TUSB1064RNQEVM: the DP signal output only 30 Hz

Hi,

I would try to increase the EQ level using by TUSB1064 it could be that link training is failing at 60Hz data rate. If 2 DP lanes is used, then source needs to support DP1.4 or HBR3. Can you confirm this is the case? Can you achieve 4K60 in 4 lane mode? 

Hi  Malik

1. Thank you for your  reply .

2. The source is support DP1.4 or HBR3.

3. According your suggestion increase the EQ level or try to 4 lane , I will  update next .

Sounds good I will await your update. 

Hello  Malik

1. When I config the tusb1064 4 lane it can output 60Hz

2. But I adjust the register  0x10 and 0x11 from 0 to 0xff，it still can't output 60Hz , when config tusb1064 2 lane.

3. I try to config 0x18 = 0x80 AUX_SNOOP_DISABLE and adjust EQ, it still can't output 60Hz , when config tusb1064 2 lane.

I believe that PD communication may be limiting the resolution here in 2 lane mode. Do you have a USB-C analyzer? 

Hello Malik1. I am using CY4500 make crypress to capture the pd negotiation.

2. attached is the 2lane and 4lane negotiation

pd log file 2LANE AND 4LANE.zip

Hi,

I am looking into this an will reply as soon as possible.

Thanks David,Malik.

one more question, there’s some dock station use dp 2lane to convert HDMI 4k6Hz how can they achieved