• Rob Clark's avatar
    drm/msm/mdp4: cure for the cursor blues (v2) · 7d8d9f67
    Rob Clark authored
    The hw cursor is relatively adept at triggering underflows, which
    manifest as a "blue flash" (since blue is configured as the underflow
    color).  Juggle a few things around to tighten up the timing for setting
    cursor registers in DONE irq.
    
    And most importantly, don't ever disable the hw cursor.  Instead flip it
    to a blank/empty cursor.  This seems far more reliable, as even simply
    clearing the cursor-enable bit (with no other updates in previous/
    following frames) can in some cases cause underflow.
    
    v1: original
    v2: add missing locking spotted by Micah
    
    Cc: Micah Richert <richert@braincorporation.com>
    Signed-off-by: default avatarRob Clark <robdclark@gmail.com>
    7d8d9f67
mdp4_kms.c 10.8 KB