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_pci.c b/drivers/gpu/drm/drm_pci.c
index 2ea9ad4..e20f78b 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -124,4 +124,147 @@
EXPORT_SYMBOL(drm_pci_free);
+#ifdef CONFIG_PCI
+/**
+ * Register.
+ *
+ * \param pdev - PCI device structure
+ * \param ent entry from the PCI ID table with device type flags
+ * \return zero on success or a negative number on failure.
+ *
+ * Attempt to gets inter module "drm" information. If we are first
+ * then register the character device and inter module information.
+ * Try and register, if we fail to register, backout previous work.
+ */
+int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
+ struct drm_driver *driver)
+{
+ struct drm_device *dev;
+ int ret;
+
+ DRM_DEBUG("\n");
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ goto err_g1;
+
+ pci_set_master(pdev);
+
+ dev->pdev = pdev;
+ dev->dev = &pdev->dev;
+
+ dev->pci_device = pdev->device;
+ dev->pci_vendor = pdev->vendor;
+
+#ifdef __alpha__
+ dev->hose = pdev->sysdata;
+#endif
+
+ if ((ret = drm_fill_in_dev(dev, ent, driver))) {
+ printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
+ goto err_g2;
+ }
+
+ if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ pci_set_drvdata(pdev, dev);
+ ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
+ if (ret)
+ goto err_g2;
+ }
+
+ if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
+ goto err_g3;
+
+ if (dev->driver->load) {
+ ret = dev->driver->load(dev, ent->driver_data);
+ if (ret)
+ goto err_g4;
+ }
+
+ /* setup the grouping for the legacy output */
+ if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+ ret = drm_mode_group_init_legacy_group(dev,
+ &dev->primary->mode_group);
+ if (ret)
+ goto err_g4;
+ }
+
+ list_add_tail(&dev->driver_item, &driver->device_list);
+
+ DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
+ driver->name, driver->major, driver->minor, driver->patchlevel,
+ driver->date, pci_name(pdev), dev->primary->index);
+
+ return 0;
+
+err_g4:
+ drm_put_minor(&dev->primary);
+err_g3:
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ drm_put_minor(&dev->control);
+err_g2:
+ pci_disable_device(pdev);
+err_g1:
+ kfree(dev);
+ return ret;
+}
+EXPORT_SYMBOL(drm_get_pci_dev);
+
+/**
+ * PCI device initialization. Called via drm_init at module load time,
+ *
+ * \return zero on success or a negative number on failure.
+ *
+ * Initializes a drm_device structures,registering the
+ * stubs and initializing the AGP device.
+ *
+ * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
+ * after the initialization for driver customization.
+ */
+int drm_pci_init(struct drm_driver *driver)
+{
+ struct pci_dev *pdev = NULL;
+ const struct pci_device_id *pid;
+ int i;
+
+ if (driver->driver_features & DRIVER_MODESET)
+ return pci_register_driver(&driver->pci_driver);
+
+ /* If not using KMS, fall back to stealth mode manual scanning. */
+ for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {
+ pid = &driver->pci_driver.id_table[i];
+
+ /* Loop around setting up a DRM device for each PCI device
+ * matching our ID and device class. If we had the internal
+ * function that pci_get_subsys and pci_get_class used, we'd
+ * be able to just pass pid in instead of doing a two-stage
+ * thing.
+ */
+ pdev = NULL;
+ while ((pdev =
+ pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
+ pid->subdevice, pdev)) != NULL) {
+ if ((pdev->class & pid->class_mask) != pid->class)
+ continue;
+
+ /* stealth mode requires a manual probe */
+ pci_dev_get(pdev);
+ drm_get_pci_dev(pdev, pid, driver);
+ }
+ }
+ return 0;
+}
+
+#else
+
+int drm_pci_init(struct drm_driver *driver)
+{
+ return -1;
+}
+
+#endif
/*@}*/