246 lines
7.1 KiB
C
246 lines
7.1 KiB
C
/*
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* Copyright © 2015 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* DOC: atomic modeset support
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*
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* The functions here implement the state management and hardware programming
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* dispatch required by the atomic modeset infrastructure.
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* See intel_atomic_plane.c for the plane-specific atomic functionality.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_plane_helper.h>
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#include "intel_drv.h"
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/**
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* intel_atomic_check - validate state object
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* @dev: drm device
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* @state: state to validate
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*/
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int intel_atomic_check(struct drm_device *dev,
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struct drm_atomic_state *state)
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{
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int nplanes = dev->mode_config.num_total_plane;
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int ncrtcs = dev->mode_config.num_crtc;
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int nconnectors = dev->mode_config.num_connector;
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enum pipe nuclear_pipe = INVALID_PIPE;
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int ret;
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int i;
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bool not_nuclear = false;
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/*
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* FIXME: At the moment, we only support "nuclear pageflip" on a
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* single CRTC. Cross-crtc updates will be added later.
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*/
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for (i = 0; i < nplanes; i++) {
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struct intel_plane *plane = to_intel_plane(state->planes[i]);
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if (!plane)
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continue;
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if (nuclear_pipe == INVALID_PIPE) {
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nuclear_pipe = plane->pipe;
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} else if (nuclear_pipe != plane->pipe) {
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DRM_DEBUG_KMS("i915 only support atomic plane operations on a single CRTC at the moment\n");
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return -EINVAL;
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}
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}
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/*
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* FIXME: We only handle planes for now; make sure there are no CRTC's
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* or connectors involved.
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*/
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state->allow_modeset = false;
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for (i = 0; i < ncrtcs; i++) {
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struct intel_crtc *crtc = to_intel_crtc(state->crtcs[i]);
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if (crtc)
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memset(&crtc->atomic, 0, sizeof(crtc->atomic));
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if (crtc && crtc->pipe != nuclear_pipe)
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not_nuclear = true;
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}
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for (i = 0; i < nconnectors; i++)
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if (state->connectors[i] != NULL)
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not_nuclear = true;
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if (not_nuclear) {
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DRM_DEBUG_KMS("i915 only supports atomic plane operations at the moment\n");
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return -EINVAL;
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}
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ret = drm_atomic_helper_check_planes(dev, state);
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if (ret)
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return ret;
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return ret;
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}
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/**
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* intel_atomic_commit - commit validated state object
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* @dev: DRM device
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* @state: the top-level driver state object
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* @async: asynchronous commit
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*
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* This function commits a top-level state object that has been validated
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* with drm_atomic_helper_check().
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*
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* FIXME: Atomic modeset support for i915 is not yet complete. At the moment
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* we can only handle plane-related operations and do not yet support
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* asynchronous commit.
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*
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* RETURNS
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* Zero for success or -errno.
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*/
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int intel_atomic_commit(struct drm_device *dev,
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struct drm_atomic_state *state,
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bool async)
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{
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int ret;
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int i;
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if (async) {
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DRM_DEBUG_KMS("i915 does not yet support async commit\n");
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return -EINVAL;
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}
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ret = drm_atomic_helper_prepare_planes(dev, state);
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if (ret)
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return ret;
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/* Point of no return */
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/*
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* FIXME: The proper sequence here will eventually be:
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*
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* drm_atomic_helper_swap_state(dev, state)
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* drm_atomic_helper_commit_modeset_disables(dev, state);
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* drm_atomic_helper_commit_planes(dev, state);
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* drm_atomic_helper_commit_modeset_enables(dev, state);
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* drm_atomic_helper_wait_for_vblanks(dev, state);
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* drm_atomic_helper_cleanup_planes(dev, state);
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* drm_atomic_state_free(state);
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*
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* once we have full atomic modeset. For now, just manually update
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* plane states to avoid clobbering good states with dummy states
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* while nuclear pageflipping.
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*/
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for (i = 0; i < dev->mode_config.num_total_plane; i++) {
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struct drm_plane *plane = state->planes[i];
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if (!plane)
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continue;
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plane->state->state = state;
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swap(state->plane_states[i], plane->state);
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plane->state->state = NULL;
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}
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drm_atomic_helper_commit_planes(dev, state);
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drm_atomic_helper_wait_for_vblanks(dev, state);
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drm_atomic_helper_cleanup_planes(dev, state);
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drm_atomic_state_free(state);
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return 0;
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}
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/**
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* intel_connector_atomic_get_property - fetch connector property value
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* @connector: connector to fetch property for
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* @state: state containing the property value
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* @property: property to look up
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* @val: pointer to write property value into
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*
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* The DRM core does not store shadow copies of properties for
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* atomic-capable drivers. This entrypoint is used to fetch
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* the current value of a driver-specific connector property.
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*/
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int
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intel_connector_atomic_get_property(struct drm_connector *connector,
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const struct drm_connector_state *state,
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struct drm_property *property,
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uint64_t *val)
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{
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int i;
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/*
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* TODO: We only have atomic modeset for planes at the moment, so the
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* crtc/connector code isn't quite ready yet. Until it's ready,
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* continue to look up all property values in the DRM's shadow copy
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* in obj->properties->values[].
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*
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* When the crtc/connector state work matures, this function should
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* be updated to read the values out of the state structure instead.
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*/
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for (i = 0; i < connector->base.properties->count; i++) {
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if (connector->base.properties->properties[i] == property) {
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*val = connector->base.properties->values[i];
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return 0;
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}
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}
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return -EINVAL;
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}
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/*
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* intel_crtc_duplicate_state - duplicate crtc state
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* @crtc: drm crtc
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*
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* Allocates and returns a copy of the crtc state (both common and
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* Intel-specific) for the specified crtc.
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*
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* Returns: The newly allocated crtc state, or NULL on failure.
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*/
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struct drm_crtc_state *
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intel_crtc_duplicate_state(struct drm_crtc *crtc)
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{
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struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
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struct intel_crtc_state *crtc_state;
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if (WARN_ON(!intel_crtc->config))
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crtc_state = kzalloc(sizeof(*crtc_state), GFP_KERNEL);
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else
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crtc_state = kmemdup(intel_crtc->config,
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sizeof(*intel_crtc->config), GFP_KERNEL);
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if (crtc_state)
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crtc_state->base.crtc = crtc;
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return &crtc_state->base;
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}
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/**
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* intel_crtc_destroy_state - destroy crtc state
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* @crtc: drm crtc
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*
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* Destroys the crtc state (both common and Intel-specific) for the
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* specified crtc.
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*/
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void
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intel_crtc_destroy_state(struct drm_crtc *crtc,
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struct drm_crtc_state *state)
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{
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drm_atomic_helper_crtc_destroy_state(crtc, state);
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}
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