The retry added while chasing the 2.13.0 hwdec regression never fires:
mpv probes hwdec interop lazily at the first decode attempt, and its
failure does not fail mpv_render_context_create, so the deep config never
gets rejected and the 8-bit tier is never reached. The actual regression
was the libmpv build losing the DRM providers, fixed in the previous
commit. Remove the dead retry and its prefer_deep plumbing, and correct
the pre-flight comment that claimed the interop probe runs at context
creation.
edde746
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