cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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drm_audio_component.h (3879B)

      1// SPDX-License-Identifier: MIT
      2// Copyright © 2014 Intel Corporation
      3
      4#ifndef _DRM_AUDIO_COMPONENT_H_
      5#define _DRM_AUDIO_COMPONENT_H_
      6
      7struct drm_audio_component;
      8struct device;
      9
     10/**
     11 * struct drm_audio_component_ops - Ops implemented by DRM driver, called by hda driver
     12 */
     13struct drm_audio_component_ops {
     14	/**
     15	 * @owner: drm module to pin down
     16	 */
     17	struct module *owner;
     18	/**
     19	 * @get_power: get the POWER_DOMAIN_AUDIO power well
     20	 *
     21	 * Request the power well to be turned on.
     22	 *
     23	 * Returns a wakeref cookie to be passed back to the corresponding
     24	 * call to @put_power.
     25	 */
     26	unsigned long (*get_power)(struct device *);
     27	/**
     28	 * @put_power: put the POWER_DOMAIN_AUDIO power well
     29	 *
     30	 * Allow the power well to be turned off.
     31	 */
     32	void (*put_power)(struct device *, unsigned long);
     33	/**
     34	 * @codec_wake_override: Enable/disable codec wake signal
     35	 */
     36	void (*codec_wake_override)(struct device *, bool enable);
     37	/**
     38	 * @get_cdclk_freq: Get the Core Display Clock in kHz
     39	 */
     40	int (*get_cdclk_freq)(struct device *);
     41	/**
     42	 * @sync_audio_rate: set n/cts based on the sample rate
     43	 *
     44	 * Called from audio driver. After audio driver sets the
     45	 * sample rate, it will call this function to set n/cts
     46	 */
     47	int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
     48	/**
     49	 * @get_eld: fill the audio state and ELD bytes for the given port
     50	 *
     51	 * Called from audio driver to get the HDMI/DP audio state of the given
     52	 * digital port, and also fetch ELD bytes to the given pointer.
     53	 *
     54	 * It returns the byte size of the original ELD (not the actually
     55	 * copied size), zero for an invalid ELD, or a negative error code.
     56	 *
     57	 * Note that the returned size may be over @max_bytes.  Then it
     58	 * implies that only a part of ELD has been copied to the buffer.
     59	 */
     60	int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
     61		       unsigned char *buf, int max_bytes);
     62};
     63
     64/**
     65 * struct drm_audio_component_audio_ops - Ops implemented by hda driver, called by DRM driver
     66 */
     67struct drm_audio_component_audio_ops {
     68	/**
     69	 * @audio_ptr: Pointer to be used in call to pin_eld_notify
     70	 */
     71	void *audio_ptr;
     72	/**
     73	 * @pin_eld_notify: Notify the HDA driver that pin sense and/or ELD information has changed
     74	 *
     75	 * Called when the DRM driver has set up audio pipeline or has just
     76	 * begun to tear it down. This allows the HDA driver to update its
     77	 * status accordingly (even when the HDA controller is in power save
     78	 * mode).
     79	 */
     80	void (*pin_eld_notify)(void *audio_ptr, int port, int pipe);
     81	/**
     82	 * @pin2port: Check and convert from pin node to port number
     83	 *
     84	 * Called by HDA driver to check and convert from the pin widget node
     85	 * number to a port number in the graphics side.
     86	 */
     87	int (*pin2port)(void *audio_ptr, int pin);
     88	/**
     89	 * @master_bind: (Optional) component master bind callback
     90	 *
     91	 * Called at binding master component, for HDA codec-specific
     92	 * handling of dynamic binding.
     93	 */
     94	int (*master_bind)(struct device *dev, struct drm_audio_component *);
     95	/**
     96	 * @master_unbind: (Optional) component master unbind callback
     97	 *
     98	 * Called at unbinding master component, for HDA codec-specific
     99	 * handling of dynamic unbinding.
    100	 */
    101	void (*master_unbind)(struct device *dev, struct drm_audio_component *);
    102};
    103
    104/**
    105 * struct drm_audio_component - Used for direct communication between DRM and hda drivers
    106 */
    107struct drm_audio_component {
    108	/**
    109	 * @dev: DRM device, used as parameter for ops
    110	 */
    111	struct device *dev;
    112	/**
    113	 * @ops: Ops implemented by DRM driver, called by hda driver
    114	 */
    115	const struct drm_audio_component_ops *ops;
    116	/**
    117	 * @audio_ops: Ops implemented by hda driver, called by DRM driver
    118	 */
    119	const struct drm_audio_component_audio_ops *audio_ops;
    120	/**
    121	 * @master_bind_complete: completion held during component master binding
    122	 */
    123	struct completion master_bind_complete;
    124};
    125
    126#endif /* _DRM_AUDIO_COMPONENT_H_ */