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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 3EEA2C47409 for ; Thu, 12 Dec 2019 20:36:03 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 EE3502077B for ; Thu, 12 Dec 2019 20:36:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="wQJsBnE0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EE3502077B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 724BA6E1D3; Thu, 12 Dec 2019 20:36:02 +0000 (UTC) Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by gabe.freedesktop.org (Postfix) with ESMTPS id BDEFE6E1D3 for ; Thu, 12 Dec 2019 20:36:00 +0000 (UTC) Received: from pendragon.ideasonboard.com (81-175-216-236.bb.dnainternet.fi [81.175.216.236]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 96416A2B; Thu, 12 Dec 2019 21:35:58 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1576182958; bh=jns3lG4yF9SJ1qJ0UZr0iN9a4ReAkskKE8/XSfSUMOE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=wQJsBnE0n8EacJ2jzzVRMtR35IRBSLJOoFr11byn52ff+vL8/mgtZauAgabU0t+qo uiWZjcVl6RwjzIlz0H3Hfs520q3aE118VAKvsWASr7uiCIrzmnoYZx2iTdKIk1Ngo/ Y0yG3FN6IShh+TqEg6HQiLuTjSnVm1jR/DiLHzFE= Date: Thu, 12 Dec 2019 22:35:50 +0200 From: Laurent Pinchart To: Tomi Valkeinen Subject: Re: [PATCH 2/3] ARM: dts: am437x-gp/epos-evm: drop unused panel timings Message-ID: <20191212203550.GB4892@pendragon.ideasonboard.com> References: <20191114093950.4101-1-tomi.valkeinen@ti.com> <20191114093950.4101-3-tomi.valkeinen@ti.com> <20191202130459.GH4929@pendragon.ideasonboard.com> <20191211165331.GC43123@atomide.com> <45dae8f7-2f5e-6948-5a05-dc8a09ace1fa@ti.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <45dae8f7-2f5e-6948-5a05-dc8a09ace1fa@ti.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Tony Lindgren , Jyri Sarha , Peter Ujfalusi , Thierry Reding , dri-devel@lists.freedesktop.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Tomi, On Thu, Dec 12, 2019 at 11:37:51AM +0200, Tomi Valkeinen wrote: > On 11/12/2019 18:53, Tony Lindgren wrote: > > * Laurent Pinchart [191202 13:05]: > >> Hi Tomi, > >> > >> Thank you for the patch. > >> > >> On Thu, Nov 14, 2019 at 11:39:49AM +0200, Tomi Valkeinen wrote: > >>> panel-simple now handled panel osd070t1718-19ts, and we no longer need > >>> the panel timings in the DT file. So remove them. > >> > >> Should you in that case drop the panel-dpi compatible string too, as the > >> panel-dpi bindings require panel timings in DT ? > > > > Yeah sounds like if panel-dpi is no longer usable for this device it > > should be dropped from the compatible list. > > Ok, I agree. > > Looking at the dts files, panel-dpi is used in a bunch of boards. But > we even have 3 dts files with panel-dpi, without the detailed panel > model in compatible... > > Fixing those will break the compatibility with old dtbs and new > kernel, unless we add timings-from-dt to a panel driver that handles > panel-dpi. I know, and I don't have a perfect answer for this :-( I don't see a third option, it's either breaking DT backward compatibility or adding timings parsing to a panel driver (either a new panel-dpi driver or to panel-simple). What's your preferred option ? -- Regards, Laurent Pinchart _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel