提交 a250b9fd 编写于 作者: D Dave Airlie 提交者: Dave Airlie

drm: add usb framework

This adds an initial framework to plug USB graphics devices
into the drm/kms subsystem.

I've started writing a displaylink driver using this interface.
Signed-off-by: NDave Airlie <airlied@redhat.com>
上级 8410ea3b
......@@ -12,7 +12,7 @@ drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \
drm_platform.o drm_sysfs.o drm_hashtab.o drm_sman.o drm_mm.o \
drm_crtc.o drm_modes.o drm_edid.o \
drm_info.o drm_debugfs.o drm_encoder_slave.o \
drm_trace_points.o drm_global.o
drm_trace_points.o drm_global.o drm_usb.o
drm-$(CONFIG_COMPAT) += drm_ioc32.o
......
......@@ -463,6 +463,7 @@ void drm_put_dev(struct drm_device *dev)
drm_put_minor(&dev->primary);
list_del(&dev->driver_item);
if (dev->devname) {
kfree(dev->devname);
dev->devname = NULL;
......
#include "drmP.h"
#include <linux/usb.h>
#ifdef CONFIG_USB
int drm_get_usb_dev(struct usb_interface *interface,
const struct usb_device_id *id,
struct drm_driver *driver)
{
struct drm_device *dev;
struct usb_device *usbdev;
int ret;
DRM_DEBUG("\n");
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
usbdev = interface_to_usbdev(interface);
dev->usbdev = usbdev;
dev->dev = &usbdev->dev;
mutex_lock(&drm_global_mutex);
ret = drm_fill_in_dev(dev, NULL, driver);
if (ret) {
printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
goto err_g1;
}
usb_set_intfdata(interface, dev);
ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
if (ret)
goto err_g1;
ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
if (ret)
goto err_g2;
if (dev->driver->load) {
ret = dev->driver->load(dev, 0);
if (ret)
goto err_g3;
}
/* setup the grouping for the legacy output */
ret = drm_mode_group_init_legacy_group(dev,
&dev->primary->mode_group);
if (ret)
goto err_g3;
list_add_tail(&dev->driver_item, &driver->device_list);
mutex_unlock(&drm_global_mutex);
DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
driver->name, driver->major, driver->minor, driver->patchlevel,
driver->date, dev->primary->index);
return 0;
err_g3:
drm_put_minor(&dev->primary);
err_g2:
drm_put_minor(&dev->control);
err_g1:
kfree(dev);
mutex_unlock(&drm_global_mutex);
return ret;
}
EXPORT_SYMBOL(drm_get_usb_dev);
static int drm_usb_get_irq(struct drm_device *dev)
{
return 0;
}
static const char *drm_usb_get_name(struct drm_device *dev)
{
return "USB";
}
static int drm_usb_set_busid(struct drm_device *dev,
struct drm_master *master)
{
return 0;
}
static struct drm_bus drm_usb_bus = {
.bus_type = DRIVER_BUS_USB,
.get_irq = drm_usb_get_irq,
.get_name = drm_usb_get_name,
.set_busid = drm_usb_set_busid,
};
int drm_usb_init(struct drm_driver *driver, struct usb_driver *udriver)
{
int res;
DRM_DEBUG("\n");
INIT_LIST_HEAD(&driver->device_list);
driver->kdriver.usb = udriver;
driver->bus = &drm_usb_bus;
res = usb_register(udriver);
return res;
}
EXPORT_SYMBOL(drm_usb_init);
void drm_usb_exit(struct drm_driver *driver,
struct usb_driver *udriver)
{
usb_deregister(udriver);
}
EXPORT_SYMBOL(drm_usb_exit);
#endif
......@@ -925,6 +925,7 @@ struct drm_driver {
union {
struct pci_driver *pci;
struct platform_device *platform_device;
struct usb_driver *usb;
} kdriver;
struct drm_bus *bus;
......@@ -1130,6 +1131,7 @@ struct drm_device {
#endif
struct platform_device *platformdev; /**< Platform device struture */
struct usb_device *usbdev;
struct drm_sg_mem *sg; /**< Scatter gather memory */
int num_crtcs; /**< Number of CRTCs on this device */
......
#ifndef DRM_USB_H
#define DRM_USB_H
#include <drmP.h>
#include <linux/usb.h>
extern int drm_usb_init(struct drm_driver *driver, struct usb_driver *udriver);
extern void drm_usb_exit(struct drm_driver *driver, struct usb_driver *udriver);
int drm_get_usb_dev(struct usb_interface *interface,
const struct usb_device_id *id,
struct drm_driver *driver);
#endif
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册