/**
* intel_atomic_commit - commit validated state object
* @dev: DRM device
* @state: the top-level driver state object
* @async: asynchronous commit
*
* This function commits a top-level state object that has been validated
* with drm_atomic_helper_check().
*
* FIXME: Atomic modeset support for i915 is not yet complete. At the moment
* we can only handle plane-related operations and do not yet support
* asynchronous commit.
*
* RETURNS
* Zero for success or -errno.
*/
int intel_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state,
bool async)
{
int ret;
int i;
if (async) {
DRM_DEBUG_KMS("i915 does not yet support async commit\n");
return -EINVAL;
}
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
return ret;
/* Point of no return */
/*
* FIXME: The proper sequence here will eventually be:
*
* drm_atomic_helper_swap_state(dev, state)
* drm_atomic_helper_commit_pre_planes(dev, state);
* drm_atomic_helper_commit_planes(dev, state);
* drm_atomic_helper_commit_post_planes(dev, state);
* drm_atomic_helper_wait_for_vblanks(dev, state);
* drm_atomic_helper_cleanup_planes(dev, state);
* drm_atomic_state_free(state);
*
* once we have full atomic modeset. For now, just manually update
* plane states to avoid clobbering good states with dummy states
* while nuclear pageflipping.
*/
for (i = 0; i < dev->mode_config.num_total_plane; i++) {
struct drm_plane *plane = state->planes[i];
if (!plane)
continue;
plane->state->state = state;
swap(state->plane_states[i], plane->state);
plane->state->state = NULL;
}
drm_atomic_helper_commit_planes(dev, state);
drm_atomic_helper_wait_for_vblanks(dev, state);
drm_atomic_helper_cleanup_planes(dev, state);
drm_atomic_state_free(state);
return 0;
}
static int atmel_hlcdc_dc_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state,
bool async)
{
struct atmel_hlcdc_dc *dc = dev->dev_private;
struct atmel_hlcdc_dc_commit *commit;
int ret;
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
return ret;
/* Allocate the commit object. */
commit = kzalloc(sizeof(*commit), GFP_KERNEL);
if (!commit) {
ret = -ENOMEM;
goto error;
}
INIT_WORK(&commit->work, atmel_hlcdc_dc_atomic_work);
commit->dev = dev;
commit->state = state;
spin_lock(&dc->commit.wait.lock);
ret = wait_event_interruptible_locked(dc->commit.wait,
!dc->commit.pending);
if (ret == 0)
dc->commit.pending = true;
spin_unlock(&dc->commit.wait.lock);
if (ret) {
kfree(commit);
goto error;
}
/* Swap the state, this is the point of no return. */
drm_atomic_helper_swap_state(state, true);
if (async)
queue_work(dc->wq, &commit->work);
else
atmel_hlcdc_dc_atomic_complete(commit);
return 0;
error:
drm_atomic_helper_cleanup_planes(dev, state);
return ret;
}
/**
* drm_atomic_helper_commit - commit validated state object
* @dev: DRM device
* @state: the driver state object
* @nonblock: nonblocking commit
*
* This function commits a with drm_atomic_helper_check() pre-validated state
* object. This can still fail when e.g. the framebuffer reservation fails.
*
* RETURNS
* Zero for success or -errno.
*/
int msm_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state, bool nonblock)
{
struct msm_drm_private *priv = dev->dev_private;
int nplanes = dev->mode_config.num_total_plane;
int ncrtcs = dev->mode_config.num_crtc;
struct msm_commit *c;
int i, ret;
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
return ret;
c = commit_init(state);
if (!c) {
ret = -ENOMEM;
goto error;
}
/*
* Figure out what crtcs we have:
*/
for (i = 0; i < ncrtcs; i++) {
struct drm_crtc *crtc = state->crtcs[i];
if (!crtc)
continue;
c->crtc_mask |= (1 << drm_crtc_index(crtc));
}
/*
* Figure out what fence to wait for:
*/
for (i = 0; i < nplanes; i++) {
struct drm_plane *plane = state->planes[i];
struct drm_plane_state *new_state = state->plane_states[i];
if (!plane)
continue;
if ((plane->state->fb != new_state->fb) && new_state->fb) {
struct drm_gem_object *obj = msm_framebuffer_bo(new_state->fb, 0);
struct msm_gem_object *msm_obj = to_msm_bo(obj);
new_state->fence = reservation_object_get_excl_rcu(msm_obj->resv);
}
}
/*
* Wait for pending updates on any of the same crtc's and then
* mark our set of crtc's as busy:
*/
ret = start_atomic(dev->dev_private, c->crtc_mask);
if (ret) {
kfree(c);
goto error;
}
/*
* This is the point of no return - everything below never fails except
* when the hw goes bonghits. Which means we can commit the new state on
* the software side now.
