Remove most references to 'master' in the code and replace them with some form of 'aggregate device'. This better reflects the reality of what this code does, i.e. an aggregate device that represents a device like a GPU card once some set of devices that make up the aggregate device probe and register with the component framework.

Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Laurent Pinchart laurent.pinchart@ideasonboard.com Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/base/component.c | 242 +++++++++++++++++++------------------- include/linux/component.h | 2 +- 2 files changed, 120 insertions(+), 124 deletions(-)

diff --git a/drivers/base/component.c b/drivers/base/component.c index 2d25a6416587..34f9e0802719 100644 --- a/drivers/base/component.c +++ b/drivers/base/component.c @@ -1,11 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* * Componentized device handling. - * - * This is work in progress. We gather up the component devices into a list, - * and bind them when instructed. At the moment, we're specific to the DRM - * subsystem, and only handles one master device, but this doesn't have to be - * the case. */ #include <linux/component.h> #include <linux/device.h> @@ -57,7 +52,7 @@ struct component_match { struct component_match_array *compare; };

-struct master { +struct aggregate_device { struct list_head node; bool bound;

@@ -68,7 +63,7 @@ struct master {

struct component { struct list_head node; - struct master *master; + struct aggregate_device *adev; bool bound;

const struct component_ops *ops; @@ -78,7 +73,7 @@ struct component {

static DEFINE_MUTEX(component_mutex); static LIST_HEAD(component_list); -static LIST_HEAD(masters); +static LIST_HEAD(aggregate_devices);

#ifdef CONFIG_DEBUG_FS

@@ -86,12 +81,12 @@ static struct dentry *component_debugfs_dir;

static int component_devices_show(struct seq_file *s, void *data) { - struct master *m = s->private; + struct aggregate_device *m = s->private; struct component_match *match = m->match; size_t i;

mutex_lock(&component_mutex); - seq_printf(s, "%-40s %20s\n", "master name", "status"); + seq_printf(s, "%-40s %20s\n", "aggregate_device name", "status"); seq_puts(s, "-------------------------------------------------------------\n"); seq_printf(s, "%-40s %20s\n\n", dev_name(m->parent), m->bound ? "bound" : "not bound"); @@ -121,46 +116,46 @@ static int __init component_debug_init(void)

core_initcall(component_debug_init);

-static void component_master_debugfs_add(struct master *m) +static void component_debugfs_add(struct aggregate_device *m) { debugfs_create_file(dev_name(m->parent), 0444, component_debugfs_dir, m, &component_devices_fops); }

-static void component_master_debugfs_del(struct master *m) +static void component_debugfs_del(struct aggregate_device *m) { debugfs_remove(debugfs_lookup(dev_name(m->parent), component_debugfs_dir)); }

#else

-static void component_master_debugfs_add(struct master *m) +static void component_debugfs_add(struct aggregate_device *m) { }

-static void component_master_debugfs_del(struct master *m) +static void component_debugfs_del(struct aggregate_device *m) { }

#endif

-static struct master *__master_find(struct device *parent, +static struct aggregate_device *__aggregate_find(struct device *parent, const struct component_master_ops *ops) { - struct master *m; + struct aggregate_device *m;

- list_for_each_entry(m, &masters, node) + list_for_each_entry(m, &aggregate_devices, node) if (m->parent == parent && (!ops || m->ops == ops)) return m;

return NULL; }

-static struct component *find_component(struct master *master, +static struct component *find_component(struct aggregate_device *adev, struct component_match_array *mc) { struct component *c;

list_for_each_entry(c, &component_list, node) { - if (c->master && c->master != master) + if (c->adev && c->adev != adev) continue;

if (mc->compare && mc->compare(c->dev, mc->data)) @@ -174,102 +169,103 @@ static struct component *find_component(struct master *master, return NULL; }

-static int find_components(struct master *master) +static int find_components(struct aggregate_device *adev) { - struct component_match *match = master->match; + struct component_match *match = adev->match; size_t i; int ret = 0;

/* * Scan the array of match functions and attach - * any components which are found to this master. + * any components which are found to this adev. */ for (i = 0; i < match->num; i++) { struct component_match_array *mc = &match->compare[i]; struct component *c;

- dev_dbg(master->parent, "Looking for component %zu\n", i); + dev_dbg(adev->parent, "Looking for component %zu\n", i);

if (match->compare[i].component) continue;

- c = find_component(master, mc); + c = find_component(adev, mc); if (!c) { ret = -ENXIO; break; }

- dev_dbg(master->parent, "found component %s, duplicate %u\n", dev_name(c->dev), !!c->master); + dev_dbg(adev->parent, "found component %s, duplicate %u\n", + dev_name(c->dev), !!c->adev);

- /* Attach this component to the master */ - match->compare[i].duplicate = !!c->master; + /* Attach this component to the adev */ + match->compare[i].duplicate = !!c->adev; match->compare[i].component = c; - c->master = master; + c->adev = adev; } return ret; }

-/* Detach component from associated master */ -static void remove_component(struct master *master, struct component *c) +/* Detach component from associated aggregate_device */ +static void remove_component(struct aggregate_device *adev, struct component *c) { size_t i;

- /* Detach the component from this master. */ - for (i = 0; i < master->match->num; i++) - if (master->match->compare[i].component == c) - master->match->compare[i].component = NULL; + /* Detach the component from this adev. */ + for (i = 0; i < adev->match->num; i++) + if (adev->match->compare[i].component == c) + adev->match->compare[i].component = NULL; }

/* - * Try to bring up a master. If component is NULL, we're interested in - * this master, otherwise it's a component which must be present to try - * and bring up the master. + * Try to bring up an aggregate device. If component is NULL, we're interested + * in this aggregate device, otherwise it's a component which must be present + * to try and bring up the aggregate device. * * Returns 1 for successful bringup, 0 if not ready, or -ve errno. */ -static int try_to_bring_up_master(struct master *master, +static int try_to_bring_up_aggregate_device(struct aggregate_device *adev, struct component *component) { int ret;

- dev_dbg(master->parent, "trying to bring up master\n"); + dev_dbg(adev->parent, "trying to bring up adev\n");

- if (find_components(master)) { - dev_dbg(master->parent, "master has incomplete components\n"); + if (find_components(adev)) { + dev_dbg(adev->parent, "master has incomplete components\n"); return 0; }

- if (component && component->master != master) { - dev_dbg(master->parent, "master is not for this component (%s)\n", + if (component && component->adev != adev) { + dev_dbg(adev->parent, "master is not for this component (%s)\n", dev_name(component->dev)); return 0; }

- if (!devres_open_group(master->parent, master, GFP_KERNEL)) + if (!devres_open_group(adev->parent, adev, GFP_KERNEL)) return -ENOMEM;

/* Found all components */ - ret = master->ops->bind(master->parent); + ret = adev->ops->bind(adev->parent); if (ret < 0) { - devres_release_group(master->parent, NULL); + devres_release_group(adev->parent, NULL); if (ret != -EPROBE_DEFER) - dev_info(master->parent, "master bind failed: %d\n", ret); + dev_info(adev->parent, "adev bind failed: %d\n", ret); return ret; }

- devres_close_group(master->parent, NULL); - master->bound = true; + devres_close_group(adev->parent, NULL); + adev->bound = true; return 1; }

static int try_to_bring_up_masters(struct component *component) { - struct master *m; + struct aggregate_device *adev; int ret = 0;

- list_for_each_entry(m, &masters, node) { - if (!m->bound) { - ret = try_to_bring_up_master(m, component); + list_for_each_entry(adev, &aggregate_devices, node) { + if (!adev->bound) { + ret = try_to_bring_up_aggregate_device(adev, component); if (ret != 0) break; } @@ -278,12 +274,12 @@ static int try_to_bring_up_masters(struct component *component) return ret; }

-static void take_down_master(struct master *master) +static void take_down_aggregate_device(struct aggregate_device *adev) { - if (master->bound) { - master->ops->unbind(master->parent); - devres_release_group(master->parent, master); - master->bound = false; + if (adev->bound) { + adev->ops->unbind(adev->parent); + devres_release_group(adev->parent, adev); + adev->bound = false; } }

