From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Ripard Subject: Re: Re: [PATCH RESEND v2 06/12] drm/sun4i: rgb: Add 1% tolerance to dclk frequency check when bridge is connected Date: Tue, 5 Feb 2019 16:41:56 +0100 Message-ID: <20190205154156.o3aa4cy6uxenkwol@flea> References: <20190203185501.8958-1-anarsoul@gmail.com> <20190203185501.8958-7-anarsoul@gmail.com> <20190204142036.vd42nvyjnjr5yeoi@flea> <0F6CBEA4-6DB6-40F1-A2FD-65101AF64F1F@aosc.io> Reply-To: maxime.ripard-LDxbnhwyfcJBDgjK7y7TUQ@public.gmane.org Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="f4nwjulqvuyeoq2w" Return-path: Sender: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org Content-Disposition: inline In-Reply-To: List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: Vasily Khoruzhick Cc: Icenowy Zheng , arm-linux , Mark Rutland , devicetree , Archit Taneja , David Airlie , linux-sunxi , dri-devel , Andrzej Hajda , Chen-Yu Tsai , Rob Herring , Thierry Reding , Laurent Pinchart , Daniel Vetter , Sean Paul List-Id: devicetree@vger.kernel.org --f4nwjulqvuyeoq2w Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline On Mon, Feb 04, 2019 at 10:50:17AM -0800, Vasily Khoruzhick wrote: > On Mon, Feb 4, 2019 at 8:29 AM Icenowy Zheng wrote: > > >> IIRC, from the previous discussion, HDMI had a tolerancy requirement > > >> in the standard. Do you know if there's such a thing for eDP? That > > >> would solve the issue for all the eDP displays at once. > > > > > >I don't have access to eDP standard - vesa.org says it's available to > > >members only. > > > > Try out to grab an old version? > > > > I remember 1.0 is open. > > I can't find anything regarding dot clock tolerance in DisplayPort > specification. I guess since the DP is a VESA spec, it's probably .5%, just like on the EDID (well, CVT). Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --f4nwjulqvuyeoq2w-- 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=-3.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_NEOMUTT 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 8B26DC282CB for ; Tue, 5 Feb 2019 15:42:16 +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 53D20217D6 for ; Tue, 5 Feb 2019 15:42:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="eXIw2Sc/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 53D20217D6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bootlin.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-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-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=kkai7ZA4Qq3/Muczo1sa+9Z/5S9qobfPDR8kfcDo+QQ=; b=eXIw2Sc/LrlmJefqp4/7lejOn Vd1wg9Oi2eXBQobYoIGKqo8OsIOu3t3XL8WLllmva4wjkhT47gtL0/DBYu328LPCQWqYSvoDj9G+x iyrR0v5rTmbD/vLLQ3l52tRPcrD7JIsvQXIyQHuoeGcW19RE9A64/UwcyVSlr9adRNkXEcsyB9Sc9 PQR4dby02qv98lqS6xXIJfwncrtF0e4xw2UvBpXt4gNoik1DSsNpGFQ8PeyCUXwx1wNYwbL6GKefP o0es88H52R/jhN1OFWpFO38tq/imcUUYBECjepN5ogRrZAFQU5GtU9HJHMER7ZKQZlbXKV8ueV5C+ DCwyR6RYg==; 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 1gr2rU-0002so-00; Tue, 05 Feb 2019 15:42:12 +0000 Received: from relay5-d.mail.gandi.net ([217.70.183.197]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gr2rP-0002oh-SS for linux-arm-kernel@lists.infradead.org; Tue, 05 Feb 2019 15:42:09 +0000 X-Originating-IP: 90.88.22.177 Received: from localhost (aaubervilliers-681-1-80-177.w90-88.abo.wanadoo.fr [90.88.22.177]) (Authenticated sender: maxime.ripard@bootlin.com) by relay5-d.mail.gandi.net (Postfix) with ESMTPSA id B5EDA1C0010; Tue, 5 Feb 2019 15:41:56 +0000 (UTC) Date: Tue, 5 Feb 2019 16:41:56 +0100 From: Maxime Ripard To: Vasily Khoruzhick Subject: Re: [linux-sunxi] Re: [PATCH RESEND v2 06/12] drm/sun4i: rgb: Add 1% tolerance to dclk frequency check when bridge is connected Message-ID: <20190205154156.o3aa4cy6uxenkwol@flea> References: <20190203185501.8958-1-anarsoul@gmail.com> <20190203185501.8958-7-anarsoul@gmail.com> <20190204142036.vd42nvyjnjr5yeoi@flea> <0F6CBEA4-6DB6-40F1-A2FD-65101AF64F1F@aosc.io> MIME-Version: 1.0 In-Reply-To: User-Agent: NeoMutt/20180716 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190205_074208_063774_1EE04C31 X-CRM114-Status: GOOD ( 14.04 ) 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: Mark Rutland , devicetree , Archit Taneja , David Airlie , Chen-Yu Tsai , dri-devel , Andrzej Hajda , linux-sunxi , Rob Herring , Thierry Reding , Laurent Pinchart , Daniel Vetter , Sean Paul , arm-linux , Icenowy Zheng Content-Type: multipart/mixed; boundary="===============4725564703596664249==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============4725564703596664249== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="f4nwjulqvuyeoq2w" Content-Disposition: inline --f4nwjulqvuyeoq2w Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Feb 04, 2019 at 10:50:17AM -0800, Vasily Khoruzhick wrote: > On Mon, Feb 4, 2019 at 8:29 AM Icenowy Zheng wrote: > > >> IIRC, from the previous discussion, HDMI had a tolerancy requirement > > >> in the standard. Do you know if there's such a thing for eDP? That > > >> would solve the issue for all the eDP displays at once. > > > > > >I don't have access to eDP standard - vesa.org says it's available to > > >members only. > > > > Try out to grab an old version? > > > > I remember 1.0 is open. >=20 > I can't find anything regarding dot clock tolerance in DisplayPort > specification. I guess since the DP is a VESA spec, it's probably .5%, just like on the EDID (well, CVT). Maxime --=20 Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --f4nwjulqvuyeoq2w Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXFmuxAAKCRDj7w1vZxhR xePYAQC+Gx6a4lg0W0oFcuBU+WOOIlWNsniL/MyN9oCcGBanDwD+LFhhc659rXF+ M2ZLf3wKo2MnMpoHEOtd4UN0ZtFAsgM= =cr7a -----END PGP SIGNATURE----- --f4nwjulqvuyeoq2w-- --===============4725564703596664249== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============4725564703596664249==--