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-rw-r--r--drivers/gpu/Makefile5
-rw-r--r--drivers/gpu/drm/tegra/drm.c4
-rw-r--r--drivers/gpu/host1x/bus.c111
-rw-r--r--drivers/gpu/host1x/bus.h4
-rw-r--r--drivers/gpu/host1x/dev.c6
-rw-r--r--include/linux/host1x.h18
6 files changed, 103 insertions, 45 deletions
diff --git a/drivers/gpu/Makefile b/drivers/gpu/Makefile
index 70da9eb52a42..e9ed439a5b65 100644
--- a/drivers/gpu/Makefile
+++ b/drivers/gpu/Makefile
@@ -1,3 +1,6 @@
-obj-y += drm/ vga/
+# drm/tegra depends on host1x, so if both drivers are built-in care must be
+# taken to initialize them in the correct order. Link order is the only way
+# to ensure this currently.
obj-$(CONFIG_TEGRA_HOST1X) += host1x/
+obj-y += drm/ vga/
obj-$(CONFIG_IMX_IPUV3_CORE) += ipu-v3/
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index d4f827593dfa..a0c18ae79029 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -912,7 +912,9 @@ static const struct of_device_id host1x_drm_subdevs[] = {
};
static struct host1x_driver host1x_drm_driver = {
- .name = "drm",
+ .driver = {
+ .name = "drm",
+ },
.probe = host1x_drm_probe,
.remove = host1x_drm_remove,
.subdevs = host1x_drm_subdevs,
diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c
index 0b52f0ea8871..4a99c6416e6a 100644
--- a/drivers/gpu/host1x/bus.c
+++ b/drivers/gpu/host1x/bus.c
@@ -72,13 +72,14 @@ static void host1x_subdev_del(struct host1x_subdev *subdev)
/**
* host1x_device_parse_dt() - scan device tree and add matching subdevices
*/
-static int host1x_device_parse_dt(struct host1x_device *device)
+static int host1x_device_parse_dt(struct host1x_device *device,
+ struct host1x_driver *driver)
{
struct device_node *np;
int err;
for_each_child_of_node(device->dev.parent->of_node, np) {
- if (of_match_node(device->driver->subdevs, np) &&
+ if (of_match_node(driver->subdevs, np) &&
of_device_is_available(np)) {
err = host1x_subdev_add(device, np);
if (err < 0)
@@ -109,17 +110,12 @@ static void host1x_subdev_register(struct host1x_device *device,
mutex_unlock(&device->clients_lock);
mutex_unlock(&device->subdevs_lock);
- /*
- * When all subdevices have been registered, the composite device is
- * ready to be probed.
- */
if (list_empty(&device->subdevs)) {
- err = device->driver->probe(device);
+ err = device_add(&device->dev);
if (err < 0)
- dev_err(&device->dev, "probe failed for %ps: %d\n",
- device->driver, err);
+ dev_err(&device->dev, "failed to add: %d\n", err);
else
- device->bound = true;
+ device->registered = true;
}
}
@@ -127,18 +123,16 @@ static void __host1x_subdev_unregister(struct host1x_device *device,
struct host1x_subdev *subdev)
{
struct host1x_client *client = subdev->client;
- int err;
/*
* If all subdevices have been activated, we're about to remove the
* first active subdevice, so unload the driver first.
*/
- if (list_empty(&device->subdevs) && device->bound) {
- err = device->driver->remove(device);
- if (err < 0)
- dev_err(&device->dev, "remove failed: %d\n", err);
-
- device->bound = false;
+ if (list_empty(&device->subdevs)) {
+ if (device->registered) {
+ device->registered = false;
+ device_del(&device->dev);
+ }
}
/*
@@ -265,20 +259,60 @@ static int host1x_del_client(struct host1x *host1x,
return -ENODEV;
}
-static struct bus_type host1x_bus_type = {
- .name = "host1x",
-};
+static int host1x_device_match(struct device *dev, struct device_driver *drv)
+{
+ return strcmp(dev_name(dev), drv->name) == 0;
+}
-int host1x_bus_init(void)
+static int host1x_device_probe(struct device *dev)
{
- return bus_register(&host1x_bus_type);
+ struct host1x_driver *driver = to_host1x_driver(dev->driver);
+ struct host1x_device *device = to_host1x_device(dev);
+
+ if (driver->probe)
+ return driver->probe(device);
+
+ return 0;
}
-void host1x_bus_exit(void)
+static int host1x_device_remove(struct device *dev)
{
- bus_unregister(&host1x_bus_type);
+ struct host1x_driver *driver = to_host1x_driver(dev->driver);
+ struct host1x_device *device = to_host1x_device(dev);
+
+ if (driver->remove)
+ return driver->remove(device);
+
+ return 0;
}
+static void host1x_device_shutdown(struct device *dev)
+{
+ struct host1x_driver *driver = to_host1x_driver(dev->driver);
+ struct host1x_device *device = to_host1x_device(dev);
+
+ if (driver->shutdown)
+ driver->shutdown(device);
+}
+
+static const struct dev_pm_ops host1x_device_pm_ops = {
+ .suspend = pm_generic_suspend,
+ .resume = pm_generic_resume,
+ .freeze = pm_generic_freeze,
+ .thaw = pm_generic_thaw,
+ .poweroff = pm_generic_poweroff,
+ .restore = pm_generic_restore,
+};
+
+struct bus_type host1x_bus_type = {
+ .name = "host1x",
+ .match = host1x_device_match,
+ .probe = host1x_device_probe,
