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camerad: setup IFE sharing#37454

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adeebshihadeh wants to merge 15 commits intomasterfrom
ife-sharing
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camerad: setup IFE sharing#37454
adeebshihadeh wants to merge 15 commits intomasterfrom
ife-sharing

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@adeebshihadeh adeebshihadeh commented Feb 27, 2026

Enables a single IFE to process two different cameras directly from their MIPI sensor streams without hitting DDR (as is normally done).

This just adds the functionality without switching yet. Once we switch, we can drop all the BPS and ICP support which will also simplify the mainline kernel migration later on.

Time-multiplex wide (PHY_0) and driver (PHY_2) cameras through IFE_0
by alternating CSID PHY_NUM_SEL between frames via sysfs. Road camera
uses IFE_1 independently. All 3 cameras run at 20fps.

Key changes:
- hw.h: Add ife_share_primary config, switch driver from BPS to IFE
- spectra: Secondary camera init (CSIPHY only, no ISP acquire/link),
  alternating P/S frame slots, PHY switching via sysfs, deferred
  clearAndRequeue, cooldown, graceful sync object error handling
- camera_qcom2: Wire IFE sharing pointers, discover CSID sysfs,
  configure FSIN delay (1669 lines ≈ 25ms) on secondary sensor
- ife.h: Dynamic IFE scaler factors (was hardcoded for 2:1 downscale)

Requires kernel patch: CSID phy_sel sysfs attribute in cam_ife_csid_dev.c

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
adeebshihadeh and others added 11 commits February 27, 2026 20:53
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Make FSIN delay sensor-aware: OX03C10 uses registers 0x3882/0x3883
  (1407 lines ≈ 17ms), OS04C10 uses 0x382a/0x382b (1669 lines ≈ 25ms)
- Configure FSIN delay before sensors_start() to avoid startup glitch
- Use primary camera's SOF timestamp for secondary frame sync
  (secondary SOF is intentionally staggered by FSIN delay)
- Skip first secondary frame if no primary SOF reference yet
  (avoids dts error when first secondary arrives before first primary)
- Use contiguous frame_id/request_id counters for IFE-sharing cameras
  (raw IDs increment for both P+S frames, causing gaps)
- Fix request_id starting at 0 (use counter + 1)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Remove the IFE-sharing guard so dcam uses full-res sensor output with
IFE downscaling, matching the other cameras' pipeline.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
IFE-shared cameras (wide + driver) run at 10fps each (alternating
within the 20Hz IFE), not 20fps. Update test to:
- Expect half the SERVICE_LIST frequency for IFE-shared cameras
- Use correct 100ms frame interval for SOF jitter checks
- Rework frame sync to compare wide/driver directly (both 10fps)
  and match road to wide by nearest timestamp instead of frame ID

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The driver FSIN offset varies by sensor type and panda timer config.
On OX03C10, the measured offset is ~41ms due to the TIM8 stagger
(25ms hardware delay) combined with PHY switching timing. Widen the
acceptable range from 5-35ms to 3-47ms to accommodate all sensors.

Also skip first 5 frames after sync in timestamp checks since timing
needs a few frames to stabilize after camera first-frame sync.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
adeebshihadeh and others added 3 commits February 28, 2026 16:15
IFE-shared cameras need faster sensor readout (~23ms vs ~33ms) to fit
within the FSIN stagger window. Full-resolution readout with
ife_downscale causes IFE sync timeouts on OS04C10 because the 33ms
readout exceeds the 25ms stagger offset between primary and secondary.

Restore the ife_sharing guard for ife_downscale_configure(), but use a
cleaner check that handles both primary and secondary cameras.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The FSIN stagger offset varies significantly by sensor type (~41ms on
OX03C10, ~50ms on OS04C10). Instead of asserting a specific range,
only verify that the offset is consistent (low jitter) across frames.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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