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Display Subsystem Integration
Table 7-22. Display Subsystem Interrupts (continued)
Interrupt Name
Description
VID1ENDWINDOW
The screen reached the end of video1 window. All data for the video window are
fetched from the memory and displayed on the screen.
VID2FIFOUNDERFLOW
The input video2 FIFO goes underflow.
VID2ENDWINDOW
The screen reached the end of video2 window. All data for the video window are
fetched from the memory and displayed on the screen.
SYNCLOST
Interrupt occurs when VSYNC width/front or back porches are not wide enough to
load the pipelines with data (LCD output).
SYNCLOSTDIGITAL
Interrupt occurs when the display controller is not ready to output data when a
digital request occurs. This interrupt informs that the timings of the NTSC/PAL
video encoder are not set correctly.
WAKEUP
Occurs when the wakeup signal is asserted
NOTE:
To clear a synchronization lost interrupt, follow this sequence:
1. Clear the DSS.
[0] LCDENABLE (LCD: SYNCLOST interrupt) or
DSS.
[1] DIGITALENABLE (TV: SYNCLOSTDIGITAL interrupt) bits.
Check the interrupts.
LCD: Verify that a FRAMEDONE interrupt occurs.
TV : Verify that EVSYNC_EVEN or EVSYNC_ODD interrupts occur.
2. Set the DSS.
[1] SOFTRESET bit to reset the display subsystem.
3. Set the display subsystem registers again.
NOTE:
The SYNCLOSTDIGITAL interrupts, which occur before the first VSYNC pulse signal (from
the video encoder), must not be considered.
After the first VSYNC pulse signal, the SYNCLOSTDIGITAL interrupt status bit must be
cleared by writing 1 in the DSS.
[15] SYNCLOSTDIGITAL bit; then the
SYNCLOSTDIGITAL interrupt can be enabled by setting the DSS.
SYNCLOSTDIGITAL bit.
7.3.2.2.2 DSI Interrupt Request
The DSI protocol engine requires a single interrupt line, DSI_IRQ. The DSS.
register
indicates the general interrupt events. See
. Each VC and complex I/O has a dedicated
interrupt register: DSS.
and DSS.
respectively.
See
and
indicates the DSI global interrupt events.
Table 7-23. DSI Global Interrupts
Interrupt Name
Description
RESYNCHRONIZATION_IRQ
Resynchronization in video mode
TA_TO_IRQ
Turn-around timer expired
LDO_POWER_GOOD_IRQ
Signal LDOPWRGOOD from the DSI_PHY changes its state for the supply
VDDALDODSIPLL from up to down or down to up.
SYNC_LOST_IRQ
Synchronization with video mode port is lost (video mode only)
ACK_TRIGGER_IRQ
Acknowledge trigger is received
TE_TRIGGER_IRQ
Tearing effect trigger is received
WAKEUP_IRQ
Occurs when the SWakeUp signal is asserted
HS_TX_TO_IRQ
High speed TX Time-out Interrupt
LP_RX_TO_IRQ
Low speed RX Time-out Interrupt
1631
SWPU177N – December 2009 – Revised November 2010
Display Subsystem
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