5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jan Schär <jan@xxxxxxxxxx> [ Upstream commit 4b8ea38fabab45ad911a32a336416062553dfe9c ] 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@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220627171855.42338-1-jan@xxxxxxxxxx Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> Stable-dep-of: 4413665dd6c5 ("ALSA: usb-audio: Add quirks for Dell WD19 dock") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- sound/usb/mixer_quirks.c | 167 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 167 insertions(+) diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c index 1f7c80541d03b..08cbcd69b3251 100644 --- a/sound/usb/mixer_quirks.c +++ b/sound/usb/mixer_quirks.c @@ -24,6 +24,7 @@ #include <sound/asoundef.h> #include <sound/core.h> #include <sound/control.h> +#include <sound/hda_verbs.h> #include <sound/hwdep.h> #include <sound/info.h> #include <sound/tlv.h> @@ -1792,6 +1793,169 @@ static int snd_soundblaster_e1_switch_create(struct usb_mixer_interface *mixer) NULL); } +/* + * Dell WD15 dock jack detection + * + * 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. + */ + +#define HDA_VERB_CMD(V, N, D) (((N) << 20) | ((V) << 8) | (D)) + +#define REALTEK_HDA_VALUE 0x0038 + +#define REALTEK_HDA_SET 62 +#define REALTEK_HDA_GET_OUT 88 +#define REALTEK_HDA_GET_IN 89 + +#define REALTEK_LINE1 0x1a +#define REALTEK_VENDOR_REGISTERS 0x20 +#define REALTEK_HP_OUT 0x21 + +#define REALTEK_CBJ_CTRL2 0x50 + +#define REALTEK_JACK_INTERRUPT_NODE 5 + +#define REALTEK_MIC_FLAG 0x100 + +static int realtek_hda_set(struct snd_usb_audio *chip, u32 cmd) +{ + struct usb_device *dev = chip->dev; + u32 buf = cpu_to_be32(cmd); + + return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), REALTEK_HDA_SET, + USB_RECIP_DEVICE | USB_TYPE_VENDOR | USB_DIR_OUT, + REALTEK_HDA_VALUE, 0, &buf, sizeof(buf)); +} + +static int realtek_hda_get(struct snd_usb_audio *chip, u32 cmd, u32 *value) +{ + struct usb_device *dev = chip->dev; + int err; + u32 buf = cpu_to_be32(cmd); + + err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), REALTEK_HDA_GET_OUT, + USB_RECIP_DEVICE | USB_TYPE_VENDOR | USB_DIR_OUT, + REALTEK_HDA_VALUE, 0, &buf, sizeof(buf)); + if (err < 0) + return err; + err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), REALTEK_HDA_GET_IN, + USB_RECIP_DEVICE | USB_TYPE_VENDOR | USB_DIR_IN, + REALTEK_HDA_VALUE, 0, &buf, sizeof(buf)); + if (err < 0) + return err; + + *value = be32_to_cpu(buf); + return 0; +} + +static int realtek_ctl_connector_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *cval = kcontrol->private_data; + struct snd_usb_audio *chip = cval->head.mixer->chip; + u32 pv = kcontrol->private_value; + u32 node_id = pv & 0xff; + u32 sense; + u32 cbj_ctrl2; + bool presence; + int err; + + err = snd_usb_lock_shutdown(chip); + if (err < 0) + return err; + err = realtek_hda_get(chip, + HDA_VERB_CMD(AC_VERB_GET_PIN_SENSE, node_id, 0), + &sense); + if (err < 0) + goto err; + if (pv & REALTEK_MIC_FLAG) { + err = realtek_hda_set(chip, + HDA_VERB_CMD(AC_VERB_SET_COEF_INDEX, + REALTEK_VENDOR_REGISTERS, + REALTEK_CBJ_CTRL2)); + if (err < 0) + goto err; + err = realtek_hda_get(chip, + HDA_VERB_CMD(AC_VERB_GET_PROC_COEF, + REALTEK_VENDOR_REGISTERS, 0), + &cbj_ctrl2); + if (err < 0) + goto err; + } +err: + snd_usb_unlock_shutdown(chip); + if (err < 0) + return err; + + presence = sense & AC_PINSENSE_PRESENCE; + if (pv & REALTEK_MIC_FLAG) + presence = presence && (cbj_ctrl2 & 0x0070) == 0x0070; + ucontrol->value.integer.value[0] = presence; + return 0; +} + +static const struct snd_kcontrol_new realtek_connector_ctl_ro = { + .iface = SNDRV_CTL_ELEM_IFACE_CARD, + .name = "", /* will be filled later manually */ + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = snd_ctl_boolean_mono_info, + .get = realtek_ctl_connector_get, +}; + +static int realtek_resume_jack(struct usb_mixer_elem_list *list) +{ + snd_ctl_notify(list->mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, + &list->kctl->id); + return 0; +} + +static int realtek_add_jack(struct usb_mixer_interface *mixer, + char *name, u32 val) +{ + struct usb_mixer_elem_info *cval; + struct snd_kcontrol *kctl; + + cval = kzalloc(sizeof(*cval), GFP_KERNEL); + if (!cval) + return -ENOMEM; + snd_usb_mixer_elem_init_std(&cval->head, mixer, + REALTEK_JACK_INTERRUPT_NODE); + cval->head.resume = realtek_resume_jack; + cval->val_type = USB_MIXER_BOOLEAN; + cval->channels = 1; + cval->min = 0; + cval->max = 1; + kctl = snd_ctl_new1(&realtek_connector_ctl_ro, cval); + if (!kctl) { + kfree(cval); + return -ENOMEM; + } + kctl->private_value = val; + strscpy(kctl->id.name, name, sizeof(kctl->id.name)); + kctl->private_free = snd_usb_mixer_elem_free; + return snd_usb_mixer_add_control(&cval->head, kctl); +} + +static int dell_dock_mixer_create(struct usb_mixer_interface *mixer) +{ + int err; + + err = realtek_add_jack(mixer, "Line Out Jack", REALTEK_LINE1); + if (err < 0) + return err; + err = realtek_add_jack(mixer, "Headphone Jack", REALTEK_HP_OUT); + if (err < 0) + return err; + err = realtek_add_jack(mixer, "Headset Mic Jack", + REALTEK_HP_OUT | REALTEK_MIC_FLAG); + if (err < 0) + return err; + return 0; +} + static void dell_dock_init_vol(struct snd_usb_audio *chip, int ch, int id) { u16 buf = 0; @@ -2275,6 +2439,9 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer) err = snd_soundblaster_e1_switch_create(mixer); break; case USB_ID(0x0bda, 0x4014): /* Dell WD15 dock */ + err = dell_dock_mixer_create(mixer); + if (err < 0) + break; err = dell_dock_mixer_init(mixer); break; -- 2.43.0
