ASoC: SOF: Intel: refactor i915_get/put functions

The current interface to control i915 display power is misleading.
The hda_codec_i915_get() and hda_codec_i915_put() names suggest
a refcounting based interface. This is confusing as no refcounting
is done and the underlying HDAC library interface does not support
refcounts eithers.

Clarify the code by replacing the functions with a single
hda_codec_i915_display_power() that is aligned with
snd_hdac_display_power().
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200120160117.29130-2-kai.vehmanen@linux.intel.comAcked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/intel/hda-codec.c

@@ -170,23 +170,14 @@ EXPORT_SYMBOL_NS(hda_codec_probe_bus, SND_SOC_SOF_HDA_AUDIO_CODEC);
 #if IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) || \
 	IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI)
 
-void hda_codec_i915_get(struct snd_sof_dev *sdev)
+void hda_codec_i915_display_power(struct snd_sof_dev *sdev, bool enable)
 {
 	struct hdac_bus *bus = sof_to_bus(sdev);
 
-	dev_dbg(bus->dev, "Turning i915 HDAC power on\n");
-	snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, true);
+	dev_dbg(bus->dev, "Turning i915 HDAC power %d\n", enable);
+	snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, enable);
 }
-EXPORT_SYMBOL_NS(hda_codec_i915_get, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
-
-void hda_codec_i915_put(struct snd_sof_dev *sdev)
-{
-	struct hdac_bus *bus = sof_to_bus(sdev);
-
-	dev_dbg(bus->dev, "Turning i915 HDAC power off\n");
-	snd_hdac_display_power(bus, HDA_CODEC_IDX_CONTROLLER, false);
-}
-EXPORT_SYMBOL_NS(hda_codec_i915_put, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
+EXPORT_SYMBOL_NS(hda_codec_i915_display_power, SND_SOC_SOF_HDA_AUDIO_CODEC_I915);
 
 int hda_codec_i915_init(struct snd_sof_dev *sdev)
 {
@@ -198,7 +189,7 @@ int hda_codec_i915_init(struct snd_sof_dev *sdev)
 	if (ret < 0)
 		return ret;
 
-	hda_codec_i915_get(sdev);
+	hda_codec_i915_display_power(sdev, true);
 
 	return 0;
 }
@@ -209,7 +200,7 @@ int hda_codec_i915_exit(struct snd_sof_dev *sdev)
 	struct hdac_bus *bus = sof_to_bus(sdev);
 	int ret;
 
-	hda_codec_i915_put(sdev);
+	hda_codec_i915_display_power(sdev, false);
 
 	ret = snd_hdac_i915_exit(bus);
 

sound/soc/sof/intel/hda.c

@@ -380,7 +380,7 @@ static int hda_init_caps(struct snd_sof_dev *sdev)
 	/* create codec instances */
 	hda_codec_probe_bus(sdev, hda_codec_use_common_hdmi);
 
-	hda_codec_i915_put(sdev);
+	hda_codec_i915_display_power(sdev, false);
 
 	/*
 	 * we are done probing so decrement link counts

sound/soc/sof/intel/hda.h

@@ -586,15 +586,14 @@ void hda_codec_jack_check(struct snd_sof_dev *sdev);
 	(IS_ENABLED(CONFIG_SND_HDA_CODEC_HDMI) || \
 	 IS_ENABLED(CONFIG_SND_SOC_HDAC_HDMI))
 
-void hda_codec_i915_get(struct snd_sof_dev *sdev);
-void hda_codec_i915_put(struct snd_sof_dev *sdev);
+void hda_codec_i915_display_power(struct snd_sof_dev *sdev, bool enable);
 int hda_codec_i915_init(struct snd_sof_dev *sdev);
 int hda_codec_i915_exit(struct snd_sof_dev *sdev);
 
 #else
 
-static inline void hda_codec_i915_get(struct snd_sof_dev *sdev)  { }
-static inline void hda_codec_i915_put(struct snd_sof_dev *sdev)  { }
+static inline void hda_codec_i915_display_power(struct snd_sof_dev *sdev,
+						bool enable) { }
 static inline int hda_codec_i915_init(struct snd_sof_dev *sdev) { return 0; }
 static inline int hda_codec_i915_exit(struct snd_sof_dev *sdev) { return 0; }