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. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEb4nG6jLu8Y5XI+PfTA9ye/CYqnEFAlxhq5IACgkQTA9ye/CY qnE09xAAmLh7Jap/OizQOGdPvoPqH1n64sf36hmGuEbKSeZBasUc7ZP75FIBY/pr +y6oGLjRxYdvzVg8UJrNV4jDzyClgeeA9WyVEmEVwppgZGxXKNfCWRU/qB5zhhoA 3+SbnV6HuFOAem/nCqQHuEqUv0aF+8QGi8ifcUIVqgraDPNjcmFezj8naGq/3cS6 moFhHNIKsDdBctOk8R+cYe+hhPbNlzfvt5Kd9j0ksjDrQdf/kCWhOZ1YGfYAGqvY cXzjd4DA/5Gjh1afz1KIxB3TOEDSEWGYm3/QJo2U+pwqRglO39ky5vhL3yIjwwrt mvztd45rD9/+IoCyfT5DFJ7KkHRi9omT1OtVS/ndRoPFg3Uvt5k6J0Skz5KP1Nkr DeY3JT4CxKPl2//5p8cFexn+F8rd5uRE2y/Qb36I5GOIqj5etmZM2U+kI2c1mRDp Iiqci/7AhuvGofoTUzK3DvMAM/+zC9mptNA+g+eW63muqazwRCy2ZGqSe2/MXA18 739GoGllnYexQR9cJrqgMUUJZVcWvJJvadmScONxRfidQhqKeiCplLpPDNTZyhH6 58njXhfNS2BXGoOpFtgEmBaGpbTcEI2ZoBR/3U34L1Iial+Wo073RmOKRxtStaV8 uTefSKHhp50i9Qp5h3xfu0ySTWI/mtNGaqOHkRQYE5Dnl//9cBs= =IhHa -----END PGP SIGNATURE----- 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
This commit is contained in:
commit
4417967bf2
17
Documentation/driver-api/component.rst
Normal file
17
Documentation/driver-api/component.rst
Normal file
|
@ -0,0 +1,17 @@
|
|||
======================================
|
||||
Component Helper for Aggregate Drivers
|
||||
======================================
|
||||
|
||||
.. kernel-doc:: drivers/base/component.c
|
||||
:doc: overview
|
||||
|
||||
|
||||
API
|
||||
===
|
||||
|
||||
.. kernel-doc:: include/linux/component.h
|
||||
:internal:
|
||||
|
||||
.. kernel-doc:: drivers/base/component.c
|
||||
:export:
|
||||
|
|
@ -1,6 +1,9 @@
|
|||
.. |struct dev_pm_domain| replace:: :c:type:`struct dev_pm_domain <dev_pm_domain>`
|
||||
.. |struct generic_pm_domain| replace:: :c:type:`struct generic_pm_domain <generic_pm_domain>`
|
||||
|
||||
|
||||
.. _device_link:
|
||||
|
||||
============
|
||||
Device links
|
||||
============
|
||||
|
|
|
@ -22,6 +22,7 @@ available subsections can be seen below.
|
|||
device_connection
|
||||
dma-buf
|
||||
device_link
|
||||
component
|
||||
message-based
|
||||
sound
|
||||
frame-buffer
|
||||
|
|
|
@ -16,11 +16,38 @@
|
|||
#include <linux/slab.h>
|
||||
#include <linux/debugfs.h>
|
||||
|
||||
/**
|
||||
* DOC: overview
|
||||
*
|
||||
* The component helper allows drivers to collect a pile of sub-devices,
|
||||
* including their bound drivers, into an aggregate driver. Various subsystems
|
||||
* already provide functions to get hold of such components, e.g.
|
||||
* of_clk_get_by_name(). The component helper can be used when such a
|
||||
* subsystem-specific way to find a device is not available: The component
|
||||
* helper fills the niche of aggregate drivers for specific hardware, where
|
||||
* further standardization into a subsystem would not be practical. The common
|
||||
* example is when a logical device (e.g. a DRM display driver) is spread around
|
||||
* the SoC on various component (scanout engines, blending blocks, transcoders
|
||||
* for various outputs and so on).
|
||||
*
|
||||
* The component helper also doesn't solve runtime dependencies, e.g. for system
|
||||
* suspend and resume operations. See also :ref:`device links<device_link>`.
|
||||
*
|
||||
* Components are registered using component_add() and unregistered with
|
||||
* component_del(), usually from the driver's probe and disconnect functions.