+ .remove = host1x_device_remove,
+ .shutdown = host1x_device_shutdown,
+ .pm = &host1x_device_pm_ops,
+};
+
static void __host1x_device_del(struct host1x_device *device)
{
struct host1x_subdev *subdev, *sd;
@@ -347,6 +381,8 @@ static int host1x_device_add(struct host1x *host1x,
if (!device)
return -ENOMEM;
+ device_initialize(&device->dev);
+
mutex_init(&device->subdevs_lock);
INIT_LIST_HEAD(&device->subdevs);
INIT_LIST_HEAD(&device->active);
@@ -357,18 +393,14 @@ static int host1x_device_add(struct host1x *host1x,
device->dev.coherent_dma_mask = host1x->dev->coherent_dma_mask;
device->dev.dma_mask = &device->dev.coherent_dma_mask;
+ dev_set_name(&device->dev, "%s", driver->driver.name);
device->dev.release = host1x_device_release;
- dev_set_name(&device->dev, "%s", driver->name);
device->dev.bus = &host1x_bus_type;
device->dev.parent = host1x->dev;
- err = device_register(&device->dev);
- if (err < 0)
- return err;
-
- err = host1x_device_parse_dt(device);
+ err = host1x_device_parse_dt(device, driver);
if (err < 0) {
- device_unregister(&device->dev);
+ kfree(device);
return err;
}
@@ -399,7 +431,12 @@ static int host1x_device_add(struct host1x *host1x,
static void host1x_device_del(struct host1x *host1x,
struct host1x_device *device)
{
- device_unregister(&device->dev);
+ if (device->registered) {
+ device->registered = false;
+ device_del(&device->dev);
+ }
+
+ put_device(&device->dev);
}
static void host1x_attach_driver(struct host1x *host1x,
@@ -474,7 +511,8 @@ int host1x_unregister(struct host1x *host1x)
return 0;
}
-int host1x_driver_register(struct host1x_driver *driver)
+int host1x_driver_register_full(struct host1x_driver *driver,
+ struct module *owner)
{
struct host1x *host1x;
@@ -491,9 +529,12 @@ int host1x_driver_register(struct host1x_driver *driver)
mutex_unlock(&devices_lock);
- return 0;
+ driver->driver.bus = &host1x_bus_type;
+ driver->driver.owner = owner;
+
+ return driver_register(&driver->driver);
}
-EXPORT_SYMBOL(host1x_driver_register);
+EXPORT_SYMBOL(host1x_driver_register_full);
void host1x_driver_unregister(struct host1x_driver *driver)
{
diff --git a/drivers/gpu/host1x/bus.h b/drivers/gpu/host1x/bus.h
index 4099e99212c8..88fb1c4aac68 100644
--- a/drivers/gpu/host1x/bus.h
+++ b/drivers/gpu/host1x/bus.h
@@ -18,10 +18,10 @@
#ifndef HOST1X_BUS_H
#define HOST1X_BUS_H
+struct bus_type;
struct host1x;
-int host1x_bus_init(void);
-void host1x_bus_exit(void);
+extern struct bus_type host1x_bus_type;
int host1x_register(struct host1x *host1x);
int host1x_unregister(struct host1x *host1x);
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index 2529908d304b..53d3d1d45b48 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -216,7 +216,7 @@ static int __init tegra_host1x_init(void)
{
int err;
- err = host1x_bus_init();
+ err = bus_register(&host1x_bus_type);
if (err < 0)
return err;
@@ -233,7 +233,7 @@ static int __init tegra_host1x_init(void)
unregister_host1x:
platform_driver_unregister(&tegra_host1x_driver);
unregister_bus:
- host1x_bus_exit();
+ bus_unregister(&host1x_bus_type);
return err;
}
module_init(tegra_host1x_init);
@@ -242,7 +242,7 @@ static void __exit tegra_host1x_exit(void)
{
platform_driver_unregister(&tegra_mipi_driver);
platform_driver_unregister(&tegra_host1x_driver);
- host1x_bus_exit();
+ bus_unregister(&host1x_bus_type);
}
module_exit(tegra_host1x_exit);
diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index 7890b553d12e..464f33814a94 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -250,17 +250,29 @@ void host1x_job_unpin(struct host1x_job *job);
struct host1x_device;
struct host1x_driver {
+ struct device_driver driver;
+
const struct of_device_id *subdevs;
struct list_head list;
- const char *name;
int (*probe)(struct host1x_device *device);
int (*remove)(struct host1x_device *device);
+ void (*shutdown)(struct host1x_device *device);
};
-int host1x_driver_register(struct host1x_driver *driver);
+static inline struct host1x_driver *
+to_host1x_driver(struct device_driver *driver)
+{
+ return container_of(driver, struct host1x_driver, driver);
+}
+
+int host1x_driver_register_full(struct host1x_driver *driver,
+ struct module *owner);
void host1x_driver_unregister(struct host1x_driver *driver);
+#define host1x_driver_register(driver) \
+ host1x_driver_register_full(driver, THIS_MODULE)
+
struct host1x_device {
struct host1x_driver *driver;
struct list_head list;
@@ -273,7 +285,7 @@ struct host1x_device {
struct mutex clients_lock;
struct list_head clients;
- bool bound;
+ bool registered;
};
static inline struct host1x_device *to_host1x_device(struct device *dev)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 02:34:04 +0000