[Openchrome-devel] [Bug 96397] legacy modesetting removal breaks CLE266

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Jun 9 23:01:12 UTC 2016


Kevin Brace <kevinbrace at gmx.com> changed:

           What    |Removed                     |Added
 Attachment #124397|0                           |1
        is obsolete|                            |

--- Comment #28 from Kevin Brace <kevinbrace at gmx.com> ---
Created attachment 124430
  --> https://bugs.freedesktop.org/attachment.cgi?id=124430&action=edit
Proposed CLE266 VGA TV out Bug Fix

Initializing CR6A, CR6B, and CR6C when mode setting is done

Not all the register fields of CR6A (3X5.6A), CR6B (3X5.6B), and 
CR6C (3X5.6C) were being initialized, and as a result, specifying 
the availability of TV out in the BIOS setup will lead to analog out 
(VGA) not working properly. Specifically, CR6B[7:6] and CR6C[0] 
were causing problems. CR6C controls DIP0 (Digital Interface Port 0) 
and exists at this address only in CLE266 (DIP0 is called DVP0 since 
KM400 chipset, and DVP0 control register is located at CR96.). 
This bug was observed with VIA Embedded EPIA-M mainboard (CLE266 chipset 
with VT1622 TV encoder), and likely only affects CLE266 chipset.

Signed-off-by: Xavier Bachelot <"Xavier's e-mail address">
Signed-off-by: Kevin Brace <"Kevin's e-mail address">

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