• Daniel Kurtz's avatar
    drm/i915/intel_i2c: refactor using intel_gmbus_get_adapter · 3bd7d909
    Daniel Kurtz authored
    Instead of letting other modules directly access the ->gmbus array,
    introduce intel_gmbus_get_adapter() for looking up an i2c_adapter
    for a given gmbus port identifier.  This will enable later refactoring
    of the gmbus port list.
    
    Note: Before requesting an adapter for a given gmbus port number, the
    driver must first check its validity using i2c_intel_gmbus_is_port_valid().
    If this check fails, a call to intel_gmbus_get_adapter() will WARN_ON and
    return NULL.  This is relevant for parts of the driver that read a port
    from VBIOS, which might be improperly initialized and contain an invalid
    port.  In these cases, the driver must fall back to using a safer default
    port.
    Signed-off-by: default avatarDaniel Kurtz <djkurtz@chromium.org>
    Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
    3bd7d909
intel_modes.c 3.78 KB