How to hook tvp514x.ko module up to v4l2 driver

Max Ekimov

Other Parts Discussed in Thread: TLC59108, TVP7002, TVP5147

Hello, Dear experts!

I tru to capture video from composite input(J11)!

I know, that I need add module tvp514x.ko in kernel and to use v4l2 driver.

So I reconfigured via menuconfig and rebuild kernel.
Then I added new line "modprobe tvp514x" in load-hd-v4l2-firmware.sh.

When I run this script and exec "lsmod" I get following:

Module                  Size Used by
tlc59108                1545 0
ti81xxhdmi             17685 0
ti81xxvin              20591 0
tvp7002                 6429 1
tvp514x                10284 0
ti81xxvo               21210 0
ti81xxfb               21979 0
vpss                   74936 4 ti81xxhdmi,ti81xxvin,ti81xxvo,ti81xxfb
syslink              1133911 0
ipv6                  214095 14

As we can see "tvp514x" is loaded!

But if I run "dmesg | grep tvp" we can see only:

tvp7002 3-005d: tvp7002 found @ 0x5d (OMAP I2C adapter)
tvp7002 3-005d: Rev. 02 detected.
ti81xxvin ti81xxvin: registered sub device tvp7002

So tvp5147m on my board is not detected!

What is wrong?

Thanks!

over 11 years ago

0 Margarita Gashova over 11 years ago

TI__Guru* 80190 points

Hello,

You should follow this user guide as well.

http://processors.wiki.ti.com/index.php/DM81xx_AM38xx_Adding_External_Decoders_to_V4L2_Capture_Driver

Best Regards,

Margarita

0 Max Ekimov over 11 years ago in reply to Margarita Gashova

Intellectual 480 points

Hi!

Sorry for my late answer!

Unfortunately, I'm not expert in tvp 5147 and I don't know what settings to use!

Could you get me a working patch for kernel!?

Best Regards, Max

0 Brijesh Jadav over 11 years ago in reply to Max Ekimov

TI__Guru**** 478375 points

Hi Max,

TVP514x driver present in the Linux Kernel is very well tested on multiple platforms, so you just need to connect to the master driver and call appropriate API, it should work.

Regards,

Brijesh

0 Max Ekimov over 11 years ago in reply to Brijesh Jadav

Intellectual 480 points

Hi Brijesh!

Thank you for reply!

I'm sorry, but I have several questions:

If I execute "dmesg | grep tvp" I can see only:

1)
tvp7002 3-005d: tvp7002 found @ 0x5d (OMAP I2C adapter)
tvp7002 3-005d: Rev. 02 detected.
ti81xxvin ti81xxvin: registered sub device tvp7002

I don't see something about tvp5147!
tvp5147 is not detected! Why?

How can I correct this?

2)
You write - "you just need to connect to the master driver"

What does it mean? Could you sketch in a few details of what you're suggesting?

3)
If I run "ls /dev/video*" I get:

/dev/video0 /dev/video2 /dev/video4 /dev/video6
/dev/video1 /dev/video3 /dev/video5

How can I know which node maps tvp5147(composite input)?

Best regards, Max

0 Margarita Gashova over 11 years ago in reply to Max Ekimov

TI__Guru* 80190 points

Hello,

Have you build this in the kernel?

Device Drivers -> Multimedia support -> Video capture adapters -> Encoders/decoders and other helper chips -> Texas Instruments TVP514x video decoder

http://processors.wiki.ti.com/index.php/DM81xx_AM38xx_Adding_External_Decoders_to_V4L2_Capture_Driver

Best Regards,

Margarita

0 Brijesh Jadav over 11 years ago in reply to Max Ekimov

TI__Guru**** 478375 points

Hi,

Can you do lsmod on the console and see if it shows tvp514x module?

Rgds,

Brijesh

0 Max Ekimov over 11 years ago in reply to Brijesh Jadav

Intellectual 480 points

Hello,

I've wrote about lsmod in my first post above!

Please, read again!

BR, Max

0 Prabhakar Lad over 11 years ago

Guru 11260 points

Hi,

As we can see "tvp514x" is loaded!

But if I run "dmesg | grep tvp" we can see only:

tvp7002 3-005d: tvp7002 found @ 0x5d (OMAP I2C adapter)
tvp7002 3-005d: Rev. 02 detected.
ti81xxvin ti81xxvin: registered sub device tvp7002

So tvp5147m on my board is not detected!

If lsmod is listing tvp514x it means the module is loaded. And the messages which you are getting from tvp7002 driver is from the printk() statements from probe function so it might just happen that the tvp514x driver might not have the printk() statements in the probe so just to reconfirm what you can do is add some printk's in probe of tvp514x driver to make you feel happy recompile it and finally load it eventually you should get the printk() messages.

Thanks,

--Prabhakar Lad

0 Brijesh Jadav over 11 years ago in reply to Prabhakar Lad

TI__Guru**** 478375 points

Hi,

Are you following the app note from below location?

http://processors.wiki.ti.com/index.php/DM81xx_AM38xx_Adding_External_Decoders_to_V4L2_Capture_Driver

Regards,

Brijesh

0 David Soto - RidgeRun over 11 years ago in reply to Brijesh Jadav

Genius 3700 points

Hi,

Just in case you need to capture composite using the DM8168-EVM we got the TVP5147 working with V4L2, you can find more info here:

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/326172/1170437.aspx#1170437

-David

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How to hook tvp514x.ko module up to v4l2 driver