[alsa-devel] [PATCH v9 1/3] ASoC: hdmi-codec: use HDMI state notifier to add jack support
Philipp Zabel
p.zabel at pengutronix.de
Tue Nov 15 19:52:38 CET 2016
Use HDMI connection / disconnection notifications to update an ALSA
jack object. Also make a copy of the ELD block after every change.
Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
Changes since v8:
- Rebased onto the "video: add HDMI state notifier support" patch.
Now hdmi_codec_set_jack_detect needs to be passed the HDMI notifier
device so the correct notifier can be used.
---
include/sound/hdmi-codec.h | 7 +++
sound/soc/codecs/Kconfig | 1 +
sound/soc/codecs/hdmi-codec.c | 107 ++++++++++++++++++++++++++++++++++++++----
3 files changed, 107 insertions(+), 8 deletions(-)
diff --git a/include/sound/hdmi-codec.h b/include/sound/hdmi-codec.h
index 530c57b..6fe5de2 100644
--- a/include/sound/hdmi-codec.h
+++ b/include/sound/hdmi-codec.h
@@ -98,6 +98,13 @@ struct hdmi_codec_pdata {
void *data;
};
+struct snd_soc_codec;
+struct snd_soc_jack;
+
+int hdmi_codec_set_jack_detect(struct snd_soc_codec *codec,
+ struct snd_soc_jack *jack,
+ struct device *dev);
+
#define HDMI_CODEC_DRV_NAME "hdmi-audio-codec"
#endif /* __HDMI_CODEC_H__ */
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index c67667b..7ad5d78 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -511,6 +511,7 @@ config SND_SOC_HDMI_CODEC
select SND_PCM_ELD
select SND_PCM_IEC958
select HDMI
+ select HDMI_NOTIFIERS
config SND_SOC_ES8328
tristate "Everest Semi ES8328 CODEC"
diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index b904492..c0a0ba9 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -12,9 +12,12 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
+#include <linux/hdmi-notifier.h>
#include <linux/module.h>
+#include <linux/notifier.h>
#include <linux/string.h>
#include <sound/core.h>
+#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
@@ -36,11 +39,17 @@ LIST_HEAD(hdmi_device_list);
struct hdmi_codec_priv {
struct hdmi_codec_pdata hcd;
struct snd_soc_dai_driver *daidrv;
+ struct snd_soc_jack *jack;
struct hdmi_codec_daifmt daifmt[2];
struct mutex current_stream_lock;
struct snd_pcm_substream *current_stream;
struct snd_pcm_hw_constraint_list ratec;
+ struct mutex eld_lock;
uint8_t eld[MAX_ELD_BYTES];
+ struct device *dev;
+ struct hdmi_notifier *notifier;
+ struct notifier_block nb;
+ unsigned int jack_status;
};
static const struct snd_soc_dapm_widget hdmi_widgets[] = {
@@ -74,7 +83,9 @@ static int hdmi_eld_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
struct hdmi_codec_priv *hcp = snd_soc_component_get_drvdata(component);
+ mutex_lock(&hcp->eld_lock);
memcpy(ucontrol->value.bytes.data, hcp->eld, sizeof(hcp->eld));
+ mutex_unlock(&hcp->eld_lock);
return 0;
}
@@ -112,7 +123,7 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct hdmi_codec_priv *hcp = snd_soc_dai_get_drvdata(dai);
- int ret = 0;
+ int ret;
dev_dbg(dai->dev, "%s()\n", __func__);
@@ -131,17 +142,15 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
}
if (hcp->hcd.ops->get_eld) {
+ mutex_lock(&hcp->eld_lock);
ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
hcp->eld, sizeof(hcp->eld));