@@ -324,7 +320,7 @@ static int component_match_realloc(struct component_match *match, size_t num) return 0; }

-static void __component_match_add(struct device *master, +static void __component_match_add(struct device *parent, struct component_match **matchptr, void (*release)(struct device *, void *), int (*compare)(struct device *, void *), @@ -344,7 +340,7 @@ static void __component_match_add(struct device *master, return; }

- devres_add(master, match); + devres_add(parent, match);

*matchptr = match; } @@ -370,13 +366,13 @@ static void __component_match_add(struct device *master,

/** * component_match_add_release - add a component match entry with release callback - * @master: device with the aggregate driver + * @parent: parent device of 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 + * Adds a new component match to the list stored in @matchptr, which the * 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(). @@ -388,24 +384,24 @@ static void __component_match_add(struct device *master, * * See also component_match_add() and component_match_add_typed(). */ -void component_match_add_release(struct device *master, +void component_match_add_release(struct device *parent, 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, + __component_match_add(parent, matchptr, release, compare, NULL, compare_data); } EXPORT_SYMBOL(component_match_add_release);

/** * component_match_add_typed - add a component match entry for a typed component - * @master: device with the aggregate driver + * @parent: parent device of 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 + * Adds a new component match to the list stored in @matchptr, which the * 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(). @@ -415,32 +411,32 @@ EXPORT_SYMBOL(component_match_add_release); * * See also component_match_add_release() and component_match_add_typed(). */ -void component_match_add_typed(struct device *master, +void component_match_add_typed(struct device *parent, struct component_match **matchptr, int (*compare_typed)(struct device *, int, void *), void *compare_data) { - __component_match_add(master, matchptr, NULL, NULL, compare_typed, + __component_match_add(parent, matchptr, NULL, NULL, compare_typed, compare_data); } EXPORT_SYMBOL(component_match_add_typed);

-static void free_master(struct master *master) +static void free_aggregate_device(struct aggregate_device *adev) { - struct component_match *match = master->match; + struct component_match *match = adev->match; int i;

- component_master_debugfs_del(master); - list_del(&master->node); + component_debugfs_del(adev); + list_del(&adev->node);

if (match) { for (i = 0; i < match->num; i++) { struct component *c = match->compare[i].component; if (c) - c->master = NULL; + c->adev = NULL; } }

- kfree(master); + kfree(adev); }

/** @@ -459,7 +455,7 @@ int component_master_add_with_match(struct device *parent, const struct component_master_ops *ops, struct component_match *match) { - struct master *master; + struct aggregate_device *adev; int ret;

/* Reallocate the match array for its true size */ @@ -467,23 +463,23 @@ int component_master_add_with_match(struct device *parent, if (ret) return ret;

- master = kzalloc(sizeof(*master), GFP_KERNEL); - if (!master) + adev = kzalloc(sizeof(*adev), GFP_KERNEL); + if (!adev) return -ENOMEM;

- master->parent = parent; - master->ops = ops; - master->match = match; + adev->parent = parent; + adev->ops = ops; + adev->match = match;

- component_master_debugfs_add(master); - /* Add to the list of available masters. */ + component_debugfs_add(adev); + /* Add to the list of available aggregate devices. */ mutex_lock(&component_mutex); - list_add(&master->node, &masters); + list_add(&adev->node, &aggregate_devices);

- ret = try_to_bring_up_master(master, NULL); + ret = try_to_bring_up_aggregate_device(adev, NULL);

if (ret < 0) - free_master(master); + free_aggregate_device(adev);

mutex_unlock(&component_mutex);

@@ -503,25 +499,25 @@ EXPORT_SYMBOL_GPL(component_master_add_with_match); void component_master_del(struct device *parent, const struct component_master_ops *ops) { - struct master *master; + struct aggregate_device *adev;

mutex_lock(&component_mutex); - master = __master_find(parent, ops); - if (master) { - take_down_master(master); - free_master(master); + adev = __aggregate_find(parent, ops); + if (adev) { + take_down_aggregate_device(adev); + free_aggregate_device(adev); } mutex_unlock(&component_mutex); } EXPORT_SYMBOL_GPL(component_master_del);

static void component_unbind(struct component *component, - struct master *master, void *data) + struct aggregate_device *adev, void *data) { WARN_ON(!component->bound);

if (component->ops && component->ops->unbind) - component->ops->unbind(component->dev, master->parent, data); + component->ops->unbind(component->dev, adev->parent, data); component->bound = false;

/* Release all resources claimed in the binding of this component */ @@ -539,26 +535,26 @@ static void component_unbind(struct component *component, */ void component_unbind_all(struct device *parent, void *data) { - struct master *master; + struct aggregate_device *adev; struct component *c; size_t i;

WARN_ON(!mutex_is_locked(&component_mutex));

- master = __master_find(parent, NULL); - if (!master) + adev = __aggregate_find(parent, NULL); + if (!adev) return;

/* Unbind components in reverse order */ - for (i = master->match->num; i--; ) - if (!master->match->compare[i].duplicate) { - c = master->match->compare[i].component; - component_unbind(c, master, data); + for (i = adev->match->num; i--; ) + if (!adev->match->compare[i].duplicate) { + c = adev->match->compare[i].component; + component_unbind(c, adev, data); } } EXPORT_SYMBOL_GPL(component_unbind_all);

-static int component_bind(struct component *component, struct master *master, +static int component_bind(struct component *component, struct aggregate_device *adev, void *data) { int ret; @@ -568,7 +564,7 @@ static int component_bind(struct component *component, struct master *master, * This allows us to roll-back a failed component without * affecting anything else. */ - if (!devres_open_group(master->parent, NULL, GFP_KERNEL)) + if (!devres_open_group(adev->parent, NULL, GFP_KERNEL)) return -ENOMEM;

/* @@ -577,14 +573,14 @@ static int component_bind(struct component *component, struct master *master, * at the appropriate moment. */ if (!devres_open_group(component->dev, component, GFP_KERNEL)) { - devres_release_group(master->parent, NULL); + devres_release_group(adev->parent, NULL); return -ENOMEM; }

- dev_dbg(master->parent, "binding %s (ops %ps)\n", + dev_dbg(adev->parent, "binding %s (ops %ps)\n", dev_name(component->dev), component->ops);

- ret = component->ops->bind(component->dev, master->parent, data); + ret = component->ops->bind(component->dev, adev->parent, data); if (!ret) { component->bound = true;

@@ -595,16 +591,16 @@ static int component_bind(struct component *component, struct master *master, * can clean those resources up independently. */ devres_close_group(component->dev, NULL); - devres_remove_group(master->parent, NULL); + devres_remove_group(adev->parent, NULL);

- dev_info(master->parent, "bound %s (ops %ps)\n", + dev_info(adev->parent, "bound %s (ops %ps)\n", dev_name(component->dev), component->ops); } else { devres_release_group(component->dev, NULL); - devres_release_group(master->parent, NULL); + devres_release_group(adev->parent, NULL);

if (ret != -EPROBE_DEFER) - dev_err(master->parent, "failed to bind %s (ops %ps): %d\n", + dev_err(adev->parent, "failed to bind %s (ops %ps): %d\n", dev_name(component->dev), component->ops, ret); }

@@ -622,31 +618,31 @@ static int component_bind(struct component *component, struct master *master, */ int component_bind_all(struct device *parent, void *data) { - struct master *master; + struct aggregate_device *adev; struct component *c; size_t i; int ret = 0;

WARN_ON(!mutex_is_locked(&component_mutex));

- master = __master_find(parent, NULL); - if (!master) + adev = __aggregate_find(parent, NULL); + if (!adev) return -EINVAL;

/* Bind components in match order */ - for (i = 0; i < master->match->num; i++) - if (!master->match->compare[i].duplicate) { - c = master->match->compare[i].component; - ret = component_bind(c, master, data); + for (i = 0; i < adev->match->num; i++) + if (!adev->match->compare[i].duplicate) { + c = adev->match->compare[i].component; + ret = component_bind(c, adev, data); if (ret) break; }

if (ret != 0) { for (; i > 0; i--) - if (!master->match->compare[i - 1].duplicate) { - c = master->match->compare[i - 1].component; - component_unbind(c, master, data); + if (!adev->match->compare[i - 1].duplicate) { + c = adev->match->compare[i - 1].component; + component_unbind(c, adev, data); } }

