Difference between revisions of "LCD Registers"

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m (moved LCD to LCD Registers)
(Remove content which has been moved to http://3dbrew.org/wiki/GPU)
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REG_*MAIN registers are used for the top LCD, while SUB is used for the bottom LCD. The registers for the main LCD is located at 0x1EF00400, while the sub LCD registers are located at 0x1EF00500.
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REG_*MAIN registers are used for the top LCD, while SUB is used for the bottom LCD.
  
 
== REG_LCDCOLORFILL ==
 
== REG_LCDCOLORFILL ==
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When the enable bit is set, the specified solid color is displayed on the LCD instead of the framebuffer.
 
When the enable bit is set, the specified solid color is displayed on the LCD instead of the framebuffer.
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== 0x1EF00X5C ==
 
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{| class="wikitable" border="1"
 
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!  Bit
 
−
!  Description
 
−
|-
 
−
| 15-0
 
−
| Framebuffer width
 
−
|-
 
−
| 31-16
 
−
| Framebuffer height
 
−
|}
 
−
 
−
This controls the displayed LCD framebuffer dimensions.
 
−
 
−
== 0x1EF00X70 ==
 
−
{| class="wikitable" border="1"
 
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!  Bit
 
−
!  Description
 
−
|-
 
−
| 15-0
 
−
| Framebuffer format
 
−
|-
 
−
| 31-16
 
−
| ?
 
−
|}
 
−
 
−
=== Framebuffer format ===
 
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{| class="wikitable" border="1"
 
−
|-
 
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!  Bit
 
−
!  Description
 
−
|-
 
−
| 2-0
 
−
| Color format
 
−
|-
 
−
| 3
 
−
| ?
 
−
|-
 
−
| 4
 
−
| Unused?
 
−
|-
 
−
| 5
 
−
| Set when the main screen 3D right framebuffer address is set.
 
−
|-
 
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| 6
 
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| 1 = main screen, 0 = sub screen. However if bit5 is set, this bit is cleared.
 
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|-
 
−
| 7
 
−
| ?
 
−
|-
 
−
| 9-8
 
−
| Value 1 = unknown: get rid of rainbow strip on top of screen, 3 = unknown: black screen.
 
−
|-
 
−
| 15-10
 
−
| Unused?
 
−
|}
 
−
 
−
GSP module only allows the LCD stereoscopy to be enabled when bit5=1 and bit6=0 here. When GSP module updates this register, GSP module will automatically disable the stereoscopy if those bits are not set for enabling stereoscopy.
 
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−
=== Framebuffer color formats ===
 
−
{| class="wikitable" border="1"
 
−
|-
 
−
!  Value
 
−
!  Description
 
−
!  Actual color components ordering
 
−
|-
 
−
| 0
 
−
| GL_RGBA8_OES
 
−
|
 
−
|-
 
−
| 1
 
−
| GL_RGB8_OES
 
−
| BGR
 
−
|-
 
−
| 2
 
−
| GL_RGB565_OES
 
−
| RGB
 
−
|-
 
−
| 3
 
−
| GL_RGB5_A1_OES
 
−
|
 
−
|-
 
−
| 4
 
−
| GL_RGBA4_OES
 
−
|
 
−
|}
 
−
 
−
== 0x1EF00X78 ==
 
−
{| class="wikitable" border="1"
 
−
!  Bit
 
−
!  Description
 
−
|-
 
−
| 0
 
−
| LCD framebuffer to display (0=first, 1=second)
 
−
|-
 
−
| 7-1
 
−
| ?
 
−
|-
 
−
| 31-8
 
−
| Unused
 
−
|}
 
−
 
−
== 0x1EF00X90 ==
 
−
{| class="wikitable" border="1"
 
−
!  Bit
 
−
!  Description
 
−
|-
 
−
| 31-0
 
−
| Framebuffer width * pixel byte-size.
 
−
|}
 
−
 
−
== Framebuffers ==
 
−
{| class="wikitable" border="1"
 
−
!  Process Virtual Address
 
−
!  Kernel Virtual Address
 
−
!  Physical Address
 
−
!  Description
 
−
|-
 
−
| 0x1EF00468
 
−
| 0xFFFCE468
 
−
| 0x10400468
 
−
| Main LCD, first framebuffer for 3D left
 
−
|-
 
−
| 0x1EF0046C
 
−
| 0xFFFCE46C
 
−
| 0x1040046C
 
−
| Main LCD, second framebuffer for 3D left
 
−
|-
 
−
| 0x1EF00494
 
−
| 0xFFFCE494
 
−
| 0x10400494
 
−
| Main LCD, first framebuffer for 3D right
 
−
|-
 
−
| 0x1EF00498
 
−
| 0xFFFCE498
 
−
| 0x10400498
 
−
| Main LCD, second framebuffer for 3D right
 
−
|-
 
−
| 0x1EF00568
 
−
| 0xFFFCE568
 
−
| 0x10400568
 
−
| Sub LCD, first framebuffer
 
−
|-
 
−
| 0x1EF0056C
 
−
| 0xFFFCE56C
 
−
| 0x1040056C
 
−
| Sub LCD, second framebuffer
 
−
|-
 
−
| 0x1EF00594
 
−
| 0xFFFCE594
 
−
| 0x10400594
 
−
| Sub LCD, unused first framebuffer
 
−
|-
 
−
| 0x1EF00598
 
−
| 0xFFFCE598
 
−
| 0x10400598
 
−
| Sub LCD, unused second framebuffer
 
−
|}
 
−
 
−
The above framebuffer registers contains the physical address for each framebuffer, normally located in FCRAM in the application's GSP heap. When other processes use GSP as well, the framebuffers for the process is stored in VRAM instead.
 
−
 
−
These LCD framebuffers normally contain the last rendered frames from the GPU. The framebuffers are drawn from left-to-right, instead of top-to-bottom.(Thus the beginning of the framebuffer is drawn starting at the left side of the screen)
 
−
 
−
Both of the 3D screen left/right framebuffers are displayed regardless of the 3D slider's state, however when the 3D slider is set to "off" the 3D effect is disabled. Normally when the 3D slider's state is set to "off" the left/right framebuffer addresses are set to the same physical address. When the 3D effect is disabled and the left/right framebuffers are set to separate addresses, the LCD seems to alternate between displaying the left/right framebuffer each frame.
 

Revision as of 17:22, 10 October 2014

Registers

NAME PHYSICAL ADDRESS PROCESS VIRTUAL ADDRESS KERNEL VIRTUAL ADDRESS WIDTH
REG_LCDCOLORFILLMAIN 0x10202204 0x1ED02204 0xFFFD6204 4
REG_LCDCOLORFILLSUB 0x10202A04 0x1ED02A04 0xFFFD6A04 4

REG_*MAIN registers are used for the top LCD, while SUB is used for the bottom LCD.

REG_LCDCOLORFILL

Bit Description
7-0 Red component intensity
15-8 Green component intensity
23-16 Blue component intensity
24 Enable
31-25 ?

When the enable bit is set, the specified solid color is displayed on the LCD instead of the framebuffer.

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