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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 29685CCF9E3 for ; Fri, 7 Nov 2025 21:07:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=18/hRtcZ7Jpwt5r2jIqHkABCIMqEurt/5MGnB9tK66E=; b=23lPRU1vHOBfo0wE9h/8etP+ZA /duGPvjymAUsXm/OJ+7jwnHBOtBIyuywzUTPsS9v/TpwLccqy7Cq2G1+jvTRwLFYG2mLeG/7r+Q4r JsUtru8EWM1k1U9VE5p26UXVotAiLHu58kgo0IqXDxaK6UYVjCtCd9zvVW0SxF/zY8M/HkiYbva06 Bdr573Ir9X/A4tJIVg7+84z7PrLRiZgbgXJI8BV72QcPLXUceqPyR3YiZtYPYPOVM2cpU5AB/Ziey hvJYjD+m1bNLddAbleaIwsysYI5ooeD+i2KzRtQQTDLCZ1g4H/ZEHREEFUmAzKxvBjvKVKskWZg9R 0yg3zbjQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vHTg3-000000015Oc-25Cl; Fri, 07 Nov 2025 21:07:23 +0000 Received: from metis.whiteo.stw.pengutronix.de ([2a0a:edc0:2:b01:1d::104]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vHTg1-000000015Nh-1R0z for linux-arm-kernel@lists.infradead.org; Fri, 07 Nov 2025 21:07:22 +0000 Received: from ptz.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::77] helo=[127.0.0.1]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1vHTeG-0001aK-Mg; Fri, 07 Nov 2025 22:05:32 +0100 Message-ID: Date: Fri, 7 Nov 2025 22:05:30 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RESEND v4 1/3] dt-bindings: lcdif: Document a imx6sx-lcdif fallback To: Fabio Estevam , Liu Ying Cc: marex@denx.de, stefan@agner.ch, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, shawnguo@kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org References: <20251013205155.1187947-1-festevam@gmail.com> <4bd512fd-b3df-484a-8a04-a1ed066c42fa@nxp.com> <37b8d968-a725-404e-8fd4-84c2a0bb464c@nxp.com> Content-Language: en-US From: Ahmad Fatoum In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2a0a:edc0:0:900:1d::77 X-SA-Exim-Mail-From: a.fatoum@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251107_130721_382543_F049236C X-CRM114-Status: GOOD ( 17.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On 04.11.25 21:44, Fabio Estevam wrote: > On Mon, Oct 20, 2025 at 11:53 PM Liu Ying wrote: >> On 10/20/2025, Fabio Estevam wrote: >>> On Tue, Oct 14, 2025 at 1:12 AM Liu Ying wrote: >>> >>>> Strictly speaking, I don't think i.MX6SX LCDIF is compatible with i.MX28 LCDIF >>>> because at least i.MX28 LCDIF has the version and debug{0,1,2} registers(at >>>> 0x1c0, 0x1d0, 0x1e0 and 0x1f0) while i.MX6SX LCDIF hasn't. Thanks for pointing this out. In my opinion, these registers are auxiliary and don't really change the compatibility situation as a functional driver can be written without their use, evidenced by the Linux driver doing just fine without using these registers. >>> There are some DT users, such as Barebox that matches against >>> fsl,imx28-lcdif, so we cannot remove it. >> >> Hmmm, it looks like software projects like Barebox don't really follow this DT >> binding. Is it possible to fix Barebox to avoid changing this DT binding by >> this patch? I'm assuming that Uboot has already been fixed. > > What do you think? I am sorry my prior feedback ended up stalling this series. There is a lot of regressions happening due to upstream DT changes and I am just trying to raise awareness. Another example I stumbled over today: https://lore.kernel.org/all/91f764ab-bec1-4791-b01b-3ba0803ce8f8@pengutronix.de/ I have submitted a patch[1] to barebox adding explicit i.MX6 SoloX support, so, having expressed my opinion above, please proceed as you see fit. [1]: https://lore.barebox.org/barebox/20251107210033.2229781-3-a.fatoum@barebox.org/ Cheers, Ahmad > > Thanks > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |