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diff --git a/wiki/GMSL_Camera_Setup.wiki b/wiki/GMSL_Camera_Setup.wiki new file mode 100644 index 0000000..b13b5d2 --- /dev/null +++ b/wiki/GMSL_Camera_Setup.wiki @@ -0,0 +1,76 @@ +h1. GMSL Camera Setup + +h2. Details on system configuration + +[[GMSL Configuration]] + +h2. Open issues and testing + +[[GMSL Cameras Open Issues and testing]] + +h2. Software support + +h3. External Patches: + +h4. Cogent Patches: + +https://github.com/CogentEmbedded/meta-rcar/blob/v2.23.0/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0030-Gen3-LVDS-cameras.patch + +h4. NXP Patches: + +https://community.nxp.com/docs/DOC-158531 + +h3. Linux kernel + +A base branch is available at + +* git://jmondi.org/linux-gen3#gmsl/base + +The base branch includes VIN and mux support from Niklas' branch git://git.ragnatech.se/linux#vin/mux+gmsl +with the ""max9286: More cleanups and fixes" series from Laurent on top. +vin/mux+gmsl contains the GMSL link stabilization series from Niklas: [PATCH 0/4] GMSL link stabilization. + +On top of this branch, some developers branch are available: + +* git://jmondi.org/linux-gen3#gmsl/devel/jacopo + Fixes sent out as "[PATCH v2 0/5] v4l: max9286: Additional fixes" + sensor configuration + link status monitoring + +* git://jmondi.org/linux-gen3#gmsl/devel/jacopo-i2c-bcast + gmsl/devel/jacopo branch with on top implementation of broadcast transmission of SEREN command to max9271 serializers + +h3. Config + +Configuration file for Linux-v4.13-rc5 available here: ("linux-v4.13-max9286.config":../../wiki/GMSL_Camera_Setup/linux-v4.13-max9286.config) + +h1. I2C configuration + +* The MAX9271 does appear to expose all traffic received across the GMSL link on it's I2C bus pins. +* There does not appear to be any cross-talk traffic currently. +* 'Bit-errors' have been seen ... most evidently when an address write incorrectly wrote to register 0x00 instead and 'forcefully' changed the MAX9271 address. All following writes were then 'NACKed'. +* This shows that auto-ack from the MAX9286 (which was enabled at that time) *does not* traverse the GMSL link. +* If the delays between bus configuration writes are not long enough - the following write/read can be corrupted with bit errors, or not be present on the bus at all. +** This shows that the delay after configuration writes must be conservative, and therefore at least 5 ms (recommended by the MAX9286 data sheet) rather than 3 ms or less (as suggested by the MAX9271 DS. + + +h1. I2C address space allocations + +h2. The GMSL camera set up uses the I2C-4 bus on the RCar platform. This has the following pre-existing address assignments: + +| Address | Physical | Part | SCL | SDA | Description | +| | CN29 | EXIO-Connector C | 51 | 53 | MIPI CSI-2 Zebax Connector | +| 0x20 | U6 | PCA9654EDTR2G | 14 | 15 | 8 bit IO Expander | +| 0x68 | U11 | 9FGV0841AKILF | 10 | 11 | Salvator-X Page 11 : 8 Output PCIe Clock Gen | +| 0x6a | U61 | 5P49V5923A | 9 | 8 | Salvator-X Page 3 : Versaclock5 | +| 0x70 | U31 | ADV7482WBBCZ | J8 | K8 | Salvator-X Page 19 : ADV7482 HDMI Receiver | +| 0x7C | U58 | MAX9611AUB+ | 6 | 7 | Salvator-X Page 25 : Current Sense Amplifier with ADC | +| 0x7F | U59 | MAX9611AUB+ | 6 | 7 | Salvator-X Page 25 : Current Sense Amplifier with ADC | + +h2. Maxim Expansion Board + +| Address | Physical | Part | SCL | SDA | Description | +| 0x4c | U1 | MAX9286GTN/V+ | 8 | 7 | MAX9286 GMSL De-serialiser (MAX9286 A) | +| 0x6c | U3 | MAX9286GTN/V+ | 8 | 7 | MAX9286 GMSL De-serialiser (MAX9286 A) | +| | | | | | | +| 0x30 | RDACM20 | OV10635 Default | | | OV10635 Default address | +| 0x40 | RDACM20 | MAX9271 Default | | | MAX9271 Default address | +| 0x50 | RDACM20 | Microcontroller | | | Microcontroller (MCU) Default address | |