Table of Contents
Advertisement
VGA_MAIN_TEST_VSTATUS_NO_DISPLAY_C
RTC_TIMEOUT
VGA Main control
Field Name
VGA_TEST_ENABLE
VGA_TEST_RENDER_START
VGA_TEST_RENDER_DONE (R)
VGA_TEST_RENDER_DISPBUF_SELECT
VGA test control register
Field Name
VGA_DEBUG_READBACK_INDEX
VGA debug readback index register
© 2007 Advanced Micro Devices, Inc.
Proprietary
31
VGA_TEST_CONTROL - RW - 32 bits - DISPDEC:0x354
Bits
0
8
16
24
VGA_DEBUG_READBACK_INDEX - RW - 32 bits - DISPDEC:0x358
Bits
7:0
0x0
For testing purposes, makes the virtual vertical retrace, the crtc time-
out and the virtual no display horizontal pulses faster by using the
engine clock frequency instead of 1MHz reference
0=VGACRTC timeout is as indicated by VGA_CRTC_TIMEOUT,
virtual vertical retrace duration is as indicated by
VGA_VIRTUAL_VERTICAL_RETRACE_DURATION, virtual no dis-
play horizontal pulses are 31.25 KHz if
VGA_READBACK_NO_DISPLAY_SOURCE_SELECT is zero
1=VGACRTC timeout is one 400th of what is indicated by
VGA_CRTC_TIMEOUT, virtual vertical retrace duration one 400th of
what is indicated by
VGA_VIRTUAL_VERTICAL_RETRACE_DURATION, virtual no dis-
play horizontal pulses are 400*31.25 KHz if
VGA_READBACK_NO_DISPLAY_SOURCE_SELECT is zero
Default
0x0
Controls wether the vga render looks at vertical blank signals from
the displays to start rendering or will start through a register write
0=Render responds to status signals from DISP1, DISP2
1=Render responds to VGA_TEST_RENDER_START
0x0
Starts the vga render
0=No event
1=Every time this is written with a high, if VGA_TEST_ENABLE is
set, VGA Rendering starts
0x0
Signals when the vga render is done rendering
0=No event
1=If VGA_TEST_ENABLE is set, VGA Rendering is done
0x0
Selects to which display buffer the render will render in test mode
(VGA_TEST_ENABLE=1)
0=VGA Render will write into DISPBUF1 starting at
VGA_DISPBUF1_SURFACE_ADDR
1=VGA Render will write into DISPBUF2 starting at
VGA_DISPBUF2_SURFACE_ADDR
Default
0x0
Index for the VGA debug readback
VGA Registers
Description
Description
M56 Register Reference Manual
2-193
Advertisement
Table of Contents
