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authorTakashi Iwai <tiwai@suse.de>2018-07-11 16:23:16 +0200
committerTakashi Iwai <tiwai@suse.de>2018-07-17 22:25:48 +0200
commita57942bfdd61b46df94021c9c33b8faaae5b65e1 (patch)
treeb07a8f8c109a0101230fce793dc186d10e0d172e /include/drm/drm_audio_component.h
parent82887c0beb1ee6b33eed8318d8e8d41c5b3eddae (diff)
downloadlinux-a57942bfdd61b46df94021c9c33b8faaae5b65e1.tar.bz2
ALSA: hda: Make audio component support more generic
This is the final step for more generic support of DRM audio component. The generic audio component code is now moved to its own file, and the symbols are renamed from snd_hac_i915_* to snd_hdac_acomp_*, respectively. The generic code is enabled via the new kconfig, CONFIG_SND_HDA_COMPONENT, while CONFIG_SND_HDA_I915 is kept as the super-class. Along with the split, three new callbacks are added to audio_ops: pin2port is for providing the conversion between the pin number and the widget id, and master_bind/master_unbin are called at binding / unbinding the master component, respectively. All these are optional, but used in i915 implementation and also other later implementations. A note about the new snd_hdac_acomp_init() function: there is a slight difference between this and the old snd_hdac_i915_init(). The latter (still) synchronizes with the master component binding, i.e. it assures that the relevant DRM component gets bound when it returns, or gives a negative error. Meanwhile the new function doesn't synchronize but just leaves as is. It's the responsibility by the caller's side to synchronize, or the caller may accept the asynchronous binding on the fly. v1->v2: Fix missing NULL check in master_bind/unbind Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/drm/drm_audio_component.h')
-rw-r--r--include/drm/drm_audio_component.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/drm/drm_audio_component.h b/include/drm/drm_audio_component.h
index e85689f212c2..4923b00328c1 100644
--- a/include/drm/drm_audio_component.h
+++ b/include/drm/drm_audio_component.h
@@ -4,6 +4,8 @@
#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
*/
@@ -72,6 +74,27 @@ struct drm_audio_component_audio_ops {
* 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 *);
};
/**