[Intel-gfx] [PATCH 1/2] drm/i915: Detect SDVO-RGB before SDVO TV

Eric Anholt eric at anholt.net
Fri Jan 29 23:29:20 CET 2010


On Wed, 27 Jan 2010 16:32:45 +0800, yakui.zhao at intel.com wrote:
> From: Zhao Yakui <yakui.zhao at intel.com>
> 
> Some VGA/TV dual function SDVO card  with only VGA port incorrectly report all
> kinds of its connection as connected when VGA monitor is connected.
> This patch workaround it.
> 
> http://bugs.freedesktop.org/show_bug.cgi?id=25787
> 
> Signed-off-by: Zhao Yakui <yakui.zhao at intel.com>

Why should what order the connectors get set up matter?  If it's supposed
to matter, has this been tested in anything other than this guy's
particular configuration to make sure that you're not regressing other
picky encoders?

If I had to take a wild guess, this would be another manifestation of
the failure of the SDVO code to have a single encoder instance managing
the multiple connectors attached to it, so the different connectors
fight over the state of the encoder.
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