diff options
author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-02 13:08:49 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-02 13:08:49 -0700 |
commit | f27f0a045b79de5729d064497e21a70871f1d6fe (patch) | |
tree | 078416852de43b76e297224b57a9c5b9f67dfb56 /sound/usb/usbmixer.c | |
parent | 6e0dd741a89be35defa05bd79f4211c5a2762825 (diff) | |
parent | c2f60c523aa34cf6d4913d6efc670890bd456fd5 (diff) |
Merge master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa
* master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa: (28 commits)
[ALSA] Kconfig SND_SEQUENCER_OSS help text fix
[ALSA] Add Aux input switch control for Aureon Universe
[ALSA] pcxhr - Fix the crash with REV01 board
[ALSA] sound/pci/hda: use create_singlethread_workqueue()
[ALSA] hda-intel - Add support of ATI SB600
[ALSA] cs4281 - Fix the check of timeout in probe
[ALSA] cs4281 - Fix the check of right channel
[ALSA] Test volume resolution of usb audio at initialization
[ALSA] maestro3.c: fix BUG, optimization
[ALSA] HDA/Realtek: multiple input mux definitions and pin mode additions
[ALSA] AdLib FM card driver
[ALSA] Fix / clean up PCM-OSS setup hooks
[ALSA] Clean up PCM codes (take 2)
[ALSA] Tiny clean up of PCM codes
[ALSA] ISA drivers bailing on first !enable[i]
[ALSA] Remove obsolete kfree_nocheck call
[ALSA] Remove obsolete kfree_nocheck call
[ALSA] Add snd-als300 driver for Avance Logic ALS300/ALS300+ soundcards
[ALSA] Add snd-riptide driver for Conexant Riptide chip
[ALSA] hda-codec - Fix noisy output wtih AD1986A 3stack model
...
Diffstat (limited to 'sound/usb/usbmixer.c')
-rw-r--r-- | sound/usb/usbmixer.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c index 8d08b34a1cb..ce86283ee0f 100644 --- a/sound/usb/usbmixer.c +++ b/sound/usb/usbmixer.c @@ -306,8 +306,8 @@ static int get_relative_value(struct usb_mixer_elem_info *cval, int val) cval->res = 1; if (val < cval->min) return 0; - else if (val > cval->max) - return (cval->max - cval->min) / cval->res; + else if (val >= cval->max) + return (cval->max - cval->min + cval->res - 1) / cval->res; else return (val - cval->min) / cval->res; } @@ -670,6 +670,36 @@ static int get_min_max(struct usb_mixer_elem_info *cval, int default_min) } if (cval->res == 0) cval->res = 1; + + /* Additional checks for the proper resolution + * + * Some devices report smaller resolutions than actually + * reacting. They don't return errors but simply clip + * to the lower aligned value. + */ + if (cval->min + cval->res < cval->max) { + int last_valid_res = cval->res; + int saved, test, check; + get_cur_mix_value(cval, minchn, &saved); + for (;;) { + test = saved; + if (test < cval->max) + test += cval->res; + else + test -= cval->res; + if (test < cval->min || test > cval->max || + set_cur_mix_value(cval, minchn, test) || + get_cur_mix_value(cval, minchn, &check)) { + cval->res = last_valid_res; + break; + } + if (test == check) + break; + cval->res *= 2; + } + set_cur_mix_value(cval, minchn, saved); + } + cval->initialized = 1; } return 0; @@ -695,7 +725,8 @@ static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_ if (! cval->initialized) get_min_max(cval, 0); uinfo->value.integer.min = 0; - uinfo->value.integer.max = (cval->max - cval->min) / cval->res; + uinfo->value.integer.max = + (cval->max - cval->min + cval->res - 1) / cval->res; } return 0; } |