xdpdma.c File Reference

Overview

This file contains the implementation of the interface functions of the XDpDma driver.

Refer to xdpdma.h for detailed information.

Note

None.

MODIFICATION HISTORY:

Ver     Who   Date     Changes



1.0  aad   04/12/16 Initial release.
1.1  aad   04/26/18 Fixed Warnings

Functions
void	XDpDma_CfgInitialize (XDpDma *InstancePtr, XDpDma_Config *CfgPtr)
	This functions retrieves the configuration for this DPDMA driver and fills in the InstancePtr->Config structure. More...
int	XDpDma_SetChannelState (XDpDma *InstancePtr, XDpDma_ChannelType Channel, XDpDma_ChannelState ChannelState)
	This functions controls the states in which a channel should go into. More...
int	XDpDma_SetVideoFormat (XDpDma *InstancePtr, XAVBuf_VideoFormat Format)
	This function allocates DPDMA Video Channels depending on the number of planes in the video. More...
int	XDpDma_SetGraphicsFormat (XDpDma *InstancePtr, XAVBuf_VideoFormat Format)
	This function allocates DPDMA Graphics Channels. More...
void	XDpDma_SetQOS (XDpDma *InstancePtr, u8 QOS)
	This function starts the operation on the a given channel. More...
int	XDpDma_Trigger (XDpDma *InstancePtr, XDpDma_ChannelType Channel)
	This function Triggers DPDMA to start the transaction. More...
int	XDpDma_ReTrigger (XDpDma *InstancePtr, XDpDma_ChannelType Channel)
	This function Retriggers DPDMA to fetch data from new descriptor. More...
void	XDpDma_InitVideoDescriptor (XDpDma_Descriptor *CurrDesc, XDpDma_FrameBuffer *FrameBuffer)
	This function intializes Video Descriptor for Video and Graphics channel. More...
void	XDpDma_InitAudioDescriptor (XDpDma_AudioChannel *Channel, XDpDma_AudioBuffer *AudioBuffer)
	This function intializes Descriptors for transactions on Audio Channel. More...
void	XDpDma_DisplayVideoFrameBuffer (XDpDma *InstancePtr, XDpDma_FrameBuffer *Plane0, XDpDma_FrameBuffer *Plane1, XDpDma_FrameBuffer *Plane2)
	This function sets the next Frame Buffers to be displayed on the Video Channel. More...
void	XDpDma_DisplayGfxFrameBuffer (XDpDma *InstancePtr, XDpDma_FrameBuffer *Plane)
	This function sets the next Frame Buffers to be displayed on the Graphics Channel. More...
int	XDpDma_PlayAudio (XDpDma *InstancePtr, XDpDma_AudioBuffer *Buffer, u8 ChannelNum)
	This function sets the next Audio Buffer to be played on Audio Channel 0. More...
void	XDpDma_SetupChannel (XDpDma *InstancePtr, XDpDma_ChannelType Channel)
	This function sets the channel with the latest framebuffer and the available descriptor for transfer on the next Vsync. More...

Function Documentation

void XDpDma_CfgInitialize	(	XDpDma *	InstancePtr,
		XDpDma_Config *	CfgPtr
	)

This functions retrieves the configuration for this DPDMA driver and fills in the InstancePtr->Config structure.

Parameters

InstancePtr	is a pointer to the driver instance.
CfgPtr	is a pointer to the configuration structure that will be used to copy the settings from.

Returns

None.

Note

None.

Referenced by InitDpDmaSubsystem().

void XDpDma_DisplayGfxFrameBuffer	(	XDpDma *	InstancePtr,
		XDpDma_FrameBuffer *	Plane
	)

This function sets the next Frame Buffers to be displayed on the Graphics Channel.

Parameters

InstancePtr	is pointer to the instance of DPDMA.
Plane	is a pointer to the Frame Buffer structure.

Returns

None.

Note

None.

Referenced by DpPsu_Run().

void XDpDma_DisplayVideoFrameBuffer	(	XDpDma *	InstancePtr,
		XDpDma_FrameBuffer *	Plane0,
		XDpDma_FrameBuffer *	Plane1,
		XDpDma_FrameBuffer *	Plane2
	)

This function sets the next Frame Buffers to be displayed on the Video Channel.

Parameters

InstancePtr	is pointer to the instance of DPDMA.
Plane0	is a pointer to the Frame Buffer structure.
Plane1	is a pointer to the Frame Buffer structure.
Plane2	is a pointer to the Frame Buffer structure.

Returns

None.

Note

For interleaved mode use Plane0. For semi-planar mode use Plane0 and Plane1. For planar mode use Plane0, Plane1 and Plane2

void XDpDma_InitAudioDescriptor	(	XDpDma_AudioChannel *	Channel,
		XDpDma_AudioBuffer *	AudioBuffer
	)

This function intializes Descriptors for transactions on Audio Channel.

Parameters

Channel	is a pointer to the XDpDma_AudioChannel instance
AudioBuffer	is a pointer to the Audio Buffer structure

Returns

None.

Note

None.

