drm/radeon/kms: move modeset init outside of GPU init

We are splitting GPU & modeset init so that it's easier
to abord only remaining GPU init when somethings fails.
We want to always provide enough funcionalities to get
fbcon and a shadowfb X working. Only acceptable error
during initialization are memory allocation failure or
io mapping failure.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 18 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index dce09ada32b..ac8505fe2ca 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -54,12 +54,23 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
                 flags |= RADEON_IS_PCI;
         }
 
+        /* radeon_device_init should report only fatal error
+         * like memory allocation failure or iomapping failure,
+         * or memory manager initialization failure, it must
+         * properly initialize the GPU MC controller and permit
+         * VRAM allocation
+         */
         r = radeon_device_init(rdev, dev, dev->pdev, flags);
         if (r) {
-                DRM_ERROR("Failed to initialize radeon, disabling IOCTL\n");
-                radeon_device_fini(rdev);
-                kfree(rdev);
-                dev->dev_private = NULL;
+                DRM_ERROR("Fatal error while trying to initialize radeon.\n");
+                return r;
+        }
+        /* Again modeset_init should fail only on fatal error
+         * otherwise it should provide enough functionalities
+         * for shadowfb to run
+         */
+        r = radeon_modeset_init(rdev);
+        if (r) {
                 return r;
         }
         return 0;
@@ -69,6 +80,9 @@ int radeon_driver_unload_kms(struct drm_device *dev)
 {
         struct radeon_device *rdev = dev->dev_private;
 
+        if (rdev == NULL)
+                return 0;
+        radeon_modeset_fini(rdev);
         radeon_device_fini(rdev);
         kfree(rdev);
         dev->dev_private = NULL;