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xduoox3: Disable the DAC's digital de-emphasis filter. 

Whether or not this is correct depends on how the source material was
mastered, digitized, and/or encoded.  There is no setting appropriate
for everything.

Eventually I'd like to make this configurable, but I'd want to have it
shared with more than one target first.

Change-Id: I20a0eff4b3dc2517c33db49d4f72e85bf81d1ca6
This commit is contained in:
Solomon Peachy 2020-10-15 13:22:51 -04:00
parent d544ce46a7
commit 0cde20fadb
1 changed files with 1 additions and 5 deletions
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6
firmware/target/mips/ingenic_jz47xx/codec-jz4760.c
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@ -203,7 +203,6 @@ void audiohw_set_frequency(int fsel)
{
unsigned int pll1_speed;
unsigned short mclk_div, bclk_div, func_mode;
unsigned char dem = CS4398_DEM_NONE;
// bclk is 2,3,4,6,8,12 ONLY
// mclk is 1..512
@ -250,21 +249,18 @@ void audiohw_set_frequency(int fsel)
pll1_speed = 426000000/4;
mclk_div = 52/4;
bclk_div = 4;
dem = CS4398_DEM_32000;
func_mode = 0;
break;
case HW_FREQ_44: // 2.8224 MHz
pll1_speed = 508000000 / 3;
mclk_div = 45 / 3;
bclk_div = 4;
dem = CS4398_DEM_44100;
func_mode = 0;
break;
case HW_FREQ_48: // 3.072 MHz
pll1_speed = 516000000/2/3;
mclk_div = 42/2/3;
bclk_div = 4;
dem = CS4398_DEM_48000;
func_mode = 0;
break;
case HW_FREQ_64: // 4.096 MHz
@ -307,7 +303,7 @@ void audiohw_set_frequency(int fsel)
/* 0 = Single-Speed Mode (<50KHz);
1 = Double-Speed Mode (50-100KHz);
2 = Quad-Speed Mode; (100-200KHz) */
cs4398_write_reg(CS4398_REG_MODECTL, (cs4398_read_reg(CS4398_REG_MODECTL) & ~(CS4398_FM_MASK|CS4398_DEM_MASK)) | func_mode | dem);
cs4398_write_reg(CS4398_REG_MODECTL, (cs4398_read_reg(CS4398_REG_MODECTL) & ~(CS4398_FM_MASK|CS4398_DEM_MASK)) | func_mode | CS4398_DEM_NONE);
if (func_mode == 2)
cs4398_write_reg(CS4398_REG_MISC, cs4398_read_reg(CS4398_REG_MISC) | CS4398_MCLKDIV2);
else