void intel_fbc_pre_update(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
struct intel_fbc *fbc = &dev_priv->fbc;
if (!fbc_supported(dev_priv))
return;
mutex_lock(&fbc->lock);
if (!multiple_pipes_ok(crtc)) {
fbc->no_fbc_reason = "more than one pipe active";
goto deactivate;
}
if (!fbc->enabled || fbc->crtc != crtc)
goto unlock;
intel_fbc_update_state_cache(crtc);
deactivate:
intel_fbc_deactivate(dev_priv);
unlock:
mutex_unlock(&fbc->lock);
}
void intel_fbc_pre_update(struct intel_crtc *crtc,
struct intel_crtc_state *crtc_state,
struct intel_plane_state *plane_state)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
struct intel_fbc *fbc = &dev_priv->fbc;
const char *reason = "update pending";
if (!fbc_supported(dev_priv))
return;
mutex_lock(&fbc->lock);
if (!multiple_pipes_ok(crtc, plane_state)) {
reason = "more than one pipe active";
goto deactivate;
}
if (!fbc->enabled || fbc->crtc != crtc)
goto unlock;
intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
deactivate:
intel_fbc_deactivate(dev_priv, reason);
unlock:
mutex_unlock(&fbc->lock);
}
/**
* intel_fbc_enable: tries to enable FBC on the CRTC
* @crtc: the CRTC
* @crtc_state: corresponding &drm_crtc_state for @crtc
* @plane_state: corresponding &drm_plane_state for the primary plane of @crtc
*
* This function checks if the given CRTC was chosen for FBC, then enables it if
* possible. Notice that it doesn't activate FBC. It is valid to call
* intel_fbc_enable multiple times for the same pipe without an
* intel_fbc_disable in the middle, as long as it is deactivated.
*/
void intel_fbc_enable(struct intel_crtc *crtc,
struct intel_crtc_state *crtc_state,
struct intel_plane_state *plane_state)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
struct intel_fbc *fbc = &dev_priv->fbc;
if (!fbc_supported(dev_priv))
return;
mutex_lock(&fbc->lock);
if (fbc->enabled) {
WARN_ON(fbc->crtc == NULL);
if (fbc->crtc == crtc) {
WARN_ON(!crtc_state->enable_fbc);
WARN_ON(fbc->active);
}
goto out;
}
if (!crtc_state->enable_fbc)
goto out;
WARN_ON(fbc->active);
WARN_ON(fbc->crtc != NULL);
intel_fbc_update_state_cache(crtc, crtc_state, plane_state);
if (intel_fbc_alloc_cfb(crtc)) {
fbc->no_fbc_reason = "not enough stolen memory";
goto out;
}
DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe));
fbc->no_fbc_reason = "FBC enabled but not active yet\n";
fbc->enabled = true;
fbc->crtc = crtc;
out:
mutex_unlock(&fbc->lock);
}