From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: Re: [RFC 4/4] drm: Add NVIDIA Tegra support Date: Wed, 11 Apr 2012 17:06:03 +0200 Message-ID: <20120411150603.GC20811@avionic-0098.adnet.avionic-design.de> References: <1334146230-1795-1-git-send-email-thierry.reding@avionic-design.de> <1334146230-1795-5-git-send-email-thierry.reding@avionic-design.de> <20120411124810.GK4296@phenom.ffwll.local> <20120411132326.GD27337@avionic-0098.adnet.avionic-design.de> <20120411133512.GL4296@phenom.ffwll.local> <20120411141108.GI27337@avionic-0098.adnet.avionic-design.de> <20120411155237.24233afc@pyramind.ukuu.org.uk> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============3639873177463227766==" Return-path: In-Reply-To: <20120411155237.24233afc-38n7/U1jhRXW96NNrWNlrekiAK3p4hvP@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: Alan Cox Cc: Joerg Roedel , devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Daniel Vetter , Colin Cross , Jon Mayo , Hiroshi Doyu List-Id: devicetree@vger.kernel.org --===============3639873177463227766== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="c3bfwLpm8qysLVxt" Content-Disposition: inline --c3bfwLpm8qysLVxt Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Alan Cox wrote: > > Maybe your question is answered by my reply to Alan's comment. The mapp= ing > > is actually done to get a linear view for the display controller which > > doesn't support SG transfers. The kernel and user-space already have vi= rtual > > linear buffers. >=20 > The framebuffer currently needs a physically contiguous map for the > console devices. Well you could vmap them but that is pretty hideous on a > 32bit platform with 32bit 1080p display plugged into it! Heh, vmap() is exactly what I do. =3D) Would you mind explaining why exactl= y it is hideous? I'll have to investigate what an appropriate alternative would look like. Thierry --c3bfwLpm8qysLVxt Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iEYEARECAAYFAk+FndsACgkQZ+BJyKLjJp85hwCfeZ5F3Cjoq694kmX7N+libe9l vi4AoKpPchBTK2lPcKWpMgHZq9ySNf/d =2Cwv -----END PGP SIGNATURE----- --c3bfwLpm8qysLVxt-- --===============3639873177463227766== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ devicetree-discuss mailing list devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org https://lists.ozlabs.org/listinfo/devicetree-discuss --===============3639873177463227766==--