@@ -675,8 +671,8 @@ static int __component_add(struct device *dev, const struct component_ops *ops,

ret = try_to_bring_up_masters(component); if (ret < 0) { - if (component->master) - remove_component(component->master, component); + if (component->adev) + remove_component(component->adev, component); list_del(&component->node);

kfree(component); @@ -757,9 +753,9 @@ void component_del(struct device *dev, const struct component_ops *ops) break; }

- if (component && component->master) { - take_down_master(component->master); - remove_component(component->master, component); + if (component && component->adev) { + take_down_aggregate_device(component->adev); + remove_component(component->adev, component); }

mutex_unlock(&component_mutex); diff --git a/include/linux/component.h b/include/linux/component.h index 16de18f473d7..71bfc3862633 100644 --- a/include/linux/component.h +++ b/include/linux/component.h @@ -41,7 +41,7 @@ void component_del(struct device *, const struct component_ops *); int component_bind_all(struct device *master, void *master_data); void component_unbind_all(struct device *master, void *master_data);

-struct master; +struct aggregate_device;

/** * struct component_master_ops - callback for the aggregate driver

This allows aggregate driver writers to use the device passed to their probe/remove/shutdown functions properly instead of treating it as an opaque pointer.

Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Laurent Pinchart laurent.pinchart@ideasonboard.com Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/base/component.c | 15 --------------- include/linux/component.h | 19 ++++++++++++++++--- 2 files changed, 16 insertions(+), 18 deletions(-)

diff --git a/drivers/base/component.c b/drivers/base/component.c index eec82caeae5e..dc38a8939ae6 100644 --- a/drivers/base/component.c +++ b/drivers/base/component.c @@ -56,21 +56,6 @@ struct component_match { struct component_match_array *compare; };

-struct aggregate_device { - const struct component_master_ops *ops; - struct device *parent; - struct device dev; - struct component_match *match; - struct aggregate_driver *adrv; - - int id; -}; - -static inline struct aggregate_device *to_aggregate_device(struct device *d) -{ - return container_of(d, struct aggregate_device, dev); -} - struct component { struct list_head node; struct aggregate_device *adev; diff --git a/include/linux/component.h b/include/linux/component.h index 95d1b23ede8a..e99cf8e910f0 100644 --- a/include/linux/component.h +++ b/include/linux/component.h @@ -5,6 +5,8 @@ #include <linux/stddef.h> #include <linux/device.h>

+struct component_match; + /** * struct component_ops - callbacks for component drivers * @@ -39,8 +41,6 @@ void component_del(struct device *, const struct component_ops *); int component_bind_all(struct device *master, void *master_data); void component_unbind_all(struct device *master, void *master_data);

-struct aggregate_device; - /** * struct component_master_ops - callback for the aggregate driver * @@ -80,7 +80,20 @@ struct component_master_ops { void (*unbind)(struct device *master); };

-struct component_match; +struct aggregate_device { + const struct component_master_ops *ops; + struct device *parent; + struct device dev; + struct component_match *match; + struct aggregate_driver *adrv; + + int id; +}; + +static inline struct aggregate_device *to_aggregate_device(struct device *d) +{ + return container_of(d, struct aggregate_device, dev); +}

/** * struct aggregate_driver - Aggregate driver (made up of other drivers)

We'd like to get more device model features in the component framework so let's pass the struct aggregate_device pointer instead of the parent device pointer to the component binding functions. This will allow drivers to inspect and control things related to the aggregate device in case they need it, and they'll always be able to get back to the device they were using before by using the 'parent' member of the aggregate device struct.

Suggested-by: Daniel Vetter daniel@ffwll.ch Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Laurent Pinchart laurent.pinchart@ideasonboard.com Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/base/component.c | 14 +++++++++++--- include/linux/component.h | 22 ++++++++++++++++++++++ 2 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/drivers/base/component.c b/drivers/base/component.c index dc38a8939ae6..e9e58b56cda4 100644 --- a/drivers/base/component.c +++ b/drivers/base/component.c @@ -699,8 +699,13 @@ static void component_unbind(struct component *component, { WARN_ON(!component->bound);

- if (component->ops && component->ops->unbind) - component->ops->unbind(component->dev, adev->parent, data); + if (component->ops) { + if (component->ops->unbind) + component->ops->unbind(component->dev, adev->parent, data); + else if (component->ops->unbind_component) + component->ops->unbind_component(component->dev, adev, data); + } + component->bound = false;

/* Release all resources claimed in the binding of this component */ @@ -765,7 +770,10 @@ static int component_bind(struct component *component, struct aggregate_device * dev_dbg(adev->parent, "binding %s (ops %ps)\n", dev_name(component->dev), component->ops);

- ret = component->ops->bind(component->dev, adev->parent, data); + if (component->ops->bind_component) + ret = component->ops->bind_component(component->dev, adev, data); + else + ret = component->ops->bind(component->dev, adev->parent, data); if (!ret) { component->bound = true;

diff --git a/include/linux/component.h b/include/linux/component.h index e99cf8e910f0..d8dcbf9733da 100644 --- a/include/linux/component.h +++ b/include/linux/component.h @@ -6,6 +6,7 @@ #include <linux/device.h>

struct component_match; +struct aggregate_device;

/** * struct component_ops - callbacks for component drivers @@ -19,18 +20,39 @@ struct component_ops { * * Called through component_bind_all() when the aggregate driver is * ready to bind the overall driver. + * + * Deprecated: Use bind_component() instead. */ int (*bind)(struct device *comp, struct device *master, void *master_data); + /** + * @bind_component: + * + * Called through component_bind_all() when the aggregate driver is + * ready to bind the overall driver. + */ + int (*bind_component)(struct device *comp, struct aggregate_device *adev, + void *aggregate_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. + * + * Deprecated: Use unbind_component() instead. */ void (*unbind)(struct device *comp, struct device *master, void *master_data); + /** + * @unbind_component: + * + * Called through component_unbind_all() when the aggregate driver is + * ready to unbind the overall driver, or when component_bind_all() fails + * part-ways through and needs to unbind some already bound components. + */ + int (*unbind_component)(struct device *comp, struct aggregate_device *adev, + void *aggregate_data); };

int component_add(struct device *, const struct component_ops *);

The device lists are poorly ordered when the component device code is used. This is because component_master_add_with_match() returns 0 regardless of component devices calling component_add() first. It can really only fail if an allocation fails, in which case everything is going bad and we're out of memory. The driver that registers the aggregate driver, can succeed at probe and put the attached device on the DPM lists before any of the component devices are probed and put on the lists.

Within the component device framework this usually isn't that bad because the real driver work is done at bind time via component{,master}_ops::bind(). It becomes a problem when the driver core, or host driver, wants to operate on the component device outside of the bind/unbind functions, e.g. via 'remove' or 'shutdown'. The driver core doesn't understand the relationship between the host device and the component devices and could possibly try to operate on component devices when they're already removed from the system or shut down.

Normally, device links or probe defer would reorder the lists and put devices that depend on other devices in the lists at the correct location, but with component devices this doesn't happen because this information isn't expressed anywhere. Drivers simply succeed at registering their component or the aggregate driver with the component framework and wait for their bind() callback to be called once the other components are ready. In summary, the drivers that make up the aggregate driver can probe in any order.

This ordering problem becomes fairly obvious when shutting down the device with a DSI controller connected to a DSI bridge that is controlled via i2c. In this case, the msm display driver wants to tear down the display pipeline on shutdown via msm_pdev_shutdown() by calling drm_atomic_helper_shutdown(), and it can't do that unless the whole display chain is still probed and active in the system. When a display bridge is on i2c, the i2c device for the bridge will be created whenever the i2c controller probes, which could be before or after the msm display driver probes. If the i2c controller probes after the display driver, then the i2c controller will be shutdown before the display controller during system wide shutdown and thus i2c transactions will stop working before the display pipeline is shut down. This means we'll have the display bridge trying to access an i2c bus that's shut down because drm_atomic_helper_shutdown() is trying to disable the bridge after the bridge is off.