|
||||
*
|
||||
* Aggregate drivers first assemble a component match list of what they need
|
||||
* using component_match_add(). This is then registered as an aggregate driver
|
||||
* using component_master_add_with_match(), and unregistered using
|
||||
* component_master_del().
|
||||
*/
|
||||
|
||||
struct component;
|
||||
|
||||
struct component_match_array {
|
||||
void *data;
|
||||
int (*compare)(struct device *, void *);
|
||||
int (*compare_typed)(struct device *, int, void *);
|
||||
void (*release)(struct device *, void *);
|
||||
struct component *component;
|
||||
bool duplicate;
|
||||
|
@ -48,6 +75,7 @@ struct component {
|
|||
bool bound;
|
||||
|
||||
const struct component_ops *ops;
|
||||
int subcomponent;
|
||||
struct device *dev;
|
||||
};
|
||||
|
||||
|
@ -132,7 +160,7 @@ static struct master *__master_find(struct device *dev,
|
|||
}
|
||||
|
||||
static struct component *find_component(struct master *master,
|
||||
int (*compare)(struct device *, void *), void *compare_data)
|
||||
struct component_match_array *mc)
|
||||
{
|
||||
struct component *c;
|
||||
|
||||
|
@ -140,7 +168,11 @@ static struct component *find_component(struct master *master,
|
|||
if (c->master && c->master != master)
|
||||
continue;
|
||||
|
||||
if (compare(c->dev, compare_data))
|
||||
if (mc->compare && mc->compare(c->dev, mc->data))
|
||||
return c;
|
||||
|
||||
if (mc->compare_typed &&
|
||||
mc->compare_typed(c->dev, c->subcomponent, mc->data))
|
||||
return c;
|
||||
}
|
||||
|
||||
|
@ -166,7 +198,7 @@ static int find_components(struct master *master)
|
|||
if (match->compare[i].component)
|
||||
continue;
|
||||
|
||||
c = find_component(master, mc->compare, mc->data);
|
||||
c = find_component(master, mc);
|
||||
if (!c) {
|
||||
ret = -ENXIO;
|
||||
break;
|
||||
|
@ -301,15 +333,12 @@ static int component_match_realloc(struct device *dev,
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Add a component to be matched, with a release function.
|
||||
*
|
||||
* The match array is first created or extended if necessary.
|
||||
*/
|
||||
void component_match_add_release(struct device *master,
|
||||
static void __component_match_add(struct device *master,
|
||||
struct component_match **matchptr,
|
||||
void (*release)(struct device *, void *),
|
||||
int (*compare)(struct device *, void *), void *compare_data)
|
||||
int (*compare)(struct device *, void *),
|
||||
int (*compare_typed)(struct device *, int, void *),
|
||||
void *compare_data)
|
||||
{
|
||||
struct component_match *match = *matchptr;
|
||||
|
||||
|
@ -341,13 +370,69 @@ void component_match_add_release(struct device *master,
|
|||
}
|
||||
|
||||
match->compare[match->num].compare = compare;
|
||||
match->compare[match->num].compare_typed = compare_typed;
|
||||
match->compare[match->num].release = release;
|
||||
match->compare[match->num].data = compare_data;
|
||||
match->compare[match->num].component = NULL;
|
||||
match->num++;
|
||||
}
|
||||
|
||||
/**
|
||||
* component_match_add_release - add a component match with release callback
|
||||
* @master: device with the aggregate driver
|
||||
* @matchptr: pointer to the list of component matches
|
||||
* @release: release function for @compare_data
|
||||
* @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, where upon @release will be called to free any references held by
|
||||
* @compare_data, e.g. when @compare_data is a &device_node that must be
|
||||
* released with of_node_put().
|
||||
*
|
||||
* See also component_match_add() and component_match_add_typed().
|
||||
*/
|
||||
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)
|
||||
{
|
||||
__component_match_add(master, matchptr, release, compare, NULL,
|
||||
compare_data);
|
||||
}
|
||||
EXPORT_SYMBOL(component_match_add_release);
|
||||
|
||||
/**
|
||||
* component_match_add_typed - add a compent match for a typed component
|
||||
* @master: device with the aggregate driver
|
||||
* @matchptr: pointer to the list of component matches
|
||||
* @compare_typed: compare function to match against all typed 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_typed().
|
||||
*
|
||||
* The allocated match list in @matchptr is automatically released using devm
|
||||
* actions.
