edb7251bf3
Dahua-OEM 2 MP camera. The SC223A is on hardware I2C0 routed to the VI-RAW pads (0x112c0060/0x64 func2) rather than the default mipi-sensor pads (0x30/0x34 func1) the SDK probes, and needs a 27 MHz MCLK (0x120100f0=0x19; SDK default 0x11/div4 leaves it unresponsive). S71devmem re-muxes the pads, selects the SENSOR_RSTN reset (GPIO8_7 func2) and fixes MCLK after S70vendor/load_goke; the stock open_sensor_i2c then reaches the sensor over /dev/i2c-0. No kernel module needed. Verified on hardware: chip-id 0xcb3e over HW I2C0, MIPI lock 1920x1080 zero errors, majestic streams correct colour 1080p. Co-authored-by: build <build@local> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
39 lines
1.5 KiB
Markdown
39 lines
1.5 KiB
Markdown
![OpenIPC logo][logo]
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## OpenIPC Builder
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_Experimental system for building OpenIPC firmware for known devices_
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### Release notes for the device
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**CP Plus CP-UNC-TA21L2C** — Dahua-OEM 2 MP full-colour bullet/turret camera.
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| SoC | Goke **gk7205v200** (lite), ARM Cortex-A7 |
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| Sensor | SmartSens **SC223A** (chip-id `0xcb3e`), 2-lane MIPI, 1080p30 |
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| Flash | 16 MiB SPI-NOR (XM25QH128); built with the standard 8 MiB layout |
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| Wi-Fi | none (wired-only) |
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| Audio | present on the hardware; not wired up in this profile yet |
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#### Board specifics
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The SC223A on this board is on the SoC's **hardware I2C0**, routed to the
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**VI-RAW** pads (`0x112c0060/0x64`, func2) instead of the default mipi-sensor
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pads (`0x112c0030/0x34`, func1) that the SDK `board=demo` bring-up probes. The
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sensor also needs a 27 MHz MCLK (`0x120100f0 = 0x19`, div6); the SDK default
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`0x11` (div4) leaves it unresponsive. Both are handled in
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`general/overlay/etc/init.d/S71devmem`, which runs after `S70vendor`
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(`load_goke`) and before `S95majestic`. No kernel module is required — the
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stock `open_sensor_i2c` reaches the sensor over `/dev/i2c-0` once the pads are
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muxed. Sensor reset/enable is `GPIO8_7` (`SENSOR_RSTN`, func2).
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Verified on hardware: chip-id `0xcb3e` over HW I2C0, MIPI PHY lock at
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1920x1080 with zero error counters, majestic streams correct colour 1080p.
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#### TODO
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- Characterise and wire up the IR-cut / night-mode GPIOs.
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- Enable audio.
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[logo]: https://openipc.org/assets/openipc-logo-black.svg
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