The solution is to make the aggregate driver into a real struct driver that is bound to a device when the other component devices have all probed. Now that the component driver code is a proper bus, we can simply register an aggregate driver with that bus via component_aggregate_register() and then attach the shutdown hook to that driver to be sure that the shutdown for the display pipeline is called before any of the component device driver shutdown hooks are called.

Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/msm/msm_drv.c | 46 +++++++++++++++++++---------------- 1 file changed, 25 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 7936e8d498dd..f6e9b0d318f5 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -1360,19 +1360,35 @@ static int add_gpu_components(struct device *dev, return 0; }

-static int msm_drm_bind(struct device *dev) +static int msm_drm_bind(struct aggregate_device *adev) { - return msm_drm_init(dev, &msm_driver); + return msm_drm_init(adev->parent, &msm_driver); }

-static void msm_drm_unbind(struct device *dev) +static void msm_drm_unbind(struct aggregate_device *adev) { - msm_drm_uninit(dev); + msm_drm_uninit(adev->parent); +} + +static void msm_drm_shutdown(struct aggregate_device *adev) +{ + struct drm_device *drm = platform_get_drvdata(to_platform_device(adev->parent)); + struct msm_drm_private *priv = drm ? drm->dev_private : NULL; + + if (!priv || !priv->kms) + return; + + drm_atomic_helper_shutdown(drm); }

-static const struct component_master_ops msm_drm_ops = { - .bind = msm_drm_bind, - .unbind = msm_drm_unbind, +static struct aggregate_driver msm_drm_aggregate_driver = { + .probe = msm_drm_bind, + .remove = msm_drm_unbind, + .shutdown = msm_drm_shutdown, + .driver = { + .name = "msm_drm", + .owner = THIS_MODULE, + }, };

/* @@ -1401,7 +1417,7 @@ static int msm_pdev_probe(struct platform_device *pdev) if (ret) goto fail;

- ret = component_master_add_with_match(&pdev->dev, &msm_drm_ops, match); + ret = component_aggregate_register(&pdev->dev, &msm_drm_aggregate_driver, match); if (ret) goto fail;

@@ -1414,23 +1430,12 @@ static int msm_pdev_probe(struct platform_device *pdev)

static int msm_pdev_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &msm_drm_ops); + component_aggregate_unregister(&pdev->dev, &msm_drm_aggregate_driver); of_platform_depopulate(&pdev->dev);

return 0; }

-static void msm_pdev_shutdown(struct platform_device *pdev) -{ - struct drm_device *drm = platform_get_drvdata(pdev); - struct msm_drm_private *priv = drm ? drm->dev_private : NULL; - - if (!priv || !priv->kms) - return; - - drm_atomic_helper_shutdown(drm); -} - static const struct of_device_id dt_match[] = { { .compatible = "qcom,mdp4", .data = (void *)KMS_MDP4 }, { .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 }, @@ -1446,7 +1451,6 @@ MODULE_DEVICE_TABLE(of, dt_match); static struct platform_driver msm_platform_driver = { .probe = msm_pdev_probe, .remove = msm_pdev_remove, - .shutdown = msm_pdev_shutdown, .driver = { .name = "msm", .of_match_table = dt_match,

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Liviu Dudau liviu.dudau@arm.com Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/arm/hdlcd_drv.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c index 479c2422a2e0..5c03eb98d814 100644 --- a/drivers/gpu/drm/arm/hdlcd_drv.c +++ b/drivers/gpu/drm/arm/hdlcd_drv.c @@ -270,8 +270,9 @@ static const struct drm_driver hdlcd_driver = { .minor = 0, };

-static int hdlcd_drm_bind(struct device *dev) +static int hdlcd_drm_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm; struct hdlcd_drm_private *hdlcd; int ret; @@ -344,8 +345,9 @@ static int hdlcd_drm_bind(struct device *dev) return ret; }

-static void hdlcd_drm_unbind(struct device *dev) +static void hdlcd_drm_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm = dev_get_drvdata(dev); struct hdlcd_drm_private *hdlcd = drm->dev_private;

@@ -367,9 +369,13 @@ static void hdlcd_drm_unbind(struct device *dev) drm_dev_put(drm); }

-static const struct component_master_ops hdlcd_master_ops = { - .bind = hdlcd_drm_bind, - .unbind = hdlcd_drm_unbind, +static struct aggregate_driver hdlcd_aggregate_driver = { + .probe = hdlcd_drm_bind, + .remove = hdlcd_drm_unbind, + .driver = { + .name = "hdlcd_drm", + .owner = THIS_MODULE, + }, };

static int compare_dev(struct device *dev, void *data) @@ -390,13 +396,12 @@ static int hdlcd_probe(struct platform_device *pdev) drm_of_component_match_add(&pdev->dev, &match, compare_dev, port); of_node_put(port);

- return component_master_add_with_match(&pdev->dev, &hdlcd_master_ops, - match); + return component_aggregate_register(&pdev->dev, &hdlcd_aggregate_driver, match); }

static int hdlcd_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &hdlcd_master_ops); + component_aggregate_unregister(&pdev->dev, &hdlcd_aggregate_driver); return 0; }

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Russell King linux@armlinux.org.uk Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/armada/armada_drv.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c index 8e3e98f13db4..b3559363ea43 100644 --- a/drivers/gpu/drm/armada/armada_drv.c +++ b/drivers/gpu/drm/armada/armada_drv.c @@ -60,8 +60,9 @@ static const struct drm_mode_config_funcs armada_drm_mode_config_funcs = { .atomic_commit = drm_atomic_helper_commit, };

-static int armada_drm_bind(struct device *dev) +static int armada_drm_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct armada_private *priv; struct resource *mem = NULL; int ret, n; @@ -159,8 +160,9 @@ static int armada_drm_bind(struct device *dev) return ret; }

-static void armada_drm_unbind(struct device *dev) +static void armada_drm_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm = dev_get_drvdata(dev); struct armada_private *priv = drm_to_armada_dev(drm);

@@ -202,9 +204,13 @@ static void armada_add_endpoints(struct device *dev, } }

-static const struct component_master_ops armada_master_ops = { - .bind = armada_drm_bind, - .unbind = armada_drm_unbind, +static struct aggregate_driver armada_aggregate_driver = { + .probe = armada_drm_bind, + .remove = armada_drm_unbind, + .driver = { + .name = "armada_drm", + .owner = THIS_MODULE, + }, };

static int armada_drm_probe(struct platform_device *pdev) @@ -213,7 +219,7 @@ static int armada_drm_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; int ret;

- ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); + ret = drm_of_aggregate_probe(dev, compare_dev_name, &armada_aggregate_driver); if (ret != -EINVAL) return ret;

@@ -240,13 +246,12 @@ static int armada_drm_probe(struct platform_device *pdev) } }

- return component_master_add_with_match(&pdev->dev, &armada_master_ops, - match); + return component_aggregate_register(&pdev->dev, &armada_aggregate_driver, match); }

static int armada_drm_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &armada_master_ops); + component_aggregate_unregister(&pdev->dev, &armada_aggregate_driver); return 0; }

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Xinliang Liu xinliang.liu@linaro.org Cc: Tian Tao tiantao6@hisilicon.com Cc: John Stultz john.stultz@linaro.org Cc: Xinwei Kong kong.kongxinwei@hisilicon.com Cc: Chen Feng puck.chen@hisilicon.com Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- .../gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 20 ++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c index 98ae9a48f3fe..00d47c784cbb 100644 --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c @@ -217,8 +217,9 @@ static int kirin_drm_kms_cleanup(struct drm_device *dev) return 0; }

-static int kirin_drm_bind(struct device *dev) +static int kirin_drm_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct kirin_drm_data *driver_data; struct drm_device *drm_dev; int ret; @@ -253,8 +254,9 @@ static int kirin_drm_bind(struct device *dev) return ret; }

