TDA2PXEVM: How to enable SIMCOP LDC in HLOS Usecase?

HJ Kim

Part Number: TDA2PXEVM

Hi,

I've tried to enable LDC by modifying current hlos usecase (iss_capture_isp_display) but it doesn't work.

■ There're not hlos LDC usecase in current vision sdk (vision_sdk/apps/src/hlos/adas/src/usecase)
- hlos usecase 'iss_capture_isp_display' is only using ISSM2MSIMCOP_LINK_OPMODE_VTNF, it didn't work by just changing it to ISSM2MSIMCOP_LINK_OPMODE_LDC
- there's another usecase 'iss_multi_cam_isp_sgx_3d_srv_display/iss_capture_isp_simcop_display' but it is for rtos not hlos (same code with rtos usecase)

How to enable LDC in hlos usecase and what parameters are necessary?

Thanks.

over 7 years ago

0 Brijesh Jadav over 7 years ago

TI__Guru**** 478015 points

Hi Kim,

Well, it can be enabled, but it is supported on M4 side. You need to change current LDC Lut to make it working. This LDC table is also on the M4 side.

Regards,

Brijesh

0 HJ Kim over 7 years ago in reply to Brijesh Jadav

Expert 1460 points

Hi Brijesh,

I understand that simcop is controlled by IPU M4 and its LUT is also at M4 side.

My question is that it is possible to use simcop LDC in current hlos link model? Are additional interfaces necessary?

It seems some other parameters of simcop should be setup to use LDC and it is not supported in current hlos link model. It's hard to analyze simcop LDC registers, and vision sdk is too complicated to trace control scheme.

Thanks

0 Brijesh Jadav over 7 years ago in reply to HJ Kim

TI__Guru**** 478015 points

Hi Kim,

Yes, Simcop is already part of the single channel iss usecase on hlos. It is just enabled for noise filter mode, but it can be enabled for the LDC also. The only thing is, all the parameters are configured on the M4 side. So if you want to change LDC LUT or any other parameter, it should be done on M4.
Please have a look at the IssUtils_InitSimcopConfig API in vision_sdk\apps\src\rtos\iss\src\common\iss_utils.c file. This API configurs LDC parameters.

Rgds,
Brijesh

0 HJ Kim over 7 years ago in reply to Brijesh Jadav

Expert 1460 points

Hi Brijesh,

Thanks a lot for your reply.

ok, I got the iss_utils.c file.
Are there no ways to enable LDC in current hlos side? Should I modify M4 FW for it?

Thanks.

0 Brijesh Jadav over 7 years ago in reply to HJ Kim

TI__Guru**** 478015 points

Hi Kim,

No, it is not possible to update LDC config from hlos.

Regards,
Brijesh

0 HJ Kim over 7 years ago in reply to Brijesh Jadav

Expert 1460 points

Hi Brijesh,

ok, I got it.

Current rtos usecase in vision sdk can support LDC?
There're some codes which touch LDC flag in rtos usecase, but I'm not sure it really works.

Thanks.

0 Brijesh Jadav over 7 years ago in reply to HJ Kim

TI__Guru**** 478015 points

Yes, rtos usecases support LDC. There are some flags to enable/bypass LDC. Even it can be enabled/bypassed at runtime while usecase is running for single channel usecase.

Rgds,
Brijesh

0 HJ Kim over 7 years ago in reply to Brijesh Jadav

Expert 1460 points

ok, I appreciate your perfect answer!

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TDA2PXEVM: How to enable SIMCOP LDC in HLOS Usecase?