238e2e980be9 drm: Introduce DRM_CAP_ATOMIC_ERROR_REPORTING
3dae07ad9499 drm/i915/display: Error codes for async flip failures
f9702f56dd90 drm/atomic: Return user readable error in atomic_ioctl
27b4f5270a6d drm/atomic: Allocate atomic_state at the beginning of atomic_ioctl
7f11aa883e33 drm/atomic: Call complete_signaling only if prepare_signaling is done
0f70de342776 drm/atomic: Add error_code element in atomic_state
25622ce4edb1 drm: Define user readable error codes for atomic ioctl