PROCESSOR-SDK-AM62A: How to create a graphic layer for display ?

Hello Eten,

Could you please share the example that was used on the TDA2 platform? On AM62A, we do not have a graphics layer as an input to the DSS. We have two input pipelines and DSS has the following properties that it can support with two pipelines: https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/09_00_00_03/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/Display/DSS7.html#tidss-properties 

Regards,
Krunal

Hi Krunal,

In TDA4 SDK, the graphic initialization source code is in located in "vision_apps/utils/grpx/src/app_grpx.c".

How can I perform the same function in AM62A by gstreamer?

Regards,
Eten

Hi Eten,

I am not sure I understand the request. There is no graphics core on AM62A so the above feature would not port.

Regards,
Krunal

Hi Krunal,

Based on your mentioned URL,

https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/09_00_00_03/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/Display/DSS7.html#tidss-properties

I guess that the graphic layer should be the "plane" object (connector ID 31 & 40).

The following image is the HDMI output screen after executing"modetest -M tidss -P 40@37:1920x1080 -w 40:zpos:1 -w 40:alpha:32768".

When using plane#31,  the color will be filled on screen without alpha blending.

We want to draw something on the plane#40 by ARGB888 and let it display asynchronously to overlap the screen (CRTCs).

So how to set the system and to construct the corresponding gstream pipeline string.

Regards,
Eten

Hi Eten,

You can do something like this: gst-launch-1.0 videotestsrc ! video/x-raw,width=1920,height=1080 ! kmssink driver-name=tidss plane-properties="prop,zpos=1"

Regards,
Krunal

Hi Krunal,

Do I need to assign plane number ? How to set the global alpha blending value?

Thank you !!

Regards,
Eten

Hi Eten,

You need to do gst-inspect-1.0 kmssink or waylandsink to see if those properties are exposed.

Regards,
Krunal