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| author | Hai Li <hali@codeaurora.org> | 2015-04-29 02:35:37 +0300 |
|---|---|---|
| committer | Rob Clark <robdclark@gmail.com> | 2015-06-11 20:11:04 +0300 |
| commit | 0a5c9aad119c4415e14ece4c17cec66aa572e827 (patch) | |
| tree | 35fb1752d5b0e0a38bec2ced4207d7dc0b2d8770 /drivers/gpu/drm/msm/msm_atomic.c | |
| parent | 7eed919a35a1e9289dbbc7b3c89bdb736a2b2a60 (diff) | |
| download | linux-0a5c9aad119c4415e14ece4c17cec66aa572e827.tar.xz | |
drm/msm: Use customized function to wait for atomic commit done
MDP FLUSH registers could indicate if the previous flush updates
has taken effect at vsync boundary. Making use of this H/W feature
can catch the vsync that happened between CRTC atomic_flush and
*_wait_for_vblanks, to avoid unnecessary wait.
This change allows kms CRTCs to use their own *_wait_for_commit_done
functions to wait for FLUSH register cleared at vsync, before commit
completion.
Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_atomic.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_atomic.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c index 5b192128cda2..84c0a72b446b 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -84,6 +84,33 @@ static void commit_destroy(struct msm_commit *c) kfree(c); } +static void msm_atomic_wait_for_commit_done(struct drm_device *dev, + struct drm_atomic_state *old_state) +{ + struct drm_crtc *crtc; + struct msm_drm_private *priv = old_state->dev->dev_private; + struct msm_kms *kms = priv->kms; + int ncrtcs = old_state->dev->mode_config.num_crtc; + int i; + + for (i = 0; i < ncrtcs; i++) { + crtc = old_state->crtcs[i]; + + if (!crtc) + continue; + + if (!crtc->state->enable) + continue; + + /* Legacy cursor ioctls are completely unsynced, and userspace + * relies on that (by doing tons of cursor updates). */ + if (old_state->legacy_cursor_update) + continue; + + kms->funcs->wait_for_crtc_commit_done(kms, crtc); + } +} + /* The (potentially) asynchronous part of the commit. At this point * nothing can fail short of armageddon. */ @@ -115,7 +142,7 @@ static void complete_commit(struct msm_commit *c) * not be critical path) */ - drm_atomic_helper_wait_for_vblanks(dev, state); + msm_atomic_wait_for_commit_done(dev, state); drm_atomic_helper_cleanup_planes(dev, state); @@ -139,7 +166,6 @@ static void add_fb(struct msm_commit *c, struct drm_framebuffer *fb) c->fence = max(c->fence, msm_gem_fence(to_msm_bo(obj), MSM_PREP_READ)); } - int msm_atomic_check(struct drm_device *dev, struct drm_atomic_state *state) { |