ALSA: x86: Drop the global platform device reference

Instead of referring to the global hlpe_pdev variable, pass the
platform device object to each function properly.  Accessing to the
global object is really ugly and error-prone.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/x86/intel_hdmi_audio.c

@@ -172,11 +172,12 @@ int had_get_hwstate(struct snd_intelhad *intelhaddata)
 int had_get_caps(struct snd_intelhad *intelhaddata,
 		 enum had_caps_list query, void *caps)
 {
+	struct platform_device *pdev = to_platform_device(intelhaddata->dev);
 	int retval;
 
 	retval = had_get_hwstate(intelhaddata);
 	if (!retval)
-		retval = mid_hdmi_audio_get_caps(query, caps);
+		retval = mid_hdmi_audio_get_caps(pdev, query, caps);
 
 	return retval;
 }
@@ -184,33 +185,36 @@ int had_get_caps(struct snd_intelhad *intelhaddata,
 int had_set_caps(struct snd_intelhad *intelhaddata,
 		 enum had_caps_list set_element, void *caps)
 {
+	struct platform_device *pdev = to_platform_device(intelhaddata->dev);
 	int retval;
 
 	retval = had_get_hwstate(intelhaddata);
 	if (!retval)
-		retval = mid_hdmi_audio_set_caps(set_element, caps);
+		retval = mid_hdmi_audio_set_caps(pdev, set_element, caps);
 
 	return retval;
 }
 
 int had_read_register(struct snd_intelhad *intelhaddata, u32 offset, u32 *data)
 {
+	struct platform_device *pdev = to_platform_device(intelhaddata->dev);
 	int retval;
 
 	retval = had_get_hwstate(intelhaddata);
 	if (!retval)
-		retval = mid_hdmi_audio_read(offset, data);
+		retval = mid_hdmi_audio_read(pdev, offset, data);
 
 	return retval;
 }
 
 int had_write_register(struct snd_intelhad *intelhaddata, u32 offset, u32 data)
 {
+	struct platform_device *pdev = to_platform_device(intelhaddata->dev);
 	int retval;
 
 	retval = had_get_hwstate(intelhaddata);
 	if (!retval)
-		retval = mid_hdmi_audio_write(offset, data);
+		retval = mid_hdmi_audio_write(pdev, offset, data);
 
 	return retval;
 }
@@ -218,11 +222,12 @@ int had_write_register(struct snd_intelhad *intelhaddata, u32 offset, u32 data)
 int had_read_modify(struct snd_intelhad *intelhaddata, u32 offset,
 		    u32 data, u32 mask)
 {
+	struct platform_device *pdev = to_platform_device(intelhaddata->dev);
 	int retval;
 
 	retval = had_get_hwstate(intelhaddata);
 	if (!retval)
-		retval = mid_hdmi_audio_rmw(offset, data, mask);
+		retval = mid_hdmi_audio_rmw(pdev, offset, data, mask);
 
 	return retval;
 }

sound/x86/intel_hdmi_lpe_audio.h

@@ -31,6 +31,8 @@
 #include <sound/control.h>
 #include <sound/pcm.h>
 
+struct platform_device;
+
 #define AUD_CONFIG_VALID_BIT			(1<<9)
 #define AUD_CONFIG_DP_MODE			(1<<15)
 #define AUD_CONFIG_BLOCK_BIT			(1<<7)
@@ -642,15 +644,16 @@ struct hdmi_audio_event {
 	int type;
 };
 
-void mid_hdmi_audio_signal_event(enum had_event_type event);
-
-int mid_hdmi_audio_read(u32 reg, u32 *val);
-int mid_hdmi_audio_write(u32 reg, u32 val);
-int mid_hdmi_audio_rmw(u32 reg, u32 val, u32 mask);
+int mid_hdmi_audio_read(struct platform_device *pdev, u32 reg, u32 *val);
+int mid_hdmi_audio_write(struct platform_device *pdev, u32 reg, u32 val);
+int mid_hdmi_audio_rmw(struct platform_device *pdev,
+		       u32 reg, u32 val, u32 mask);
 
-int mid_hdmi_audio_get_caps(enum had_caps_list get_element,
+int mid_hdmi_audio_get_caps(struct platform_device *pdev,
+			    enum had_caps_list get_element,
 			    void *capabilities);
-int mid_hdmi_audio_set_caps(enum had_caps_list set_element,
+int mid_hdmi_audio_set_caps(struct platform_device *pdev,
+			    enum had_caps_list set_element,
 			    void *capabilties);
 
 #endif