From d78d95efdfec5a39e470e8e866b864c8fc096c7a Mon Sep 17 00:00:00 2001
From: Jorge Zapata <turran@openmoko.com>
Date: Tue, 17 Feb 2009 17:48:14 +0100
Subject: Platform's DRM driver loading, unloading and sysfs interface support.

---
 drivers/gpu/drm/drm_drv.c   | 29 +++++++++++++++++++++++
 drivers/gpu/drm/drm_stub.c  | 57 ++++++++++++++++++++++++++++++++++++++++++---
 drivers/gpu/drm/drm_sysfs.c |  6 ++++-
 3 files changed, 88 insertions(+), 4 deletions(-)

(limited to 'drivers/gpu')

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 14c7a23dc15..30546a72d75 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -251,6 +251,7 @@ int drm_lastclose(struct drm_device * dev)
  */
 int drm_init(struct drm_driver *driver)
 {
+#ifdef CONFIG_PCI
 	struct pci_dev *pdev = NULL;
 	struct pci_device_id *pid;
 	int i;
@@ -280,11 +281,39 @@ int drm_init(struct drm_driver *driver)
 			drm_get_dev(pdev, pid, driver);
 		}
 	}
+#endif
 	return 0;
 }
 
 EXPORT_SYMBOL(drm_init);
 
+/**
+ *
+ * Call this to associate a drm_driver with a platform_device.
+ *
+ * \return zero on success or a negative number on failure.
+ *
+ * This is a replacement for drm_init(), but for platform drivers.
+ * In this case, the caller must provide the matching platform_device
+ *
+ * since there is no physical bus to scan through.
+ *
+ * \sa drm_init
+ *
+ */
+
+int drm_platform_init(struct drm_driver *driver, struct platform_device *pdev)
+{
+	DRM_DEBUG("\n");
+
+	INIT_LIST_HEAD(&driver->device_list);
+
+	return drm_get_platform_dev(pdev, driver);
+}
+
+EXPORT_SYMBOL(drm_platform_init);
+
+
 /**
  * Called via cleanup_module() at module unload time.
  *
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 46bb923b097..e8aa423bd9b 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -213,12 +213,13 @@ static int drm_fill_in_dev(struct drm_device * dev, struct pci_dev *pdev,
 	idr_init(&dev->drw_idr);
 
 	dev->pdev = pdev;
-	dev->pci_device = pdev->device;
-	dev->pci_vendor = pdev->vendor;
-
+	if (pdev) {
+		dev->pci_device = pdev->device;
+		dev->pci_vendor = pdev->vendor;
 #ifdef __alpha__
 	dev->hose = pdev->sysdata;
 #endif
+	}
 
 	if (drm_ht_create(&dev->map_hash, 12)) {
 		return -ENOMEM;
@@ -418,6 +419,56 @@ err_g1:
 	return ret;
 }
 
+ /**
+ *
+ * Register a platform device as a DRM device
+ *
+ * \param pdev - platform device structure
+ * \param driver - the matching drm_driver structure
+ * \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.
+ *
+ * \sa drm_get_dev
+ */
+int drm_get_platform_dev(struct platform_device *pdev,
+                         struct drm_driver *driver)
+{
+	struct drm_device *dev;
+	int ret;
+#if 0
+	int len;
+#endif
+	DRM_DEBUG("\n");
+
+	dev = drm_calloc(1, sizeof(*dev), DRM_MEM_STUB);
+	if (!dev)
+		return -ENOMEM;
+
+	if ((ret = drm_fill_in_dev(dev, NULL, NULL, driver))) {
+		printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
+		goto err_g1;
+	}
+
+	dev->platform_dev = pdev;
+	if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))
+		goto err_g1;
+
+	list_add_tail(&dev->driver_item, &driver->device_list);
+
+	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_g1:
+	drm_free(dev, sizeof(*dev), DRM_MEM_STUB);
+	return ret;
+}
+
 /**
  * Put a device minor number.
  *
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index 5aa6780652a..44f7f16ebd6 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -477,7 +477,11 @@ int drm_sysfs_device_add(struct drm_minor *minor)
 	int i, j;
 	char *minor_str;
 
-	minor->kdev.parent = &minor->dev->pdev->dev;
+	if (minor->dev->pdev) {
+		minor->kdev.parent = &minor->dev->pdev->dev;
+	} else {
+		minor->kdev.parent = &minor->dev->platform_dev->dev;
+	}
 	minor->kdev.class = drm_class;
 	minor->kdev.release = drm_sysfs_device_release;
 	minor->kdev.devt = minor->device;
-- 
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