[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240203023645.31105-46-quic_wcheng@quicinc.com>
Date: Fri, 2 Feb 2024 18:36:37 -0800
From: Wesley Cheng <quic_wcheng@...cinc.com>
To: <srinivas.kandagatla@...aro.org>, <mathias.nyman@...el.com>,
<perex@...ex.cz>, <conor+dt@...nel.org>, <corbet@....net>,
<lgirdwood@...il.com>, <andersson@...nel.org>,
<krzysztof.kozlowski+dt@...aro.org>, <gregkh@...uxfoundation.org>,
<Thinh.Nguyen@...opsys.com>, <broonie@...nel.org>,
<bgoswami@...cinc.com>, <tiwai@...e.com>, <robh+dt@...nel.org>,
<konrad.dybcio@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-sound@...r.kernel.org>, <linux-usb@...r.kernel.org>,
<linux-arm-msm@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<alsa-devel@...a-project.org>, Wesley Cheng <quic_wcheng@...cinc.com>
Subject: [PATCH v13 45/53] ASoC: usb: Create SOC USB SND jack kcontrol
Expose API for creation of a jack control for notifying of available
devices that are plugged in/discovered, and that support offloading. This
allows for control names to be standardized across implementations of USB
audio offloading.
Signed-off-by: Wesley Cheng <quic_wcheng@...cinc.com>
---
include/sound/soc-usb.h | 4 ++++
sound/soc/soc-usb.c | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/include/sound/soc-usb.h b/include/sound/soc-usb.h
index c05d9b2f5c90..e07e83d86a11 100644
--- a/include/sound/soc-usb.h
+++ b/include/sound/soc-usb.h
@@ -6,6 +6,8 @@
#ifndef __LINUX_SND_SOC_USB_H
#define __LINUX_SND_SOC_USB_H
+#include <sound/soc.h>
+
enum snd_soc_usb_dai_state {
SND_SOC_USB_IDLE,
SND_SOC_USB_PREPARED,
@@ -76,6 +78,8 @@ int snd_soc_usb_prepare_session(struct snd_soc_usb *usb, int card_idx, int pcm_i
int snd_soc_usb_shutdown_session(struct snd_soc_usb *usb, int session_id);
int snd_soc_usb_set_session_state(struct snd_soc_usb *usb, int session_id,
enum snd_soc_usb_dai_state state);
+int snd_soc_usb_setup_offload_jack(struct snd_soc_component *component,
+ struct snd_soc_jack *jack);
struct snd_soc_usb *snd_soc_usb_allocate_port(struct snd_soc_component *component,
int num_supported_streams, void *data);
diff --git a/sound/soc/soc-usb.c b/sound/soc/soc-usb.c
index 9c082129cb9f..f22fd1b6d294 100644
--- a/sound/soc/soc-usb.c
+++ b/sound/soc/soc-usb.c
@@ -4,8 +4,11 @@
*/
#include <linux/of.h>
#include <linux/usb.h>
+
+#include <sound/jack.h>
#include <sound/soc.h>
#include <sound/soc-usb.h>
+
#include "../usb/card.h"
static DEFINE_MUTEX(ctx_mutex);
@@ -42,6 +45,40 @@ static struct snd_soc_usb *snd_soc_find_usb_ctx(struct device_node *node)
}
/* SOC USB sound kcontrols */
+
+/**
+ * snd_soc_usb_setup_offload_jack() - Create USB offloading jack
+ * @component: USB DPCM backend DAI component
+ * @jack: jack structure to create
+ *
+ * Creates a jack device for notifying userspace of the availability
+ * of an offload capable device.
+ *
+ * Returns 0 on success, negative on error.
+ *
+ */
+int snd_soc_usb_setup_offload_jack(struct snd_soc_component *component,
+ struct snd_soc_jack *jack)
+{
+ int ret;
+
+ ret = snd_soc_card_jack_new(component->card, "SNDUSB OFFLD Jack",
+ SND_JACK_HEADPHONE, jack);
+ if (ret < 0) {
+ dev_err(component->card->dev, "Unable to add USB offload jack\n");
+ return ret;
+ }
+
+ ret = snd_soc_component_set_jack(component, jack, NULL);
+ if (ret) {
+ dev_warn(component->card->dev, "Failed to set jack: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_usb_setup_offload_jack);
+
static int snd_soc_usb_get_offload_status(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
Powered by blists - more mailing lists