2 * Copyright © 2014 Intel Corporation
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24 #ifndef _I915_COMPONENT_H_
25 #define _I915_COMPONENT_H_
27 /* MAX_PORT is the number of port
28 * It must be sync with I915_MAX_PORTS defined i915_drv.h
33 * struct i915_audio_component_ops - Ops implemented by i915 driver, called by hda driver
35 struct i915_audio_component_ops {
41 * @get_power: get the POWER_DOMAIN_AUDIO power well
43 * Request the power well to be turned on.
45 void (*get_power)(struct device *);
47 * @put_power: put the POWER_DOMAIN_AUDIO power well
49 * Allow the power well to be turned off.
51 void (*put_power)(struct device *);
53 * @codec_wake_override: Enable/disable codec wake signal
55 void (*codec_wake_override)(struct device *, bool enable);
57 * @get_cdclk_freq: Get the Core Display Clock in kHz
59 int (*get_cdclk_freq)(struct device *);
61 * @sync_audio_rate: set n/cts based on the sample rate
63 * Called from audio driver. After audio driver sets the
64 * sample rate, it will call this function to set n/cts
66 int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
68 * @get_eld: fill the audio state and ELD bytes for the given port
70 * Called from audio driver to get the HDMI/DP audio state of the given
71 * digital port, and also fetch ELD bytes to the given pointer.
73 * It returns the byte size of the original ELD (not the actually
74 * copied size), zero for an invalid ELD, or a negative error code.
76 * Note that the returned size may be over @max_bytes. Then it
77 * implies that only a part of ELD has been copied to the buffer.
79 int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
80 unsigned char *buf, int max_bytes);
84 * struct i915_audio_component_audio_ops - Ops implemented by hda driver, called by i915 driver
86 struct i915_audio_component_audio_ops {
88 * @audio_ptr: Pointer to be used in call to pin_eld_notify
92 * @pin_eld_notify: Notify the HDA driver that pin sense and/or ELD information has changed
94 * Called when the i915 driver has set up audio pipeline or has just
95 * begun to tear it down. This allows the HDA driver to update its
96 * status accordingly (even when the HDA controller is in power save
99 void (*pin_eld_notify)(void *audio_ptr, int port, int pipe);
103 * struct i915_audio_component - Used for direct communication between i915 and hda drivers
105 struct i915_audio_component {
107 * @dev: i915 device, used as parameter for ops
111 * @aud_sample_rate: the array of audio sample rate per port
113 int aud_sample_rate[MAX_PORTS];
115 * @ops: Ops implemented by i915 driver, called by hda driver
117 const struct i915_audio_component_ops *ops;
119 * @audio_ops: Ops implemented by hda driver, called by i915 driver
121 const struct i915_audio_component_audio_ops *audio_ops;
124 #endif /* _I915_COMPONENT_H_ */