ALSA: usb-audio: Set the Control Selector to SU_SELECTOR_CONTROL for UAC2
Specified in section 5.2.5.6.1 of the USB Audio Class 2.0 definition. Solves the following error for C-Media 6632A (Asus Xonar U7): [ 8219.676164] cannot get ctl value: req = 0x81, wValue = 0x0, wIndex = 0x1400, type = 3 Signed-off-by: Johan Rastén <johan@oljud.se> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -2033,10 +2033,11 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
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cval->res = 1;
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cval->initialized = 1;
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if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
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cval->control = UAC2_CX_CLOCK_SELECTOR;
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else
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if (state->mixer->protocol == UAC_VERSION_1)
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cval->control = 0;
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else /* UAC_VERSION_2 */
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cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ?
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UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR;
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namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
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if (!namelist) {
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