2 * Copyright © 2014 Intel Corporation
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5 * copy of this software and associated documentation files (the "Software"),
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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
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24 #ifndef _I915_COMPONENT_H_
25 #define _I915_COMPONENT_H_
27 #include <linux/device.h>
29 /* MAX_PORT is the number of port
30 * It must be sync with I915_MAX_PORTS defined i915_drv.h
31 * 5 should be enough as only HSW, BDW, SKL need such fix.
36 * struct i915_audio_component_ops - Ops implemented by i915 driver, called by hda driver
38 struct i915_audio_component_ops {
44 * @get_power: get the POWER_DOMAIN_AUDIO power well
46 * Request the power well to be turned on.
48 void (*get_power)(struct device *);
50 * @put_power: put the POWER_DOMAIN_AUDIO power well
52 * Allow the power well to be turned off.
54 void (*put_power)(struct device *);
56 * @codec_wake_override: Enable/disable codec wake signal
58 void (*codec_wake_override)(struct device *, bool enable);
60 * @get_cdclk_freq: Get the Core Display Clock in kHz
62 int (*get_cdclk_freq)(struct device *);
64 * @sync_audio_rate: set n/cts based on the sample rate
66 * Called from audio driver. After audio driver sets the
67 * sample rate, it will call this function to set n/cts
69 int (*sync_audio_rate)(struct device *, int port, int rate);
71 * @get_eld: fill the audio state and ELD bytes for the given port
73 * Called from audio driver to get the HDMI/DP audio state of the given
74 * digital port, and also fetch ELD bytes to the given pointer.
76 * It returns the byte size of the original ELD (not the actually
77 * copied size), zero for an invalid ELD, or a negative error code.
79 * Note that the returned size may be over @max_bytes. Then it
80 * implies that only a part of ELD has been copied to the buffer.
82 int (*get_eld)(struct device *, int port, bool *enabled,
83 unsigned char *buf, int max_bytes);
87 * struct i915_audio_component_audio_ops - Ops implemented by hda driver, called by i915 driver
89 struct i915_audio_component_audio_ops {
91 * @audio_ptr: Pointer to be used in call to pin_eld_notify
95 * @pin_eld_notify: Notify the HDA driver that pin sense and/or ELD information has changed
97 * Called when the i915 driver has set up audio pipeline or has just
98 * begun to tear it down. This allows the HDA driver to update its
99 * status accordingly (even when the HDA controller is in power save
102 void (*pin_eld_notify)(void *audio_ptr, int port);
106 * struct i915_audio_component - Used for direct communication between i915 and hda drivers
108 struct i915_audio_component {
110 * @dev: i915 device, used as parameter for ops
114 * @aud_sample_rate: the array of audio sample rate per port
116 int aud_sample_rate[MAX_PORTS];
118 * @ops: Ops implemented by i915 driver, called by hda driver
120 const struct i915_audio_component_ops *ops;
122 * @audio_ops: Ops implemented by hda driver, called by i915 driver
124 const struct i915_audio_component_audio_ops *audio_ops;
127 #endif /* _I915_COMPONENT_H_ */