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dptx: MST: Optimized I2C and AUX read.

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ReadData is now filled only with actually data instead of sideband message reply
data (reply code, port number, etc) + data.

Signed-off-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>
This commit is contained in:
Andrei-Liviu Simion 2014-08-10 20:07:53 -07:00 • committed by Jagannadha Sutradharudu Teki
parent 1efc76acc9
commit c45033d802
1 changed files with 24 additions and 16 deletions
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40
XilinxProcessorIPLib/drivers/dptx/src/xdptx_mst.c
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@ -718,7 +718,7 @@ void XDptx_GetGuid(XDptx *InstancePtr, u8 LinkCountTotal, u8 *RelativeAddress,
u32 *Guid)
{
u8 Index;
u8 Data[30];
u8 Data[16];
/* Verify arguments. */
Xil_AssertVoid(InstancePtr != NULL);
@ -729,22 +729,16 @@ void XDptx_GetGuid(XDptx *InstancePtr, u8 LinkCountTotal, u8 *RelativeAddress,
if (LinkCountTotal == 1) {
XDptx_AuxRead(InstancePtr, XDPTX_DPCD_GUID, 16, Data);
memset(Guid, 0, 16);
for (Index = 0; Index < 16; Index++) {
Guid[Index / 4] <<= 8;
Guid[Index / 4] |= Data[Index];
}
}
else {
XDptx_SendSbMsgRemoteDpcdRead(InstancePtr, LinkCountTotal,
RelativeAddress, XDPTX_DPCD_GUID, 16, Data);
}
memset(Guid, 0, 16);
for (Index = 0; Index < 16; Index++) {
Guid[Index / 4] <<= 8;
Guid[Index / 4] |= Data[Index + 3];
}
memset(Guid, 0, 16);
for (Index = 0; Index < 16; Index++) {
Guid[Index / 4] <<= 8;
Guid[Index / 4] |= Data[Index];
}
}
@ -1137,6 +1131,8 @@ u32 XDptx_SendSbMsgRemoteDpcdWrite(XDptx *InstancePtr, u8 LinkCountTotal,
* - XST_DEVICE_NOT_FOUND if no RX device is connected.
* - XST_ERROR_COUNT_MAX if either waiting for a reply, or an AUX
* request timed out.
* - XST_DATA_LOST if the requested number of BytesToRead does not
* equal that actually received.
* - XST_FAILURE otherwise - if an AUX read or write transaction
* failed, the header or body CRC of the sideband message did not
* match the calculated value, or the a reply was negative
@ -1202,8 +1198,13 @@ u32 XDptx_SendSbMsgRemoteDpcdRead(XDptx *InstancePtr, u8 LinkCountTotal,
}
/* Collect body data into an array. */
for (Index = 0; Index < SbMsgReply.Length; Index++) {
ReadData[Index] = SbMsgReply.Data[Index];
for (Index = 3; Index < SbMsgReply.Length; Index++) {
ReadData[Index - 3] = SbMsgReply.Data[Index];
}
/* The number of bytes actually read does not match that requested. */
if (Index < BytesToRead) {
return XST_DATA_LOST;
}
return XST_SUCCESS;
@ -1230,6 +1231,8 @@ u32 XDptx_SendSbMsgRemoteDpcdRead(XDptx *InstancePtr, u8 LinkCountTotal,
* - XST_DEVICE_NOT_FOUND if no RX device is connected.
* - XST_ERROR_COUNT_MAX if either waiting for a reply, or an AUX
* request timed out.
* - XST_DATA_LOST if the requested number of BytesToRead does not
* equal that actually received.
* - XST_FAILURE otherwise - if an AUX read or write transaction
* failed, the header or body CRC of the sideband message did not
* match the calculated value, or the a reply was negative
@ -1298,8 +1301,13 @@ u32 XDptx_SendSbMsgRemoteIicRead(XDptx *InstancePtr, u8 LinkCountTotal,
}
/* Collect body data into an array. */
for (Index = 0; Index < SbMsgReply.Length; Index++) {
ReadData[Index] = SbMsgReply.Data[Index];
for (Index = 3; Index < SbMsgReply.Length; Index++) {
ReadData[Index - 3] = SbMsgReply.Data[Index];
}
/* The number of bytes actually read does not match that requested. */
if (Index < BytesToRead) {
return XST_DATA_LOST;
}
return Status;