Commit b9fb2a21 authored by Daniel Vetter's avatar Daniel Vetter
Browse files

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: default avatarKristian H. Kristensen <hoegsberg@google.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1478694996-4200-1-git-send-email-daniel.vetter@ffwll.ch
parent 697cc9c8

include/uapi/drm/drm_fourcc.h

+10 −0
Original line number Diff line number Diff line
@@ -172,6 +172,16 @@ 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 */



/*