We are using imx8mmevk board with MX8-DSI-OLED1A display which is working fine with 1920x1080 resolution.We are using panel-raydium-rm67191 driver for display.
How to change resolution from 1920x1080 to 640x480?
MX8-DSI-OLED1A display is specificed to work with 1920x1080 resolution according to
its datasheet. For 640x480 resolution it is necessary to attach lcd supporting that resolution
and make changes in panel-raydium-rm67191 driver : timings in struct drm_display_mode default_mode,
initialization sequence in struct cmd_set_entry mcs_rm67191 :