ALSA: usb-audio: Support jack detection on Dell dock
The Dell WD15 dock has a headset and a line out port. Add support for detecting if a jack is inserted into one of these ports. For the headset jack, additionally determine if a mic is present. The WD15 contains an ALC4020 USB audio controller and ALC3263 audio codec from Realtek. It is a UAC 1 device, and UAC 1 does not support jack detection. Instead, jack detection works by sending HD Audio commands over vendor-type USB messages. I found out how it works by looking at USB captures on Windows. The audio codec is very similar to the one supported by sound/soc/codecs/rt298.c / rt298.h, some constant names and the mic detection are adapted from there. The realtek_add_jack function is adapted from build_connector_control in sound/usb/mixer.c. I tested this on a WD15 dock with the latest firmware. Signed-off-by: Jan Schär <jan@jschaer.ch> Link: https://lore.kernel.org/r/20220627171855.42338-1-jan@jschaer.ch Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Jan Schär
Takashi Iwai
parent
4a1e6ac7d5
commit
4b8ea38fab
@ -24,6 +24,7 @@
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#include <sound/asoundef.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/hda_verbs.h>
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#include <sound/hwdep.h>
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#include <sound/info.h>
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#include <sound/tlv.h>
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@ -1934,6 +1935,169 @@ static int snd_soundblaster_e1_switch_create(struct usb_mixer_interface *mixer)
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NULL);
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}
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/*
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* Dell WD15 dock jack detection
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*
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* The WD15 contains an ALC4020 USB audio controller and ALC3263 audio codec
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* from Realtek. It is a UAC 1 device, and UAC 1 does not support jack
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* detection. Instead, jack detection works by sending HD Audio commands over
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* vendor-type USB messages.
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*/
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#define HDA_VERB_CMD(V, N, D) (((N) << 20) | ((V) << 8) | (D))
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#define REALTEK_HDA_VALUE 0x0038
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#define REALTEK_HDA_SET 62
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#define REALTEK_HDA_GET_OUT 88
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#define REALTEK_HDA_GET_IN 89
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#define REALTEK_LINE1 0x1a
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#define REALTEK_VENDOR_REGISTERS 0x20
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#define REALTEK_HP_OUT 0x21
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#define REALTEK_CBJ_CTRL2 0x50
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#define REALTEK_JACK_INTERRUPT_NODE 5
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#define REALTEK_MIC_FLAG 0x100
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static int realtek_hda_set(struct snd_usb_audio *chip, u32 cmd)
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{
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struct usb_device *dev = chip->dev;
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u32 buf = cpu_to_be32(cmd);
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return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), REALTEK_HDA_SET,
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USB_RECIP_DEVICE | USB_TYPE_VENDOR | USB_DIR_OUT,
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REALTEK_HDA_VALUE, 0, &buf, sizeof(buf));
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}
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static int realtek_hda_get(struct snd_usb_audio *chip, u32 cmd, u32 *value)
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{
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struct usb_device *dev = chip->dev;
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int err;
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u32 buf = cpu_to_be32(cmd);
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err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), REALTEK_HDA_GET_OUT,
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USB_RECIP_DEVICE | USB_TYPE_VENDOR | USB_DIR_OUT,
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REALTEK_HDA_VALUE, 0, &buf, sizeof(buf));
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if (err < 0)
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return err;
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err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), REALTEK_HDA_GET_IN,
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USB_RECIP_DEVICE | USB_TYPE_VENDOR | USB_DIR_IN,
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REALTEK_HDA_VALUE, 0, &buf, sizeof(buf));
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if (err < 0)
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return err;
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*value = be32_to_cpu(buf);
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return 0;
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}
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static int realtek_ctl_connector_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct usb_mixer_elem_info *cval = kcontrol->private_data;
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struct snd_usb_audio *chip = cval->head.mixer->chip;
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u32 pv = kcontrol->private_value;
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u32 node_id = pv & 0xff;
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u32 sense;
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u32 cbj_ctrl2;
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bool presence;
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int err;
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err = snd_usb_lock_shutdown(chip);
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if (err < 0)
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return err;
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err = realtek_hda_get(chip,
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HDA_VERB_CMD(AC_VERB_GET_PIN_SENSE, node_id, 0),
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&sense);
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if (err < 0)
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goto err;
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if (pv & REALTEK_MIC_FLAG) {
