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 86B5B112583A for ; Wed, 11 Mar 2026 14:40:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DA69910E93B; Wed, 11 Mar 2026 14:40:38 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=collabora.com header.i=@collabora.com header.b="bU7krmzx"; dkim-atps=neutral Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) by gabe.freedesktop.org (Postfix) with ESMTPS id 897C310E942 for ; Wed, 11 Mar 2026 14:40:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1773240033; bh=q5ScAZDEKF2VEyUynEqfPeutGbzwz5gnnQbsnc+Tk30=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=bU7krmzx5llznTGLf+9qLLITgGJVOK/Kk/xFq1ONmp8RI8P2aQk9OP2mdUkUD04HZ AqF4MlOKAXKRAWcim76VH5CrcMy+/vt6ywj1DOhFVqHXDdLPy64lSKm314/s9Y31wn DBotw3nfaUIysFHS32T/7djBu+3BqLaFXhemwY4SttgHJuP7DXQICCf0TfIKQjC+cZ wIfRX5Dy84X6J+hkZ2kPyxfL5hjKXBODNR7Gtm19uh3cbwbIZGKIhd87muP6zkyQ28 mV2UEq83BJutaH8+aZOXFFyrctP1P15HZ+dMM7sZFIm61hS6gY3Q/SG6FqgyFWuk1q rJVgK9Eq4dwgw== Received: from [192.168.1.100] (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) (Authenticated sender: kholk11) by bali.collaboradmins.com (Postfix) with ESMTPSA id B1D5617E1005; Wed, 11 Mar 2026 15:40:32 +0100 (CET) Message-ID: <6d8d846b-f140-4294-aa2f-8fda230e0e18@collabora.com> Date: Wed, 11 Mar 2026 15:40:32 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/4] drm/prime: Limit scatter list size with dedicated DMA device To: Chen-Yu Tsai , Matthias Brugger , Chun-Kuang Hu , Philipp Zabel , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , David Airlie , Simona Vetter Cc: linux-sunxi@lists.linux.dev, Paul Kocialkowski , linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260311094929.3393338-1-wenst@chromium.org> <20260311094929.3393338-2-wenst@chromium.org> From: AngeloGioacchino Del Regno Content-Language: en-US In-Reply-To: <20260311094929.3393338-2-wenst@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Il 11/03/26 10:49, Chen-Yu Tsai ha scritto: > If a dedicated DMA device is specified for the DRM device, then the > scatter list size limit should pertain to the DMA device. > > Use the dedicated DMA device, if given, to limit the scatter list size. > This only applies to drivers that have called drm_dev_set_dma_dev() and > are using drm_prime_pages_to_sg() either directly or through the SHMEM > helpers. At the time of this writing, the former case only includes the > Rockchip DRM driver, while the latter case includes the gud, udl, and > the tiny appletbdrm and gm12u320 drivers. > > Reviewed-by: Thomas Zimmermann > Signed-off-by: Chen-Yu Tsai Reviewed-by: AngeloGioacchino Del Regno