[OMAP 37xx] Requirements on the stride of image buffers for SGX

GKT

Other Parts Discussed in Thread: OMAP3530

Hi,

I am trying to bring up SGX drivers on OMAP 37xx processor.

My screen resolution is 394x195.

Is there a requirement on the stride of buffer for the SGX driver to function?

Let me know if my question lacks clarity.

Thanks,

0 Prabindh Sundareson over 13 years ago

What is the framework/OS ? Yes, there is a requirement on stride.

0 GKT over 13 years ago in reply to Prabindh Sundareson

We have a custom OS.

What is the requirement on stride?

I know that for SGX core rev 1.2.1, stride needs to be a multiple of 32 pixels.

I want to know if this still applies to SGX core 1.2.5?

Thanks!

0 Prabindh Sundareson over 13 years ago in reply to GKT

Needs to be a multiple of 8 for 1.2.5.

0 GKT over 13 years ago in reply to Prabindh Sundareson

Thanks for the response!

Could you point me to some documentation that is available for SGX 1.2.5?

I did some search but didn't find it.

Where is the stride requirement mentioned for SGX 1.2.5?

0 Prabindh Sundareson over 13 years ago in reply to GKT

This information is provided to major OS vendors directly. If possible, please indicate what OS/vendor you are working with.

FWIW, this is "documented" in the below source code.

GFX_Linux_KM/services4/3rdparty/bufferclass_ti/bc_cat.c

#ifdef PLAT_TI8168
width_align = 8;
#else
width_align = cpu_is_omap3530() && ( omap_rev() < OMAP3430_REV_ES3_0 ) ? 32 : 8;
#endif

Processors forum