Explain how to perform front-buffer rendering. Signed-off-by: Simon Ser <contact@xxxxxxxxxxx> Cc: Pekka Paalanen <pekka.paalanen@xxxxxxxxxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> --- drivers/gpu/drm/drm_blend.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/drm_blend.c b/drivers/gpu/drm/drm_blend.c index 6e74de833466..6c55f1da2480 100644 --- a/drivers/gpu/drm/drm_blend.c +++ b/drivers/gpu/drm/drm_blend.c @@ -75,6 +75,9 @@ * the currently visible vertical area of the &drm_crtc. * FB_ID: * Mode object ID of the &drm_framebuffer this plane should scan out. + * + * To perform front-buffer rendering, user-space should set FB_ID to the + * previous framebuffer in atomic commits. * CRTC_ID: * Mode object ID of the &drm_crtc this plane should be connected to. * -- 2.41.0
