diff options
Diffstat (limited to 'Documentation/gpu/drm-uapi.rst')
| -rw-r--r-- | Documentation/gpu/drm-uapi.rst | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst index a2214cc1f821..c9fd23efd957 100644 --- a/Documentation/gpu/drm-uapi.rst +++ b/Documentation/gpu/drm-uapi.rst @@ -190,13 +190,16 @@ ENOSPC: Simply running out of kernel/system memory is signalled through ENOMEM. -EPERM/EACCESS: +EPERM/EACCES: Returned for an operation that is valid, but needs more privileges. E.g. root-only or much more common, DRM master-only operations return this when when called by unpriviledged clients. There's no clear - difference between EACCESS and EPERM. + difference between EACCES and EPERM. ENODEV: + The device is not (yet) present or fully initialized. + +EOPNOTSUPP: Feature (like PRIME, modesetting, GEM) is not supported by the driver. ENXIO: @@ -235,6 +238,14 @@ DRM specific patterns. Note that ENOTTY has the slightly unintuitive meaning of Testing and validation ====================== +Testing Requirements for userspace API +-------------------------------------- + +New cross-driver userspace interface extensions, like new IOCTL, new KMS +properties, new files in sysfs or anything else that constitutes an API change +should have driver-agnostic testcases in IGT for that feature, if such a test +can be reasonably made using IGT for the target hardware. + Validating changes with IGT --------------------------- |