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dp: rx: Added function to wait for the PHY to be ready.

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Signed-off-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>
This commit is contained in:
Andrei-Liviu Simion 2015-01-15 15:54:55 -08:00 • committed by Nava kishore Manne
parent bd16c255da
commit 5d03fa54da
1 changed files with 40 additions and 0 deletions
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40
XilinxProcessorIPLib/drivers/dp/src/xdprx.c
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@ -55,6 +55,11 @@
#include "microblaze_sleep.h"
#endif
/**************************** Function Prototypes *****************************/
/* Miscellaneous functions. */
static u32 XDprx_WaitPhyReady(XDprx *InstancePtr, u8 Mask);
/**************************** Function Definitions ****************************/
/******************************************************************************/
@ -185,3 +190,38 @@ void XDprx_WaitUs(XDprx *InstancePtr, u32 MicroSeconds)
usleep(MicroSeconds);
#endif
}
/******************************************************************************/
/**
* This function waits for the DisplayPort PHY to come out of reset.
*
* @param InstancePtr is a pointer to the XDprx instance.
* @param Mask specifies which bits to wait for the PHY to be ready on.
*
* @return
* - XST_ERROR_COUNT_MAX if the PHY failed to be ready.
* - XST_SUCCESS otherwise.
*
* @note None.
*
*******************************************************************************/
static u32 XDprx_WaitPhyReady(XDprx *InstancePtr, u8 Mask)
{
u32 Timeout = 100;
u32 PhyStatus;
/* Wait until the PHY is ready. */
do {
PhyStatus = XDprx_ReadReg(InstancePtr->Config.BaseAddr,
XDPRX_PHY_STATUS) & Mask;
/* Protect against an infinite loop. */
if (!Timeout--) {
return XST_ERROR_COUNT_MAX;
}
XDprx_WaitUs(InstancePtr, 20);
}
while (PhyStatus != Mask);
return XST_SUCCESS;
}