From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guo Tang Subject: Re: Questions about tripple display Date: Fri, 13 Jul 2012 09:44:36 -0700 Message-ID: References: <201207130859149921639@sonoartis.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1338897383==" Return-path: Received: from mail-vc0-f177.google.com (mail-vc0-f177.google.com [209.85.220.177]) by gabe.freedesktop.org (Postfix) with ESMTP id EF6BC9E76D for ; Fri, 13 Jul 2012 09:44:37 -0700 (PDT) Received: by vcbfl13 with SMTP id fl13so306925vcb.36 for ; Fri, 13 Jul 2012 09:44:37 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Daniel Vetter Cc: intel-gfx List-Id: intel-gfx@lists.freedesktop.org --===============1338897383== Content-Type: multipart/alternative; boundary=bcaec502d726ae04ee04c4b8cbc1 --bcaec502d726ae04ee04c4b8cbc1 Content-Type: text/plain; charset=ISO-8859-1 Great! Thanks for the direction. We will give it a shoot! - Guo On Fri, Jul 13, 2012 at 9:38 AM, Daniel Vetter wrote: > On Fri, Jul 13, 2012 at 6:36 PM, Guo Tang wrote: > > Hi, Daniel, > > > > Thanks for the prompt reply. From your reply looks like I still have a > > little hope. > > > > How about if I only run 1024x768@60Hz or 30Hz resolution? Will that > address > > the dotclock problem > > between LVDS and TV? > > As I've said, carefully picking a dotclock that matches up with TV or > LVDS can work, but we don't bother to support that in the driver > because imo it's not worth the hassle. If you really want to stitch > something like this together, grep for needs_tvclock in the drm/i915 > sources (or check out the lvds panel fitter code). I.e. it's by far > not as simple as just picking the same mode as e.g. on the TV. And > you'd need to restructure the kernel driver quite a bit to make it > work. > -Daniel > -- > Daniel Vetter > daniel.vetter@ffwll.ch - +41 (0) 79 364 57 48 - http://blog.ffwll.ch > --bcaec502d726ae04ee04c4b8cbc1 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Great! Thanks for the direction. We will give it a shoot!

- Guo

On Fri, Jul 13, 2012 at 9:38 AM, = Daniel Vetter <daniel@ffwll.ch> wrote:
On Fri, Jul 13, 2012 at 6:= 36 PM, Guo Tang <guo.tang@sono= artis.com> wrote:
> Hi, Daniel,
>
> Thanks for the prompt reply. From your reply looks like I still have a=
> little hope.
>
> How about if I only run 1024x768@60Hz or 30Hz resolution? Will that ad= dress
> the dotclock problem
> between LVDS and TV?

As I've said, carefully picking a dotclock that matches up with T= V or
LVDS can work, but we don't bother to support that in the driver
because imo it's not worth the hassle. If you really want to stitch
something like this together, grep for needs_tvclock in the drm/i915
sources (or check out the lvds panel fitter code). I.e. it's by far
not as simple as just picking the same mode as e.g. on the TV. And
you'd need to restructure the kernel driver quite a bit to make it
work.
-Daniel
--
Daniel Vetter
daniel.vetter@ffwll.ch - +41= (0) 79 364 57 48 - = http://blog.ffwll.ch

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