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| author | Oswald Buddenhagen <oswald.buddenhagen@gmx.de> | 2023-04-22 19:10:15 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-04-23 10:15:13 +0300 |
| commit | a869057cd639ed41a1b16bc072fb20cb1ed1dc51 (patch) | |
| tree | a25325df0d46bdbae48fbb391e2dac1ffb19cc45 /sound/pci/emu10k1/emufx.c | |
| parent | 6fb861bb3caf2ca8e440f7a3fdcca35fcac917b4 (diff) | |
| download | linux-a869057cd639ed41a1b16bc072fb20cb1ed1dc51.tar.xz | |
ALSA: emu10k1: comment updates
Move comments to better locations, de-duplicate, fix/remove incorrect/
outdated ones, add new ones, and unify spacing somewhat.
While at it, also add testing credits for Jonathan Dowland (SB Live!
Platinum) and myself (E-MU 0404b).
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230422161021.1143903-2-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/emu10k1/emufx.c')
| -rw-r--r-- | sound/pci/emu10k1/emufx.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/sound/pci/emu10k1/emufx.c b/sound/pci/emu10k1/emufx.c index 6a51aed59238..510b776f856d 100644 --- a/sound/pci/emu10k1/emufx.c +++ b/sound/pci/emu10k1/emufx.c @@ -1187,8 +1187,8 @@ snd_emu10k1_init_stereo_onoff_control(struct snd_emu10k1_fx8010_control_gpr *ctl } /* - * Used for emu1010 - conversion from 32-bit capture inputs from HANA - * to 2 x 16-bit registers in audigy - their values are read via DMA. + * Used for emu1010 - conversion from 32-bit capture inputs from the FPGA + * to 2 x 16-bit registers in Audigy - their values are read via DMA. * Conversion is performed by Audigy DSP instructions of FX8010. */ static int snd_emu10k1_audigy_dsp_convert_32_to_2x16( @@ -1330,8 +1330,9 @@ static int _snd_emu10k1_audigy_init_efx(struct snd_emu10k1 *emu) #define A_ADD_VOLUME_IN(var,vol,input) \ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input)) - /* emu1212 DSP 0 and DSP 1 Capture */ if (emu->card_capabilities->emu_model) { + /* EMU1010 DSP 0 and DSP 1 Capture */ + // The 24 MSB hold the actual value. We implicitly discard the 16 LSB. if (emu->card_capabilities->ca0108_chip) { /* Note:JCD:No longer bit shift lower 16bits to upper 16bits of 32bit value. */ A_OP(icode, &ptr, iMACINT0, A_GPR(tmp), A_C_00000000, A3_EMU32IN(0x0), A_C_00000001); @@ -1636,8 +1637,11 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input)) #endif if (emu->card_capabilities->emu_model) { + /* Capture 16 channels of S32_LE sound. */ if (emu->card_capabilities->ca0108_chip) { dev_info(emu->card->dev, "EMU2 inputs on\n"); + /* Note that the Tina[2] DSPs have 16 more EMU32 inputs which we don't use. */ + for (z = 0; z < 0x10; z++) { snd_emu10k1_audigy_dsp_convert_32_to_2x16( icode, &ptr, tmp, bit_shifter16, @@ -1646,7 +1650,7 @@ A_OP(icode, &ptr, iMAC0, A_GPR(var), A_GPR(var), A_GPR(vol), A_EXTIN(input)) } } else { dev_info(emu->card->dev, "EMU inputs on\n"); - /* Capture 16 (originally 8) channels of S32_LE sound */ + /* Note that the Alice2 DSPs have 6 I2S inputs which we don't use. */ /* dev_dbg(emu->card->dev, "emufx.c: gpr=0x%x, tmp=0x%x\n", |