v4.19.13 snapshot.
diff --git a/include/drm/drm_audio_component.h b/include/drm/drm_audio_component.h
new file mode 100644
index 0000000..4923b00
--- /dev/null
+++ b/include/drm/drm_audio_component.h
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2014 Intel Corporation
+
+#ifndef _DRM_AUDIO_COMPONENT_H_
+#define _DRM_AUDIO_COMPONENT_H_
+
+struct drm_audio_component;
+
+/**
+ * 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.
+ */
+ void (*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 *);
+ /**
+ * @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_ */