drm: Add support for platform devices to register as DRM devices
Allow platform devices without PCI resources to be DRM devices.
[airlied: fixup warnings with dev pointers]
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 9b9ff46..76d3d18 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -132,32 +132,57 @@
struct drm_master *master = file_priv->master;
int len;
- if (master->unique != NULL)
- return -EBUSY;
+ if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE)) {
+ master->unique_len = 10 + strlen(dev->platformdev->name);
+ master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
- master->unique_len = 40;
- master->unique_size = master->unique_len;
- master->unique = kmalloc(master->unique_size, GFP_KERNEL);
- if (master->unique == NULL)
- return -ENOMEM;
+ if (master->unique == NULL)
+ return -ENOMEM;
- len = snprintf(master->unique, master->unique_len, "pci:%04x:%02x:%02x.%d",
- drm_get_pci_domain(dev),
- dev->pdev->bus->number,
- PCI_SLOT(dev->pdev->devfn),
- PCI_FUNC(dev->pdev->devfn));
- if (len >= master->unique_len)
- DRM_ERROR("buffer overflow");
- else
- master->unique_len = len;
+ len = snprintf(master->unique, master->unique_len,
+ "platform:%s", dev->platformdev->name);
- dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) +
- master->unique_len + 2, GFP_KERNEL);
- if (dev->devname == NULL)
- return -ENOMEM;
+ if (len > master->unique_len)
+ DRM_ERROR("Unique buffer overflowed\n");
- sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
- master->unique);
+ dev->devname =
+ kmalloc(strlen(dev->platformdev->name) +
+ master->unique_len + 2, GFP_KERNEL);
+
+ if (dev->devname == NULL)
+ return -ENOMEM;
+
+ sprintf(dev->devname, "%s@%s", dev->platformdev->name,
+ master->unique);
+
+ } else {
+ master->unique_len = 40;
+ master->unique_size = master->unique_len;
+ master->unique = kmalloc(master->unique_size, GFP_KERNEL);
+ if (master->unique == NULL)
+ return -ENOMEM;
+
+ len = snprintf(master->unique, master->unique_len,
+ "pci:%04x:%02x:%02x.%d",
+ drm_get_pci_domain(dev),
+ dev->pdev->bus->number,
+ PCI_SLOT(dev->pdev->devfn),
+ PCI_FUNC(dev->pdev->devfn));
+ if (len >= master->unique_len)
+ DRM_ERROR("buffer overflow");
+ else
+ master->unique_len = len;
+
+ dev->devname =
+ kmalloc(strlen(dev->driver->pci_driver.name) +
+ master->unique_len + 2, GFP_KERNEL);
+
+ if (dev->devname == NULL)
+ return -ENOMEM;
+
+ sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
+ master->unique);
+ }
return 0;
}