I am trying to make HDMI & OLED up together on imx8mqevk. Using linux kernel 4.19.35 with Yocto project. I have tried different combinations but only one screen comes up(either HDMI or OLED). I have added sources of fsl-imx8mq-evk-dcss-rm67191.dts into fsl-imx8mq-evk.dts, but only OLED display enabled. Is there any dtb file to make both screen up?
Unfortunately, we do not have a device tree that could handle both screens, the HDMI and the OLED display. The most similar configuration that we currently have is controlling the HDMI and the MIPI to HDMI adapter at the same time. You could use our device trees to create your own configuration. However, this is on your own.