I aim TO drive a mipi display screen on STM32MP257F-EV1, so I have to understand the DRM framework.
After flash the new firmware, I found that the modetset always shows errors, so I want to confirm whether the support in this aspect is OK? But watching your previous video, it can drive LVDS screen, so I feel very strange, is there anything else I need to pay attention to?
STM32_Programmer_CLI -c port=usb1 -w ./flashlayout_st-image-weston/optee/FlashLayout_sdcard_stm32mp257f-ev1-ca35tdcid-ostl-m33-examples-optee.tsv
root@stm32mp2:~# modetest -M stm
failed to open device 'stm': No such file or directory
as you can see, all are failed.
root@stm32mp2:~# modetest
trying to open device 'i915'...failed
trying to open device 'amdgpu'...failed
trying to open device 'radeon'...failed
trying to open device 'nouveau'...failed
trying to open device 'vmwgfx'...failed
trying to open device 'omapdrm'...failed
trying to open device 'exynos'...failed
trying to open device 'tilcdc'...failed
trying to open device 'msm'...failed
trying to open device 'sti'...failed
trying to open device 'tegra'...failed
trying to open device 'imx-drm'...failed
trying to open device 'rockchip'...failed
trying to open device 'atmel-hlcdc'...failed
trying to open device 'fsl-dcu-drm'...failed
trying to open device 'vc4'...failed
trying to open device 'virtio_gpu'...failed
trying to open device 'mediatek'...failed
trying to open device 'meson'...failed
trying to open device 'pl111'...failed
trying to open device 'stm'...failed
trying to open device 'sun4i-drm'...failed
trying to open device 'armada-drm'...failed
trying to open device 'komeda'...failed
trying to open device 'imx-dcss'...failed
trying to open device 'mxsfb-drm'...failed
trying to open device 'simpledrm'...failed
trying to open device 'imx-lcdif'...failed
no device found
by the way,
https://wiki.stmicroelectronics.cn/stm32mpu/wiki/Getting_started/STM32MP2_boards/STM32MP257x-EV1/Develop_on_Arm%C2%AE_Cortex%C2%AE-A35/Modify,_rebuild_and_reload_the_Linux%C2%AE_kernel
the part
Modify a built-in Linux® kernel device driver↑
the added log never success for me.
static int stm_drm_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct drm_device *ddev;
int ret;
[...]
DRM_INFO("Simple example - %s\n", __func__);
return 0;
[...]
}
