RTOS/TDA2P-ACD: LCD timing parameters

Stefan Koncar

Part Number: TDA2P-ACD

Tool/software: TI-RTOS

Hi,

I would like to setup LCD on TDA2p to 1920x1080@30 fps. Can you send me required timing parameters for this configuration?

Is there anything else that I should change in order to get 1920x1080@30 fps (RGB888) except following:

pVInfo->mInfo.pixelClock = 78000U;
pVInfo->mInfo.fps = 32U;
pVInfo->mInfo.hBackPorch = 32U;
pVInfo->mInfo.hSyncLen = 16U;
pVInfo->mInfo.hFrontPorch = 112U;
pVInfo->mInfo.vBackPorch = 16U;
pVInfo->mInfo.vSyncLen = 2U;
pVInfo->mInfo.vFrontPorch = 17U;

This parameteres are for 1920x1200, can you send me same for 1920x1080.

Best Regards,

Stefan.

over 6 years ago

0 Rishabh Garg over 6 years ago

TI__Guru 55685 points

Hi Stefan,

You should refer to gDssStdModeInfo structure in PROCESSOR_SDK_VISION_03_06_00_00\ti_components\drivers\pdk_01_10_02_07\packages\ti\drv\vps\src\vpslib\hal\src\vpshal_dssDispcOvlyTda3xx.c.

Regards,
Rishabh

0 Brijesh Jadav over 6 years ago

TI__Guru**** 475565 points

Stefan,

It really depends on the display that you are using.
But typically 1080p@30fps timings are as shown below.

pVInfo->mInfo.pixelClock = 74250U;
pVInfo->mInfo.fps = 30U;
pVInfo->mInfo.hBackPorch = 88U;
pVInfo->mInfo.hSyncLen = 44U;
pVInfo->mInfo.hFrontPorch = 148U;
pVInfo->mInfo.vFrontPorch = 4U;
pVInfo->mInfo.vSyncLen = 5U;
pVInfo->mInfo.vBackPorch = 36U;

Rgds,
Brijesh

0 Stefan Koncar over 6 years ago in reply to Brijesh Jadav

Genius 3050 points

Hi,

For most of these parameters real value will be programmed value - 1. So, should I all values increment for 1?

For example:

width = 1921
height = 1081

Best Regards,

Stefan.

0 Rishabh Garg over 6 years ago in reply to Stefan Koncar

TI__Guru 55685 points

Hi Stefan,

You need to program 1919. You can see APIs VpsHal_dssOvlyLcdSetTiming and VpsHal_dssOvlyLcdSetBlankTiming for values programmed in HW.

Regards,
Rishabh

0 Brijesh Jadav over 6 years ago in reply to Stefan Koncar

TI__Guru**** 475565 points

hi Stefan,

That will be taken care by driver. We need provide exact values.

Rgds,
Brijesh

0 Rishabh Garg over 6 years ago

TI__Guru 55685 points

Hi Stefan,

Were you able to get this working?

Regards,
Rishabh

0 Rishabh Garg over 6 years ago in reply to Rishabh Garg

TI__Guru 55685 points

Hi,

I haven't heard back from you, I'm assuming you were able to resolve your issue.
If not, just post a reply below (or create a new thread if the thread has locked due to time-out).

Regards,
Rishabh

0 Stefan Koncar over 6 years ago in reply to Rishabh Garg

Genius 3050 points

Hi Rishabh/Brijesh,

Sorry for delay. Yes, I managed to make it work. In fact, I don't use real LCD display device - LCD pins on TDA2p are connected to Parallel-to-CSI converter. PAR2CSI is connected to UB953 and video is sent over FPD link.

Thank you on your help.

Also, I have one more question about this topic, but I will close this thread and open new one.

New thread link: https://e2e.ti.com/support/processors/f/791/t/764627

Best Regards,

Stefan.

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RTOS/TDA2P-ACD: LCD timing parameters