Referenced by XDpDma_PlayAudio(), and XDpDma_SetupChannel().

void XDpDma_InitVideoDescriptor	(	XDpDma_Descriptor *	CurrDesc,
		XDpDma_FrameBuffer *	FrameBuffer
	)

This function intializes Video Descriptor for Video and Graphics channel.

Parameters

CurrDesc	is a pointer to the current Descriptor of Video or Graphics Channel.
FrameBuffer	is a pointer to the Frame Buffer structure

Returns

None.

Note

None.

Referenced by XDpDma_SetupChannel().

int XDpDma_PlayAudio	(	XDpDma *	InstancePtr,
		XDpDma_AudioBuffer *	Buffer,
		u8	ChannelNum
	)

This function sets the next Audio Buffer to be played on Audio Channel 0.

Parameters

InstancePtr	is pointer to the instance of DPDMA.
Buffer	is a pointer to the attributes of the Audio information to be played.
ChannelNum	selects between Audio Channel 0 and Audio Channel 1

Returns

XST_SUCCESS when the play audio request is successful. XST_FAILURE when the play audio request fails, user has to retry to play the audio.

Note

The user has to schedule new audio buffer before half the audio information is consumed by DPDMA to have a seamless playback.

References XDpDma_InitAudioDescriptor().

int XDpDma_ReTrigger	(	XDpDma *	InstancePtr,
		XDpDma_ChannelType	Channel
	)

This function Retriggers DPDMA to fetch data from new descriptor.

Parameters

InstancePtr	is a pointer to the XDpDma instance.
Channel	is the XDpDma_ChannelType on which the transaction is to be retriggered.

Returns

XST_SUCCESS The channel has successfully been Triggered. XST_FAILURE When the triggering Video and Graphics channel without setting the Video Formats.

Note

None.

References XDPDMA_GBL, and XDpDma_WriteReg.

Referenced by XDpDma_VSyncHandler().

int XDpDma_SetChannelState	(	XDpDma *	InstancePtr,
		XDpDma_ChannelType	Channel,
		XDpDma_ChannelState	ChannelState
	)

This functions controls the states in which a channel should go into.

Parameters

InstancePtr	is a pointer to the driver instance.
Channel	is an enum of XDpDma_ChannelType.
ChannelState	is an enum of type XDpDma_ChannelState.

Returns

XST_SUCCESS when the mentioned channel is enabled successfully. XST_FAILURE when the mentioned channel fails to be enabled.

Note

None.

Referenced by DpPsu_Run(), XDpDma_InterruptHandler(), and XDpDma_VSyncHandler().

int XDpDma_SetGraphicsFormat	(	XDpDma *	InstancePtr,
		XAVBuf_VideoFormat	Format
	)

This function allocates DPDMA Graphics Channels.

Parameters

InstancePtr	is a pointer to the driver instance.
Format	is the video format to be used for the DPDMA transfer

Returns

XST_SUCCESS, When the format is a valid Graphics Format. XST_FAILURE, When the format is not valid Graphics Format.

Note

None.

Referenced by InitDpDmaSubsystem().

void XDpDma_SetQOS	(	XDpDma *	InstancePtr,
		u8	QOS
	)

This function starts the operation on the a given channel.

Parameters

InstancePtr	is a pointer to the driver instance.
QOS	is the Quality of Service value to be selected.

Returns

None.

Note

.

References XDPDMA_CH0_CNTL, and XDpDma_ReadModifyWrite.

Referenced by InitDpDmaSubsystem().

void XDpDma_SetupChannel	(	XDpDma *	InstancePtr,
		XDpDma_ChannelType	Channel
	)

This function sets the channel with the latest framebuffer and the available descriptor for transfer on the next Vsync.

Parameters

InstancePtr	is pointer to the instance of DPDMA.
Channel	indicates which channels are being setup for transfer.

Returns

None.

Note

None.

References XDpDma_InitAudioDescriptor(), and XDpDma_InitVideoDescriptor().

Referenced by XDpDma_VSyncHandler().

int XDpDma_SetVideoFormat	(	XDpDma *	InstancePtr,
		XAVBuf_VideoFormat	Format
	)

This function allocates DPDMA Video Channels depending on the number of planes in the video.

Parameters

InstancePtr	is a pointer to the driver instance.
Format	is the video format to be used for the DPDMA transfer

Returns

XST_SUCCESS, When the format is valid Video Format. XST_FAILURE, When the format is not valid Video Format

Note

None.

int XDpDma_Trigger	(	XDpDma *	InstancePtr,
		XDpDma_ChannelType	Channel
	)

This function Triggers DPDMA to start the transaction.

Parameters

InstancePtr	is a pointer to the XDpDma instance.
Channel	is the XDpDma_ChannelType on which the transaction is to be triggered.

Returns

XST_SUCCESS The channel has successfully been Triggered. XST_FAILURE When the triggering Video and Graphics channel without setting the Video Formats.

Note

None.

References XDPDMA_GBL, and XDpDma_WriteReg.

Referenced by XDpDma_VSyncHandler().