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dp: tx: Training should fail if clock recovery fails on max voltage.

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As required by DisplayPort compliance, the clock recovery sequence should
fail if all lanes haven't completed clock recovery on the first attempt
using the maximum voltage swing supported.

Signed-off-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>
This commit is contained in:
Andrei-Liviu Simion 2015-02-09 15:42:42 -07:00 • committed by Nava kishore Manne
parent 78cccda094
commit 332ba9d225
1 changed files with 5 additions and 0 deletions
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5
XilinxProcessorIPLib/drivers/dp/src/xdp.c
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@ -2092,6 +2092,11 @@ static XDp_TxTrainingState XDp_TxTrainingStateClockRecovery(XDp *InstancePtr)
break;
}
/* Only try maximum voltage swing once. */
if (LinkConfig->VsLevel == XDP_TX_MAXIMUM_VS_LEVEL) {
break;
}
/* Adjust the drive settings as requested by the RX device. */
Status = XDp_TxAdjVswingPreemp(InstancePtr);
if (Status != XST_SUCCESS) {