-static void kirin_drm_unbind(struct device *dev) +static void kirin_drm_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm_dev = dev_get_drvdata(dev);

drm_dev_unregister(drm_dev); @@ -262,9 +264,13 @@ static void kirin_drm_unbind(struct device *dev) drm_dev_put(drm_dev); }

-static const struct component_master_ops kirin_drm_ops = { - .bind = kirin_drm_bind, - .unbind = kirin_drm_unbind, +static struct aggregate_driver kirin_drm_aggregate_driver = { + .probe = kirin_drm_bind, + .remove = kirin_drm_unbind, + .driver = { + .name = "kirin_drm", + .owner = THIS_MODULE, + }, };

static int kirin_drm_platform_probe(struct platform_device *pdev) @@ -281,12 +287,12 @@ static int kirin_drm_platform_probe(struct platform_device *pdev) drm_of_component_match_add(dev, &match, compare_of, remote); of_node_put(remote);

- return component_master_add_with_match(dev, &kirin_drm_ops, match); + return component_aggregate_register(dev, &kirin_drm_aggregate_driver, match); }

static int kirin_drm_platform_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &kirin_drm_ops); + component_aggregate_unregister(&pdev->dev, &kirin_drm_aggregate_driver); return 0; }

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Philipp Zabel p.zabel@pengutronix.de Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/imx/imx-drm-core.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c index cb685fe2039b..9e28bb16364c 100644 --- a/drivers/gpu/drm/imx/imx-drm-core.c +++ b/drivers/gpu/drm/imx/imx-drm-core.c @@ -196,8 +196,9 @@ static int compare_of(struct device *dev, void *data) return dev->of_node == np; }

-static int imx_drm_bind(struct device *dev) +static int imx_drm_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm; int ret;

@@ -264,8 +265,9 @@ static int imx_drm_bind(struct device *dev) return ret; }

-static void imx_drm_unbind(struct device *dev) +static void imx_drm_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm = dev_get_drvdata(dev);

drm_dev_unregister(drm); @@ -279,14 +281,18 @@ static void imx_drm_unbind(struct device *dev) dev_set_drvdata(dev, NULL); }

-static const struct component_master_ops imx_drm_ops = { - .bind = imx_drm_bind, - .unbind = imx_drm_unbind, +static struct aggregate_driver imx_drm_aggregate_driver = { + .probe = imx_drm_bind, + .remove = imx_drm_unbind, + .driver = { + .name = "imx_drm", + .owner = THIS_MODULE, + }, };

static int imx_drm_platform_probe(struct platform_device *pdev) { - int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops); + int ret = drm_of_aggregate_probe(&pdev->dev, compare_of, &imx_drm_aggregate_driver);

if (!ret) ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); @@ -296,7 +302,7 @@ static int imx_drm_platform_probe(struct platform_device *pdev)

static int imx_drm_platform_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &imx_drm_ops); + component_aggregate_unregister(&pdev->dev, &imx_drm_aggregate_driver); return 0; }

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Tested-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/mcde/mcde_drv.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/mcde/mcde_drv.c b/drivers/gpu/drm/mcde/mcde_drv.c index 5b5afc6aaf8e..1652f9e0601d 100644 --- a/drivers/gpu/drm/mcde/mcde_drv.c +++ b/drivers/gpu/drm/mcde/mcde_drv.c @@ -215,8 +215,9 @@ static const struct drm_driver mcde_drm_driver = { DRM_GEM_CMA_DRIVER_OPS, };

-static int mcde_drm_bind(struct device *dev) +static int mcde_drm_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm = dev_get_drvdata(dev); int ret;

@@ -247,8 +248,9 @@ static int mcde_drm_bind(struct device *dev) return ret; }

-static void mcde_drm_unbind(struct device *dev) +static void mcde_drm_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm = dev_get_drvdata(dev);

drm_dev_unregister(drm); @@ -256,9 +258,13 @@ static void mcde_drm_unbind(struct device *dev) component_unbind_all(drm->dev, drm); }

-static const struct component_master_ops mcde_drm_comp_ops = { - .bind = mcde_drm_bind, - .unbind = mcde_drm_unbind, +static struct aggregate_driver mcde_drm_comp_driver = { + .probe = mcde_drm_bind, + .remove = mcde_drm_unbind, + .driver = { + .name = "mcde_drm", + .owner = THIS_MODULE, + }, };

static struct platform_driver *const mcde_component_drivers[] = { @@ -419,7 +425,7 @@ static int mcde_probe(struct platform_device *pdev) * Perform an invasive reset of the MCDE and all blocks by * cutting the power to the subsystem, then bring it back up * later when we enable the display as a result of - * component_master_add_with_match(). + * component_aggregate_register(). */ ret = regulator_disable(mcde->epod); if (ret) { @@ -429,8 +435,7 @@ static int mcde_probe(struct platform_device *pdev) /* Wait 50 ms so we are sure we cut the power */ usleep_range(50000, 70000);

- ret = component_master_add_with_match(&pdev->dev, &mcde_drm_comp_ops, - match); + ret = component_aggregate_register(&pdev->dev, &mcde_drm_comp_driver, match); if (ret) { dev_err(dev, "failed to add component master\n"); /* @@ -459,7 +464,7 @@ static int mcde_remove(struct platform_device *pdev) struct drm_device *drm = platform_get_drvdata(pdev); struct mcde *mcde = to_mcde(drm);

- component_master_del(&pdev->dev, &mcde_drm_comp_ops); + component_aggregate_unregister(&pdev->dev, &mcde_drm_comp_driver); clk_disable_unprepare(mcde->mcde_clk); regulator_disable(mcde->vana); regulator_disable(mcde->epod);

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Neil Armstrong narmstrong@baylibre.com Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/meson/meson_drv.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c index 7f41a33592c8..3028f2a45f66 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -356,13 +356,16 @@ static int meson_drv_bind_master(struct device *dev, bool has_components) return ret; }

-static int meson_drv_bind(struct device *dev) +static int meson_drv_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; + return meson_drv_bind_master(dev, true); }

-static void meson_drv_unbind(struct device *dev) +static void meson_drv_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct meson_drm *priv = dev_get_drvdata(dev); struct drm_device *drm = priv->drm;

@@ -386,9 +389,13 @@ static void meson_drv_unbind(struct device *dev) } }

-static const struct component_master_ops meson_drv_master_ops = { - .bind = meson_drv_bind, - .unbind = meson_drv_unbind, +static struct aggregate_driver meson_aggregate_drv = { + .probe = meson_drv_bind, + .remove = meson_drv_unbind, + .driver = { + .name = "meson_drm", + .owner = THIS_MODULE, + }, };

static int __maybe_unused meson_drv_pm_suspend(struct device *dev) @@ -502,9 +509,7 @@ static int meson_drv_probe(struct platform_device *pdev) if (count) { dev_info(&pdev->dev, "Queued %d outputs on vpu\n", count);

- return component_master_add_with_match(&pdev->dev, - &meson_drv_master_ops, - match); + return component_aggregate_register(&pdev->dev, &meson_aggregate_drv, match); }

/* If no output endpoints were available, simply bail out */

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Sandy Huang hjc@rock-chips.com Cc: "Heiko Stübner" heiko@sntech.de Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c index e4ebe60b3cc1..6c755361d376 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -109,8 +109,9 @@ static void rockchip_iommu_cleanup(struct drm_device *drm_dev) iommu_domain_free(private->domain); }

-static int rockchip_drm_bind(struct device *dev) +static int rockchip_drm_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm_dev; struct rockchip_drm_private *private; int ret; @@ -183,8 +184,9 @@ static int rockchip_drm_bind(struct device *dev) return ret; }

-static void rockchip_drm_unbind(struct device *dev) +static void rockchip_drm_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm_dev = dev_get_drvdata(dev);

drm_dev_unregister(drm_dev); @@ -346,9 +348,13 @@ static struct component_match *rockchip_drm_match_add(struct device *dev) return match ?: ERR_PTR(-ENODEV); }

