[ALSA] intel8x0 - Add support of 8 channel sound
Added the support of 8 channel sound for codecs that are known to work.
So far, only ALC850 is marked as a 8ch-support codec.
This fix is a modified version of the patch on ALSA BTS#2097 by
Martin Ellis:
https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2097
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index c52abd0..07782ba 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -155,7 +155,8 @@
#define ICH_PCM_SPDIF_69 0x80000000 /* s/pdif pcm on slots 6&9 */
#define ICH_PCM_SPDIF_1011 0xc0000000 /* s/pdif pcm on slots 10&11 */
#define ICH_PCM_20BIT 0x00400000 /* 20-bit samples (ICH4) */
-#define ICH_PCM_246_MASK 0x00300000 /* 6 channels (not all chips) */
+#define ICH_PCM_246_MASK 0x00300000 /* chan mask (not all chips) */
+#define ICH_PCM_8 0x00300000 /* 8 channels (not all chips) */
#define ICH_PCM_6 0x00200000 /* 6 channels (not all chips) */
#define ICH_PCM_4 0x00100000 /* 4 channels (not all chips) */
#define ICH_PCM_2 0x00000000 /* 2 channels (stereo) */
@@ -382,6 +383,7 @@
unsigned multi4: 1,
multi6: 1,
+ multi8 :1,
dra: 1,
smp20bit: 1;
unsigned in_ac97_init: 1,
@@ -997,6 +999,8 @@
cnt |= ICH_PCM_4;
else if (runtime->channels == 6)
cnt |= ICH_PCM_6;
+ else if (runtime->channels == 8)
+ cnt |= ICH_PCM_8;
if (chip->device_type == DEVICE_NFORCE) {
/* reset to 2ch once to keep the 6 channel data in alignment,
* to start from Front Left always
@@ -1106,6 +1110,16 @@
.mask = 0,
};
+static unsigned int channels8[] = {
+ 2, 4, 6, 8,
+};
+
+static struct snd_pcm_hw_constraint_list hw_constraints_channels8 = {
+ .count = ARRAY_SIZE(channels8),
+ .list = channels8,
+ .mask = 0,
+};
+
static int snd_intel8x0_pcm_open(struct snd_pcm_substream *substream, struct ichdev *ichdev)
{
struct intel8x0 *chip = snd_pcm_substream_chip(substream);
@@ -1136,7 +1150,12 @@
if (err < 0)
return err;
- if (chip->multi6) {
+ if (chip->multi8) {
+ runtime->hw.channels_max = 8;
+ snd_pcm_hw_constraint_list(runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ &hw_constraints_channels8);
+ } else if (chip->multi6) {
runtime->hw.channels_max = 6;
snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
&hw_constraints_channels6);
@@ -2203,8 +2222,11 @@
}
if (pbus->pcms[0].r[0].slots & (1 << AC97_SLOT_PCM_SLEFT)) {
chip->multi4 = 1;
- if (pbus->pcms[0].r[0].slots & (1 << AC97_SLOT_LFE))
+ if (pbus->pcms[0].r[0].slots & (1 << AC97_SLOT_LFE)) {
chip->multi6 = 1;
+ if (chip->ac97[0]->flags & AC97_HAS_8CH)
+ chip->multi8 = 1;
+ }
}
if (pbus->pcms[0].r[1].rslots[0]) {
chip->dra = 1;
