#include <drm/drm_plane_helper.h>
#include "intel_drv.h"
-
-/**
- * intel_atomic_check - validate state object
- * @dev: drm device
- * @state: state to validate
- */
-int intel_atomic_check(struct drm_device *dev,
- struct drm_atomic_state *state)
-{
- int nplanes = dev->mode_config.num_total_plane;
- int ncrtcs = dev->mode_config.num_crtc;
- int nconnectors = dev->mode_config.num_connector;
- enum pipe nuclear_pipe = INVALID_PIPE;
- int ret;
- int i;
- bool not_nuclear = false;
-
- /*
- * FIXME: At the moment, we only support "nuclear pageflip" on a
- * single CRTC. Cross-crtc updates will be added later.
- */
- for (i = 0; i < nplanes; i++) {
- struct intel_plane *plane = to_intel_plane(state->planes[i]);
- if (!plane)
- continue;
-
- if (nuclear_pipe == INVALID_PIPE) {
- nuclear_pipe = plane->pipe;
- } else if (nuclear_pipe != plane->pipe) {
- DRM_DEBUG_KMS("i915 only support atomic plane operations on a single CRTC at the moment\n");
- return -EINVAL;
- }
- }
-
- /*
- * FIXME: We only handle planes for now; make sure there are no CRTC's
- * or connectors involved.
- */
- state->allow_modeset = false;
- for (i = 0; i < ncrtcs; i++) {
- struct intel_crtc *crtc = to_intel_crtc(state->crtcs[i]);
- if (crtc && crtc->pipe != nuclear_pipe)
- not_nuclear = true;
- }
- for (i = 0; i < nconnectors; i++)
- if (state->connectors[i] != NULL)
- not_nuclear = true;
-
- if (not_nuclear) {
- DRM_DEBUG_KMS("i915 only supports atomic plane operations at the moment\n");
- return -EINVAL;
- }
-
- ret = drm_atomic_helper_check_planes(dev, state);
- if (ret)
- return ret;
-
- return ret;
-}
-
-
-/**
- * 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_modeset_disables(dev, state);
- * drm_atomic_helper_commit_planes(dev, state);
- * drm_atomic_helper_commit_modeset_enables(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;
-}
-
/**
* intel_connector_atomic_get_property - fetch connector property value
* @connector: connector to fetch property for
struct drm_crtc_state *
intel_crtc_duplicate_state(struct drm_crtc *crtc)
{
- struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_crtc_state *crtc_state;
- if (WARN_ON(!intel_crtc->config))
- crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL);
- else
- crtc_state = kmemdup(intel_crtc->config,
- sizeof(*intel_crtc->config), GFP_KERNEL);
+ crtc_state = kmemdup(crtc->state, sizeof(*crtc_state), GFP_KERNEL);
+ if (!crtc_state)
+ return NULL;
+
+ __drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
- if (crtc_state)
- crtc_state->base.crtc = crtc;
+ crtc_state->update_pipe = false;
return &crtc_state->base;
}
{
drm_atomic_helper_crtc_destroy_state(crtc, state);
}
+
+/**
+ * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
+ * @dev: DRM device
+ * @crtc: intel crtc
+ * @crtc_state: incoming crtc_state to validate and setup scalers
+ *
+ * This function sets up scalers based on staged scaling requests for
+ * a @crtc and its planes. It is called from crtc level check path. If request
+ * is a supportable request, it attaches scalers to requested planes and crtc.
+ *
+ * This function takes into account the current scaler(s) in use by any planes
+ * not being part of this atomic state
+ *
+ * Returns:
+ * 0 - scalers were setup succesfully
+ * error code - otherwise
+ */
+int intel_atomic_setup_scalers(struct drm_device *dev,
+ struct intel_crtc *intel_crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ struct drm_plane *plane = NULL;
+ struct intel_plane *intel_plane;
+ struct intel_plane_state *plane_state = NULL;
+ struct intel_crtc_scaler_state *scaler_state =
+ &crtc_state->scaler_state;
+ struct drm_atomic_state *drm_state = crtc_state->base.state;
+ int num_scalers_need;
+ int i, j;
+
+ num_scalers_need = hweight32(scaler_state->scaler_users);
+
+ /*
+ * High level flow:
+ * - staged scaler requests are already in scaler_state->scaler_users
+ * - check whether staged scaling requests can be supported
+ * - add planes using scalers that aren't in current transaction
+ * - assign scalers to requested users
+ * - as part of plane commit, scalers will be committed
+ * (i.e., either attached or detached) to respective planes in hw
+ * - as part of crtc_commit, scaler will be either attached or detached
+ * to crtc in hw
+ */
+
+ /* fail if required scalers > available scalers */
+ if (num_scalers_need > intel_crtc->num_scalers){
+ DRM_DEBUG_KMS("Too many scaling requests %d > %d\n",
+ num_scalers_need, intel_crtc->num_scalers);
+ return -EINVAL;
+ }
+
+ /* walkthrough scaler_users bits and start assigning scalers */
+ for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
+ int *scaler_id;
+ const char *name;
+ int idx;
+
+ /* skip if scaler not required */
+ if (!(scaler_state->scaler_users & (1 << i)))
+ continue;
+
+ if (i == SKL_CRTC_INDEX) {
+ name = "CRTC";
+ idx = intel_crtc->base.base.id;
+
+ /* panel fitter case: assign as a crtc scaler */
+ scaler_id = &scaler_state->scaler_id;
+ } else {
+ name = "PLANE";
+
+ /* plane scaler case: assign as a plane scaler */
+ /* find the plane that set the bit as scaler_user */
+ plane = drm_state->planes[i];
+
+ /*
+ * to enable/disable hq mode, add planes that are using scaler
+ * into this transaction
+ */
+ if (!plane) {
+ struct drm_plane_state *state;
+ plane = drm_plane_from_index(dev, i);
+ state = drm_atomic_get_plane_state(drm_state, plane);
+ if (IS_ERR(state)) {
+ DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n",
+ plane->base.id);
+ return PTR_ERR(state);
+ }
+
+ /*
+ * the plane is added after plane checks are run,
+ * but since this plane is unchanged just do the
+ * minimum required validation.
