From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomi Valkeinen Subject: Re: [PATCH] omap2+: add drm device Date: Thu, 08 Mar 2012 09:47:16 +0200 Message-ID: <1331192836.2354.7.camel@deskari> References: <1330966464-28662-1-git-send-email-rob.clark@linaro.org> <1331040371.2059.113.camel@deskari> <1331044544.2059.150.camel@deskari> <1331121928.4348.28.camel@deskari> Mime-Version: 1.0 Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-8Otv5B1jIggxI/iAVrwu" Return-path: Received: from na3sys009aog113.obsmtp.com ([74.125.149.209]:52799 "EHLO na3sys009aog113.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752371Ab2CHHrX (ORCPT ); Thu, 8 Mar 2012 02:47:23 -0500 Received: by lahl5 with SMTP id l5so213325lah.29 for ; Wed, 07 Mar 2012 23:47:20 -0800 (PST) In-Reply-To: Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: "Gross, Andy" Cc: Rob Clark , dri-devel@lists.freedesktop.org, linux-omap@vger.kernel.org, patches@linaro.org, Greg KH --=-8Otv5B1jIggxI/iAVrwu Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2012-03-07 at 09:59 -0600, Gross, Andy wrote: > On Wed, Mar 7, 2012 at 6:05 AM, Tomi Valkeinen wr= ote: > > > > Does this "DMM has become synonymous" mean that people just started > > calling TILER DMM, and thus the name has stuck, or are there technical > > reasons to handle it as DMM in the kernel? If the former, and if TILER > > is the technically exact name for it, perhaps it would make sense to > > call it TILER, as that's what (at least I) would be looking for if I > > read the TRM and try to find the code for the TILER. > > > > Tomi >=20 > Well the breakdown of the DMM/Tiler kind of goes like this. The DMM > defines a set of registers used to manipulate the PAT table that backs > the address space with physical memory. The Tiler portion of the DMM > really just describes the address space that is exposed. Depending on > what address range you access, you'll get a different mode of access > and rotation. Management of the address space is attributed to the > Tiler as well and that is where we have managed the address space and > provided APIs to reserve address space and pin/unpin memory to those > regions. >=20 > From a hardware perspective, we need access to the resources provided > by the DMM so that we can do the PAT programming and that can only be > gotten from the hwmod entry. And if you use the hwmod device entry, > you have to match the name used for that entry. Ok. Thanks for the detailed explanation =3D). Tomi --=-8Otv5B1jIggxI/iAVrwu Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJPWGQEAAoJEPo9qoy8lh71B+AP/31NkB3RFyg+3R4v/CFJt5K6 KMXc71E/I10Rw4S/CFzgIg+gMraKxvaaYvF0N0rr22VQJxaV8oUxeG1cpR7bWGQV PDGSBg/oOALPlwIpWKraLN1KzB8wjwgSTiZt1QywkFLkzZp8bEYh//3pO+EdStMb KAKkyCOGYFLBRIzAA2a9fV2bsYnB/finXF5K9LSpxVJvkSCZCoAj8AwjqHDqyjdG HcNx2sMO4vpIgb/e/E8ThThXYJrtR7ASxjT8FEgF+4J3eK9WQO8ieslr/EfSFzJi FjDlGJMnrP2P0OMcPLmqe/pOccskseP67xfVeyNUy1NROism6nxXHJWWwwF55DfA x9plALp15RoBNnujyboJqiLMsuPe0pLYhvue7wdwFrGpoSDnMKBQbECK8eZJ20Cl T1HRESOVzfdV//fe7/0YKxUeaeqr9FqOlUz17vzElzdENt0FBKpOZP93QkMn7W77 wxOgMrQJQ/QODomQEqvFL935tdMsuuOx5qlsV/E847OJMCQZjHxZcMtfYk141nvy ZFM3kwz9Gb1ITRc9UClQyfYHF98SV4/ED+61Wa8vjv/BvIhPtDrA23H99i9vcsP3 xdb/Soj+tG6t2RtAxcGcg9w4QF3kyycP/YEWFiSydpNsFGtErFEVWX03t+bqRnAF SuvyGYEGQvX7uvUbFdvs =SuYt -----END PGP SIGNATURE----- --=-8Otv5B1jIggxI/iAVrwu--