ALSA: virtuoso: use headphone gain setting only on front DAC

Do not apply the headphone gain offset to any but the front DAC.  These
DACs would not be used in headphone mode, so this saves a few register
writes.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/oxygen/xonar_pcm179x.c b/sound/pci/oxygen/xonar_pcm179x.c
index 2d0a634a7239d5afe74e4107148e2ac532f3afdb..e15ecee2ccf72e18d9f4f72469f6af288072d21d 100644 (file)
--- a/sound/pci/oxygen/xonar_pcm179x.c
+++ b/sound/pci/oxygen/xonar_pcm179x.c
@@ -319,6 +319,7 @@ static void pcm1796_registers_init(struct oxygen *chip)
                pcm1796_write(chip, i, 20,
                              data->pcm1796_regs[0][20 - PCM1796_REG_BASE]);
                pcm1796_write(chip, i, 21, 0);
+               gain_offset = 0;
        }
 }
 
@@ -615,6 +616,7 @@ static void update_pcm1796_volume(struct oxygen *chip)
                                     + gain_offset);
                pcm1796_write_cached(chip, i, 17, chip->dac_volume[i * 2 + 1]
                                     + gain_offset);
+               gain_offset = 0;
        }
 }