ALSA: jazz16: refine dma and irq selection

Narrow the dma and irq selection after the DOS driver.

Add ALSA configuration description as well.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/sound/isa/sb/sb8_main.c b/sound/isa/sb/sb8_main.c
index 3222aed5fac6..7d84c9f34dc9 100644
--- a/sound/isa/sb/sb8_main.c
+++ b/sound/isa/sb/sb8_main.c
@@ -510,7 +510,8 @@ static int snd_sb8_open(struct snd_pcm_substream *substream)
         }
         switch (chip->hardware) {
         case SB_HW_JAZZ16:
-                runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
+                if (chip->dma16 == 5 || chip->dma16 == 7)
+                        runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
                 runtime->hw.rates |= SNDRV_PCM_RATE_8000_48000;
                 runtime->hw.rate_min = 4000;
                 runtime->hw.rate_max = 50000;