how to enable a second camera on mx95 evk board Spoiler (Highlight to read) Hello, we would like to know how to use a camera in the DSI/CSI slot of the MX95 EVK evk board. Our camera has reset and standby pins, but we cannot find any GPIO pins to control them in the MX95 EVK schematic. Hello, we would like to know how to use a camera in the DSI/CSI slot of the MX95 EVK evk board. Our camera has reset and standby pins, but we cannot find any GPIO pins to control them in the MX95 EVK schematic. Re: how to enable a second camera on mx95 evk board Hi @yipingwang Thank you. The camera we are using is the TechNexion AR0235, and we would like to use it with the CSI and CSI/DSI slots. Re: how to enable a second camera on mx95 evk board Let me confirm with the AE team. Re: how to enable a second camera on mx95 evk board Hi @yipingwang Thank you for your help, but the camera still isn't working. Do you have any suggestions? Re: how to enable a second camera on mx95 evk board
J14 A10 DSICSI_RST_SYNC → ADP5585 C0 → gpiochip9 line 6 → reset is typically active-low
J14 A11 DSICSI_EN_PWDN → ADP5585 R4 → gpiochip9 line 4 → power-down is typically active-high
Normal operation: line 6 = high , line 4 = low . Re: how to enable a second camera on mx95 evk board hi @yipingwang @yipingwang @I applied the following settings, but the camera initialization still failed hankwang_0-1790059212233.png Re: how to enable a second camera on mx95 evk board Hi @yipingwang Thank you for confirming that J14 A10 (DSICSI_RST_SYNC) and A11 (DSICSI_EN_PWDN) are controlled via U81 (ADP5585). We've confirmed the ADP5585 on our board (i2c address 0x34, reporting as adp5585-00) probes successfully and is exposed to Linux as gpiochip9 with 11 GPIO lines (0-10; line 5 is reserved for PWM per our device tree). Could you help us map these two signals to the exact ADP5585 GPIO pins (e.g. R0-R4/C0-C4 per the datasheet), and the corresponding Linux gpiochip line number (0-10)? Also, what is the correct polarity (active-high/active-low) for each signal? We've already brute-force tested all pairwise combinations of the 10 available lines (90 combinations, both pulled low simultaneously) without success — the camera's boot-state register (0x3004) remains 0x0000 in every case. A precise pin mapping from the schematic or UM12022 would let us verify directly rather than continuing to guess. Re: how to enable a second camera on mx95 evk board On the 19 mm × 19 mm i.MX 95 EVK , The reset and standby pins on the i.MX95 EVK DSI/CSI connector (J14) are controlled through the ADP5585 GPIO expander U81 , not directly by i.MX95 GPIOs:
J14 A10 – DSICSI_RST_SYNC : camera reset
J14 A11 – DSICSI_EN_PWDN : camera standby/power-down
Control voltage: 1.8 V
In the device tree, reference U81 for reset-gpios and pwdn-gpios . Use NXP’s imx95-19x19-evk-os08a20-combo.dtb overlay as the example for enabling the second camera on the shared DSI/CSI port. Re: how to enable a second camera on mx95 evk board Please confirm that you are using 19x19 or 15x15 evk?
Re: how to enable a second camera on mx95 evk board 95 and sensor must be configured in pair, take ov5640 for example,
PWDN (EN), B11
RESET (RST_B), A9
So on 95 side, A11 should be for pwdn, and B9 for reset. Looking into the 95 19x19 BB board schematic,
A11 is controlled by ADP5585 R4 pin
B9 is controlled by soc gpio3 27
So in the dts, user should configure as follows,
pinctrl_mipi_dsi_csi: mipidsigrp {
fsl,pins = <
IMX95_PAD_CCM_CLKO2__GPIO3_IO_BIT27 0x31e
>;
};
pinctrl-0 = <&pinctrl_mipi_dsi_csi>;
powerdown-gpios = <&adp5585gpio 4 GPIO_ACTIVE_HIGH>;
reset-gpios = <&gpio3 27 GPIO_ACTIVE_LOW>;
If user needs to connect to 15x15 evk board, then
pinctrl_mipi_dsi_csi_rst: mipidsirstgrp {
fsl,pins = <
IMX95_PAD_XSPI1_DATA7__GPIO5_IO_BIT7 0x31e
>;
};
pinctrl_mipi_dsi_csi: mipidsigrp {
fsl,pins = <
IMX95_PAD_XSPI1_DATA6__GPIO5_IO_BIT6 0x31e
>;
};
pinctrl-0 = <&pinctrl_mipi_dsi_csi_rst>, <&pinctrl_mipi_dsi_csi>;
powerdown-gpios = <&gpio5 6 GPIO_ACTIVE_HIGH>;
reset-gpios = <&gpio5 7 GPIO_ACTIVE_LOW>;
Re: how to enable a second camera on mx95 evk board @yipingwang I am using the 19x19 EVK board, and I have resolved the issue. Thank you. The reset pin configuration needs to be changed; J14 A10 DSICSI_RST_SYNC cannot be used.
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