drm/i915: Improve kernel-doc for i915_audio_component struct

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1444987464-8657-1-git-send-email-david.henningsson@canonical.comSigned-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

include/drm/i915_component.h

@@ -31,47 +31,80 @@
 #define MAX_PORTS 5
 
 /**
- * struct i915_audio_component_ops - callbacks defined in gfx driver
- * @owner: the module owner
- * @get_power: get the POWER_DOMAIN_AUDIO power well
- * @put_power: put the POWER_DOMAIN_AUDIO power well
- * @codec_wake_override: Enable/Disable generating the codec wake signal
- * @get_cdclk_freq: get the Core Display Clock in KHz
- * @sync_audio_rate: set n/cts based on the sample rate
+ * struct i915_audio_component_ops - Ops implemented by i915 driver, called by hda driver
  */
 struct i915_audio_component_ops {
+	/**
+	 * @owner: i915 module
+	 */
 	struct module *owner;
+	/**
+	 * @get_power: get the POWER_DOMAIN_AUDIO power well
+	 *
+	 * Request the power well to be turned on.
+	 */
 	void (*get_power)(struct device *);
+	/**
+	 * @put_power: put the POWER_DOMAIN_AUDIO power well
+	 *
+	 * Allow the power well to be turned off.
+	 */
 	void (*put_power)(struct device *);
+	/**
+	 * @codec_wake_override: Enable/disable codec wake signal
+	 */
 	void (*codec_wake_override)(struct device *, bool enable);
+	/**
+	 * @get_cdclk_freq: Get the Core Display Clock in kHz
+	 */
 	int (*get_cdclk_freq)(struct device *);
+	/**
+	 * @sync_audio_rate: set n/cts based on the sample rate
+	 *
+	 * Called from audio driver. After audio driver sets the
+	 * sample rate, it will call this function to set n/cts
+	 */
 	int (*sync_audio_rate)(struct device *, int port, int rate);
 };
 
+/**
+ * struct i915_audio_component_audio_ops - Ops implemented by hda driver, called by i915 driver
+ */
 struct i915_audio_component_audio_ops {
+	/**
+	 * @audio_ptr: Pointer to be used in call to pin_eld_notify
+	 */
 	void *audio_ptr;
 	/**
-	 * Call from i915 driver, notifying the HDA driver that
-	 * pin sense and/or ELD information has changed.
-	 * @audio_ptr:		HDA driver object
-	 * @port:	Which port has changed (PORTA / PORTB / PORTC etc)
+	 * @pin_eld_notify: Notify the HDA driver that pin sense and/or ELD information has changed
+	 *
+	 * Called when the i915 driver has set up audio pipeline or has just
+	 * begun to tear it down. This allows the HDA driver to update its
+	 * status accordingly (even when the HDA controller is in power save
+	 * mode).
 	 */
 	void (*pin_eld_notify)(void *audio_ptr, int port);
 };
 
 /**
- * struct i915_audio_component - used for audio video interaction
- * @dev: the device from gfx driver
- * @aud_sample_rate: the array of audio sample rate per port
- * @ops: callback for audio driver calling
- * @audio_ops: Call from i915 driver
+ * struct i915_audio_component - Used for direct communication between i915 and hda drivers
  */
 struct i915_audio_component {
+	/**
+	 * @dev: i915 device, used as parameter for ops
+	 */
 	struct device *dev;
+	/**
+	 * @aud_sample_rate: the array of audio sample rate per port
+	 */
 	int aud_sample_rate[MAX_PORTS];
-
+	/**
+	 * @ops: Ops implemented by i915 driver, called by hda driver
+	 */
 	const struct i915_audio_component_ops *ops;
-
+	/**
+	 * @audio_ops: Ops implemented by hda driver, called by i915 driver
+	 */
 	const struct i915_audio_component_audio_ops *audio_ops;
 };