[ALSA] via82xx: add support for VIA VT8251 (AC'97)
Add support for VIA VT8251 AC'97. Includes a workaround which ensures sound
won't stop playing after one second of playback.
Signed-off-by: Bastiaan Jacques <b.jacques@planet.nl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
index 0f171dd..1b740dd 100644
--- a/sound/pci/via82xx.c
+++ b/sound/pci/via82xx.c
@@ -123,6 +123,7 @@
#define VIA_REV_8233A 0x40 /* 1 rec, 1 multi-pb, spdf */
#define VIA_REV_8235 0x50 /* 2 rec, 4 pb, 1 multi-pb, spdif */
#define VIA_REV_8237 0x60
+#define VIA_REV_8251 0x70
/*
* Direct registers
@@ -863,8 +864,15 @@
status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
if (!(status & VIA_REG_STAT_ACTIVE)) {
- res = 0;
- goto unlock;
+ /* An apparent bug in the 8251 is worked around by sending
+ * a REG_CTRL_START. */
+ if (chip->revision == VIA_REV_8251)
+ snd_via82xx_pcm_trigger(substream,
+ SNDRV_PCM_TRIGGER_START);
+ else {
+ res = 0;
+ goto unlock;
+ }
}
if (count & 0xffffff) {
idx = count >> 24;
@@ -2313,6 +2321,7 @@
{ VIA_REV_8233A, "VIA 8233A", TYPE_VIA8233A },
{ VIA_REV_8235, "VIA 8235", TYPE_VIA8233 },
{ VIA_REV_8237, "VIA 8237", TYPE_VIA8233 },
+ { VIA_REV_8251, "VIA 8251", TYPE_VIA8233 },
};
/*
@@ -2342,6 +2351,7 @@
{ .subvendor = 0x1043, .subdevice = 0x810d, .action = VIA_DXS_SRC }, /* ASUS */
{ .subvendor = 0x1043, .subdevice = 0x812a, .action = VIA_DXS_SRC }, /* ASUS A8V Deluxe */
{ .subvendor = 0x1043, .subdevice = 0x8174, .action = VIA_DXS_SRC }, /* ASUS */
+ { .subvendor = 0x1043, .subdevice = 0x81b9, .action = VIA_DXS_SRC }, /* ASUS A8V-MX */
{ .subvendor = 0x1071, .subdevice = 0x8375, .action = VIA_DXS_NO_VRA }, /* Vobis/Yakumo/Mitac notebook */
{ .subvendor = 0x1071, .subdevice = 0x8399, .action = VIA_DXS_NO_VRA }, /* Umax AB 595T (VIA K8N800A - VT8237) */
{ .subvendor = 0x10cf, .subdevice = 0x118e, .action = VIA_DXS_ENABLE }, /* FSC laptop */