[Bug 11894] New: the second CRTC failed to put out video when using randr1.2 to change mode

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=11894

           Summary: the second CRTC failed to put out video when using
                    randr1.2 to change mode
           Product: xorg
           Version: git
          Platform: All
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: liswu at ati.com
         QAContact: xorg-team at lists.x.org


I've been testing the radeon driver for randr-1.2 lately on my FireGL V7100, I
got the code from git xf86-video-ati randr-1.2 branch.
the card has two DVI port,I connected two CRTs to the card with DVI-VGA dongle
and change output mode by issuing: xrandr --output DVI-1 --mode 1024x768(or
other mode name).the wired thing happens that output DVI-0 fail to show video
then. I have to use xrandr --output DVI-0 --mode 1024x768(or other mode name)
to unblank it.

I believe this issue is caused by function RADEONInitCRTC2Registers.when issue
randr to change DVI-1 mode, RADEONInitCRTC2Registers will be callded to define
the CRTC2 registers for requested video mode, RADEON_CRTC2_CRT2_ON bit of
register RADEON_CRTC2_GEN_CNTL was cleared in this function. 
To solve the problem, I suggest checking RADEON_CRTC2_CRT2_ON bit and keeping
the status as it is.

Some extra information about this card: DVI-0 connected to TV-DAC, and DVI-1
connected to PRIMARY-DAC, thus RADEON_CRTC2_GEN_CNTL/RADOEN_CRTC2_CRT2_ON bit
is responsible to enable CRT conneted to DVI-0.


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.