*/
drm_atomic_helper_swap_state(dev, state);
/*
* Everything below can be run asynchronously without the need to grab
* any modeset locks at all under one conditions: It must be guaranteed
* that the asynchronous work has either been cancelled (if the driver
* supports it, which at least requires that the framebuffers get
* cleaned up with drm_atomic_helper_cleanup_planes()) or completed
* before the new state gets committed on the software side with
* drm_atomic_helper_swap_state().
*
* This scheme allows new atomic state updates to be prepared and
* checked in parallel to the asynchronous completion of the previous
* update. Which is important since compositors need to figure out the
* composition of the next frame right after having submitted the
* current layout.
*/
if (nonblock) {
queue_work(priv->atomic_wq, &c->work);
return 0;
}
complete_commit(c, false);
return 0;
error:
drm_atomic_helper_cleanup_planes(dev, state);
return ret;
}
/**
* drm_atomic_helper_commit - commit validated state object
* @dev: DRM device
* @state: the driver state object
* @async: asynchronous commit
*
* This function commits a with drm_atomic_helper_check() pre-validated state
* object. This can still fail when e.g. the framebuffer reservation fails. For
* now this doesn't implement asynchronous commits.
*
* RETURNS
* Zero for success or -errno.
*/
int msm_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state, bool async)
{
int nplanes = dev->mode_config.num_total_plane;
int ncrtcs = dev->mode_config.num_crtc;
struct msm_commit *c;
int i, ret;
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
return ret;
c = new_commit(state);
if (!c)
return -ENOMEM;
/*
* Figure out what crtcs we have:
*/
for (i = 0; i < ncrtcs; i++) {
struct drm_crtc *crtc = state->crtcs[i];
if (!crtc)
continue;
c->crtc_mask |= (1 << drm_crtc_index(crtc));
}
/*
* Figure out what fence to wait for:
*/
for (i = 0; i < nplanes; i++) {
struct drm_plane *plane = state->planes[i];
struct drm_plane_state *new_state = state->plane_states[i];
if (!plane)
continue;
if ((plane->state->fb != new_state->fb) && new_state->fb)
add_fb(c, new_state->fb);
}
/*
* Wait for pending updates on any of the same crtc's and then
* mark our set of crtc's as busy:
*/
ret = start_atomic(dev->dev_private, c->crtc_mask);
if (ret)
return ret;
/*
* This is the point of no return - everything below never fails except
* when the hw goes bonghits. Which means we can commit the new state on
* the software side now.
*/
drm_atomic_helper_swap_state(dev, state);
/*
* Everything below can be run asynchronously without the need to grab
* any modeset locks at all under one conditions: It must be guaranteed
* that the asynchronous work has either been cancelled (if the driver
* supports it, which at least requires that the framebuffers get
* cleaned up with drm_atomic_helper_cleanup_planes()) or completed
* before the new state gets committed on the software side with
* drm_atomic_helper_swap_state().
*
* This scheme allows new atomic state updates to be prepared and
* checked in parallel to the asynchronous completion of the previous
* update. Which is important since compositors need to figure out the
* composition of the next frame right after having submitted the
* current layout.
*/
if (async) {
msm_queue_fence_cb(dev, &c->fence_cb, c->fence);
return 0;
}
ret = msm_wait_fence_interruptable(dev, c->fence, NULL);
if (ret) {
WARN_ON(ret); // TODO unswap state back? or??
kfree(c);
return ret;
}
complete_commit(c);
return 0;
}
