From: Daniel Vetter <daniel@ffwll.ch>
To: Paulo Zanoni <przanoni@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
DRI Development <dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH 1/2] drm/edid: adjust double-clocked cea modes
Date: Sun, 20 May 2012 17:59:42 +0200 [thread overview]
Message-ID: <20120520155942.GD5145@phenom.ffwll.local> (raw)
In-Reply-To: <CA+gsUGR=gBYWGuOML0sZCb1s88Qnwhtdy8tNMDRjMzzROF-vTA@mail.gmail.com>
On Mon, May 14, 2012 at 04:55:36PM -0300, Paulo Zanoni wrote:
> 2012/5/12 Daniel Vetter <daniel.vetter@ffwll.ch>:
> > The CEA spec has a bunch of very peculiar modes. For backwards
> > compatibility it specifies a bunch of modes that are suitable to
> > display old SD TV content. But these modes have such low pixel clocks
> > that pixels need to be doubled to reach the minimal clock of the HDMI
> > interface.
> >
>
> I just tested the 2 patches. They don't work for me... My monitor
> complains the timings are not supported, and now I get a black screen
> instead of a screen with half of the vertical pixel columns.
>
> HTOTAL_B: 0x035f02cf (720 active, 864 total)
> HBLANK_B: 0x035f02cf (720 start, 864 end)
> HSYNC_B: 0x031a02db (732 start, 795 end)
> VTOTAL_B: 0x026f023f (576 active, 624 total)
> VBLANK_B: 0x026f023f (576 start, 624 end)
> VSYNC_B: 0x02490243 (580 start, 586 end)
>
> I believe the timings sent to the hardware must be the ones we were
> already sending before the patches...
Well, that is what actually _should_ happen. The crtc doubles every pixel,
so all horizontal timings should be twice what we program into the
registers. Looks like something is still amiss :(
-Daniel
--
Daniel Vetter
Mail: daniel@ffwll.ch
Mobile: +41 (0)79 365 57 48
next prev parent reply other threads:[~2012-05-20 15:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-12 22:07 [PATCH 1/2] drm/edid: adjust double-clocked cea modes Daniel Vetter
2012-05-12 22:07 ` [PATCH 2/2] drm/i915: properly implement doubleclocked hdmi modes Daniel Vetter
2012-05-14 17:37 ` [PATCH 1/2] drm/edid: adjust double-clocked cea modes Adam Jackson
2012-05-14 19:29 ` Paulo Zanoni
2012-05-14 19:43 ` Paulo Zanoni
2012-05-15 15:33 ` Adam Jackson
2012-05-15 18:50 ` mesa compile error Kong, Bertrand C
2012-05-16 1:47 ` Eugeni Dodonov
2012-05-18 20:28 ` Kong, Bertrand C
2012-05-19 18:29 ` [PATCH 1/2] drm/edid: adjust double-clocked cea modes Daniel Vetter
2012-05-14 19:55 ` Paulo Zanoni
2012-05-20 15:59 ` Daniel Vetter [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-05-12 22:02 Daniel Vetter
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