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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id EA4CCC0218B for ; Tue, 21 Jan 2025 13:30:49 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9BA7F10E591; Tue, 21 Jan 2025 13:30:49 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="ORoPGZ87"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9BBB510E36D; Mon, 20 Jan 2025 08:51:28 +0000 (UTC) Received: from [192.168.88.20] (91-158-153-178.elisa-laajakaista.fi [91.158.153.178]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 9AED3735; Mon, 20 Jan 2025 09:50:24 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1737363025; bh=XGVXA8RFEid3r1QRColBlQttrSeJN5LcMuwzsp8evGE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ORoPGZ873bLFpXc4xj0ZeN/6Lx5dqB9w0e97Rm1RwzB6B3smvYvJOGaAS4AdO2FdK uv1FmShTizPOz7DlEX13/kmFLevZy83ajoSYNtGKPOSQRWTZfN0EY8Cf3sW8dOQTLV iLeaw24LF8z2yQ15B8wAEXOEhqialqWrnRg2dKzA= Message-ID: <469daa7f-123b-41cb-a99c-4441436d82dc@ideasonboard.com> Date: Mon, 20 Jan 2025 10:51:23 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 25/25] drm/xlnx: Compute dumb-buffer sizes with drm_mode_size_dumb() To: Thomas Zimmermann , maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@gmail.com, simona@ffwll.ch Cc: dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, imx@lists.linux.dev, linux-samsung-soc@vger.kernel.org, nouveau@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-tegra@vger.kernel.org, intel-xe@lists.freedesktop.org, xen-devel@lists.xenproject.org, Laurent Pinchart , Andy Yan , Daniel Stone References: <20250109150310.219442-1-tzimmermann@suse.de> <20250109150310.219442-26-tzimmermann@suse.de> <0ea6be58-0e04-4172-87cd-064a3e4a43bc@suse.de> <4af0b6a7-c16a-4187-bbf5-365a9c86de21@suse.de> <156804a9-3095-4c93-888f-d9041f523da6@suse.de> Content-Language: en-US From: Tomi Valkeinen Autocrypt: addr=tomi.valkeinen@ideasonboard.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Tue, 21 Jan 2025 13:30:48 +0000 X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Hi, On 20/01/2025 09:49, Thomas Zimmermann wrote: > Hi > > > Am 16.01.25 um 11:03 schrieb Tomi Valkeinen: > [...] >> Aligning video= and dumb buffers almost sounds like going backwards. >> video= parameter is bad, > > Who told you that? Video= is still the way to specify an initial display > mode to the kernel and it will remain so. You did =). "It aligns dumb buffers and video=". I understand the need for drm_driver_color_mode_format() for video=. But I think it's bad for CREATE_DUMB, at least for the platforms which have never aimed for "RGB-only". So you're not in favor of a drm_mode_size_dumb() version that does not use drm_driver_color_mode_format(), for these platforms? I'm still at loss as to why we would want to change the behavior of CREATE_DUMB. I see no upside, but I see the chance of regressions. Tomi