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authorMarek Olšák <maraeo@gmail.com>2010-08-07 03:36:34 +0200
committerDave Airlie <airlied@redhat.com>2010-08-10 08:20:31 +1000
commit43861f713c17223cd0fa87dcb57308b7cde7c10a (patch)
tree2f6a62798d84a1f1b61ec8a2fba9ee06e4c815de /drivers/gpu/drm/radeon
parentc17c2f892e23a3c70281a4e79bd7c2c226b1a561 (diff)
downloadlinux-linaro-android-43861f713c17223cd0fa87dcb57308b7cde7c10a.tar.gz
drm/radeon: add a way to revoke hyper-z access
Signed-off-by: Marek Olšák <maraeo@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon')
-rw-r--r--drivers/gpu/drm/radeon/radeon_kms.c24
1 files changed, 19 insertions, 5 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 948a2f454e4..b1c8ace5f08 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -162,13 +162,27 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
return -EINVAL;
}
case RADEON_INFO_WANT_HYPERZ:
+ /* The "value" here is both an input and output parameter.
+ * If the input value is 1, filp requests hyper-z access.
+ * If the input value is 0, filp revokes its hyper-z access.
+ *
+ * When returning, the value is 1 if filp owns hyper-z access,
+ * 0 otherwise. */
+ if (value >= 2) {
+ DRM_DEBUG_KMS("WANT_HYPERZ: invalid value %d\n", value);
+ return -EINVAL;
+ }
mutex_lock(&dev->struct_mutex);
- if (rdev->hyperz_filp)
- value = 0;
- else {
- rdev->hyperz_filp = filp;
- value = 1;
+ if (value == 1) {
+ /* wants hyper-z */
+ if (!rdev->hyperz_filp)
+ rdev->hyperz_filp = filp;
+ } else if (value == 0) {
+ /* revokes hyper-z */
+ if (rdev->hyperz_filp == filp)
+ rdev->hyperz_filp = NULL;
}
+ value = rdev->hyperz_filp == filp ? 1 : 0;
mutex_unlock(&dev->struct_mutex);
break;
default: