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iter39 Phase 7 CLOSE: vainfo + iter38 baseline PASS; Hi10P kernel/HW gap on RK3399

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Phase 7 verification on fresnel (kernel 7.0-14 / linux-fresnel-fourier).

C1 vainfo enumeration: PASS — VAProfileH264High10 + VAProfileHEVCMain10
both listed; iter38 baseline 10 profiles intact at 12 total.

C5 iter38 5/5 baseline preserved: PASS — H.264 / HEVC / VP9 / VP8 /
MPEG-2 all libva == kdirect bit-exact, no regression from iter39
backend changes.

C2 Hi10P bit-exact vs kdirect: N/A — kdirect ALSO fails with EINVAL
(0 bytes output). The kernel ctrl table advertises Hi10P + NV15
CAPTURE but RK3399 HW doesn't actually decode 10-bit H264. Verified:
S_FMT(CAPTURE, NV15) succeeds; decode submits cleanly; CAPTURE buffer
returns all-zero. xxd 64 bytes of 0x00. SW reference has 222 unique
luma bytes.

C3 Main10 bit-exact vs kdirect: untested — system x265 is 8-bit-only
build, no kvazaar/x265-hbd in Arch repos, no Main10 sample downloaded
successfully. Same kernel-vs-HW caveat may apply.

Two backend fixes landed during Phase 7 (both pushed to gitea master):

  a13215d — skip pre-S_FMT NV15 CAPTURE format probe (rkvdec only
            advertises NV15 AFTER S_FMT(OUTPUT) + S_EXT_CTRLS(SPS))
  63fed87 — advertise P010 unconditionally in QueryImageFormats
            (ffmpeg-vaapi queries before CreateContext fires; gating
            on is_10bit hid the format from early consumers)

Without these the 10-bit decode pipeline can't even start. With them
it reaches the kernel cleanly.

Memory entry filed:
  feedback_rk3399_h264_hi10p_advertised_not_functional.md
  (kernel ctrl table necessary but NOT sufficient — always cross-check
   with kdirect before treating a profile as truly HW-supported)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Markus Fritsche
2026-05-17 16:40:57 +00:00
parent 407c7c56e1
commit 7d8d720631
2 changed files with 69 additions and 2 deletions
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PRE_COMPACT_HANDOFF.md
+2 -2
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@@ -14,7 +14,7 @@ Use this doc to resume the fresnel-fourier campaign after Claude context compact
| Env-gated DIAG probes (iter29/30/33/35) | **CLEANED** | iter36 (-131 / +7 LOC) |
| α-26 mis-routed cosmetic | **REVERTED** | iter37 (1-line; rkvdec never read that field) |
| Libva multi-device probe | **DONE** | iter38 (single session serves all 5 codecs; no env override needed) |
| H264 Hi10P + HEVC Main10 sub-profile | **CODE LANDED — Phase 7 PENDING** | iter39 α-31 (backend 662f887): NV15 CAPTURE pix_fmt, synthetic-SPS bit_depth=2, NV15→P010 userspace unpack in copy_surface_to_image, P010 reporting in DeriveImage/QueryImageFormats. Self-tested (test_nv15_unpack passes on noether). Awaiting fresnel power-on for vainfo enumeration + libva.P010==kdirect.P010 bit-exact verification. |
| H264 Hi10P + HEVC Main10 sub-profile | **CLOSED 2026-05-17 with kernel/HW caveat** | iter39 α-31 (backend `63fed87`): vainfo enumeration ✓, iter38 5/5 baseline preserved ✓, Hi10P decode path reaches kernel cleanly but RK3399 HW produces all-zero CAPTURE (kdirect fails equivalently — kernel-side gap, not backend). Two Phase 7 fixes landed: `a13215d` skip pre-S_FMT NV15 probe, `63fed87` advertise P010 unconditionally. Main10 untested (no fixture). See `phase7_iter39_close.md` + memory [[feedback_rk3399_h264_hi10p_advertised_not_functional]]. |
| Codec | libva 10F sha | kdirect 10F sha | SW 10F sha | L==K | L==SW |
|---|---|---|---|---|---|
@@ -154,7 +154,7 @@ Expect: 5× PASS.
1. **Multi-context simultaneously** — current design supports only one decode context at a time across devices (device switch tears down pools). Could be expanded to per-context pools to support simultaneous mixed-codec decode. Not requested.
2. ~~**Sub-profile support**~~ — *Phase 6 LANDED 2026-05-17 (iter39 α-31, backend `662f887`)*. H264 Hi10P + HEVC Main10 wired through the backend with NV15→P010 userspace unpack. VP9 Profile 2 explicitly excluded (RK3399 rkvdec kernel ctrl caps at PROFILE_0). PRIME-side P010 emission deferred (consumers wanting P010 must use the COPY path). Phase 7 test rig at `phase7_iter39_test_rig.sh`; awaiting fresnel.
2. ~~**Sub-profile support**~~ — *CLOSED 2026-05-17 with HW caveat (backend `63fed87`)*. H264 Hi10P + HEVC Main10 wired through the backend with NV15→P010 userspace unpack. VP9 Profile 2 explicitly excluded (RK3399 rkvdec kernel ctrl caps at PROFILE_0). PRIME-side P010 emission deferred. Phase 7 verified vainfo enumeration + iter38 5/5 baseline preserved. Hi10P actual decode produces all-zero on RK3399 HW — kdirect fails equivalently, kernel-side gap. Memory entry [[feedback_rk3399_h264_hi10p_advertised_not_functional]]. Main10 untested (no fixture). Full details: `phase7_iter39_close.md`.
## Resumption sequence — iter39 Phase 7 (when fresnel is up)