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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
122#endif /* _DRM_AUDIO_COMPONENT_H_ */
1// SPDX-License-Identifier: MIT
2// Copyright © 2014 Intel Corporation
3
4#ifndef _DRM_AUDIO_COMPONENT_H_
5#define _DRM_AUDIO_COMPONENT_H_
6
7#include <linux/completion.h>
8#include <linux/types.h>
9
10struct drm_audio_component;
11struct device;
12
13/**
14 * struct drm_audio_component_ops - Ops implemented by DRM driver, called by hda driver
15 */
16struct drm_audio_component_ops {
17 /**
18 * @owner: drm module to pin down
19 */
20 struct module *owner;
21 /**
22 * @get_power: get the POWER_DOMAIN_AUDIO power well
23 *
24 * Request the power well to be turned on.
25 *
26 * Returns a wakeref cookie to be passed back to the corresponding
27 * call to @put_power.
28 */
29 unsigned long (*get_power)(struct device *);
30 /**
31 * @put_power: put the POWER_DOMAIN_AUDIO power well
32 *
33 * Allow the power well to be turned off.
34 */
35 void (*put_power)(struct device *, unsigned long);
36 /**
37 * @codec_wake_override: Enable/disable codec wake signal
38 */
39 void (*codec_wake_override)(struct device *, bool enable);
40 /**
41 * @get_cdclk_freq: Get the Core Display Clock in kHz
42 */
43 int (*get_cdclk_freq)(struct device *);
44 /**
45 * @sync_audio_rate: set n/cts based on the sample rate
46 *
47 * Called from audio driver. After audio driver sets the
48 * sample rate, it will call this function to set n/cts
49 */
50 int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
51 /**
52 * @get_eld: fill the audio state and ELD bytes for the given port
53 *
54 * Called from audio driver to get the HDMI/DP audio state of the given
55 * digital port, and also fetch ELD bytes to the given pointer.
56 *
57 * It returns the byte size of the original ELD (not the actually
58 * copied size), zero for an invalid ELD, or a negative error code.
59 *
60 * Note that the returned size may be over @max_bytes. Then it
61 * implies that only a part of ELD has been copied to the buffer.
62 */
63 int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
64 unsigned char *buf, int max_bytes);
65};
66
67/**
68 * struct drm_audio_component_audio_ops - Ops implemented by hda driver, called by DRM driver
69 */
70struct drm_audio_component_audio_ops {
71 /**
72 * @audio_ptr: Pointer to be used in call to pin_eld_notify
73 */
74 void *audio_ptr;
75 /**
76 * @pin_eld_notify: Notify the HDA driver that pin sense and/or ELD information has changed
77 *
78 * Called when the DRM driver has set up audio pipeline or has just
79 * begun to tear it down. This allows the HDA driver to update its
80 * status accordingly (even when the HDA controller is in power save
81 * mode).
82 */
83 void (*pin_eld_notify)(void *audio_ptr, int port, int pipe);
84 /**
85 * @pin2port: Check and convert from pin node to port number
86 *
87 * Called by HDA driver to check and convert from the pin widget node
88 * number to a port number in the graphics side.
89 */
90 int (*pin2port)(void *audio_ptr, int pin);
91 /**
92 * @master_bind: (Optional) component master bind callback
93 *
94 * Called at binding master component, for HDA codec-specific
95 * handling of dynamic binding.
96 */
97 int (*master_bind)(struct device *dev, struct drm_audio_component *);
98 /**
99 * @master_unbind: (Optional) component master unbind callback
100 *
101 * Called at unbinding master component, for HDA codec-specific
102 * handling of dynamic unbinding.
103 */
104 void (*master_unbind)(struct device *dev, struct drm_audio_component *);
105};
106
107/**
108 * struct drm_audio_component - Used for direct communication between DRM and hda drivers
109 */
110struct drm_audio_component {
111 /**
112 * @dev: DRM device, used as parameter for ops
113 */
114 struct device *dev;
115 /**
116 * @ops: Ops implemented by DRM driver, called by hda driver
117 */
118 const struct drm_audio_component_ops *ops;
119 /**
120 * @audio_ops: Ops implemented by hda driver, called by DRM driver
121 */
122 const struct drm_audio_component_audio_ops *audio_ops;
123 /**
124 * @master_bind_complete: completion held during component master binding
125 */
126 struct completion master_bind_complete;
127};
128
129#endif /* _DRM_AUDIO_COMPONENT_H_ */