Phase 2 source-read mid-execution found that v4l2_ctrl_mpeg2_*
and v4l2_ctrl_vp8_frame are byte-identical v6.12 ↔ v7.0 mainline.
On-fresnel re-trace with correct hantro-decoder bind shows MPEG-2
controls submit at = 0; the "Unable to set control(s)" log noise
is the backend's H.264/HEVC init-probe EINVAL on a non-H.264 device
(B4 backlog), not a UAPI drift.
iter5 locked scope is now vb2_dma_resv (4 patches: 3 existing
operator-authored RFC v2 + new rkvdec consumer). Criteria reduced
from 5 to 4. B4 stays in backlog.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Five Phase 1 criteria: Bug 2 closed (cap_pool readback returns real
pixels through libva); Bug 3 closed (hantro MPEG-2 + VP8 controls
accepted on new kernel); patches ship from kernel-agent (local-carry
acceptable, mainline bonus); zero codec-contract regression vs iter4;
5/5 direct-verification block restored.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
marfrit