AIF2 SERDES Re FRAMESYCN Issue

Hello,

Since this is in the RX, can you try forcing the Serdes RX to low and then enabling it again to see if it helps?

Pseudo Code:

1. If fsync error detected, Force serdes signal detect Low. 

2. Force serdes signal detect high. 

3. Check fsync again.

Here are the APIs for the Serdes Signal Detect. 

CSL_IDEF_INLINE void CSL_Serdes_Force_Signal_Detect_Low(uint32_t base_addr,
uint32_t num_lanes,
uint8_t lane_mask)
{
uint32_t lane_num;

/* Force SERDES Signal Detect LO (Reset CDR, Att and Boost) */
for(lane_num=0; lane_num<num_lanes; lane_num++)
{
if ((lane_mask & (1<<lane_num))!=0)
{
CSL_FINSR(*(volatile uint32_t *)(base_addr + 0x200*(lane_num+1) + 0x04),2,1, 0x2);
}
}
}

CSL_IDEF_INLINE void CSL_Serdes_Force_Signal_Detect_Enable(uint32_t base_addr,
uint32_t lane_num)
{
CSL_FINSR(*(volatile uint32_t *)(base_addr + 0x200*(lane_num+1) + 0x04),2,1,0);
}

Hi,

Thanks for your help. But it did not work. I am still getting 0x00000308 value from SD Rx status register for the down link.
When I follow below serdes reset functions. It comes back to sync state again:

CSL_AIF2SerdesShutdown(CSL_AIF2_SERDES_B8_CFG_REGS);
if (!CSL_AIF2SerdesIsReset(CSL_AIF2_SERDES_B8_CFG_REGS)) {
AIF_serdesRestoreDefault(CSL_AIF2_SERDES_B8_CFG_REGS);
}

However, this turns down all links in B8 macro for a short time, is there any way to apply these functions to specific link only so that other links ll not be affected by the action?

Note: Other functions in SerdesReset are already line-specific.

Thanks,
Mustafa

Hello,

If serdes restore default is the only way that the recovery is happening, then all the lanes will be impacted. There is a common lane (comlane) which is tied to all the lanes in a macro and when it is restored, it will impact all lanes. So unfortunately restoring a single lane is not possible. 

Regards,

Arun