topic Re: glTexDirectVIV return NULL texture pointer in i.MX Processors

glTexDirectVIV return NULL texture pointer

selvakumarv — Thu, 03 Mar 2016 07:53:23 GMT

Hi,

I am using Linux kernel version 3.14.28 and corresponding OpenGL libraries.

I am calling glTexDirectVIV to get GPU memory pointer. But it fill with NULL value.

Let me know how the GPU memory pointer mapped to OpenGL texture buffer.

Regards,

Selva

Re: glTexDirectVIV return NULL texture pointer

Bio_TICFSL — Thu, 03 Mar 2016 16:34:32 GMT

Hi SELVAKUMAR,

glTexDirectVIVMap is similar to glTexDirectVIV. The only difference is that it has two inputs, “Logical” and

“Physical,” which support mapping a user space memory or a physical address into the texture surface

Output of glTexDirectVIV , If the function succeeds, it returns a pointer, or, for some YUV formats, it returns a set of pointers that directly point to the texture. The pointer(s) will be returned in the user-allocated array pointed to by the

Pixels parameter

You can find sample codes on the GPU SDK

https://www.nxp.com/webapp/Download?colCode=IMX6_GPU_SDK&location=null&Parent_nodeId=1337723891654732089522&Parent_pageType=product&Parent_nodeId=1337723891654732089522&Parent_pageType=product&Parent_nodeId=1337723891654732089522&Parent_pageType=product

and

http://imxcv.blogspot.de/2012/10/video-to-texture-streaming-part-3-imx6.html

More information, Please check your i.MX6 Graphics User guide document in your BSP documentation folder.

Regards

Re: glTexDirectVIV return NULL texture pointer

selvakumarv — Fri, 04 Mar 2016 05:48:50 GMT

Hi,

Thanks for your reply.

I am using glTexDirectVIV to get a texture pointer.

It works fine with 3.10.17 Linux kernel version.

After upgrade to 3.14.28 Linux kernel version, the glTexDirectVIV is not return the texture buffer pointer and it fill NULL.

I tried with glTexDirectVIVMap function also. Both behaves same way.

Let me know is there any additional configuration need to be done for 3.14.28

Note:

Galcore version 5.0.11.25762

Regards,

Selva