| // SPDX-License-Identifier: MIT |
| // Copyright © 2014 Intel Corporation |
| |
| #ifndef _DRM_AUDIO_COMPONENT_H_ |
| #define _DRM_AUDIO_COMPONENT_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; |
| }; |
| |
| #endif /* _DRM_AUDIO_COMPONENT_H_ */ |