• Thierry Reding's avatar
    drm: Implement drm_modeset_lock_all_ctx() · 06eaae46
    Thierry Reding authored
    This function is like drm_modeset_lock_all(), but it takes the lock
    acquisition context as a parameter rather than storing it in the DRM
    device's mode_config structure.
    
    Implement drm_modeset_{,un}lock_all() in terms of the new function for
    better code reuse, and add a note to the kerneldoc that new code should
    use the new functions.
    
    v2: improve kerneldoc
    v4: rename drm_modeset_lock_all_crtcs() to drm_modeset_lock_all_ctx()
        and take mode_config's .connection_mutex instead of .mutex lock to
        avoid lock inversion (Daniel Vetter), use drm_modeset_drop_locks()
        which is now the equivalent of drm_modeset_unlock_all_ctx()
    v5: do not take the dev->mode_config.connection_mutex in
        drm_atomic_legacy_backoff() since drm_modeset_lock_all_ctx()
        already keeps it, enhance kerneldoc for drm_modeset_lock_all_ctx()
        (Daniel Vetter)
    Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
    Link: http://patchwork.freedesktop.org/patch/msgid/1449075005-13937-1-git-send-email-thierry.reding@gmail.comSigned-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
    06eaae46
drm_modeset_lock.h 4.34 KB