// SPDX-License-Identifier: MIT// Copyright © 2014 Intel Corporation #ifndef _DRM_AUDIO_COMPONENT_H_#define _DRM_AUDIO_COMPONENT_H_ #include <linux/completion.h>#include <linux/types.h> struct drm_audio_component;struct device; /** * struct drm_audio_component_ops - Ops implemented by DRM driver, called by hda driver */struct drm_audio_component_ops {	/**	 * @owner: drm module to pin down	 */	struct module *owner;	/**	 * @get_power: get the POWER_DOMAIN_AUDIO power well	 *	 * Request the power well to be turned on.	 *	 * Returns a wakeref cookie to be passed back to the corresponding	 * call to @put_power.	 */	unsigned long (*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 *, unsigned long);	/**	 * @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 pipe, int rate);	/**	 * @get_eld: fill the audio state and ELD bytes for the given port	 *	 * Called from audio driver to get the HDMI/DP audio state of the given	 * digital port, and also fetch ELD bytes to the given pointer.	 *	 * It returns the byte size of the original ELD (not the actually	 * copied size), zero for an invalid ELD, or a negative error code.	 *	 * Note that the returned size may be over @max_bytes.  Then it	 * implies that only a part of ELD has been copied to the buffer.	 */	int (*get_eld)(struct device *, int port, int pipe, bool *enabled,		       unsigned char *buf, int max_bytes);}; /** * struct drm_audio_component_audio_ops - Ops implemented by hda driver, called by DRM driver */struct drm_audio_component_audio_ops {	/**	 * @audio_ptr: Pointer to be used in call to pin_eld_notify	 */	void *audio_ptr;	/**	 * @pin_eld_notify: Notify the HDA driver that pin sense and/or ELD information has changed	 *	 * Called when the DRM 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, int pipe);	/**	 * @pin2port: Check and convert from pin node to port number	 *	 * Called by HDA driver to check and convert from the pin widget node	 * number to a port number in the graphics side.	 */	int (*pin2port)(void *audio_ptr, int pin);	/**	 * @master_bind: (Optional) component master bind callback	 *	 * Called at binding master component, for HDA codec-specific	 * handling of dynamic binding.	 */	int (*master_bind)(struct device *dev, struct drm_audio_component *);	/**	 * @master_unbind: (Optional) component master unbind callback	 *	 * Called at unbinding master component, for HDA codec-specific	 * handling of dynamic unbinding.	 */	void (*master_unbind)(struct device *dev, struct drm_audio_component *);}; /** * struct drm_audio_component - Used for direct communication between DRM and hda drivers */struct drm_audio_component {	/**	 * @dev: DRM device, used as parameter for ops	 */	struct device *dev;	/**	 * @ops: Ops implemented by DRM driver, called by hda driver	 */	const struct drm_audio_component_ops *ops;	/**	 * @audio_ops: Ops implemented by hda driver, called by DRM driver	 */	const struct drm_audio_component_audio_ops *audio_ops;	/**	 * @master_bind_complete: completion held during component master binding	 */	struct completion master_bind_complete;}; #endif /* _DRM_AUDIO_COMPONENT_H_ */