Регистры Allwinner H616
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TVE_128_REG
7.2.5. TV Encoder Video Chroma BW and CompGain Register - адрес: 0x6520128 0x6524128 (смещение: 0x0128)

ТВ-кодер: список регистров

  Unused

Bits 31 : 18

  CHROMA_BW

Bits 17 : 16
R/W
0x0

Chroma filter bandwidth selection


This bit specifies whether the bandwidth of the chroma filter is:00: Narrow width 0.6 MHz
01: Wide width 1.2 MHz
10: Extra width 1.8 MHz
11: Ultra width 2.5 MHz
Default is 0.6 MHz(value 0)

  Unused

Bits 15 : 2

  COMP_CH_GAIN

Bits 1 : 0
R/W
0x0

Chroma gain selection for the composite video signal.

These bits specify the gain of the chroma signal for composing with the luma
signal to generate the composite video signal:
00: 100%
01: 25%
10: 50%
11: 75%

Команда U-Boot для чтения регистра

md 6520128 1
md 6524128 1

Bit fields structure 

typedef union  tve_128_reg
{
  struct
  {
   unsigned comp_ch_gain : 2;
   unsigned unused0 : 14;
   unsigned chroma_bw : 2;
   unsigned unused1 : 14;
  } b;
   unsigned long w;
} TVE_128_REG
Allwinner H616 Manual