How can i use drm to render 4 cam uyvy data

Referenct to “video_dec_drm.cpp”,the funcation of “ui_render_loop_fcn” use the “createDumbFB” api, how can i render 4 camera uyvy data syn …
/**
* It’s kind of trick to distinguish the platforms with plane_count.
* We’d better decide target window with the real hardware configuration.
* By default,
* TX1:
* CRTC 0: primary(win_A), overlay planes(win_B & win_C & win_D)
* CRTC 1: primary(win_A), overlay planes(win_B & win_C)
* TX2:
* CRTC 0: primary(win_A), overlay planes(win_B & win_C)
* CRTC 1: primary(win_A), overlay planes(win_B)
* CRTC 2: primary(win_A)
* NOTE: The plane_count implies the overlay windows
*/

Hi,
Please refer to
How can i modify "video_dec_drm.cpp" to display 6 camera video - #2 by DaneLLL

This would need significant customization. For a quick solution, you may try gstreamer.