diff options
| author | Gabriel Krisman Bertazi <krisman@collabora.co.uk> | 2017-02-16 14:44:42 -0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-02-26 21:57:24 +0100 |
| commit | cd2523569a733d85788b6fc016e4e23cb3549a25 (patch) | |
| tree | 378a35ff0ea197ed9cee5bbe4d73108df23b87c6 /drivers/gpu/drm/drm_plane_helper.c | |
| parent | 3c6d6e0fbf5eb6367dfc8a97f72bd625e78b1aae (diff) | |
drm: Always prepare null framebuffer in transitional helper
Despite the documentation claim that cleanup_fb will match prior calls
to prepare_fb, in case of NULL framebuffers in the transitional helpers,
the code will skip the call to prepare_fb but not the corresponding
cleanup_fb call. This asymmetry in semantics is unnecessarily surprising
for developers transitioning drivers to atomic model, specially because
the final atomic handlers don't have the issue - the prepare_fb is
always called, despite the new state framebuffer being null.
The only current user of the transitional helper that doesn't take care
of null framebuffers explicitly inside the prepare_fb hook is
atmel_hlcdc, so we take special care to make sure we don't break
anything there.
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170216164442.28704-1-krisman@collabora.co.uk
Diffstat (limited to 'drivers/gpu/drm/drm_plane_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_plane_helper.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c index 148688fb920a..d8639e46bd2b 100644 --- a/drivers/gpu/drm/drm_plane_helper.c +++ b/drivers/gpu/drm/drm_plane_helper.c @@ -450,8 +450,7 @@ int drm_plane_helper_commit(struct drm_plane *plane, goto out; } - if (plane_funcs->prepare_fb && plane_state->fb && - plane_state->fb != old_fb) { + if (plane_funcs->prepare_fb && plane_state->fb != old_fb) { ret = plane_funcs->prepare_fb(plane, plane_state); if (ret) |