Linux/AM5728: AM57x EVM - display rotation

Kevin Zhang0

Part Number: AM5728

Tool/software: Linux

Does the hardware of AM5728 support display rotation?

When I try to set crtc "rotation" property as 2 (90 degree rotation), the drmModeAtomicCommit API returns an error code -22.

If it does support, can I have some example code? Thanks.

over 6 years ago

0 Kevin Zhang0 over 6 years ago

Prodigy 110 points

In current dual_camera demo, the left and right is actually flipped. If you move right in front of camera, the display moves left. So the reflect-x is needed to apply as well.

0 Margarita Gashova over 6 years ago

TI__Guru* 80190 points

Hello,

Please refer the below guide:
software-dl.ti.com/.../Foundational_Components_Kernel_Drivers.html
and these threads:
e2e.ti.com/.../602770
e2e.ti.com/.../588754

Hope this helps.

BR
Margarita

0 Kevin Zhang0 over 6 years ago in reply to Margarita Gashova

Prodigy 110 points

Thanks Margarita for the answer.

May be I have to narrow down my question. After thinking I feel I don't exactly need to rotate the display.

In dual_camera demo, the CRTC resolution is 800x480, I set up my camera capture resolution as 800x480 as well. The video capture is fine.

But the problem is that the left/right directions in video is opposite to the real left/right directions. That means when I face the camera and move right, my face in video display actually moves left.

I tried to set the drm CRTC "rotation" property as 4 (reflect_x), but it returned error -22.

I want to know how to swap the left and right directions in video, not the UI widgets in wayland.

Thanks.

Regards,
Kevin

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Linux/AM5728: AM57x EVM - display rotation