diff options
| -rw-r--r-- | Documentation/driver-api/component.rst | 17 | ||||
| -rw-r--r-- | Documentation/driver-api/device_link.rst | 3 | ||||
| -rw-r--r-- | Documentation/driver-api/index.rst | 1 | ||||
| -rw-r--r-- | drivers/base/component.c | 206 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_audio.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.h | 16 | ||||
| -rw-r--r-- | include/drm/drm_audio_component.h | 1 | ||||
| -rw-r--r-- | include/drm/drm_hdcp.h | 18 | ||||
| -rw-r--r-- | include/drm/i915_component.h | 5 | ||||
| -rw-r--r-- | include/drm/i915_drm.h | 15 | ||||
| -rw-r--r-- | include/drm/i915_mei_hdcp_interface.h | 149 | ||||
| -rw-r--r-- | include/linux/component.h | 76 | ||||
| -rw-r--r-- | include/sound/hda_component.h | 5 | ||||
| -rw-r--r-- | sound/hda/hdac_component.c | 4 | ||||
| -rw-r--r-- | sound/hda/hdac_i915.c | 6 |
15 files changed, 493 insertions, 33 deletions
diff --git a/Documentation/driver-api/component.rst b/Documentation/driver-api/component.rst new file mode 100644 index 000000000000..2da4a8f20607 --- /dev/null +++ b/Documentation/driver-api/component.rst @@ -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: + diff --git a/Documentation/driver-api/device_link.rst b/Documentation/driver-api/device_link.rst index d6763272e747..2d5919b2b337 100644 --- a/Documentation/driver-api/device_link.rst +++ b/Documentation/driver-api/device_link.rst @@ -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 ============ diff --git a/Documentation/driver-api/index.rst b/Documentation/driver-api/index.rst index ab38ced66a44..c0b600ed9961 100644 --- a/Documentation/driver-api/index.rst +++ b/Documentation/driver-api/index.rst @@ -22,6 +22,7 @@ available subsections can be seen below. device_connection dma-buf device_link + component message-based sound frame-buffer diff --git a/drivers/base/component.c b/drivers/base/component.c index ddcea8739c12..7dbc41cccd58 100644 --- a/drivers/base/component.c +++ b/drivers/base/component.c @@ -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; diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c index 32dfd41a93ed..502b57ce72ab 100644 --- a/drivers/gpu/drm/i915/intel_audio.c +++ b/drivers/gpu/drm/i915/intel_audio.c @@ -989,7 +989,9 @@ 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 */ diff --git a/drivers/gpu/drm/i915/intel_display.h b/drivers/gpu/drm/i915/intel_display.h index c7c068662288..2220588e86ac 100644 --- a/drivers/gpu/drm/i915/intel_display.h +++ b/drivers/gpu/drm/i915/intel_display.h @@ -26,6 +26,7 @@ #define _INTEL_DISPLAY_H_ #include <drm/drm_util.h> +#include <drm/i915_drm.h> enum i915_gpio { GPIOA, @@ -150,21 +151,6 @@ enum plane_id { for ((__p) = PLANE_PRIMARY; (__p) < I915_MAX_PLANES; (__p)++) \ for_each_if((__crtc)->plane_ids_mask & BIT(__p)) -enum port { - PORT_NONE = -1, - - PORT_A = 0, - PORT_B, - PORT_C, - PORT_D, - PORT_E, - PORT_F, - - I915_MAX_PORTS -}; - -#define port_name(p) ((p) + 'A') - /* * Ports identifier referenced from other drivers. * Expected to remain stable over time diff --git a/include/drm/drm_audio_component.h b/include/drm/drm_audio_component.h index d0c7444319f5..a45f93487039 100644 --- a/include/drm/drm_audio_component.h +++ b/include/drm/drm_audio_component.h @@ -5,6 +5,7 @@ #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 diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index d6dfef8cff6a..7260b31af276 100644 --- a/include/drm/drm_hdcp.h +++ b/include/drm/drm_hdcp.h @@ -252,4 +252,22 @@ struct hdcp2_dp_errata_stream_type { #define HDCP_2_2_HDMI_RXSTATUS_READY(x) ((x) & BIT(2)) #define HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(x) ((x) & BIT(3)) +/* + * Helper functions to convert 24bit big endian hdcp sequence number to + * host format and back + */ +static inline +u32 drm_hdcp2_seq_num_to_u32(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN]) +{ + return (u32)(seq_num[2] | seq_num[1] << 8 | seq_num[0] << 16); +} + +static inline +void drm_hdcp2_u32_to_seq_num(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN], u32 val) +{ + seq_num[0] = val >> 16; + seq_num[1] = val >> 8; + seq_num[2] = val; +} + #endif diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h index fca22d463e1b..dcb95bd9dee6 100644 --- a/include/drm/i915_component.h +++ b/include/drm/i915_component.h @@ -26,6 +26,11 @@ #include "drm_audio_component.h" +enum i915_component_type { + I915_COMPONENT_AUDIO = 1, + I915_COMPONENT_HDCP, +}; + /* MAX_PORT is the number of port * It must be sync with I915_MAX_PORTS defined i915_drv.h */ diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h index c44703f471b3..7523e9a7b6e2 100644 --- a/include/drm/i915_drm.h +++ b/include/drm/i915_drm.h @@ -100,4 +100,19 @@ extern struct resource intel_graphics_stolen_res; #define INTEL_GEN11_BSM_DW1 0xc4 #define INTEL_BSM_MASK (-(1u << 20)) +enum port { + PORT_NONE = -1, + + PORT_A = 0, + PORT_B, + PORT_C, + PORT_D, + PORT_E, + PORT_F, + + I915_MAX_PORTS +}; + +#define port_name(p) ((p) + 'A') + #endif /* _I915_DRM_H_ */ diff --git a/include/drm/i915_mei_hdcp_interface.h b/include/drm/i915_mei_hdcp_interface.h new file mode 100644 index 000000000000..8c344255146a --- /dev/null +++ b/include/drm/i915_mei_hdcp_interface.h @@ -0,0 +1,149 @@ +/* SPDX-License-Identifier: (GPL-2.0+) */ +/* + * Copyright © 2017-2018 Intel Corporation + * + * Authors: + * Ramalingam C <ramalingam.c@intel.com> + */ + +#ifndef _I915_MEI_HDCP_INTERFACE_H_ +#define _I915_MEI_HDCP_INTERFACE_H_ + +#include <linux/mutex.h> +#include <linux/device.h> +#include <drm/drm_hdcp.h> +#include <drm/i915_drm.h> + +/** + * enum hdcp_port_type - HDCP port implementation type defined by ME FW + * @HDCP_PORT_TYPE_INVALID: Invalid hdcp port type + * @HDCP_PORT_TYPE_INTEGRATED: In-Host HDCP2.x port + * @HDCP_PORT_TYPE_LSPCON: HDCP2.2 discrete wired Tx port with LSPCON + * (HDMI 2.0) solution + * @HDCP_PORT_TYPE_CPDP: HDCP2.2 discrete wired Tx port using the CPDP (DP 1.3) + * solution + */ +enum hdcp_port_type { + HDCP_PORT_TYPE_INVALID, + HDCP_PORT_TYPE_INTEGRATED, + HDCP_PORT_TYPE_LSPCON, + HDCP_PORT_TYPE_CPDP +}; + +/** + * enum hdcp_wired_protocol - HDCP adaptation used on the port + * @HDCP_PROTOCOL_INVALID: Invalid HDCP adaptation protocol + * @HDCP_PROTOCOL_HDMI: HDMI adaptation of HDCP used on the port + * @HDCP_PROTOCOL_DP: DP adaptation of HDCP used on the port + */ +enum hdcp_wired_protocol { + HDCP_PROTOCOL_INVALID, + HDCP_PROTOCOL_HDMI, + HDCP_PROTOCOL_DP +}; + +/** + * struct hdcp_port_data - intel specific HDCP port data + * @port: port index as per I915 + * @port_type: HDCP port type as per ME FW classification + * @protocol: HDCP adaptation as per ME FW + * @k: No of streams transmitted on a port. Only on DP MST this is != 1 + * @seq_num_m: Count of RepeaterAuth_Stream_Manage msg propagated. + * Initialized to 0 on AKE_INIT. Incremented after every successful + * transmission of RepeaterAuth_Stream_Manage message. When it rolls + * over re-Auth has to be triggered. + * @streams: struct hdcp2_streamid_type[k]. Defines the type and id for the + * streams + */ +struct hdcp_port_data { + enum port port; + u8 port_type; + u8 protocol; + u16 k; + u32 seq_num_m; + struct hdcp2_streamid_type *streams; +}; + +/** + * struct i915_hdcp_component_ops- ops for HDCP2.2 services. + * @owner: Module providing the ops + * @initiate_hdcp2_session: Initiate a Wired HDCP2.2 Tx Session. + * And Prepare AKE_Init. + * @verify_receiver_cert_prepare_km: Verify the Receiver Certificate + * AKE_Send_Cert and prepare + AKE_Stored_Km/AKE_No_Stored_Km + * @verify_hprime: Verify AKE_Send_H_prime + * @store_pairing_info: Store pairing info received + * @initiate_locality_check: Prepare LC_Init + * @verify_lprime: Verify lprime + * @get_session_key: Prepare SKE_Send_Eks + * @repeater_check_flow_prepare_ack: Validate the Downstream topology + * and prepare rep_ack + * @verify_mprime: Verify mprime + * @enable_hdcp_authentication: Mark a port as authenticated. + * @close_hdcp_session: Close the Wired HDCP Tx session per port. + * This also disables the authenticated state of the port. + */ +struct i915_hdcp_component_ops { + /** + * @owner: mei_hdcp module + */ + struct module *owner; + + int (*initiate_hdcp2_session)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_ake_init *ake_data); + int (*verify_receiver_cert_prepare_km)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_ake_send_cert + *rx_cert, + bool *km_stored, + struct hdcp2_ake_no_stored_km + *ek_pub_km, + size_t *msg_sz); + int (*verify_hprime)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_ake_send_hprime *rx_hprime); + int (*store_pairing_info)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_ake_send_pairing_info + *pairing_info); + int (*initiate_locality_check)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_lc_init *lc_init_data); + int (*verify_lprime)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_lc_send_lprime *rx_lprime); + int (*get_session_key)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_ske_send_eks *ske_data); + int (*repeater_check_flow_prepare_ack)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_rep_send_receiverid_list + *rep_topology, + struct hdcp2_rep_send_ack + *rep_send_ack); + int (*verify_mprime)(struct device *dev, + struct hdcp_port_data *data, + struct hdcp2_rep_stream_ready *stream_ready); + int (*enable_hdcp_authentication)(struct device *dev, + struct hdcp_port_data *data); + int (*close_hdcp_session)(struct device *dev, + struct hdcp_port_data *data); +}; + +/** + * struct i915_hdcp_component_master - Used for communication between i915 + * and mei_hdcp drivers for the HDCP2.2 services + * @mei_dev: device that provide the HDCP2.2 service from MEI Bus. + * @hdcp_ops: Ops implemented by mei_hdcp driver, used by i915 driver. + */ +struct i915_hdcp_comp_master { + struct device *mei_dev; + const struct i915_hdcp_component_ops *ops; + + /* To protect the above members. */ + struct mutex mutex; +}; + +#endif /* _I915_MEI_HDCP_INTERFACE_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; diff --git a/sound/hda/hdac_component.c b/sound/hda/hdac_component.c index 2702548b788a..13915fdc6a54 100644 --- a/sound/hda/hdac_component.c +++ b/sound/hda/hdac_component.c @@ -275,7 +275,7 @@ 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; @@ -294,7 +294,7 @@ 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) diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c index 617ff1aa818f..7aee090e3d27 100644 --- a/sound/hda/hdac_i915.c +++ b/sound/hda/hdac_i915.c @@ -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 */ |