diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2012-05-07 09:24:37 +0200 |
|---|---|---|
| committer | malc <av1474@comtv.ru> | 2012-05-07 16:31:40 +0400 |
| commit | 7873bfb866c89f9e6eab28b14d0c2007b361150c (patch) | |
| tree | 52fae75f15b2fbdabc29f5c08e5d9964f487a6b3 /tcg/optimize.c | |
| parent | f94e9b9b3535ea977c5a919f88adf36da95a8292 (diff) | |
hw/ac97: Mask out unused bits of volume controls
The Linux ac97 drivers does a number of register read/write tests to
see how much resolution a volume control actually has.
This patch takes this into account by masking out any bits written to
a volume control reg which should not be there according to the spec.
After this the Linux ac97 driver correctly uses a range of 0 - 0x1f for
the PCM out volume, as stated in the spec, and we can fix the FIXME
in update_combined_volume_out().
This patch was also tested with a Windows XP guest without any issues.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: malc <av1474@comtv.ru>
Diffstat (limited to 'tcg/optimize.c')
0 files changed, 0 insertions, 0 deletions