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err = realtek_hda_set(chip,
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HDA_VERB_CMD(AC_VERB_SET_COEF_INDEX,
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REALTEK_VENDOR_REGISTERS,
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REALTEK_CBJ_CTRL2));
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if (err < 0)
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goto err;
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err = realtek_hda_get(chip,
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HDA_VERB_CMD(AC_VERB_GET_PROC_COEF,
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REALTEK_VENDOR_REGISTERS, 0),
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&cbj_ctrl2);
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if (err < 0)
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goto err;
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}
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err:
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snd_usb_unlock_shutdown(chip);
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if (err < 0)
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return err;
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presence = sense & AC_PINSENSE_PRESENCE;
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if (pv & REALTEK_MIC_FLAG)
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presence = presence && (cbj_ctrl2 & 0x0070) == 0x0070;
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ucontrol->value.integer.value[0] = presence;
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return 0;
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}
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static const struct snd_kcontrol_new realtek_connector_ctl_ro = {
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.iface = SNDRV_CTL_ELEM_IFACE_CARD,
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.name = "", /* will be filled later manually */
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.access = SNDRV_CTL_ELEM_ACCESS_READ,
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.info = snd_ctl_boolean_mono_info,
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.get = realtek_ctl_connector_get,
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};
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static int realtek_resume_jack(struct usb_mixer_elem_list *list)
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{
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snd_ctl_notify(list->mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
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&list->kctl->id);
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return 0;
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}
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static int realtek_add_jack(struct usb_mixer_interface *mixer,
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char *name, u32 val)
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{
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struct usb_mixer_elem_info *cval;
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struct snd_kcontrol *kctl;
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cval = kzalloc(sizeof(*cval), GFP_KERNEL);
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if (!cval)
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return -ENOMEM;
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snd_usb_mixer_elem_init_std(&cval->head, mixer,
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REALTEK_JACK_INTERRUPT_NODE);
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cval->head.resume = realtek_resume_jack;
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cval->val_type = USB_MIXER_BOOLEAN;
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cval->channels = 1;
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cval->min = 0;
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cval->max = 1;
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kctl = snd_ctl_new1(&realtek_connector_ctl_ro, cval);
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if (!kctl) {
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kfree(cval);
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return -ENOMEM;
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}
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kctl->private_value = val;
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strscpy(kctl->id.name, name, sizeof(kctl->id.name));
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kctl->private_free = snd_usb_mixer_elem_free;
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return snd_usb_mixer_add_control(&cval->head, kctl);
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}
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static int dell_dock_mixer_create(struct usb_mixer_interface *mixer)
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{
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int err;
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err = realtek_add_jack(mixer, "Line Out Jack", REALTEK_LINE1);
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if (err < 0)
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return err;
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err = realtek_add_jack(mixer, "Headphone Jack", REALTEK_HP_OUT);
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if (err < 0)
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return err;
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err = realtek_add_jack(mixer, "Headset Mic Jack",
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REALTEK_HP_OUT | REALTEK_MIC_FLAG);
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if (err < 0)
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return err;
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return 0;
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}
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static void dell_dock_init_vol(struct snd_usb_audio *chip, int ch, int id)
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{
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u16 buf = 0;
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@ -3245,6 +3409,9 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
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err = snd_soundblaster_e1_switch_create(mixer);
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break;
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case USB_ID(0x0bda, 0x4014): /* Dell WD15 dock */
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err = dell_dock_mixer_create(mixer);
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if (err < 0)
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break;
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err = dell_dock_mixer_init(mixer);
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break;
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