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>

1 files changed, 44 insertions, 8 deletions

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 8f7f5cb4a86d..6235169d5950 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -9,6 +9,7 @@
 /*
  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * Copyright (c) 2009-2010, Code Aurora Forum.
  * All rights reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -48,6 +49,7 @@
 #include <linux/proc_fs.h>
 #include <linux/init.h>
 #include <linux/file.h>
+#include <linux/platform_device.h>
 #include <linux/pci.h>
 #include <linux/jiffies.h>
 #include <linux/smp_lock.h>     /* For (un)lock_kernel */
@@ -144,6 +146,7 @@ extern void drm_ut_debug_printk(unsigned int request_level,
 #define DRIVER_IRQ_VBL2    0x800
 #define DRIVER_GEM         0x1000
 #define DRIVER_MODESET     0x2000
+#define DRIVER_USE_PLATFORM_DEVICE  0x4000
 
 /***********************************************************************/
 /** \name Begin the DRM... */
@@ -823,6 +826,7 @@ struct drm_driver {
         int num_ioctls;
         struct file_operations fops;
         struct pci_driver pci_driver;
+        struct platform_device *platform_device;
         /* List of devices hanging off this driver */
         struct list_head device_list;
 };
@@ -1015,12 +1019,16 @@ struct drm_device {
 
         struct drm_agp_head *agp;       /**< AGP data */
 
+        struct device *dev;             /**< Device structure */
         struct pci_dev *pdev;           /**< PCI device structure */
         int pci_vendor;                 /**< PCI vendor id */
         int pci_device;                 /**< PCI device id */
 #ifdef __alpha__
         struct pci_controller *hose;
 #endif
+
+        struct platform_device *platformdev; /**< Platform device struture */
+
         struct drm_sg_mem *sg;  /**< Scatter gather memory */
         int num_crtcs;                  /**< Number of CRTCs on this device */
         void *dev_private;              /**< device private data */
@@ -1060,17 +1068,21 @@ struct drm_device {
 
 };
 
-static inline int drm_dev_to_irq(struct drm_device *dev)
-{
-        return dev->pdev->irq;
-}
-
 static __inline__ int drm_core_check_feature(struct drm_device *dev,
                                              int feature)
 {
         return ((dev->driver->driver_features & feature) ? 1 : 0);
 }
 
+
+static inline int drm_dev_to_irq(struct drm_device *dev)
+{
+        if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE))
+                return platform_get_irq(dev->platformdev, 0);
+        else
+                return dev->pdev->irq;
+}
+
 #ifdef __alpha__
 #define drm_get_pci_domain(dev) dev->hose->index
 #else
@@ -1347,8 +1359,11 @@ extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
 struct drm_master *drm_master_create(struct drm_minor *minor);
 extern struct drm_master *drm_master_get(struct drm_master *master);
 extern void drm_master_put(struct drm_master **master);
-extern int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
-                       struct drm_driver *driver);
+extern int drm_get_pci_dev(struct pci_dev *pdev,
+                           const struct pci_device_id *ent,
+                           struct drm_driver *driver);
+extern int drm_get_platform_dev(struct platform_device *pdev,
+                                struct drm_driver *driver);
 extern void drm_put_dev(struct drm_device *dev);
 extern int drm_put_minor(struct drm_minor **minor);
 extern unsigned int drm_debug;
@@ -1525,6 +1540,9 @@ static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
 
 static __inline__ int drm_device_is_agp(struct drm_device *dev)
 {
+        if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE))
+                return 0;
+
         if (dev->driver->device_is_agp != NULL) {
                 int err = (*dev->driver->device_is_agp) (dev);
 
@@ -1538,7 +1556,10 @@ static __inline__ int drm_device_is_agp(struct drm_device *dev)
 
 static __inline__ int drm_device_is_pcie(struct drm_device *dev)
 {
-        return pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
+        if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE))
+                return 0;
+        else
+                return pci_find_capability(dev->pdev, PCI_CAP_ID_EXP);
 }
 
 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
@@ -1546,6 +1567,21 @@ static __inline__ void drm_core_dropmap(struct drm_local_map *map)
 }
 
 #include "drm_mem_util.h"
+
+static inline void *drm_get_device(struct drm_device *dev)
+{
+        if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE))
+                return dev->platformdev;
+        else
+                return dev->pdev;
+}
+
+extern int drm_platform_init(struct drm_driver *driver);
+extern int drm_pci_init(struct drm_driver *driver);
+extern int drm_fill_in_dev(struct drm_device *dev,
+                           const struct pci_device_id *ent,
+                           struct drm_driver *driver);
+int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
 /*@}*/
 
 #endif                          /* __KERNEL__ */