-static const struct component_master_ops rockchip_drm_ops = { - .bind = rockchip_drm_bind, - .unbind = rockchip_drm_unbind, +static struct aggregate_driver rockchip_aggregate_driver = { + .probe = rockchip_drm_bind, + .remove = rockchip_drm_unbind, + .driver = { + .name = "rockchip_drm", + .owner = THIS_MODULE, + }, };

static int rockchip_drm_platform_of_probe(struct device *dev) @@ -419,7 +425,7 @@ static int rockchip_drm_platform_probe(struct platform_device *pdev) if (IS_ERR(match)) return PTR_ERR(match);

- ret = component_master_add_with_match(dev, &rockchip_drm_ops, match); + ret = component_aggregate_register(dev, &rockchip_aggregate_driver, match); if (ret < 0) { rockchip_drm_match_remove(dev); return ret; @@ -430,7 +436,7 @@ static int rockchip_drm_platform_probe(struct platform_device *pdev)

static int rockchip_drm_platform_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &rockchip_drm_ops); + component_aggregate_unregister(&pdev->dev, &rockchip_aggregate_driver);

rockchip_drm_match_remove(&pdev->dev);

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Maxime Ripard mripard@kernel.org Cc: Chen-Yu Tsai wens@csie.org Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/sun4i/sun4i_drv.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c index 54dd562e294c..700f5e32eaf7 100644 --- a/drivers/gpu/drm/sun4i/sun4i_drv.c +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c @@ -56,8 +56,9 @@ static const struct drm_driver sun4i_drv_driver = { DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE(drm_sun4i_gem_dumb_create), };

-static int sun4i_drv_bind(struct device *dev) +static int sun4i_drv_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm; struct sun4i_drv *drv; int ret; @@ -125,8 +126,9 @@ static int sun4i_drv_bind(struct device *dev) return ret; }

-static void sun4i_drv_unbind(struct device *dev) +static void sun4i_drv_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm = dev_get_drvdata(dev);

drm_dev_unregister(drm); @@ -140,9 +142,13 @@ static void sun4i_drv_unbind(struct device *dev) drm_dev_put(drm); }

-static const struct component_master_ops sun4i_drv_master_ops = { - .bind = sun4i_drv_bind, - .unbind = sun4i_drv_unbind, +static struct aggregate_driver sun4i_aggregate_driver = { + .probe = sun4i_drv_bind, + .remove = sun4i_drv_unbind, + .driver = { + .name = "sun4i_drm", + .owner = THIS_MODULE, + }, };

static bool sun4i_drv_node_is_connector(struct device_node *node) @@ -398,16 +404,14 @@ static int sun4i_drv_probe(struct platform_device *pdev) }

if (count) - return component_master_add_with_match(&pdev->dev, - &sun4i_drv_master_ops, - match); - else - return 0; + return component_aggregate_register(&pdev->dev, &sun4i_aggregate_driver, match); + + return 0; }

static int sun4i_drv_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &sun4i_drv_master_ops); + component_aggregate_unregister(&pdev->dev, &sun4i_aggregate_driver);

return 0; }

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Emma Anholt emma@anholt.net Cc: Maxime Ripard mripard@kernel.org Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/gpu/drm/vc4/vc4_drv.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 16abc3a3d601..82a44ebf9121 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -212,8 +212,9 @@ static void vc4_match_add_drivers(struct device *dev, } }

-static int vc4_drm_bind(struct device *dev) +static int vc4_drm_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct platform_device *pdev = to_platform_device(dev); struct drm_device *drm; struct vc4_dev *vc4; @@ -284,8 +285,9 @@ static int vc4_drm_bind(struct device *dev) return ret; }

-static void vc4_drm_unbind(struct device *dev) +static void vc4_drm_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct drm_device *drm = dev_get_drvdata(dev);

drm_dev_unregister(drm); @@ -293,9 +295,13 @@ static void vc4_drm_unbind(struct device *dev) drm_atomic_helper_shutdown(drm); }

-static const struct component_master_ops vc4_drm_ops = { - .bind = vc4_drm_bind, - .unbind = vc4_drm_unbind, +static struct aggregate_driver vc4_aggregate_driver = { + .probe = vc4_drm_bind, + .remove = vc4_drm_unbind, + .driver = { + .name = "vc4_drm", + .owner = THIS_MODULE, + }, };

/* @@ -326,12 +332,12 @@ static int vc4_platform_drm_probe(struct platform_device *pdev) vc4_match_add_drivers(dev, &match, component_drivers, ARRAY_SIZE(component_drivers));

- return component_master_add_with_match(dev, &vc4_drm_ops, match); + return component_aggregate_register(dev, &vc4_aggregate_driver, match); }

static int vc4_platform_drm_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &vc4_drm_ops); + component_aggregate_unregister(&pdev->dev, &vc4_aggregate_driver);

return 0; }

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: Tomas Winkler tomas.winkler@intel.com Cc: Vitaly Lubart vitaly.lubart@intel.com Cc: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Cc: Rodrigo Vivi rodrigo.vivi@intel.com Cc: Arnd Bergmann arnd@arndb.de Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Cc: Alexander Usyskin sanniu@gmail.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/misc/mei/hdcp/mei_hdcp.c | 22 +++++++++++++--------- drivers/misc/mei/pxp/mei_pxp.c | 22 +++++++++++++--------- 2 files changed, 26 insertions(+), 18 deletions(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c index ec2a4fce8581..ae903a09fb06 100644 --- a/drivers/misc/mei/hdcp/mei_hdcp.c +++ b/drivers/misc/mei/hdcp/mei_hdcp.c @@ -732,8 +732,9 @@ static const struct i915_hdcp_component_ops mei_hdcp_ops = { .close_hdcp_session = mei_hdcp_close_session, };

-static int mei_component_master_bind(struct device *dev) +static int mei_hdcp_aggregate_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct mei_cl_device *cldev = to_mei_cl_device(dev); struct i915_hdcp_comp_master *comp_master = mei_cldev_get_drvdata(cldev); @@ -749,8 +750,9 @@ static int mei_component_master_bind(struct device *dev) return 0; }

-static void mei_component_master_unbind(struct device *dev) +static void mei_hdcp_aggregate_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct mei_cl_device *cldev = to_mei_cl_device(dev); struct i915_hdcp_comp_master *comp_master = mei_cldev_get_drvdata(cldev); @@ -759,9 +761,13 @@ static void mei_component_master_unbind(struct device *dev) component_unbind_all(dev, comp_master); }

-static const struct component_master_ops mei_component_master_ops = { - .bind = mei_component_master_bind, - .unbind = mei_component_master_unbind, +static struct aggregate_driver mei_aggregate_driver = { + .probe = mei_hdcp_aggregate_bind, + .remove = mei_hdcp_aggregate_unbind, + .driver = { + .name = "mei_hdcp_agg", + .owner = THIS_MODULE, + }, };

/** @@ -826,9 +832,7 @@ static int mei_hdcp_probe(struct mei_cl_device *cldev, }

mei_cldev_set_drvdata(cldev, comp_master); - ret = component_master_add_with_match(&cldev->dev, - &mei_component_master_ops, - master_match); + ret = component_aggregate_register(&cldev->dev, &mei_aggregate_driver, master_match); if (ret < 0) { dev_err(&cldev->dev, "Master comp add failed %d\n", ret); goto err_exit; @@ -850,7 +854,7 @@ static void mei_hdcp_remove(struct mei_cl_device *cldev) mei_cldev_get_drvdata(cldev); int ret;

- component_master_del(&cldev->dev, &mei_component_master_ops); + component_aggregate_unregister(&cldev->dev, &mei_aggregate_driver); kfree(comp_master); mei_cldev_set_drvdata(cldev, NULL);

diff --git a/drivers/misc/mei/pxp/mei_pxp.c b/drivers/misc/mei/pxp/mei_pxp.c index f7380d387bab..7b7bd7c0e8b1 100644 --- a/drivers/misc/mei/pxp/mei_pxp.c +++ b/drivers/misc/mei/pxp/mei_pxp.c @@ -83,8 +83,9 @@ static const struct i915_pxp_component_ops mei_pxp_ops = { .recv = mei_pxp_receive_message, };

