The headphone jack framework has a well defined infrastructure for notifying userspace entities through input devices. Expose a jack device that carries information about if an offload capable device is connected. Applications can further identify specific offloading information through other SND kcontrols.
Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/soc/qcom/qdsp6/q6usb.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/sound/soc/qcom/qdsp6/q6usb.c b/sound/soc/qcom/qdsp6/q6usb.c index 392608db44f8..d85fcd5dda28 100644 --- a/sound/soc/qcom/qdsp6/q6usb.c +++ b/sound/soc/qcom/qdsp6/q6usb.c @@ -20,6 +20,7 @@ #include <sound/pcm_params.h> #include <sound/asound.h> #include <sound/q6usboffload.h> +#include <sound/jack.h>
#include "q6dsp-lpass-ports.h" #include "q6afe.h" @@ -37,6 +38,7 @@ struct q6usb_status { struct q6usb_port_data { struct q6afe_usb_cfg usb_cfg; struct snd_soc_usb *usb; + struct snd_soc_jack hs_jack; struct q6usb_offload priv; struct mutex mutex; unsigned long available_card_slot; @@ -279,6 +281,7 @@ static const struct snd_kcontrol_new q6usb_offload_control = { /* Build a mixer control for a UAC connector control (jack-detect) */ static void q6usb_connector_control_init(struct snd_soc_component *component) { + struct q6usb_port_data *data = dev_get_drvdata(component->dev); int ret;
ret = snd_ctl_add(component->card->snd_card, @@ -290,6 +293,11 @@ static void q6usb_connector_control_init(struct snd_soc_component *component) snd_ctl_new1(&q6usb_offload_dev_ctrl, component)); if (ret < 0) return; + + ret = snd_soc_card_jack_new(component->card, "USB offload", + SND_JACK_HEADSET, &data->hs_jack); + if (ret) + return; }
static int q6usb_audio_ports_of_xlate_dai_name(struct snd_soc_component *component, @@ -323,6 +331,9 @@ static int q6usb_alsa_connection_cb(struct snd_soc_usb *usb,
mutex_lock(&data->mutex); if (connected) { + if (!data->available_card_slot) + snd_jack_report(data->hs_jack.jack, 1); + /* * Update the latest USB headset plugged in, if session is * idle. @@ -338,6 +349,9 @@ static int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, clear_bit(sdev->card_idx, &data->available_card_slot); data->status[sdev->card_idx].num_pcm = 0; data->status[sdev->card_idx].chip_index = 0; + + if (!data->available_card_slot) + snd_jack_report(data->hs_jack.jack, 0); } mutex_unlock(&data->mutex);