+ */
+ if (plane->type == DRM_PLANE_TYPE_PRIMARY)
+ intel_crtc->atomic.wait_for_flips = true;
+ crtc_state->base.planes_changed = true;
+ }
+
+ intel_plane = to_intel_plane(plane);
+ idx = plane->base.id;
+
+ /* plane on different crtc cannot be a scaler user of this crtc */
+ if (WARN_ON(intel_plane->pipe != intel_crtc->pipe)) {
+ continue;
+ }
+
+ plane_state = to_intel_plane_state(drm_state->plane_states[i]);
+ scaler_id = &plane_state->scaler_id;
+ }
+
+ if (*scaler_id < 0) {
+ /* find a free scaler */
+ for (j = 0; j < intel_crtc->num_scalers; j++) {
+ if (!scaler_state->scalers[j].in_use) {
+ scaler_state->scalers[j].in_use = 1;
+ *scaler_id = j;
+ DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n",
+ intel_crtc->pipe, *scaler_id, name, idx);
+ break;
+ }
+ }
+ }
+
+ if (WARN_ON(*scaler_id < 0)) {
+ DRM_DEBUG_KMS("Cannot find scaler for %s:%d\n", name, idx);
+ continue;
+ }
+
+ /* set scaler mode */
+ if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
+ /*
+ * when only 1 scaler is in use on either pipe A or B,
+ * scaler 0 operates in high quality (HQ) mode.
+ * In this case use scaler 0 to take advantage of HQ mode
+ */
+ *scaler_id = 0;
+ scaler_state->scalers[0].in_use = 1;
+ scaler_state->scalers[0].mode = PS_SCALER_MODE_HQ;
+ scaler_state->scalers[1].in_use = 0;
+ } else {
+ scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_DYN;
+ }
+ }
+
+ return 0;
+}
+
+static void
+intel_atomic_duplicate_dpll_state(struct drm_i915_private *dev_priv,
+ struct intel_shared_dpll_config *shared_dpll)
+{
+ enum intel_dpll_id i;
+
+ /* Copy shared dpll state */
+ for (i = 0; i < dev_priv->num_shared_dpll; i++) {
+ struct intel_shared_dpll *pll = &dev_priv->shared_dplls[i];
+
+ shared_dpll[i] = pll->config;
+ }
+}
+
+struct intel_shared_dpll_config *
+intel_atomic_get_shared_dpll_state(struct drm_atomic_state *s)
+{
+ struct intel_atomic_state *state = to_intel_atomic_state(s);
+
+ WARN_ON(!drm_modeset_is_locked(&s->dev->mode_config.connection_mutex));
+
+ if (!state->dpll_set) {
+ state->dpll_set = true;
+
+ intel_atomic_duplicate_dpll_state(to_i915(s->dev),
+ state->shared_dpll);
+ }
+
+ return state->shared_dpll;
+}
+
+struct drm_atomic_state *
+intel_atomic_state_alloc(struct drm_device *dev)
+{
+ struct intel_atomic_state *state = kzalloc(sizeof(*state), GFP_KERNEL);
+
+ if (!state || drm_atomic_state_init(dev, &state->base) < 0) {
+ kfree(state);
+ return NULL;
+ }
+
+ return &state->base;
+}
+
+void intel_atomic_state_clear(struct drm_atomic_state *s)
+{
+ struct intel_atomic_state *state = to_intel_atomic_state(s);
+ drm_atomic_state_default_clear(&state->base);
+ state->dpll_set = false;
+}
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