Well, kinda. Strictly we prefer M_T_BUILTIN strongest since those are modes
where the driver has said it absolutely can't do anything else (VBE). Then
we look for user-defined modes, ie, modelines from the config file. Then
we consider modes reported by the monitor via EDID. Finally if nothing has
matched yet we consider the default mode pool.
Within each of the above-mentioned classes, modes with the M_T_PREFERRED bit
take priority over other modes in the same class.
This logic ensures that the timings sent to the monitor exactly match the
timings it reported as supported, which occasionally don't match the numbers
you might get for that mode from CVT or GTF.
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