On 4/1/19 12:50 AM, libin.yang@intel.com wrote:
From: Libin Yang libin.yang@intel.com
HDMI audio codec register operation depends on the display audio power domain. The hdmi audio codec dapm event callback must be called after display audio power is turned on.
Add hdac_hdmi_device_link_add() in HDMI audio codec driver. The customer audio driver, such as cAVS/SST and SOF audio driver, can call the function to set the audio power dependency.
Signed-off-by: Libin Yang libin.yang@intel.com
sound/soc/codecs/hdac_hdmi.c | 12 ++++++++++++ sound/soc/codecs/hdac_hdmi.h | 6 ++++++ 2 files changed, 18 insertions(+)
diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c index 5eeb0fe..c991407 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -1792,6 +1792,18 @@ int hdac_hdmi_jack_init(struct snd_soc_dai *dai, int device, } EXPORT_SYMBOL_GPL(hdac_hdmi_jack_init);
+struct device_link * +hdac_hdmi_device_link_add(struct device *consumer,
struct snd_soc_component *component,u32 flags)+{
- struct hdac_hdmi_priv *hdmi = snd_soc_component_get_drvdata(component);
- struct hdac_device *hdev = hdmi->hdev;
- return device_link_add(consumer, &hdev->dev, flags);
Don't you need a matching device_link_free() to avoid a memory leak?
Also what would be the expectations for the flags and do you really want the consumer to set them?
And last, without a patch of the cAVS driver it's hard to see how this might be used.
+} +EXPORT_SYMBOL_GPL(hdac_hdmi_device_link_add);
- static void hdac_hdmi_present_sense_all_pins(struct hdac_device *hdev, struct hdac_hdmi_priv *hdmi, bool detect_pin_caps) {
diff --git a/sound/soc/codecs/hdac_hdmi.h b/sound/soc/codecs/hdac_hdmi.h index 4fa2fc9..9239c6b 100644 --- a/sound/soc/codecs/hdac_hdmi.h +++ b/sound/soc/codecs/hdac_hdmi.h @@ -7,4 +7,10 @@ int hdac_hdmi_jack_init(struct snd_soc_dai *dai, int pcm,
int hdac_hdmi_jack_port_init(struct snd_soc_component *component, struct snd_soc_dapm_context *dapm);
+struct device_link * +hdac_hdmi_device_link_add(struct device *consumer,
struct snd_soc_component *component,u32 flags);- #endif /* __HDAC_HDMI_H__ */