I use the drmWaitVBlank to display. But I found that vblank wiil be late for a frame. I want to know if there is a register to let the notice earlier？I find the other soc has the register to let the interrupt to be earlier, similarly, earlier for 20 lines.
This looks advancing and we may not have the interface for your request. For general use-cases such as rendering in 60 fps or 30 fps, it should run well. You may be developing an advancing use-case. Please share more information about the use-case and why the function is required. We may check and evaluate it for future releases.
HA! I see.
Because I want to display the frame as quickly as it can. I find that if I
drmWaitVBlank to display the soc will display in the next generation. If i
drmModePageFlip(drm_fd, drm_crtc_id, ,DRM_MODE_PAGE_FLIP_EVENT|DRM_MODE_PAGE_FLIP_ASYNC,this); It can diplay one frame earlier. So I want to the soc notify to me earlier. As I know, the other soc has the register to let the interrupt to be earlier, similarly, earlier for 20 lines.
My project is sensitive for the speed. I need very real-time.
@DaneLLL any suggestions?
This is more like a feature request and we don’t have plan to include new features into Jetpack 4 release. We may not be able to have further enhancement on it. Please note this.
It’s not a new feature, it’s just the hardware register. Does the soc have the register or not?
We don’t have the interface for the use-case.
I’m sorry to hear that. I hope it will be supported later ^_^
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