diff options
Diffstat (limited to 'include/uapi/drm/drm_mode.h')
| -rw-r--r-- | include/uapi/drm/drm_mode.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index ebf622f5b238..728790b92354 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -408,17 +408,20 @@ struct drm_mode_fb_cmd2 { * offsets[1]. Note that offsets[0] will generally * be 0 (but this is not required). * - * To accommodate tiled, compressed, etc formats, a per-plane + * To accommodate tiled, compressed, etc formats, a * modifier can be specified. The default value of zero * indicates "native" format as specified by the fourcc. - * Vendor specific modifier token. This allows, for example, - * different tiling/swizzling pattern on different planes. - * See discussion above of DRM_FORMAT_MOD_xxx. + * Vendor specific modifier token. Note that even though + * it looks like we have a modifier per-plane, we in fact + * do not. The modifier for each plane must be identical. + * Thus all combinations of different data layouts for + * multi plane formats must be enumerated as separate + * modifiers. */ __u32 handles[4]; __u32 pitches[4]; /* pitch for each plane */ __u32 offsets[4]; /* offset of each plane */ - __u64 modifier[4]; /* ie, tiling, compressed (per plane) */ + __u64 modifier[4]; /* ie, tiling, compress */ }; #define DRM_MODE_FB_DIRTY_ANNOTATE_COPY 0x01 |