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dp: tx: Don't write voltage swing and pre-emphasis values when writing TP0.

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For compliance, training pattern 0 should be written without using a burst write
for voltage swing and pre-emphasis values.

Signed-off-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>
This commit is contained in:
Andrei-Liviu Simion 2015-01-26 12:57:37 -08:00 • committed by Nava kishore Manne
parent a36b777a40
commit 57a0c64dd0
1 changed files with 10 additions and 4 deletions
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14
XilinxProcessorIPLib/drivers/dp/src/xdp.c
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@ -2714,10 +2714,16 @@ static u32 XDp_TxSetTrainingPattern(XDp *InstancePtr, u32 Pattern)
/* Make the adjustments to both the DisplayPort TX core and the RX
* device. */
XDp_TxSetVswingPreemp(InstancePtr, &AuxData[1]);
/* Write the voltage swing and pre-emphasis levels for each lane to the
* RX device. */
Status = XDp_TxAuxWrite(InstancePtr, XDP_DPCD_TP_SET,
5, AuxData);
if (Pattern == XDP_TX_TRAINING_PATTERN_SET_OFF) {
Status = XDp_TxAuxWrite(InstancePtr, XDP_DPCD_TP_SET, 1,
AuxData);
}
else {
/* Write the voltage swing and pre-emphasis levels for each lane
* to the RX device. */
Status = XDp_TxAuxWrite(InstancePtr, XDP_DPCD_TP_SET, 5,
AuxData);
}
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}