TDA4VM: frame buffer compression fbdc

Ryan Stark

Expert 2930 points

Part Number: TDA4VM

Where can I find the specification for the dss fbdc? I would like to be able to encode/decode it in software.

Is there example code enabling it on dss and gpu?

What settings should I be using to get it to work with the GE8430?

I tried this setting in the gpu code

psPanelInfo[ 0 ].sSurfaceInfo.sFormat.eMemLayout = PVRSRV_SURFACE_MEMLAYOUT_FBC;
psPanelInfo[ 0 ].sSurfaceInfo.sFormat.u.sFBCLayout.eFBCompressionMode = IMG_FB_COMPRESSION_DIRECT_16x4;

and set DSS dss0_vid_fbdc_attributes = 0x219. //tiletype==2==16x4, format=0xc==u8u8u8u8 , enable=1

w = 1920, h= 1080

but the image isn't close to looking correct.

over 5 years ago

0 Brijesh Jadav over 5 years ago

TI__Guru**** 475565 points

Hi,

DSS driver does not support decompression. It supports only uncompressed data.

Rgds,

Brijesh

0 Praneeth Bajjuri over 5 years ago

TI__Expert 6176 points

Ryan,

What is the release you are trying to use? (Linux/RTOS?)

0 Ryan Stark over 5 years ago in reply to Praneeth Bajjuri

Expert 2930 points

It is our own OS. Do any of the Linux/RTOS release support fbdc?

0 Gowtham Tammana over 5 years ago in reply to Ryan Stark

TI__Expert 3430 points

Hi Ryan,

The fbdc feature is not yet supported in our current release. Is there any baseline TI release that you are using now?

Thanks,
Gowtham

0 Ryan Stark over 5 years ago in reply to Gowtham Tammana

Expert 2930 points

I can use any release you want. I mainly just want to see the patch file so I can add it to our software.

0 Gowtham Tammana over 5 years ago in reply to Ryan Stark

TI__Expert 3430 points

Hi Rya,

The support for this is planned for the upcoming RTOS SDK, and unfortunately don't have any patches that can be shared at the moment. We will reach out to you when the support is enabled.

Thanks,

Gowtham

Processors

Processors forum

TDA4VM: frame buffer compression fbdc