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Pretty useful to debug our DP bandwidth woes. v2: Also print out the required and available link bandwidth, suggested by Chris Wilson. v3: Also print out the input parameters so that diagnosing failures to find a valid dp link configuration is possible. v4: s/Display port/DP/ to shorten the output. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>