diff options
| author | Matt Roper <matthew.d.roper@intel.com> | 2015-01-19 19:31:49 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-01-26 10:21:56 +0300 |
| commit | 92890583627ee2a0518e55b063fcff86826fef96 (patch) | |
| tree | 1257552efa48a4d3a7622fe8aeac0da0f8fee277 /drivers/gpu | |
| parent | 281d1bbd34b734e4f22b30b6f3b673dda46a7470 (diff) | |
| download | linux-92890583627ee2a0518e55b063fcff86826fef96.tar.xz | |
drm/plane-helper: Skip prepare_fb/cleanup_fb when newfb==oldfb
When commiting a plane update where the framebuffer doesn't change, we
can skip the prepare_fb/cleanup_fb steps. This also allows us to avoid
an unnecessary vblank wait at the end of the operation when we're just
moving a plane and not changing its image (e.g., for a cursor).
At the moment, i915 is the only upstream driver using the transitional
plane helpers, and thus the only driver affected by this change.
Note that this replicates a corresponding change in the atomic helpers
implemented in
commit ab58e3384b9f9863bfd029b458ff337d381bf6d2
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Mon Nov 24 20:42:42 2014 +0100
drm/atomic-helper: Skip vblank waits for unchanged fbs
Reported-by: Jeremiah Mahler <jmmahler@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88540
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Tested-by: Tested-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/drm_plane_helper.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c index f24c4cfe674b..7a5814afe31a 100644 --- a/drivers/gpu/drm/drm_plane_helper.c +++ b/drivers/gpu/drm/drm_plane_helper.c @@ -435,7 +435,8 @@ int drm_plane_helper_commit(struct drm_plane *plane, goto out; } - if (plane_funcs->prepare_fb && plane_state->fb) { + if (plane_funcs->prepare_fb && plane_state->fb && + plane_state->fb != old_fb) { ret = plane_funcs->prepare_fb(plane, plane_state->fb); if (ret) goto out; @@ -456,6 +457,13 @@ int drm_plane_helper_commit(struct drm_plane *plane, crtc_funcs[i]->atomic_flush(crtc[i]); } + /* + * If we only moved the plane and didn't change fb's, there's no need to + * wait for vblank. + */ + if (plane->state->fb == old_fb) + goto out; + for (i = 0; i < 2; i++) { if (!crtc[i]) continue; |