Camera Device Tree
The Device Tree is used for storing platform-specific configuration for system resources used by Camera, which provides and regulates access to Camera FW resources, I2C, GPIO, powercontrol and synchronization signal generation functionalities among clients.
The properties are consumed by the Camera SW SIPL Camera Device Access Control (CDAC) resource manager on QNX, and its analogue on Linux, the Camera Linux KMD, composed ofthe cdi-mgr and cdi-tsc modules.
On DRIVE OS Linux, the platform configuration for Camera IP (i.e., RCE, NVCSI, VI, ISP) is part of the Host1x Device Tree node and documented in the NvMedia Device Tree Documentation.There is no equivalent Device Tree configuration on DRIVE OS QNX.
Resource Block Configuration
The `sipl_devblk_X` nodes contain the configuration for each resource block, which are software representations of deserializer groups in hardware.The `X` should denote the ID for the dedicated I2C bus of each deserializer block. GPIO pins for ordinary input and output, and interrupts are also configured in this node.
sipl_devblk_0 {
status = "okay";
compatible = "nvidia,cdi-mgr"; tegra {
i2c-bus = <0>;
csi-port = <0>;
interrupt-parent = <&tegra_main_gpio>;
interrupts = <TEGRA194_MAIN_GPIO(P, 5) 2>; /* GMSLA_STATUS_OC :
falling edge sensitive */
gpios {
gpio@0 {
index = <0>;
nvgpio-line = <&nvgpio_errb_lock_err_a>; intr-edge-falling;
};
gpio@1 {
index = <1>;
nvgpio-line = <&nvgpio_cam_err_a>; intr-edge-rising;
};
};
};
i2c_addr_pools {
i2c-addrs-phys = <0x0 7>,
<0x10 1>,
<0x18 1>;
i2c-addrs-virt = <0x43 12>,
<0x57 8>,
<0x65 12>;
};
deserializer {
addr = <0x29>; /* 7 bit slave address */ reg_len = <16>; /* 16 bit register length */ dat_len = <8>; /* 8 bit data length */
des_i2c_port = <0>; /* I2C port number of the deserializer */
/* des_tx_port = <0>;*/ /* CSI Tx port number. Define des_tx_port only if the dedicated output Tx port is required */
dphy_rate_x2 = <2500000>; /* Data rate in DPHY x2. Unit size is
kbps */
dphy_rate_x4 = <2500000>; /* Data rate in DPHY x4. Unit size is
kbps */
cphy_rate_x2 = <2000000>; /* Data rate in CPHY x2. Unit size is
ksps */
cphy_rate_x4 = <2000000>; /* Data rate in CPHY x4. Unit size is
ksps */
gid = <3870>; /* Owning GID (Deserializer) */
links = <0 1 2 3>; /* Number and indices of valid links */ links_gid = <3870>; /* Owning GID (Deserializer's links) */
};
pwr_ctrl {
power_port = <0>;
};
};