samsung-sm8650/android_kernel_samsung_sm8650-modules
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Merge "disp: msm: fix re-entry problem for msm_atomic_commit"

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This commit is contained in:
qctecmdr
2019-08-12 19:15:32 -07:00
committed by Gerrit - the friendly Code Review server
parent b1ad60a7fd 8f99559493
commit c0a6abefe7
2 changed files with 8 additions and 1 deletions
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8
msm/msm_atomic.c
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@@ -28,6 +28,7 @@ struct msm_commit {
struct drm_device *dev;
struct drm_atomic_state *state;
uint32_t crtc_mask;
uint32_t plane_mask;
bool nonblock;
struct kthread_work commit_work;
};
@@ -104,11 +105,13 @@ static void commit_destroy(struct msm_commit *c)
{
struct msm_drm_private *priv = c->dev->dev_private;
uint32_t crtc_mask = c->crtc_mask;
uint32_t plane_mask = c->plane_mask;
/* End_atomic */
spin_lock(&priv->pending_crtcs_event.lock);
DBG("end: %08x", crtc_mask);
priv->pending_crtcs &= ~crtc_mask;
priv->pending_planes &= ~plane_mask;
wake_up_all_locked(&priv->pending_crtcs_event);
spin_unlock(&priv->pending_crtcs_event.lock);
@@ -715,6 +718,7 @@ int msm_atomic_commit(struct drm_device *dev,
drm_atomic_set_fence_for_plane(new_plane_state, fence);
}
c->plane_mask |= (1 << drm_plane_index(plane));
}
/*
@@ -725,10 +729,12 @@ int msm_atomic_commit(struct drm_device *dev,
/* Start Atomic */
spin_lock(&priv->pending_crtcs_event.lock);
ret = wait_event_interruptible_locked(priv->pending_crtcs_event,
!(priv->pending_crtcs & c->crtc_mask));
!(priv->pending_crtcs & c->crtc_mask) &&
!(priv->pending_planes & c->plane_mask));
if (ret == 0) {
DBG("start: %08x", c->crtc_mask);
priv->pending_crtcs |= c->crtc_mask;
priv->pending_planes |= c->plane_mask;
}
spin_unlock(&priv->pending_crtcs_event.lock);

1
msm/msm_drv.h
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@@ -631,6 +631,7 @@ struct msm_drm_private {
/* crtcs pending async atomic updates: */
uint32_t pending_crtcs;
uint32_t pending_planes;
wait_queue_head_t pending_crtcs_event;
unsigned int num_planes;