[Bug 16651] New: Output of drm_cvt_mode function incorrect for reduced blanking modes

[Bug 16651] New: Output of drm_cvt_mode function incorrect for reduced blanking modes

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16651

           Summary: Output of drm_cvt_mode function incorrect for reduced
                    blanking modes
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.35
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: adam@serbinski.com
        Regression: No


drivers/gpu/drm/drm_modes.c
function drm_cvt_mode

When parameter "reduced" is set to TRUE, the hsync_start and hsync_end values
calculated are... wrong, and the vsync_start and vsync_end values aren't
calculated at all.

Output from command "cvt -r 1920 1200":
# 1920x1200 59.95 Hz (CVT 2.30MA-R) hsync: 74.04 kHz; pclk: 154.00 MHz
Modeline "1920x1200R" 154.00 1920 1968 2000 2080 1200 1203 1209 1235 +hsync
-vsync

The values generated by drm_cvt_mode(dev,1920,1200,60,true,false,false) are:
154.00 1920 32 32 2080 1200 0 0 1235 +hsync -vsync

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[Bug 16651] Output of drm_cvt_mode function incorrect for reduced blanking modes

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16651


Adam Jackson <ajax@redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ajax@redhat.com




--- Comment #1 from Adam Jackson <ajax@redhat.com>  2010-08-23 14:32:25 ---
Try this patch:

http://lists.freedesktop.org/archives/dri-devel/2010-August/003223.html

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[Bug 16651] Output of drm_cvt_mode function incorrect for reduced blanking modes

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=16651


Adam Serbinski <adam@serbinski.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |CODE_FIX




--- Comment #2 from Adam Serbinski <adam@serbinski.com>  2010-08-24 12:25:43 ---
That did the job.

Thank you.

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