook with 768p panel: requested clock: 73.0 MHz, real clock: 72.296296 MHz (0.96%) on Pinebook with 1080p panel: requested clock: 138.5 MHz, real clock: 138.461538 MHz (0.03%) So unfortunately 0.5% is not enough. Regards, Vasily _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel