diff options
| -rw-r--r-- | sound/usb/mixer.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index a51f2320a3dd..bfb3484096a6 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -2300,8 +2300,16 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, for (valinfo = info->values; valinfo->control; valinfo++) { __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol); - if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1)))) - continue; + if (state->mixer->protocol == UAC_VERSION_1) { + if (!(controls[valinfo->control / 8] & + (1 << ((valinfo->control % 8) - 1)))) + continue; + } else { /* UAC_VERSION_2/3 */ + if (!uac_v2v3_control_is_readable(controls[valinfo->control / 8], + valinfo->control)) + continue; + } + map = find_map(state->map, unitid, valinfo->control); if (check_ignored_ctl(map)) continue; @@ -2313,6 +2321,11 @@ static int build_audio_procunit(struct mixer_build *state, int unitid, cval->val_type = valinfo->val_type; cval->channels = 1; + if (state->mixer->protocol > UAC_VERSION_1 && + !uac_v2v3_control_is_writeable(controls[valinfo->control / 8], + valinfo->control)) + cval->master_readonly = 1; + /* get min/max values */ if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) { __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol); |