-
- if (!ret) {
+ if (!ret)
ret = snd_pcm_hw_constraint_eld(substream->runtime,
hcp->eld);
- if (ret)
- return ret;
- }
+ mutex_unlock(&hcp->eld_lock);
}
- return 0;
+ return ret;
}
static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
@@ -386,6 +395,78 @@ static struct snd_soc_codec_driver hdmi_codec = {
},
};
+static void hdmi_codec_jack_report(struct hdmi_codec_priv *hcp,
+ unsigned int jack_status)
+{
+ if (!hcp->jack)
+ return;
+
+ if (jack_status != hcp->jack_status) {
+ snd_soc_jack_report(hcp->jack, jack_status, SND_JACK_LINEOUT);
+ hcp->jack_status = jack_status;
+ }
+}
+
+static int hdmi_codec_notify(struct notifier_block *nb, unsigned long event,
+ void *data)
+{
+ struct hdmi_codec_priv *hcp = container_of(nb, struct hdmi_codec_priv,
+ nb);
+ struct hdmi_notifier *n = data;
+
+ if (!hcp->jack)
+ return NOTIFY_OK;
+
+ switch (event) {
+ case HDMI_NEW_ELD:
+ mutex_lock(&hcp->eld_lock);
+ memcpy(hcp->eld, n->eld, sizeof(hcp->eld));
+ mutex_unlock(&hcp->eld_lock);
+ /* fall through */
+ case HDMI_CONNECTED:
+ hdmi_codec_jack_report(hcp, SND_JACK_LINEOUT);
+ break;
+ case HDMI_DISCONNECTED:
+ hdmi_codec_jack_report(hcp, 0);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+/**
+ * hdmi_codec_set_jack_detect - register HDMI state notifier callback
+ * @codec: the hdmi-codec instance
+ * @jack: ASoC jack to report (dis)connection events on
+ * @dev: hdmi_notifier device, usually HDMI_TX or CEC device
+ */
+int hdmi_codec_set_jack_detect(struct snd_soc_codec *codec,
+ struct snd_soc_jack *jack,
+ struct device *dev)
+{
+ struct hdmi_codec_priv *hcp = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ hcp->notifier = hdmi_notifier_get(dev);
+ if (!hcp->notifier)
+ return -ENOMEM;
+
+ hcp->nb.notifier_call = hdmi_codec_notify;
+ ret = hdmi_notifier_register(hcp->notifier, &hcp->nb);
+ if (ret)
+ goto err_notifier_put;
+
+ hcp->jack = jack;
+
+ return 0;
+
+err_notifier_put:
+ hdmi_notifier_put(hcp->notifier);
+ hcp->notifier = NULL;
+ return ret;
+}
+EXPORT_SYMBOL_GPL(hdmi_codec_set_jack_detect);
+
static int hdmi_codec_probe(struct platform_device *pdev)
{
struct hdmi_codec_pdata *hcd = pdev->dev.platform_data;
@@ -441,6 +522,7 @@ static int hdmi_codec_probe(struct platform_device *pdev)
hcp->hcd = *hcd;
mutex_init(&hcp->current_stream_lock);
+ mutex_init(&hcp->eld_lock);
hcp->daidrv = devm_kzalloc(dev, dai_count * sizeof(*hcp->daidrv),
GFP_KERNEL);
@@ -460,6 +542,8 @@ static int hdmi_codec_probe(struct platform_device *pdev)
hcp->daidrv[i].name = hdmi_dai_name[hd->cnt++];
}
+ dev_set_drvdata(dev, hcp);
+
ret = snd_soc_register_codec(dev, &hdmi_codec, hcp->daidrv,
dai_count);
if (ret) {
@@ -468,12 +552,19 @@ static int hdmi_codec_probe(struct platform_device *pdev)
return ret;
}
- dev_set_drvdata(dev, hcp);
+ hcp->dev = dev;
+
return 0;
}
static int hdmi_codec_remove(struct platform_device *pdev)
{
+ struct hdmi_codec_priv *hcp = platform_get_drvdata(pdev);
+
+ if (hcp->notifier) {
+ hdmi_notifier_unregister(hcp->notifier, &hcp->nb);
+ hdmi_notifier_put(hcp->notifier);
+ }
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
--
2.10.2
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