diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-11-09 13:36:36 +0100 |
|---|---|---|
| committer | Liu Ying <victor.liu@nxp.com> | 2018-01-03 13:17:17 +0800 |
| commit | b027711a7661af652f464390beaa00ab00ee860d (patch) | |
| tree | e0edbec2f95f2a65e76fd544d6de8a1f753f3220 | |
| parent | 61938c64d7dc8597c1321c49ddbe13eec019006a (diff) | |
drm_fourcc: Document linear modifier
Not setting the fb modifiers flag is something different from setting
the fb modifiers to 0 (which means explicitly linear). We kinda failed
to document that properly. Spotted by Kristian.
Cc: hoegsberg@google.com
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1478694996-4200-1-git-send-email-daniel.vetter@ffwll.ch
(cherry picked from commit b9fb2a21ac8058965a6b3fcae736cfa7f411d6eb)
(cherry picked from commit f9c59801c36c0c887a9d76704f0028afa7c01273)
| -rw-r--r-- | include/uapi/drm/drm_fourcc.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h index 5d8336822457..ea518f7c4bde 100644 --- a/include/uapi/drm/drm_fourcc.h +++ b/include/uapi/drm/drm_fourcc.h @@ -175,6 +175,16 @@ extern "C" { * authoritative source for all of these. */ +/* + * Linear Layout + * + * Just plain linear layout. Note that this is different from no specifying any + * modifier (e.g. not setting DRM_MODE_FB_MODIFIERS in the DRM_ADDFB2 ioctl), + * which tells the driver to also take driver-internal information into account + * and so might actually result in a tiled framebuffer. + */ +#define DRM_FORMAT_MOD_LINEAR fourcc_mod_code(NONE, 0) + /* Intel framebuffer modifiers */ /* |