About STM32MP255F GPU operation
I am porting Linux to a board that uses the STM32MP255F.
I used the BSP from the STM32MP257F-DK board.
For now, I was able to get the LCD panel to display, but the weston-graphical-session did not start.
When I added the following line to /etc/default/weston, the weston-graphical-session started:
OPTARGS=--use-pixman
The demo menu appears, and I can launch the demos.
However, the GPU demos do not run.
As I understand it, the OPTARGS=--use-pixman setting is meant for when there is no GPU.
Since the GPU demos also do not run, it seems that the GPU is not operating.
Under what conditions does the GPU fail to operate?
For reference, the Device Tree gpu section is configured as follows:
&gpu {
contiguous-area = <&gpu_reserved>;
status = "okay";
};
Another thing I am concerned about is that the initialization around usb3dr does not match the custom board, so I have disabled it.
&m33_rproc {
mboxes = <&ipcc1 0x100>, <&ipcc1 0x101>, <&ipcc1 2>;
mbox-names = "vq0", "vq1", "shutdown";
memory-region = <&cm33_cube_fw>, <&cm33_cube_data>,
<&ipc_shmem_1>, <&vdev0vring0>,
<&vdev0vring1>, <&vdev0buffer>,
<&cm33_sram2>;
st,syscfg-nsvtor = <&a35ss_syscfg 0xa8 0xffffff80>;
status = "disabled"; //"okay";
};