Documentation

Functions and Restrictions

The following table lists the graphics layers supported by the HiSilicon Framebuffer (HiFB). G0 and G1 are ultra-HD graphics layers, G2 is the cursor layer, and G3 and G4 are SD graphics layers.

Table 1 Basic information about each layer

Graphics Layer

Type

HiFB Name (FB Device)

VO Device Bound by Default

Supported Color Formats

Resolutions

Display Buffer

G0

UHD layer

fb0

0
  • ARGB8888
  • ARGB1555
  • ARGB4444
  • Minimum: 32 x 32
  • Maximum (default): 1920 x 1080

8100 KB

G1

UHD layer

fb1

1
  • ARGB8888
  • ARGB1555
  • ARGB4444
  • Minimum: 32 x 32
  • Maximum (default): 1920 x 1080

8100 KB

G2

Cursor layer

fb2

0
  • ARGB8888
  • ARGB1555
  • ARGB4444
  • Minimum: 8 x 8
  • Maximum (default): 256 x 256

256 KB

G3

SD layer

fb3

0
  • ARGB8888
  • ARGB1555
  • ARGB4444
  • CLUT4
  • CLUT2
  • Minimum: 8 x 8
  • Maximum (default): 720 x 576

1620 KB

G4

SD layer

fb4

1
  • ARGB8888
  • ARGB1555
  • ARGB4444
  • CLUT4
  • CLUT2
  • Minimum: 8 x 8
  • Maximum (default): 720 x 576

1620 KB