-static int mei_component_master_bind(struct device *dev) +static int mei_pxp_aggregate_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct mei_cl_device *cldev = to_mei_cl_device(dev); struct i915_pxp_component *comp_master = mei_cldev_get_drvdata(cldev); int ret; @@ -98,17 +99,22 @@ static int mei_component_master_bind(struct device *dev) return 0; }

-static void mei_component_master_unbind(struct device *dev) +static void mei_pxp_aggregate_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct mei_cl_device *cldev = to_mei_cl_device(dev); struct i915_pxp_component *comp_master = mei_cldev_get_drvdata(cldev);

component_unbind_all(dev, comp_master); }

-static const struct component_master_ops mei_component_master_ops = { - .bind = mei_component_master_bind, - .unbind = mei_component_master_unbind, +static struct aggregate_driver mei_aggregate_driver = { + .probe = mei_pxp_aggregate_bind, + .remove = mei_pxp_aggregate_unbind, + .driver = { + .name = "mei_pxp_agg", + .owner = THIS_MODULE, + } };

/** @@ -173,9 +179,7 @@ static int mei_pxp_probe(struct mei_cl_device *cldev, }

mei_cldev_set_drvdata(cldev, comp_master); - ret = component_master_add_with_match(&cldev->dev, - &mei_component_master_ops, - master_match); + ret = component_aggregate_register(&cldev->dev, &mei_aggregate_driver, master_match); if (ret < 0) { dev_err(&cldev->dev, "Master comp add failed %d\n", ret); goto err_exit; @@ -196,7 +200,7 @@ static void mei_pxp_remove(struct mei_cl_device *cldev) struct i915_pxp_component *comp_master = mei_cldev_get_drvdata(cldev); int ret;

- component_master_del(&cldev->dev, &mei_component_master_ops); + component_aggregate_unregister(&cldev->dev, &mei_aggregate_driver); kfree(comp_master); mei_cldev_set_drvdata(cldev, NULL);

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Cc: linux-omap@vger.kernel.org Cc: linux-fbdev@vger.kernel.org Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/video/fbdev/omap2/omapfb/dss/dss.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dss.c b/drivers/video/fbdev/omap2/omapfb/dss/dss.c index a6b1c1598040..f12663c39ceb 100644 --- a/drivers/video/fbdev/omap2/omapfb/dss/dss.c +++ b/drivers/video/fbdev/omap2/omapfb/dss/dss.c @@ -1067,8 +1067,9 @@ static int dss_video_pll_probe(struct platform_device *pdev) }

/* DSS HW IP initialisation */ -static int dss_bind(struct device *dev) +static int dss_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct platform_device *pdev = to_platform_device(dev); struct resource *dss_mem; u32 rev; @@ -1167,8 +1168,9 @@ static int dss_bind(struct device *dev) return r; }

-static void dss_unbind(struct device *dev) +static void dss_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct platform_device *pdev = to_platform_device(dev);

dss_initialized = false; @@ -1188,9 +1190,13 @@ static void dss_unbind(struct device *dev) dss_put_clocks(); }

-static const struct component_master_ops dss_component_ops = { - .bind = dss_bind, - .unbind = dss_unbind, +static struct aggregate_driver dss_aggregate_driver = { + .probe = dss_bind, + .remove = dss_unbind, + .driver = { + .name = "dss_fbdev", + .owner = THIS_MODULE, + }, };

static int dss_component_compare(struct device *dev, void *data) @@ -1225,7 +1231,7 @@ static int dss_probe(struct platform_device *pdev) /* add all the child devices as components */ device_for_each_child(&pdev->dev, &match, dss_add_child_component);

- r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match); + r = component_aggregate_register(&pdev->dev, &dss_aggregate_driver, match); if (r) return r;

@@ -1234,7 +1240,7 @@ static int dss_probe(struct platform_device *pdev)

static int dss_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &dss_component_ops); + component_aggregate_unregister(&pdev->dev, &dss_aggregate_driver); return 0; }

Use an aggregate driver instead of component ops so that we can get proper driver probe ordering of the aggregate device with respect to all the component devices that make up the aggregate device.

Acked-by: Mark Brown broonie@kernel.org Cc: Jaroslav Kysela perex@perex.cz Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- sound/soc/codecs/wcd938x.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c index 52de7d14b139..f44f5d41bfdb 100644 --- a/sound/soc/codecs/wcd938x.c +++ b/sound/soc/codecs/wcd938x.c @@ -4316,8 +4316,9 @@ static struct snd_soc_dai_driver wcd938x_dais[] = { }, };

-static int wcd938x_bind(struct device *dev) +static int wcd938x_bind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct wcd938x_priv *wcd938x = dev_get_drvdata(dev); int ret;

@@ -4400,8 +4401,9 @@ static int wcd938x_bind(struct device *dev)

}

-static void wcd938x_unbind(struct device *dev) +static void wcd938x_unbind(struct aggregate_device *adev) { + struct device *dev = adev->parent; struct wcd938x_priv *wcd938x = dev_get_drvdata(dev);

device_link_remove(dev, wcd938x->txdev); @@ -4411,9 +4413,13 @@ static void wcd938x_unbind(struct device *dev) component_unbind_all(dev, wcd938x); }

-static const struct component_master_ops wcd938x_comp_ops = { - .bind = wcd938x_bind, - .unbind = wcd938x_unbind, +static struct aggregate_driver wcd938x_aggregate_driver = { + .probe = wcd938x_bind, + .remove = wcd938x_unbind, + .driver = { + .name = "wcd938x_snd", + .owner = THIS_MODULE, + }, };

static int wcd938x_compare_of(struct device *dev, void *data) @@ -4482,7 +4488,7 @@ static int wcd938x_probe(struct platform_device *pdev)

wcd938x_reset(wcd938x);

- ret = component_master_add_with_match(dev, &wcd938x_comp_ops, match); + ret = component_aggregate_register(dev, &wcd938x_aggregate_driver, match); if (ret) return ret;

@@ -4498,7 +4504,7 @@ static int wcd938x_probe(struct platform_device *pdev)

static int wcd938x_remove(struct platform_device *pdev) { - component_master_del(&pdev->dev, &wcd938x_comp_ops); + component_aggregate_unregister(&pdev->dev, &wcd938x_aggregate_driver);

return 0; }

The struct is unused now so drop it along with the functions that use it.

Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Rob Clark robdclark@gmail.com Cc: Russell King rmk+kernel@arm.linux.org.uk Cc: Saravana Kannan saravanak@google.com Signed-off-by: Stephen Boyd swboyd@chromium.org --- drivers/base/component.c | 148 +++++--------------------------------- drivers/gpu/drm/drm_drv.c | 2 +- include/linux/component.h | 45 ------------ 3 files changed, 17 insertions(+), 178 deletions(-)

diff --git a/drivers/base/component.c b/drivers/base/component.c index e9e58b56cda4..cd50137753b4 100644 --- a/drivers/base/component.c +++ b/drivers/base/component.c @@ -133,18 +133,12 @@ static void component_debugfs_del(struct aggregate_device *m)

#endif

-struct aggregate_bus_find_data { - const struct component_master_ops *ops; - struct device *parent; -}; - static int aggregate_bus_find_match(struct device *dev, const void *_data) { struct aggregate_device *adev = to_aggregate_device(dev); - const struct aggregate_bus_find_data *data = _data; + const struct device *parent = _data;

- if (adev->parent == data->parent && - (!data->ops || adev->ops == data->ops)) + if (adev->parent == parent) return 1;

return 0; @@ -405,30 +399,15 @@ static int aggregate_device_match(struct device *dev, struct device_driver *drv) return ret; }

-/* TODO: Remove once all aggregate drivers use component_aggregate_register() */ -static int component_probe_bind(struct aggregate_device *adev) -{ - return adev->ops->bind(adev->parent); -} - -static void component_remove_unbind(struct aggregate_device *adev) -{ - adev->ops->unbind(adev->parent); -} - static int aggregate_driver_probe(struct device *dev) { const struct aggregate_driver *adrv = to_aggregate_driver(dev->driver); struct aggregate_device *adev = to_aggregate_device(dev); - bool modern = adrv->probe != component_probe_bind; int ret;

