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890GX/HD4290 dual display question

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  • Originally posted by droidhacker View Post
    I'm fairly certain that I found some nastys in drivers/gpu/drm/drm_modes.c

    In the 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.

    This is when compared to the values calculated by the "cvt" command, i.e.
    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
    That should be fixed. Please file a bug at http://bugzilla.kernel.org or https://bugs.freedesktop.org

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    • Originally posted by agd5f View Post
      That should be fixed. Please file a bug at http://bugzilla.kernel.org or https://bugs.freedesktop.org
      https://bugzilla.kernel.org/show_bug.cgi?id=16651

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      • Well, that bug's been squashed.
        http://lists.freedesktop.org/archive...st/003223.html

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