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=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 22806C04AB4 for ; Fri, 17 May 2019 10:12:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EAD04204EC for ; Fri, 17 May 2019 10:12:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728551AbfEQKMt (ORCPT ); Fri, 17 May 2019 06:12:49 -0400 Received: from mslow2.mail.gandi.net ([217.70.178.242]:37968 "EHLO mslow2.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727758AbfEQKMs (ORCPT ); Fri, 17 May 2019 06:12:48 -0400 X-Greylist: delayed 7493 seconds by postgrey-1.27 at vger.kernel.org; Fri, 17 May 2019 06:12:47 EDT Received: from relay7-d.mail.gandi.net (unknown [217.70.183.200]) by mslow2.mail.gandi.net (Postfix) with ESMTP id A559B3A3615; Fri, 17 May 2019 07:27:50 +0000 (UTC) X-Originating-IP: 80.215.154.25 Received: from localhost (unknown [80.215.154.25]) (Authenticated sender: maxime.ripard@bootlin.com) by relay7-d.mail.gandi.net (Postfix) with ESMTPSA id 4AABB2000F; Fri, 17 May 2019 07:27:39 +0000 (UTC) Date: Fri, 17 May 2019 09:27:38 +0200 From: Maxime Ripard To: Torsten Duwe Cc: Vasily Khoruzhick , David Airlie , Daniel Vetter , Rob Herring , Mark Rutland , Thierry Reding , Chen-Yu Tsai , Andrzej Hajda , Laurent Pinchart , Icenowy Zheng , Sean Paul , Harald Geyer , dri-devel , devicetree , arm-linux , linux-kernel Subject: Re: [PATCH 4/4] arm64: DTS: allwinner: a64: enable ANX6345 bridge on Teres-I Message-ID: <20190517072738.deohh5fly4jxms7k@flea> References: <20190514155911.6C0AC68B05@newverein.lst.de> <20190514160241.9EAC768C7B@newverein.lst.de> <20190515093141.41016b11@blackhole.lan> <20190516154820.GA10431@lst.de> <20190516164859.GB10431@lst.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="f4mha6snzgf75knu" Content-Disposition: inline In-Reply-To: <20190516164859.GB10431@lst.de> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --f4mha6snzgf75knu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, May 16, 2019 at 06:48:59PM +0200, Torsten Duwe wrote: > On Thu, May 16, 2019 at 09:06:41AM -0700, Vasily Khoruzhick wrote: > > > > Driver can talk to the panel over AUX channel only after t1+t3, t1 is > > up to 10ms, t3 is up to 200ms. > > This is after power-on. The boot loader needs to deal with this. The bootloader can deal with it, but the kernel will also need to. The bootloader might not be doing this because it's not been updated, the regulator might have been disabled between the time the kernel was started and the time the bridge driver probes, etc. Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com --f4mha6snzgf75knu Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRcEzekXsqa64kGDp7j7w1vZxhRxQUCXN5iagAKCRDj7w1vZxhR xSOTAQCltYqEUg7d+BcEgl5RN6diNU5EHsL/qXA4yAy1FZI9NwD/epfnmdGcVWie o0KQWW6HOXO96Su1afZmNzHrEtQffwQ= =zj1P -----END PGP SIGNATURE----- --f4mha6snzgf75knu--