|
||||
*
|
||||
* See also component_match_add_release() and component_match_add_typed().
|
||||
*/
|
||||
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(master, matchptr, NULL, NULL, compare_typed,
|
||||
compare_data);
|
||||
}
|
||||
EXPORT_SYMBOL(component_match_add_typed);
|
||||
|
||||
static void free_master(struct master *master)
|
||||
{
|
||||
struct component_match *match = master->match;
|
||||
|
@ -367,6 +452,18 @@ static void free_master(struct master *master)
|
|||
kfree(master);
|
||||
}
|
||||
|
||||
/**
|
||||
* component_master_add_with_match - register an aggregate driver
|
||||
* @dev: device with the aggregate driver
|
||||
* @ops: callbacks for the aggregate driver
|
||||
* @match: component match list for the aggregate driver
|
||||
*
|
||||
* Registers a new aggregate driver consisting of the components added to @match
|
||||
* by calling one of the component_match_add() functions. Once all components in
|
||||
* @match are available, it will be assembled by calling
|
||||
* &component_master_ops.bind from @ops. Must be unregistered by calling
|
||||
* component_master_del().
|
||||
*/
|
||||
int component_master_add_with_match(struct device *dev,
|
||||
const struct component_master_ops *ops,
|
||||
struct component_match *match)
|
||||
|
@ -403,6 +500,15 @@ int component_master_add_with_match(struct device *dev,
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(component_master_add_with_match);
|
||||
|
||||
/**
|
||||
* component_master_del - unregister an aggregate driver
|
||||
* @dev: device with the aggregate driver
|
||||
* @ops: callbacks for the aggregate driver
|
||||
*
|
||||
* Unregisters an aggregate driver registered with
|
||||
* component_master_add_with_match(). If necessary the aggregate driver is first
|
||||
* disassembled by calling &component_master_ops.unbind from @ops.
|
||||
*/
|
||||
void component_master_del(struct device *dev,
|
||||
const struct component_master_ops *ops)
|
||||
{
|
||||
|
@ -430,6 +536,15 @@ static void component_unbind(struct component *component,
|
|||
devres_release_group(component->dev, component);
|
||||
}
|
||||
|
||||
/**
|
||||
* component_unbind_all - unbind all component to an aggregate driver
|
||||
* @master_dev: device with the aggregate driver
|
||||
* @data: opaque pointer, passed to all components
|
||||
*
|
||||
* Unbinds all components to the aggregate @dev by passing @data to their
|
||||
* &component_ops.unbind functions. Should be called from
|
||||
* &component_master_ops.unbind.
|
||||
*/
|
||||
void component_unbind_all(struct device *master_dev, void *data)
|
||||
{
|
||||
struct master *master;
|
||||
|
@ -503,6 +618,15 @@ static int component_bind(struct component *component, struct master *master,
|
|||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* component_bind_all - bind all component to an aggregate driver
|
||||
* @master_dev: device with the aggregate driver
|
||||
* @data: opaque pointer, passed to all components
|
||||
*
|
||||
* Binds all components to the aggregate @dev by passing @data to their
|
||||
* &component_ops.bind functions. Should be called from
|
||||
* &component_master_ops.bind.
|
||||
*/
|
||||
int component_bind_all(struct device *master_dev, void *data)
|
||||
{
|
||||
struct master *master;
|
||||
|
@ -537,7 +661,8 @@ int component_bind_all(struct device *master_dev, void *data)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(component_bind_all);
|
||||
|
||||
int component_add(struct device *dev, const struct component_ops *ops)
|
||||
static int __component_add(struct device *dev, const struct component_ops *ops,
|
||||
int subcomponent)
|
||||
{
|
||||
struct component *component;
|
||||
int ret;
|
||||
|
@ -548,6 +673,7 @@ int component_add(struct device *dev, const struct component_ops *ops)
|
|||
|
||||
component->ops = ops;
|
||||
component->dev = dev;
|
||||
component->subcomponent = subcomponent;
|
||||
|
||||
dev_dbg(dev, "adding component (ops %ps)\n", ops);
|
||||
|
||||
|
@ -566,8 +692,66 @@ int component_add(struct device *dev, const struct component_ops *ops)
|
|||
|
||||
return ret < 0 ? ret : 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* component_add_typed - register a component
|
||||
* @dev: component device
|
||||
* @ops: component callbacks
|
||||
* @subcomponent: nonzero identifier for subcomponents
|
||||
*
|
||||
* Register a new component for @dev. Functions in @ops will be call when the
|
||||
* aggregate driver is ready to bind the overall driver by calling
|
||||
* component_bind_all(). See also &struct component_ops.
