diff options
| author | Marek Olšák <maraeo@gmail.com> | 2010-08-07 03:36:34 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-08-10 08:20:31 +1000 |
| commit | 43861f713c17223cd0fa87dcb57308b7cde7c10a (patch) | |
| tree | 2f6a62798d84a1f1b61ec8a2fba9ee06e4c815de | |
| parent | c17c2f892e23a3c70281a4e79bd7c2c226b1a561 (diff) | |
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>
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_kms.c | 24 |
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 948a2f454e42..b1c8ace5f080 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: |