Use Case 4: Send Video Stream

Use Case 4: Send Video Stream - 3.2 English

HDMI 1.4/2.0 Transmitter Subsystem Product Guide (PG235)

Document ID

PG235

Release Date

2023-10-18

Version

3.2 English

Disable the Video PHY Controller /HDMI GT Subsystem TMDS clock for the HDMI 1.4/2.0 TX Subsystem through the API:

XVphy_Clkout1OBufTdsEnable(XVphy *InstancePtr, 
                           XVphy_DirectionType Dir,
                           u8 Enable);

Example:

XVphy_Clkout1OBufTdsEnable(VphyPtr, 
                           XVPHY_DIR_TX, 
                          (FALSE));

Set the HDMI 1.4/2.0 TX Subsystem stream parameters through the API:

u32 XV_HdmiTxSs_SetStream(XV_HdmiTxSs *InstancePtr,
                          XVidC_VideoMode VideoMode,
                          XVidC_ColorFormat ColorFormat,
                          XVidC_ColorDepth Bpc, 
                          XVidC_3DInfo *Info3D);

Example:

TmdsClock = XV_HdmiTxSs_SetStream(HdmiTxSsPtr, 
                                  VideoMode,
                                  ColorFormat, 
                                  Bpc, 
                                  NULL);

Set the Video PHY Controller /HDMI GT Subsystem TX reference clock:
```
VphyPtr->HdmiTxRefClkHz = TmdsClock; 
```

Set the HDMI TX parameter for the Video PHY Controller /HDMI GT Subsystem:

u32 XVphy_SetHdmiTxParam(XVphy *InstancePtr, 
                         u8 QuadId, 
                         XVphy_ChannelId ChId,
                         XVidC_PixelsPerClock Ppc, 
                         XVidC_ColorDepth Bpc,
                         XVidC_ColorFormat ColorFormat);

Example:

Result = XVphy_SetHdmiTxParam(VphyPtr, 
                              0, 
                              XVPHY_CHANNEL_ID_CHA,
                              HdmiTxSsVidStreamPtr->PixPerClk,
                              HdmiTxSsVidStreamPtr->ColorDepth,
                              HdmiTxSsVidStreamPtr->ColorFormatId);

Program the external clock generator to provide the Reference TMDS clocks for the Video PHY Controller /HDMI GT Subsystem.
Video PHY Controller /HDMI GT Subsystem HDMI TX Init interrupt is received.
- Callback function registered to XVPHY_HDMI_HANDLER_TXINIT Interrupt type is called.
Video PHY Controller /HDMI GT Subsystem HDMI TX Ready interrupt is received.
- Callback function registered to XVPHY_HDMI_HANDLER_TXREADY Interrupt type is called.
HDMI TX Stream UP interrupt is received.
- Callback function registered to XV_HDMITXSS_HANDLER_STREAM_UP Interrupt type is called.