[Openchrome-devel] [Bug 95059] DVI port failure with external TMDS transimitter for T510/T5555/C90LE thin clients

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat May 28 08:46:37 UTC 2016


--- Comment #10 from Kevin Brace <kevinbrace at gmx.com> ---
On a minor note, the recent commits do initialize DVP0 and DVP1 transmitters.
I have observed previously that they are not sometimes initialized, and
OpenChrome has the responsibility to turn them on, but previous developers were
not doing this.
There are also issues like which IGA (display controller) should be dedicated
to DVI.
Currently, OpenChrome does not have the ability to dynamically allocate the
assigned display controller, and DVI is tricky since it is expected to be
assigned to IGA1 or IGA2 depending on what display output device is presently
For example, if an LVDS FP (Flat Panel) is detected, it should always be
assigned to IGA2 since IGA2 does contain special hardware for FP.
In this particular case, DVI should be allocated to IGA1.
If the system does not contain an LVDS FP, DVI should be allocated to IGA2
since VGA is typically meant for IGA1.

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