iter10 closed negative at Phase 0 (Bommarito unreachable on RK3399).
Saved kernel build + reboot cycle by source-tree reachability check.
iter11 opens with Bug 5 (HEVC libva all-zero) as research target.
Replay iter8/iter9 methodology: deep strace HEVC libva vs kdirect,
decode V4L2_CID_STATELESS_HEVC_* control payload bytes, find the
diff that causes rkvdec to produce all-zero output for libva while
kdirect's submission produces correct decode.
In scope: src/h265.c (libva HEVC), Phase 3 strace + byte-decode.
Out of scope: ext_sps_st/lt_rps (VDPU381/383-only, not RK3399),
kernel patches until empirical evidence of a kernel-side gap.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
