DE2 register guide
Overview
Although DE2 is listed as a single block in the datasheet, it in fact contains several sub-blocks.
Sections
| Section
|
Subsection
|
Address
|
Size
|
Description
|
| CCU
|
CCU
|
0x01000000 - 0x01000014
|
?kiB
|
DE2 Clock Controller
|
| Mixer
|
Mixer0
|
0x01100000 - 0x011fffff
|
?kiB
|
Display Mixer 0
|
|
|
Mixer1
|
0x01200000 - 0x012fffff
|
?kiB
|
Display Mixer 1
|
| WB
|
WB
|
?
|
?kiB
|
Write Back Controller
|
CCU
| Register Name
|
Offset
|
Size
|
Description
|
| DE2_CCU_GATE
|
0x00
|
4 B
|
Module clock gate register
|
| DE2_CCU_BUS_GATE
|
0x04
|
4 B
|
Bus clock gate register
|
| DE2_CCU_RST
|
0x08
|
4 B
|
Bus reset register
|
| DE2_CCU_DIV
|
0x0c
|
4 B
|
Module clock division register
|
| DE2_CCU_SEL
|
0x10
|
4 B
|
Unknown
|
DE2_CCU_GATE
| Bit |
Read/Write |
Default |
description
|
| 31:3 |
/ |
/ |
Reserved
|
| 2 |
Read/Write |
0 |
Module clock gate for WB
|
| 1 |
Read/Write |
0 |
Module clock gate for Mixer 1
|
| 0 |
Read/Write |
0 |
Module clock gate for Mixer 0
|
DE2_CCU_BUS_GATE
| Bit |
Read/Write |
Default |
description
|
| 31:3 |
/ |
/ |
Reserved
|
| 2 |
Read/Write |
0 |
Bus gate for WB
|
| 1 |
Read/Write |
0 |
Bus gate for Mixer 1
|
| 0 |
Read/Write |
0 |
Bus gate for Mixer 0
|
DE2_CCU_RST
| Bit |
Read/Write |
Default |
description
|
| 31:3 |
/ |
/ |
Reserved
|
| 2 |
Read/Write |
0 |
Bus reset for WB (and on A83T, H3, R40 and unknown sun8iw{9,10} SoCs, it's also the bus reset for Mixer 1)
|
| 1 |
Read/Write |
0 |
Bus reset for Mixer 1 (on SoCs not mentioned above)
|
| 0 |
Read/Write |
0 |
Bus reset for Mixer 0
|
DE2_CCU_DIV
The real division value is the value in the register part + 1.
| Bit |
Read/Write |
Default |
description
|
| 31:12 |
/ |
/ |
Reserved
|
| 8:11 |
Read/Write |
0 |
Module clock division for WB
|
| 4:7 |
Read/Write |
0 |
Module clock division for Mixer 1
|
| 0:3 |
Read/Write |
0 |
Module clock division for Mixer 0
|
Mixer sub-functions
| Section
|
Starting Address to Mixer Base Address
|
Description
|
| Mixer Global Configuration
|
0x00000
|
Some Configuration among different sub-functions
|
| Blend Configuration
|
0x01000
|
Configuration about display channels and layers
|
| Other Configurations
|
0x20000
|
Something that not so known now
|