From mboxrd@z Thu Jan  1 00:00:00 1970
From: Inki Dae <inki.dae@samsung.com>
Subject: Re: drm/exynos: when to call dma_map_sg() on a GEM object?
Date: Mon, 02 Nov 2015 19:42:19 +0900
Message-ID: <56373E0B.3050608@samsung.com>
References: <5633D696.8020103@math.uni-bielefeld.de>
 <563713C4.2050309@samsung.com> <56373B0B.2050902@math.uni-bielefeld.de>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
In-reply-to: <56373B0B.2050902@math.uni-bielefeld.de>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
To: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>, Joonyoung Shim <jy0922.shim@samsung.com>, ML dri-devel <dri-devel@lists.freedesktop.org>, linux-samsung-soc <linux-samsung-soc@vger.kernel.org>, Marek Szyprowski <m.szyprowski@samsung.com>
List-Id: linux-samsung-soc@vger.kernel.org
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