|
||||
*
|
||||
* @subcomponent must be nonzero and is used to differentiate between multiple
|
||||
* components registerd on the same device @dev. These components are match
|
||||
* using component_match_add_typed().
|
||||
*
|
||||
* The component needs to be unregistered at driver unload/disconnect by
|
||||
* calling component_del().
|
||||
*
|
||||
* See also component_add().
|
||||
*/
|
||||
int component_add_typed(struct device *dev, const struct component_ops *ops,
|
||||
int subcomponent)
|
||||
{
|
||||
if (WARN_ON(subcomponent == 0))
|
||||
return -EINVAL;
|
||||
|
||||
return __component_add(dev, ops, subcomponent);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(component_add_typed);
|
||||
|
||||
/**
|
||||
* component_add - register a component
|
||||
* @dev: component device
|
||||
* @ops: component callbacks
|
||||
*
|
||||
* Register a new component for @dev. Functions in @ops will be called when the
|
||||
* aggregate driver is ready to bind the overall driver by calling
|
||||
* component_bind_all(). See also &struct component_ops.
|
||||
*
|
||||
* The component needs to be unregistered at driver unload/disconnect by
|
||||
* calling component_del().
|
||||
*
|
||||
* See also component_add_typed() for a variant that allows multipled different
|
||||
* components on the same device.
|
||||
*/
|
||||
int component_add(struct device *dev, const struct component_ops *ops)
|
||||
{
|
||||
return __component_add(dev, ops, 0);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(component_add);
|
||||
|
||||
/**
|
||||
* component_del - unregister a component
|
||||
* @dev: component device
|
||||
* @ops: component callbacks
|
||||
*
|
||||
* Unregister a component added with component_add(). If the component is bound
|
||||
* into an aggregate driver, this will force the entire aggregate driver, including
|
||||
* all its components, to be unbound.
|
||||
*/
|
||||
void component_del(struct device *dev, const struct component_ops *ops)
|
||||
{
|
||||
struct component *c, *component = NULL;
|
||||
|
|
|
@ -984,7 +984,9 @@ void i915_audio_component_init(struct drm_i915_private *dev_priv)
|
|||
{
|
||||
int ret;
|
||||
|
||||
ret = component_add(dev_priv->drm.dev, &i915_audio_component_bind_ops);
|
||||
ret = component_add_typed(dev_priv->drm.dev,
|
||||
&i915_audio_component_bind_ops,
|
||||
I915_COMPONENT_AUDIO);
|
||||
if (ret < 0) {
|
||||
DRM_ERROR("failed to add audio component (%d)\n", ret);
|
||||
/* continue with reduced functionality */
|
||||
|
|
|
@ -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
|
||||
*/
|
||||
|
|
|
@ -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)
|
||||
|
|
|
@ -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;
|
||||
|
|
|
@ -269,7 +269,7 @@ EXPORT_SYMBOL_GPL(snd_hdac_acomp_register_notifier);
|
|||
*/
|
||||
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)
|
||||
{
|
||||
struct component_match *match = NULL;
|
||||
|
@ -288,7 +288,7 @@ int snd_hdac_acomp_init(struct hdac_bus *bus,
|
|||
bus->audio_component = acomp;
|
||||
devres_add(dev, acomp);
|
||||
|
||||
component_match_add(dev, &match, match_master, bus);
|
||||
component_match_add_typed(dev, &match, match_master, bus);
|
||||
ret = component_master_add_with_match(dev, &hdac_component_master_ops,
|
||||
match);
|
||||
if (ret < 0)
|
||||
|
|
|
@ -82,9 +82,11 @@ void snd_hdac_i915_set_bclk(struct hdac_bus *bus)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(snd_hdac_i915_set_bclk);
|
||||
|
||||
static int i915_component_master_match(struct device *dev, void *data)
|
||||
static int i915_component_master_match(struct device *dev, int subcomponent,
|
||||
void *data)
|
||||
{
|
||||
return !strcmp(dev->driver->name, "i915");
|
||||
return !strcmp(dev->driver->name, "i915") &&
|
||||
subcomponent == I915_COMPONENT_AUDIO;
|
||||
}
|
||||
|
||||
/* check whether intel graphics is present */
|
||||
|
|
Loading…
Reference in a new issue