PROCESSOR-SDK-DRA7X: PROCESSOR-SDK-DRA7X: Display Flicker Part 4

Raghu Kadari

Expert 1380 points

Part Number: PROCESSOR-SDK-DRA7X

Hi Team,

ISSUE: DISPLAY FLICKER OBSERVED

Previous Reference

Ticket: https://e2e.ti.com/support/processors/f/791/t/889397

Usecase:

Path: vision_sdk/apps/src/rtos/usecases/weston_dualcamera_dsswb

UseCase: weston_dualcamera_dsswb

Capture -> Display_Video
Capture_1 -> Display_Video1
DispDistSrc_gfx -> Display_gfx
DispDistSrc_vid3 -> Display_vid3
Capture_dsswb -> Alg_SwCrc

Background: Previously we have observed DisplayFlicker in HU, but after switching to HDMI clock, we

did not observe this issue. (Switching to HDMI clock- Please see Reference Ticket).

Current Situation: On Bootup we see HU is flickering and recovering after a short while. Issue is

seen randomly and it is not always issue.

Already Verified Below in the Last Debugging session:

1. There is no Sync Loss verified

2. Setting DSS high priority still we are seeing issue.

Best Regards,

Raghu Kadari

0 Brijesh Jadav over 4 years ago

Raghu,

What kind of flickering are you seeing? If there is no underflow, sync lost and clock is also stable, it is most likely not coming from DSS.

Can you please sure to setup the clock and then enable the VENC?

Regards,

Brijesh

0 Raghu Kadari over 4 years ago in reply to Brijesh Jadav

Expert 1380 points

Hi Brijesh,

Flicker Video is sent offline.

In our setup first Clock is set and then Vence is set.

Note: In 7 Inch variant we dont see flicker, we only see flicker in 12 inch Variant both use same init sequence

Best Regards,

Raghu K

0 Raghu Kadari over 4 years ago in reply to Raghu Kadari

Expert 1380 points

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