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dp: rx: Added function to check the link status on all lanes.

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Signed-off-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>
This commit is contained in:
Andrei-Liviu Simion 2015-01-16 10:37:13 -08:00 • committed by Nava kishore Manne
parent 0e0e170875
commit a94f816019
2 changed files with 32 additions and 0 deletions
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31
XilinxProcessorIPLib/drivers/dp/src/xdprx.c
View file

@ -189,6 +189,37 @@ u32 XDprx_InitializeRx(XDprx *InstancePtr)
return XST_SUCCESS;
}
u32 XDprx_CheckLinkStatus(XDprx *InstancePtr)
{
u8 LaneCount;
u8 LaneStatus[2];
LaneCount = XDprx_ReadReg(InstancePtr->Config.BaseAddr,
XDPRX_DPCD_LANE_COUNT_SET);
LaneStatus[0] = XDprx_ReadReg(InstancePtr->Config.BaseAddr,
XDPRX_DPCD_LANE01_STATUS);
LaneStatus[1] = XDprx_ReadReg(InstancePtr->Config.BaseAddr,
XDPRX_DPCD_LANE23_STATUS);
switch (LaneCount) {
case 4:
if (LaneStatus[1] != 0x77) {
return XST_FAILURE;
}
case 2:
if ((LaneStatus[0] & 0x70) != 0x70) {
return XST_FAILURE;
}
case 1:
if ((LaneStatus[0] & 0x07) != 0x07) {
return XST_FAILURE;
}
}
return XST_SUCCESS;
}
void XDprx_DtgEn(XDprx *InstancePtr)
{
XDprx_WriteReg(InstancePtr->Config.BaseAddr, XDPRX_SOFT_RESET, 0x01);

1
XilinxProcessorIPLib/drivers/dp/src/xdprx.h
View file

@ -91,6 +91,7 @@ void XDprx_CfgInitialize(XDprx *InstancePtr, XDp_Config *ConfigPtr,
u32 XDprx_InitializeRx(XDprx *InstancePtr);
/* xdprx.c: General usage functions. */
u32 XDprx_CheckLinkStatus(XDprx *InstancePtr);
void XDprx_DtgEn(XDprx *InstancePtr);
void XDprx_DtgDis(XDprx *InstancePtr);
void XDprx_SetLinkRate(XDprx *InstancePtr, u8 LinkRate);