[ALSA] Support all sample rate conversion capabilities of DXS channels
Documentation,VIA82xx driver
Add support for full sample rate conversion capabilities of DXS
channels present in VIA VT8233/5/7 controllers:
- any sample rate in the 8000 ... 48000 Hz range is supported even if
the AC'97 codec supports only 48000 Hz output;
- different DXS channels can use different sample rates at the same
time (the controller performs required sample rate conversion and
mixing in hardware).
Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
index 9b4d74d..2f1e6eb 100644
--- a/sound/pci/via82xx.c
+++ b/sound/pci/via82xx.c
@@ -101,7 +101,7 @@
module_param_array(ac97_quirk, charp, NULL, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
module_param_array(dxs_support, int, NULL, 0444);
-MODULE_PARM_DESC(dxs_support, "Support for DXS channels (0 = auto, 1 = enable, 2 = disable, 3 = 48k only, 4 = no VRA)");
+MODULE_PARM_DESC(dxs_support, "Support for DXS channels (0 = auto, 1 = enable, 2 = disable, 3 = 48k only, 4 = no VRA, 5 = enable any sample rate)");
/* pci ids */
@@ -302,6 +302,7 @@
#define VIA_DXS_DISABLE 2
#define VIA_DXS_48K 3
#define VIA_DXS_NO_VRA 4
+#define VIA_DXS_SRC 5
/*
@@ -380,6 +381,7 @@
struct via_rate_lock rates[2]; /* playback and capture */
unsigned int dxs_fixed: 1; /* DXS channel accepts only 48kHz */
unsigned int no_vra: 1; /* no need to set VRA on DXS channels */
+ unsigned int dxs_src: 1; /* use full SRC capabilities of DXS */
unsigned int spdif_on: 1; /* only spdif rates work to external DACs */
snd_pcm_t *pcms[2];
@@ -924,15 +926,16 @@
via82xx_t *chip = snd_pcm_substream_chip(substream);
viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
snd_pcm_runtime_t *runtime = substream->runtime;
+ int ac97_rate = chip->dxs_src ? 48000 : runtime->rate;
int rate_changed;
u32 rbits;
- if ((rate_changed = via_lock_rate(&chip->rates[0], runtime->rate)) < 0)
+ if ((rate_changed = via_lock_rate(&chip->rates[0], ac97_rate)) < 0)
return rate_changed;
if (rate_changed) {
snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE,
chip->no_vra ? 48000 : runtime->rate);
- snd_ac97_set_rate(chip->ac97, AC97_SPDIF, runtime->rate);
+ snd_ac97_set_rate(chip->ac97, AC97_SPDIF, ac97_rate);
}
if (runtime->rate == 48000)
rbits = 0xfffff;
@@ -1074,6 +1077,12 @@
/* fixed DXS playback rate */
runtime->hw.rates = SNDRV_PCM_RATE_48000;
runtime->hw.rate_min = runtime->hw.rate_max = 48000;
+ } else if (chip->dxs_src && viadev->reg_offset < 0x40) {
+ /* use full SRC capabilities of DXS */
+ runtime->hw.rates = (SNDRV_PCM_RATE_CONTINUOUS |
+ SNDRV_PCM_RATE_8000_48000);
+ runtime->hw.rate_min = 8000;
+ runtime->hw.rate_max = 48000;
} else if (! ratep->rate) {
int idx = viadev->direction ? AC97_RATES_ADC : AC97_RATES_FRONT_DAC;
runtime->hw.rates = chip->ac97->rates[idx];
@@ -2149,6 +2158,7 @@
{ .vendor = 0x1043, .device = 0x8095, .action = VIA_DXS_NO_VRA }, /* ASUS A7V8X (FIXME: possibly VIA_DXS_ENABLE?)*/
{ .vendor = 0x1043, .device = 0x80a1, .action = VIA_DXS_NO_VRA }, /* ASUS A7V8-X */
{ .vendor = 0x1043, .device = 0x80b0, .action = VIA_DXS_NO_VRA }, /* ASUS A7V600 & K8V*/
+ { .vendor = 0x1043, .device = 0x812a, .action = VIA_DXS_SRC }, /* ASUS A8V Deluxe */
{ .vendor = 0x1071, .device = 0x8375, .action = VIA_DXS_NO_VRA }, /* Vobis/Yakumo/Mitac notebook */
{ .vendor = 0x10cf, .device = 0x118e, .action = VIA_DXS_ENABLE }, /* FSC laptop */
{ .vendor = 0x1106, .device = 0x4161, .action = VIA_DXS_NO_VRA }, /* ASRock K7VT2 */
@@ -2288,6 +2298,10 @@
chip->dxs_fixed = 1;
else if (dxs_support[dev] == VIA_DXS_NO_VRA)
chip->no_vra = 1;
+ else if (dxs_support[dev] == VIA_DXS_SRC) {
+ chip->no_vra = 1;
+ chip->dxs_src = 1;
+ }
}
if ((err = snd_via8233_init_misc(chip, dev)) < 0)
goto __error;