From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomi Valkeinen Subject: Re: [PATCH] omap2+: add drm device Date: Thu, 24 May 2012 18:26:40 +0300 Message-ID: <1337873200.13723.17.camel@deskari> References: <1337803690-30116-1-git-send-email-andy.gross@ti.com> <1337839294.2764.7.camel@lappyti> <1337843144.2909.17.camel@deskari> <1337844098.2909.20.camel@deskari> <1337861581.12304.7.camel@deskari> Mime-Version: 1.0 Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-ntKe8tcJ8nJWNaiuUZ70" Return-path: Received: from na3sys009aog118.obsmtp.com ([74.125.149.244]:40628 "EHLO na3sys009aog118.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751364Ab2EXP0q (ORCPT ); Thu, 24 May 2012 11:26:46 -0400 Received: by lahj13 with SMTP id j13so10466901lah.39 for ; Thu, 24 May 2012 08:26:43 -0700 (PDT) In-Reply-To: Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: "Gross, Andy" Cc: Rob Clark , greg@kroah.com, linux-omap@vger.kernel.org, dri-devel@lists.freedesktop.org --=-ntKe8tcJ8nJWNaiuUZ70 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, 2012-05-24 at 10:09 -0500, Gross, Andy wrote: > On Thu, May 24, 2012 at 7:13 AM, Tomi Valkeinen w= rote: > > On Thu, 2012-05-24 at 02:44 -0600, Rob Clark wrote: > > > >> but other drivers *can* use tiler, thanks to dmabuf.. I have omap4iss > >> v4l2 camera working w/ tiler buffers on my pandaboard, for example. > >> > >> Maybe fbdev is an exception to the rule because it has no way for > >> userspace to pass it a buffer to use. But on the other hand it is a > >> legacy API so I'm not sure if it is worth loosing too much sleep over > >> that. > > > > I'm not that familiar with dmabuf, but are you saying it's not possible > > for a kernel driver to request the buffers? They _must_ come from the > > userspace? > > > > Anyway, even if it would be possible, if the tiler is a part of omapdrm > > we need omapdrm to get and use the tiler buffers. And we can't have > > omapdrm running when using omapfb, because they both use omapdss. >=20 > And that is a good point. The DSS is kind of a sticking point to anyone > having to enable DRM to get Tiler. However, omapfb doesn't currently uti= lize > DMM/Tiler features. Can't we defer generalizing until there is a > requirement for it? Sure. I just brought it up because it'd be nice and it'd be better architecturally. However, as I said, I'm not familiar with the related problems, so I take your word that it's not simple =3D). Tomi --=-ntKe8tcJ8nJWNaiuUZ70 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJPvlMwAAoJEPo9qoy8lh71zWMP/R4Q/GkhnK1jLhLy5vM5Iuq+ EwWedc0YtUDWDsbg1Q64X064QIPE8G0a/87kjTGKxD6fRo7gIp3G9qSbxeLUV7aN IsObzllqp8oPOVNnV4PqcssU6OvSvxI1Hjzdt3l8433lla1FWhZuGrFNGlzHigpB rq5l7HwJk7GiJAiQtkGIA7dD4DCRUGBQgs+f7s+xLFrIcRa7NlP18Gxu+/FhSRU3 Rd6zcjueK4yXeVRlr+JnYxbCyrT2WOhAhS47nDfPC0gjt7LJiMl/04vMJIkWrIwn /cWU5VpvRkz+S2cWNyvYPHMNkeOm9/6i9s2RzNWUyukyYbgm3Nu/LXvNRZllKXSc geTSI9uhVLt7VyhFRUUSJHirqlY7DsPojCra2YE+kNY6zg+OKD3DYhaBAz6fNNgq qpur4YZx8k4qU6N0pUAfF+LSDnuEZBtc4axW+8ODEkM70ueHG7dbs8XPRdNMoGqn Y1vLTKMS6dbn21XyXtqQij9pYe1pmbabAkCjqTJEE9MsUKTgAblUFaPSil+yABzQ Cn8/A6oXQjBkK1So+EWErPQGqaQDfGE0BBbPJ/NGjN473Klx2KMsbIpY06nbGJ8V zv9V7NWce9BtLYCI6w9O9Ly+w9/GhRUafkVsE7Cokm8weD3+uJ02tKCbOYtxQjN2 8Q0qC6I9e0SDEkrgrLRz =L3vU -----END PGP SIGNATURE----- --=-ntKe8tcJ8nJWNaiuUZ70--