Regarding tvp5147 capture through omx in DM8168

Amritpreet Singh93

Other Parts Discussed in Thread: TVP5147

Hi All

We are working on a custom board based on DM8168. We are using EZSDK(ti-ezsdk_dm816x-evm_5_05_02_00).

We have connected TVP5147 on VIP1 of DM8168 and configured it in 20bit 4:2:2 discrete sync mode. After enabling the decoder we are getting:

Dataclock = 13.5MHz

HSYNC = 15.625 KHz

VSYNC = 25

We have probed these things.

But when we are trying to capture video from the video port, the pipeline is getting stuck somewhere:

gst-launch omx_camera input-mode=16_BIT input-interface=VIP2_PORTA output-buffers=10 ! 'video/x-raw-yuv,width=720,height=288,framerate=60/1' ! gstperf ! omx_scaler ! omx_ctrl display-mode=OMX_DC_MODE_1080P_60 ! gstperf ! omx_videosink sync=false

Please guide me how else can i check whether data is being captured or not. Or whether there is some problem in pipeline itself?

We would like to use OMX only to capture the video.

Warm Regards

Amritpreet

over 9 years ago

0 Margarita Gashova over 9 years ago

TI__Guru* 80190 points

Hello,

In the default EZSDK there is no gstreamer element omx_camera.

We does not support the tvp5147. But this external decoder could be add by following this user guide:

In the default EZSDK we are using v4l2src capture element.

I would recommend you few things:

-add the external decoder tvp5147. It is already available as a part of Linux kernel under $Kernel/driver/media/tvp514x.c. You just need to hook this up to V4L2 capture driver.

-verify that it is working by using saLoopBack demo in EZSDK. The load-hd-v4l2-firmware.sh shall be load.

-try with gstreamer after that. If you want to obtain the gstreamer debug prints you could add --gst-debug=3. If you need to check the fps, arm load you could add the gstperf element in the gstreamer pipeline.

BR
Margarita

0 Amritpreet Singh93 over 9 years ago in reply to Margarita Gashova

Expert 1285 points

Hi Margarita
How can i dump the registers of VIN1 and verify whether i am getting some data at video port or not?

0 Margarita Gashova over 9 years ago in reply to Amritpreet Singh93

TI__Guru* 80190 points

Hello,

You could check this thread:
e2e.ti.com/.../165987

BR
Margarita

0 Amritpreet Singh93 over 9 years ago in reply to Margarita Gashova

Expert 1285 points

HI
I Saw that post. But the tool is missing. I want to dump 256 registers just like in that post

0 Amritpreet Singh93 over 9 years ago in reply to Amritpreet Singh93

Expert 1285 points

Hi Margarita

We have experienced some weird behavior. We did the pin-multiplexing for VIN1 in kernel.

And i correctly enabled the HSYNC and VSYNC pins for Port A of VIP1 through following lines:

TI816X_MUX(TSI4_DATA, OMAP_MUX_MODE2),//hsync0

TI816X_MUX(TSI4_BYTSTRT, OMAP_MUX_MODE2),//vsync0

But when i am trying to read the pin-mux registers through mum_util utility, we are getting the different values:

root@dm816x-evm:~# mem_util 0x48140854

root@dm816x-evm:~#mem_util 0x48140858

I got the register addresses from datasheet. Can you suggest where can be the problem?

0 Amritpreet Singh93 over 9 years ago in reply to Amritpreet Singh93

Expert 1285 points

Hi Margarita
I got the file which was over-riding my pin settings. Its
board-support/linux-2.6.37-psp04.04.00.01/arch/arm/mach-omap2/devices.c

But still haven't been able to get the video.

0 Margarita Gashova over 9 years ago in reply to Amritpreet Singh93

TI__Guru* 80190 points

Hello,

You could try to verify the adding of tvp5147 external decoder on the EVM is it working and compare the EVM with the custom board.
You could check this guide about pinmux settings :
processors.wiki.ti.com/.../TI81XX_PSP_User_Guide

BR
Margarita

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Regarding tvp5147 capture through omx in DM8168