summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/i915/intel_atomic.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/intel_atomic.c')
-rw-r--r--drivers/gpu/drm/i915/intel_atomic.c237
1 files changed, 237 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
new file mode 100644
index 000000000000..19a9dd5408f3
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -0,0 +1,237 @@
+/*
+ * Copyright © 2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * DOC: atomic modeset support
+ *
+ * The functions here implement the state management and hardware programming
+ * dispatch required by the atomic modeset infrastructure.
+ * See intel_atomic_plane.c for the plane-specific atomic functionality.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#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_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;
+}
+
+/**
+ * intel_connector_atomic_get_property - fetch connector property value
+ * @connector: connector to fetch property for
+ * @state: state containing the property value
+ * @property: property to look up
+ * @val: pointer to write property value into
+ *
+ * The DRM core does not store shadow copies of properties for
+ * atomic-capable drivers. This entrypoint is used to fetch
+ * the current value of a driver-specific connector property.
+ */
+int
+intel_connector_atomic_get_property(struct drm_connector *connector,
+ const struct drm_connector_state *state,
+ struct drm_property *property,
+ uint64_t *val)
+{
+ int i;
+
+ /*
+ * TODO: We only have atomic modeset for planes at the moment, so the
+ * crtc/connector code isn't quite ready yet. Until it's ready,
+ * continue to look up all property values in the DRM's shadow copy
+ * in obj->properties->values[].
+ *
+ * When the crtc/connector state work matures, this function should
+ * be updated to read the values out of the state structure instead.
+ */
+ for (i = 0; i < connector->base.properties->count; i++) {
+ if (connector->base.properties->properties[i] == property) {
+ *val = connector->base.properties->values[i];
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * intel_crtc_duplicate_state - duplicate crtc state
+ * @crtc: drm crtc
+ *
+ * Allocates and returns a copy of the crtc state (both common and
+ * Intel-specific) for the specified crtc.
+ *
+ * Returns: The newly allocated crtc state, or NULL on failure.
+ */
+struct drm_crtc_state *
+intel_crtc_duplicate_state(struct drm_crtc *crtc)
+{
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+ if (WARN_ON(!intel_crtc->config))
+ return kzalloc(sizeof(*intel_crtc->config), GFP_KERNEL);
+
+ return kmemdup(intel_crtc->config, sizeof(*intel_crtc->config),
+ GFP_KERNEL);
+}
+
+/**
+ * intel_crtc_destroy_state - destroy crtc state
+ * @crtc: drm crtc
+ *
+ * Destroys the crtc state (both common and Intel-specific) for the
+ * specified crtc.
+ */
+void
+intel_crtc_destroy_state(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ drm_atomic_helper_crtc_destroy_state(crtc, state);
+}