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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 ECB5EC433E0 for ; Thu, 25 Feb 2021 12:47:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0AC464F0C for ; Thu, 25 Feb 2021 12:47:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231614AbhBYMr2 (ORCPT ); Thu, 25 Feb 2021 07:47:28 -0500 Received: from muru.com ([72.249.23.125]:37208 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229571AbhBYMr2 (ORCPT ); Thu, 25 Feb 2021 07:47:28 -0500 Received: from atomide.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTPS id 9632E807A; Thu, 25 Feb 2021 12:47:18 +0000 (UTC) Date: Thu, 25 Feb 2021 14:46:43 +0200 From: Tony Lindgren To: Tomi Valkeinen Cc: Sebastian Reichel , Laurent Pinchart , Nikhil Devshatwar , linux-omap@vger.kernel.org, dri-devel@lists.freedesktop.org, Sekhar Nori , hns@goldelico.com, Sebastian Reichel Subject: Re: [PATCH v4 24/80] drm/omap: dsi: move TE GPIO handling into core Message-ID: References: <20201124124538.660710-1-tomi.valkeinen@ti.com> <20201124124538.660710-25-tomi.valkeinen@ti.com> <5b469566-c926-7e1f-8872-84774b96f389@ideasonboard.com> <4432cf2c-fe15-dab0-3034-789f6d711396@ideasonboard.com> <7c852efd-560a-4dbb-ed04-e4812b343a33@ideasonboard.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7c852efd-560a-4dbb-ed04-e4812b343a33@ideasonboard.com> Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org * Tomi Valkeinen [210222 08:47]: > On 18/02/2021 07:57, Tony Lindgren wrote: > > Oh cool that you have those running again/still :) In this case there > > is no te-gpios if that might make a difference. > > No, GPIO TE is not used on OMAP4 SDP either. OK > >> So these errors start from the boot? Or only when running something > >> specific? > > > > They start from the boot when modules are loaded. > > Normally there are no updates happening unless an userspace app is > running, but I guess you have fb console enabled, with the blinking > cursor which makes the updates. > > I usually don't have fbcon enabled, but OMAP4 SDP works fine for me with > fbcon too... I'm using loadable modules with omap2plus_defconfig in case that makes a difference. Maybe there's some state preserved somewhere if deferred probe happens? > >> Is there a bootloader that initializes the display? > > > > Yes it boots with kexec. > > Is that open source? Can you disable the display setup from the > bootloader? Maybe the DSS or the panel is left into a state that for > whatever reason makes the kernel drivers break. Well that's a signed kernel booting kexec. But it has been working just fine for years now so I'd rather not blame that. > Or maybe a DSS or DSI reset via SYSCONFIG at probe would help, or panel > reset if it has such a feature. Maybe. But why would the $subject patch cause the errors? Regards, Tony