- /* Only do runtime PM when drivers migrate */ - if (modern) { - pm_runtime_get_noresume(dev); - pm_runtime_set_active(dev); - pm_runtime_enable(dev); - } + pm_runtime_get_noresume(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev);

mutex_lock(&component_mutex); if (devres_open_group(adev->parent, adev, GFP_KERNEL)) { @@ -441,7 +420,7 @@ static int aggregate_driver_probe(struct device *dev) devres_close_group(adev->parent, NULL); mutex_unlock(&component_mutex);

- if (ret && modern) { + if (ret) { pm_runtime_disable(dev); pm_runtime_set_suspended(dev); pm_runtime_put_noidle(dev); @@ -454,15 +433,10 @@ static void aggregate_driver_remove(struct device *dev) { const struct aggregate_driver *adrv = to_aggregate_driver(dev->driver); struct aggregate_device *adev = to_aggregate_device(dev); - bool modern = adrv->remove != component_remove_unbind;

- /* Only do runtime PM when drivers migrate */ - if (modern) - pm_runtime_get_sync(dev); + pm_runtime_get_sync(dev); adrv->remove(to_aggregate_device(dev)); devres_release_group(adev->parent, adev); - if (!modern) - return;

pm_runtime_put_noidle(dev);

@@ -488,16 +462,11 @@ static struct bus_type aggregate_bus_type = { };

/* Callers take ownership of return value, should call put_device() */ -static struct aggregate_device *__aggregate_find(struct device *parent, - const struct component_master_ops *ops) +static struct aggregate_device *__aggregate_find(struct device *parent) { struct device *dev; - struct aggregate_bus_find_data data = { - .ops = ops, - .parent = parent, - };

- dev = bus_find_device(&aggregate_bus_type, NULL, &data, + dev = bus_find_device(&aggregate_bus_type, NULL, parent, aggregate_bus_find_match);

return dev ? to_aggregate_device(dev) : NULL; @@ -515,7 +484,7 @@ static void aggregate_driver_unregister(struct aggregate_driver *adrv) }

static struct aggregate_device *aggregate_device_add(struct device *parent, - const struct component_master_ops *ops, struct aggregate_driver *adrv, + struct aggregate_driver *adrv, struct component_match *match) { struct aggregate_device *adev; @@ -540,7 +509,6 @@ static struct aggregate_device *aggregate_device_add(struct device *parent, adev->parent = parent; adev->dev.bus = &aggregate_bus_type; adev->dev.release = aggregate_device_release; - adev->ops = ops; adev->match = match; adev->adrv = adrv; dev_set_name(&adev->dev, "aggregate%d", id); @@ -556,54 +524,6 @@ static struct aggregate_device *aggregate_device_add(struct device *parent, return adev; }

-/** - * component_master_add_with_match - register an aggregate driver - * @parent: parent device of 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(). - * - * Deprecated: Use component_aggregate_register() instead. - */ -int component_master_add_with_match(struct device *parent, - const struct component_master_ops *ops, - struct component_match *match) -{ - struct aggregate_driver *adrv; - struct aggregate_device *adev; - int ret = 0; - - adrv = kzalloc(sizeof(*adrv), GFP_KERNEL); - if (!adrv) - return -ENOMEM; - - adev = aggregate_device_add(parent, ops, adrv, match); - if (IS_ERR(adev)) { - ret = PTR_ERR(adev); - goto err; - } - - adrv->probe = component_probe_bind; - adrv->remove = component_remove_unbind; - adrv->driver.owner = THIS_MODULE; - adrv->driver.name = dev_name(&adev->dev); - - ret = aggregate_driver_register(adrv); - if (!ret) - return 0; - - put_device(&adev->dev); -err: - kfree(adrv); - return ret; -} -EXPORT_SYMBOL_GPL(component_master_add_with_match); - /** * component_aggregate_register - register an aggregate driver * @parent: parent device of the aggregate driver @@ -620,7 +540,7 @@ int component_aggregate_register(struct device *parent, struct aggregate_device *adev; int ret;

- adev = aggregate_device_add(parent, NULL, adrv, match); + adev = aggregate_device_add(parent, adrv, match); if (IS_ERR(adev)) return PTR_ERR(adev);

@@ -632,42 +552,6 @@ int component_aggregate_register(struct device *parent, } EXPORT_SYMBOL_GPL(component_aggregate_register);

-/** - * component_master_del - unregister an aggregate driver - * @parent: parent device of 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. - * - * Deprecated: Use component_aggregate_unregister() instead. - */ -void component_master_del(struct device *parent, - const struct component_master_ops *ops) -{ - struct aggregate_device *adev; - struct aggregate_driver *adrv; - struct device_driver *drv; - - mutex_lock(&component_mutex); - adev = __aggregate_find(parent, ops); - mutex_unlock(&component_mutex); - - if (adev) { - drv = adev->dev.driver; - if (drv) { - adrv = to_aggregate_driver(drv); - aggregate_driver_unregister(adrv); - kfree(adrv); - } - - device_unregister(&adev->dev); - } - put_device(&adev->dev); -} -EXPORT_SYMBOL_GPL(component_master_del); - /** * component_aggregate_unregister - unregister an aggregate driver * @parent: parent device of the aggregate driver @@ -683,7 +567,7 @@ void component_aggregate_unregister(struct device *parent, struct aggregate_device *adev;

mutex_lock(&component_mutex); - adev = __aggregate_find(parent, NULL); + adev = __aggregate_find(parent); mutex_unlock(&component_mutex);

if (adev) @@ -719,7 +603,7 @@ static void component_unbind(struct component *component, * * Unbinds all components of the aggregate device by passing @data to their * &component_ops.unbind functions. Should be called from - * &component_master_ops.unbind. + * &aggregate_driver.remove. */ void component_unbind_all(struct device *parent, void *data) { @@ -729,7 +613,7 @@ void component_unbind_all(struct device *parent, void *data)

WARN_ON(!mutex_is_locked(&component_mutex));

- adev = __aggregate_find(parent, NULL); + adev = __aggregate_find(parent); if (!adev) return;

@@ -807,7 +691,7 @@ static int component_bind(struct component *component, struct aggregate_device * * * Binds all components of the aggregate @dev by passing @data to their * &component_ops.bind functions. Should be called from - * &component_master_ops.bind. + * &aggregate_driver.probe. */ int component_bind_all(struct device *parent, void *data) { @@ -818,7 +702,7 @@ int component_bind_all(struct device *parent, void *data)

WARN_ON(!mutex_is_locked(&component_mutex));

- adev = __aggregate_find(parent, NULL); + adev = __aggregate_find(parent); if (!adev) return -EINVAL;

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 7a5097467ba5..d188fa26bb1b 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -544,7 +544,7 @@ static void drm_fs_inode_free(struct inode *inode) * following guidelines apply: * * - The entire device initialization procedure should be run from the - * &component_master_ops.master_bind callback, starting with + * &aggregate_driver.probe callback, starting with * devm_drm_dev_alloc(), then binding all components with * component_bind_all() and finishing with drm_dev_register(). * diff --git a/include/linux/component.h b/include/linux/component.h index d8dcbf9733da..07fe481d4e3b 100644 --- a/include/linux/component.h +++ b/include/linux/component.h @@ -63,47 +63,7 @@ void component_del(struct device *, const struct component_ops *); int component_bind_all(struct device *master, void *master_data); void component_unbind_all(struct device *master, void *master_data);

-/** - * 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); -}; - struct aggregate_device { - const struct component_master_ops *ops; struct device *parent; struct device dev; struct component_match *match; @@ -171,11 +131,6 @@ int component_aggregate_register(struct device *parent, void component_aggregate_unregister(struct device *parent, struct aggregate_driver *adrv);

-void component_master_del(struct device *, - const struct component_master_ops *); - -int component_master_add_with_match(struct device *, - const struct component_master_ops *, struct component_match *); void component_match_add_release(struct device *master, struct component_match **matchptr, void (*release)(struct device *, void *),