How to I draw two or more video frame buffer on the same drm/kms plane component without flicker

CC H

Prodigy 120 points

Dear Sir,

I got my AM572x EVM from TI website running Processor SDK 2.0,

I tried to draw two video frame on the same plane id by calling drmModeSetPlane(...) twice.

But there is flicker on the display output. Following is example code. How could I fix this problem ?

for example :

drmModeSetCrtc();

while(1) {

drmModeSetPlane(plane1, fb);

drmModeSetPlane(plane1, fb2);

}

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

I will forward this to the software team, but feedback will be delayed due to the holidays.

0 Manisha Agrawal over 9 years ago in reply to Biser Gatchev-XID

TI__Mastermind 22946 points

Not sure how you are configuring and using the drm APIs. You can refer to the dual camera demo example written for AM437x device. Look at loopback.c file in bleow git repo for the usage of drm APIs.

http://git.ti.com/sitara-linux/dual-camera-demo/trees/drm

0 CC H over 9 years ago in reply to Manisha Agrawal

Prodigy 120 points

Dear manisha,

Thanks for your reply.

Following picture is my use purpose, there are six HDMI HD input source.

How to overlay (side-by-side, PIP) multiple video frame buffer on VID1 and get hardware support ?

Or there is any other method to overlay (side-by-side, PIP) multiple video frame buffer and get hardware support.

I had tried DRM/KMS API to use drm Plane on CRTC, but there is not enough Plane to use.

0 CC H over 9 years ago in reply to CC H

Prodigy 120 points

Dear Sir,

Do you have any idea about my use purpose ?

0 Manisha Agrawal over 9 years ago in reply to CC H

TI__Mastermind 22946 points

SGX544 3D graphics accelerator can be used to achieve to scale and overlaying of your use case. We do not have example application available today on how this can be acheived. You can refer to gstreamer plugin waylandsink example on how to attach NV12 buffer to scaler and waylandscaler example for scaling using wayland scaling APIs.

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How to I draw two or more video frame buffer on the same drm/kms plane component without flicker