TDA2EVM5777: Where can I find the driver which allocates DMABUF?

user4684340

Part Number: TDA2EVM5777

Hi,

I have asked a question in another thread(see the following link). A driver which allocates DMABUF is mentioned in the answers. But I can't find this driver in version 3.0 sdk.

e2e.ti.com/.../619507

Can you gives me some information about this driver?

Mason Su

Best regards

over 6 years ago

0 Yordan Kamenov over 6 years ago

TI__Mastermind 42515 points

Hi Mason Su,

Please check if those links can help:
events.static.linuxfound.org/.../ELC17-virtmem-exp_0.pdf
git.omapzoom.org/
elinux.org/.../DMA_Buffer_Sharing-_An_Introduction.pdf

Regards,
Yordan

0 user4684340 over 6 years ago in reply to Yordan Kamenov

Intellectual 290 points

Hi Yordan,

Thanks for the quick reply.

After I saw the files, I still can’t locate the vmemexp driver.

Do you know where I can find it?

Mason su

Best regard

0 Yordan Kamenov over 6 years ago in reply to user4684340

TI__Mastermind 42515 points

Hi Mason Su,

I am not familiar with that and pinged the right expert for comment.

Regards,
Yordan

0 Nikhil Devshatwar over 6 years ago in reply to user4684340

TI__Genius 9905 points

Hello,

vmemexp driver is used to export any virtual memory (userspace, mapped memory, etc) as a DMABUF

You can find the patch for the Linux kernel at http://git.ti.com/glsdk/infoadas-kernel/commit/acdd384203333c69c7a7964ccbf8e105d1c5acbb

I hope you find this useful.

Regards,

Nikhil D

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TDA2EVM5777: Where can I find the driver which allocates DMABUF?