Raspberry Pi/2560x1440 Test

/boot/config.txt

gpu_mem=256

## from 4k test
gpu_mem_1024=256
framebuffer_width=2560
framebuffer_height=1440
max_framebuffer_width=2560
max_framebuffer_height=1440
#hdmi_ignore_edid=0xa5000080
hdmi_drive=2
config_hdmi_boost=4
hdmi_pixel_freq_limit=400000000
hdmi_group=2
hdmi_mode=87
hdmi_cvt=2560 1440 48
disable_overscan=1