diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-11 20:32:31 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-11 20:32:31 +0100 |
commit | 4417967bf2479020652049155c11a2d5b3a0136e (patch) | |
tree | d62cd882cf03486c8c7bb24524be0e13664b1822 /include | |
parent | 9481caf39bf55a862067007ffc53621b4305a387 (diff) | |
parent | 8857c7d065e900a0b3829c97634c99501b606541 (diff) |
Merge tag 'topic/component-typed-2019-02-11' of git://anongit.freedesktop.org/drm/drm-intel into driver-core-next
Daniel writes:
typed componented support + i915/snd-hda changes
This is needed by the new MEI-HDCP support in i915, so will need to go
in through drm and drivers-misc trees at least.
* tag 'topic/component-typed-2019-02-11' of git://anongit.freedesktop.org/drm/drm-intel:
i915/snd_hdac: I915 subcomponent for the snd_hdac
components: multiple components for a device
component: Add documentation
Diffstat (limited to 'include')
-rw-r--r-- | include/drm/i915_component.h | 4 | ||||
-rw-r--r-- | include/linux/component.h | 76 | ||||
-rw-r--r-- | include/sound/hda_component.h | 5 |
3 files changed, 83 insertions, 2 deletions
diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h index fca22d463e1b..72fbb037f9b3 100644 --- a/include/drm/i915_component.h +++ b/include/drm/i915_component.h @@ -26,6 +26,10 @@ #include "drm_audio_component.h" +enum i915_component_type { + I915_COMPONENT_AUDIO = 1, +}; + /* MAX_PORT is the number of port * It must be sync with I915_MAX_PORTS defined i915_drv.h */ diff --git a/include/linux/component.h b/include/linux/component.h index e71fbbbc74e2..30bcc7e590eb 100644 --- a/include/linux/component.h +++ b/include/linux/component.h @@ -4,16 +4,38 @@ #include <linux/stddef.h> + struct device; +/** + * struct component_ops - callbacks for component drivers + * + * Components are registered with component_add() and unregistered with + * component_del(). + */ struct component_ops { + /** + * @bind: + * + * Called through component_bind_all() when the aggregate driver is + * ready to bind the overall driver. + */ int (*bind)(struct device *comp, struct device *master, void *master_data); + /** + * @unbind: + * + * Called through component_unbind_all() when the aggregate driver is + * ready to bind the overall driver, or when component_bind_all() fails + * part-ways through and needs to unbind some already bound components. + */ void (*unbind)(struct device *comp, struct device *master, void *master_data); }; int component_add(struct device *, const struct component_ops *); +int component_add_typed(struct device *dev, const struct component_ops *ops, + int subcomponent); void component_del(struct device *, const struct component_ops *); int component_bind_all(struct device *master, void *master_data); @@ -21,8 +43,42 @@ void component_unbind_all(struct device *master, void *master_data); struct master; +/** + * struct component_master_ops - callback for the aggregate driver + * + * Aggregate drivers are registered with component_master_add_with_match() and + * unregistered with component_master_del(). + */ struct component_master_ops { + /** + * @bind: + * + * Called when all components or the aggregate driver, as specified in + * the match list passed to component_master_add_with_match(), are + * ready. Usually there are 3 steps to bind an aggregate driver: + * + * 1. Allocate a structure for the aggregate driver. + * + * 2. Bind all components to the aggregate driver by calling + * component_bind_all() with the aggregate driver structure as opaque + * pointer data. + * + * 3. Register the aggregate driver with the subsystem to publish its + * interfaces. + * + * Note that the lifetime of the aggregate driver does not align with + * any of the underlying &struct device instances. Therefore devm cannot + * be used and all resources acquired or allocated in this callback must + * be explicitly released in the @unbind callback. + */ int (*bind)(struct device *master); + /** + * @unbind: + * + * Called when either the aggregate driver, using + * component_master_del(), or one of its components, using + * component_del(), is unregistered. + */ void (*unbind)(struct device *master); }; @@ -37,7 +93,27 @@ void component_match_add_release(struct device *master, struct component_match **matchptr, void (*release)(struct device *, void *), int (*compare)(struct device *, void *), void *compare_data); +void component_match_add_typed(struct device *master, + struct component_match **matchptr, + int (*compare_typed)(struct device *, int, void *), void *compare_data); +/** + * component_match_add - add a compent match + * @master: device with the aggregate driver + * @matchptr: pointer to the list of component matches + * @compare: compare function to match against all components + * @compare_data: opaque pointer passed to the @compare function + * + * Adds a new component match to the list stored in @matchptr, which the @master + * aggregate driver needs to function. The list of component matches pointed to + * by @matchptr must be initialized to NULL before adding the first match. This + * only matches against components added with component_add(). + * + * The allocated match list in @matchptr is automatically released using devm + * actions. + * + * See also component_match_add_release() and component_match_add_typed(). + */ static inline void component_match_add(struct device *master, struct component_match **matchptr, int (*compare)(struct device *, void *), void *compare_data) diff --git a/include/sound/hda_component.h b/include/sound/hda_component.h index 2ec31b358950..d4804c72d959 100644 --- a/include/sound/hda_component.h +++ b/include/sound/hda_component.h @@ -20,7 +20,7 @@ int snd_hdac_acomp_get_eld(struct hdac_device *codec, hda_nid_t nid, int dev_id, bool *audio_enabled, char *buffer, int max_bytes); int snd_hdac_acomp_init(struct hdac_bus *bus, const struct drm_audio_component_audio_ops *aops, - int (*match_master)(struct device *, void *), + int (*match_master)(struct device *, int, void *), size_t extra_size); int snd_hdac_acomp_exit(struct hdac_bus *bus); int snd_hdac_acomp_register_notifier(struct hdac_bus *bus, @@ -47,7 +47,8 @@ static inline int snd_hdac_acomp_get_eld(struct hdac_device *codec, hda_nid_t ni } static inline int snd_hdac_acomp_init(struct hdac_bus *bus, const struct drm_audio_component_audio_ops *aops, - int (*match_master)(struct device *, void *), + int (*match_master)(struct device *, + int, void *), size_t extra_size) { return -ENODEV; |