AM5728: AM5728. how shared same memory between GC320 and omap_bo (DRM)?

DeVdistress

Part Number: AM5728

Hello TI, I am using the Linux Processor SDK for AM57x v05.02.00.10.

I studied the information from http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Examples_and_Demos/Application_Demos/Video_Graphics_Test.html

I have successfully built and run the video-graphics-test from https://git.ti.com/cgit/sitara-linux/video-graphics-test/

I studied the sources from https://git.ti.com/cgit/graphics/ti-gc320-test/?h=ti-5.0.11.p7

I have a task of working with video captured in memory allocated using omap_bo (DRM). This video needs to be mirrored using GC320. All of the examples above use CMEM.

Is it possible to use the memory allocated by omap_bo for GC320?

Сan you advise some examples or samples (omap_bo and GC320 works through shared memory)?

Now i am getting the following error:

gcoSURF_SetBuffer don't have error, but, gcoSURF_SetWindow of next coding have error.

status = gcoSURF_SetBuffer(
                            lpSurface->Surface,
                            gcvSURF_BITMAP,
                            format,
                            stride,
                            vaddr,
                            phys
                          );

status = gcoSURF_SetWindow(lpSurface->Surface, 0, 0, width, height);

ERROR:src/svl/src/gc320_omap.cpp configureSurface:337: Failed: gcvSTATUS_OUT_OF_RESOURCES

The source code is simplified. If you need the complete code, please write about it.

over 5 years ago

0 DeVdistress over 5 years ago

Intellectual 635 points

// `omap_bo` might not have backing pages at this point, make sure you got
// them by writing into it.
// This is very important.
// Without it don't work ( gcoSURF_SetWindow was error Failed: gcvSTATUS_OUT_OF_RESOURCES )
std::memset(vaddr, 0, size);

After memset everything was fine. Don't close the topic just yet. There may be more questions.

Сan you advise some examples or samples (omap_bo and GC320 works through shared memory)?

0 DeVdistress over 5 years ago in reply to DeVdistress

Intellectual 635 points

I have a new question.

I use the nv12 multiplane video.

I have two plans and two buffers. How should I use gcoSURF_SetBuffer with nv12?

When I have yuyv, the gcoSURF_SetBuffer works fine because only one omap_bo buffer is passed.

TI please help me, I await you response

0 Karthik Ramanan over 4 years ago in reply to DeVdistress

TI__Guru** 113810 points

Hi Oleg,

We missed responding to this question here, and it seems like you have something working.

Just wanted to check if you got further along on the above question? Please respond so that we can take it further.

Regards

Karthik

+1 DeVdistress over 4 years ago in reply to Karthik Ramanan

Intellectual 635 points

Thanks for your late reply.

The question was resolved. We decided not to work with nv12.

We work with yuyv, but with this format there is a problem with mirroring to gc320, so we convert to argb32 on vpe, and then transfer this frame to gc320.

The following documentation helped a lot:

github.com/.../iMX6.2D.API.pdf

github.com/.../gc320_manual.pdf

Here is a link to the project:

github.com/.../libsitara-video

PS: The project is outdated, I will update it soon in the next week

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AM5728: AM5728. how shared same memory between GC320 and omap_bo (DRM)?