drm: Convert proc files to seq_file and introduce debugfs

The old mechanism to formatting proc files is extremely ugly. The
seq_file API was designed specifically for cases like this and greatly
simplifies the process.

Also, most of the files in /proc really don't belong there. This patch
introduces the infrastructure for putting these into debugfs and exposes
all of the proc files in debugfs as well.

Signed-off-by: Ben Gamari <bgamari@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 14c7a23dc157..ed32edb17166 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -46,9 +46,11 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#include <linux/debugfs.h>
 #include "drmP.h"
 #include "drm_core.h"
 
+
 static int drm_version(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
 
@@ -178,7 +180,7 @@ int drm_lastclose(struct drm_device * dev)
 
         /* Clear AGP information */
         if (drm_core_has_AGP(dev) && dev->agp &&
-            !drm_core_check_feature(dev, DRIVER_MODESET)) {
+                        !drm_core_check_feature(dev, DRIVER_MODESET)) {
                 struct drm_agp_mem *entry, *tempe;
 
                 /* Remove AGP resources, but leave dev->agp
@@ -382,6 +384,13 @@ static int __init drm_core_init(void)
                 goto err_p3;
         }
 
+        drm_debugfs_root = debugfs_create_dir("dri", NULL);
+        if (!drm_debugfs_root) {
+                DRM_ERROR("Cannot create /debugfs/dri\n");
+                ret = -1;
+                goto err_p3;
+        }
+
         drm_mem_init();
 
         DRM_INFO("Initialized %s %d.%d.%d %s\n",
@@ -400,6 +409,7 @@ err_p1:
 static void __exit drm_core_exit(void)
 {
         remove_proc_entry("dri", NULL);
+        debugfs_remove(drm_debugfs_root);
         drm_sysfs_destroy();
 
         unregister_chrdev(DRM_MAJOR, "drm");