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    drm/i915: VBT's child_device_config changes over time · 768f69c9
    Paulo Zanoni 提交于
    We currently treat the child_device_config as a simple struct, but
    this is not correct: new BDB versions change the meaning of some
    offsets, so the struct needs to be adjusted for each version.
    
    Since there are too many changes (today we're in version 170!), making
    a big versioned union would be too complicated, so child_device_config
    is now a union of 3 things: (i) a "raw" byte array that's safe to use
    anywhere; (ii)  an "old" structure that's the one we've been using and
    should be safe to keep in the SDVO and TV code; and (iii) a "common"
    structure that should contain only fields that are common for all the
    known VBT versions.
    Signed-off-by: NPaulo Zanoni <paulo.r.zanoni@intel.com>
    Reviewed-by: NRodrigo Vivi <rodrigo.vivi@gmail.com>
    Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
    768f69c9
intel_bios.c 21.8 KB