From: Adam Jackson <ajax@redhat.com>
To: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm: parse color format support for digital displays
Date: Fri, 15 Apr 2011 15:36:22 -0400 [thread overview]
Message-ID: <4DA89E36.2040803@redhat.com> (raw)
In-Reply-To: <20110415121931.42a24970@jbarnes-desktop>
On 4/15/11 3:19 PM, Jesse Barnes wrote:
> Or is there a CEA block extension that allows for more granularity?
CEA has bits for the two YCbCr formats too, which we should also parse
since there's plenty of 1.3+CEA blocks in the world thanks to HDMI. For
CEA blocks version 2 and up (version number in byte 2 of the CEA block,
zero-based indexing), (1 << 5) of byte 3 is 4:4:4 and (1 << 4) is 4:2:2.
Same byte as what we already check for EDID_BASIC_AUDIO, if that's any
clearer. CEA spec contains the same language about always supporting
RGB though.
I don't have a good answer for what to do if you have a 1.4+CEA block
and the two bitfields are inconsistent, besides violence against the
monitor vendor.
- ajax
next prev parent reply other threads:[~2011-04-15 19:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-15 18:40 [PATCH] drm: parse color format support for digital displays Jesse Barnes
2011-04-15 19:13 ` Adam Jackson
2011-04-15 19:19 ` Jesse Barnes
2011-04-15 19:27 ` Jesse Barnes
2011-04-15 19:36 ` Adam Jackson [this message]
2011-04-15 19:44 ` Jesse Barnes
-- strict thread matches above, loose matches on Subject: below --
2011-04-15 20:48 Jesse Barnes
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