Hi i am using the latest kernel defconfig and am currently unable to get even the example rpmsg programs to run.
i have updated the device tree to disable the uart to allow the m4 core to use uart but that is the only change i have made.
are there steps i am missing?
i have found that the virtio_rpmsg_bus probe is failing:
I can also confirm that when i load the 3.0b2 tezi onto the SOM it will not throw these errors.
Since it is failing with error -12 then i would assume that this something to do with ENOMEM. However i find this hard to understand - i have attached an image of the memory usage below.
Hi @BadTalent,
Please provide detailed information apart from only Kernel/Defconfig, like:
- Which Toradex BSP are you using?
- Are you compiling your own image through Yocto, or using and modifying an existing Reference Image from Toradex?
- Have you done any modifications to the device-tree?
Best regards,
André Curvello
@andrecurvello.tx
Using BSP 5.0
Other than updating the device tree i have not modified any of the kernel code.
I have applied the following updates:
&rpmsg0 {
status = "okay";
};
&rpmsg1 {
status = "okay";
};
and removed the uart 1 from the io mux to allow m4control over tightly coupled uart
&iomuxc {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_cam1_gpios>, <&pinctrl_dap1_gpios>,
<&pinctrl_esai0_gpios>, <&pinctrl_fec2_gpios>,
<&pinctrl_gpio3>, <&pinctrl_gpio4>,
<&pinctrl_gpio_usbh_oc_n>,
<&pinctrl_lvds0_i2c0_gpio>, <&pinctrl_lvds1_i2c0_gpios>,
<&pinctrl_mipi_dsi_0_1_en>, <&pinctrl_mipi_dsi1_gpios>,
<&pinctrl_mlb_gpios>, <&pinctrl_qspi1a_gpios>,
<&pinctrl_sata1_act>, <&pinctrl_sim0_gpios>,
<&pinctrl_usdhc1_gpios>;
I have been able to get rpmsg working. turns out that the memory-region is preventing it from being configured.
to fix it i have done the following:
&rpmsg0{
/*
* 64K for one rpmsg instance:
*/
vdev-nums = <2>;
reg = <0x0 0x90000000 0x0 0x20000>;
//memory-region = <&vdevbuffer>;
};
&rpmsg1{
/*
* 64K for one rpmsg instance:
*/
vdev-nums = <2>;
reg = <0x0 0x90000000 0x0 0x20000>;
//memory-region = <&vdevbuffer>;
};
Any comments on this, @gustavo.tx ?
I haven’t tested this on the Apalis iMX8QM with the latest image. Will do and update documentation and/or notify the BSP team accordingly.