[ALSA] ac97 - Fix confliction of DRA and surround slots

Modules: AC97 Codec

Fixed the confliction of DRA and surround slots 7/8.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/pci/ac97/ac97_pcm.c b/sound/pci/ac97/ac97_pcm.c
index dd289b9512e1..ded13165d635 100644
--- a/sound/pci/ac97/ac97_pcm.c
+++ b/sound/pci/ac97/ac97_pcm.c
@@ -303,6 +303,15 @@ int snd_ac97_set_rate(ac97_t *ac97, int reg, unsigned int rate)
                                      AC97_EA_DRA, dbl ? AC97_EA_DRA : 0);
         snd_ac97_update(ac97, reg, tmp & 0xffff);
         snd_ac97_read(ac97, reg);
+        if ((ac97->ext_id & AC97_EI_DRA) && reg == AC97_PCM_FRONT_DAC_RATE) {
+                /* Intel controllers require double rate data to be put in
+                 * slots 7+8
+                 */
+                snd_ac97_update_bits(ac97, AC97_GENERAL_PURPOSE,
+                                     AC97_GP_DRSS_MASK,
+                                     dbl ? AC97_GP_DRSS_78 : 0);
+                snd_ac97_read(ac97, AC97_GENERAL_PURPOSE);
+        }
         return 0;
 }