RV1106 (ultra w) LVGL + DRM
Posted: 2026-01-24 7:58
Hi i trying to use DRM with LVGL 8.3.10. It forks well with fb0 output, but with DRM i have an error:
DRM_ROCKCHIP [=y]
Permissions:
ls -l /dev/dri/
total 0
drwxr-xr-x 2 root root 80 Jan 24 07:22 by-path
crw-rw-rw- 1 root video 226, 0 Jan 24 07:22 card0
crw-rw-rw- 1 root video 226, 128 Jan 24 07:22 renderD128
I add for lvgl
Whats wrong and what i should do else?
DRM is enabled in kernel.drm: Found plane_id: 55 connector_id: 70 crtc_id: 66
drm: 800x480 (85mm X 85mm) pixel format XR24
size 1536000 pitch 3200 offset 268435456
size 1536000 pitch 3200 offset 269971456
DRM subsystem and buffer mapped successfully
error: drmModeAtomicCommit failed: Permission denied
error: Flush fail
DRM_ROCKCHIP [=y]
Permissions:
ls -l /dev/dri/
total 0
drwxr-xr-x 2 root root 80 Jan 24 07:22 by-path
crw-rw-rw- 1 root video 226, 0 Jan 24 07:22 card0
crw-rw-rw- 1 root video 226, 128 Jan 24 07:22 renderD128
I add for lvgl
Code: Select all
# define USE_DRM 1
lv_init();
/*Linux FrameBuffer or DRM device init*/
#if (USE_DRM == 1)
drm_init();
#elif (USE_FBDEV == 1)
fbdev_init();
#endif
static lv_disp_draw_buf_t disp_buf;
lv_disp_draw_buf_init(&disp_buf, buf0, buf1, DISP_SIZE);
static lv_disp_drv_t disp_drv;
lv_disp_drv_init(&disp_drv);
disp_drv.draw_buf = &disp_buf;
#if (USE_DRM == 1)
disp_drv.flush_cb = drm_flush;
#elif (USE_FBDEV == 1)
disp_drv.flush_cb = fbdev_flush;
#endif
...