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![Boris Brezillon](/assets/img/avatar_default.png)
One of the last remaining objects to not have its atomic state. This is being motivated by our attempt to support runtime bus-format negotiation between elements of the bridge chain. This patch just paves the road for such a feature by adding a new drm_bridge_state object inheriting from drm_private_obj so we can re-use some of the existing state initialization/tracking logic. v10: * Add changelog to the commit message v9: * Clarify the fact that the bridge->atomic_reset() and {connector,plane,crtc,...}->reset() semantics are different * Move the drm_atomic_private_obj_init() call back to drm_bridge_attach() * Check the presence of ->atomic_duplicate_state instead of ->atomic_reset in drm_atomic_add_encoder_bridges() * Fix copy&paste errors in the atomic bridge state helpers doc * Add A-b/R-b tags v8: * Move bridge state helpers out of the CONFIG_DEBUGFS section v7: * Move helpers, struct-defs, ... to atomic helper files to avoid the drm -> drm_kms_helper -> drm circular dep * Stop providing default implementation for atomic state reset, duplicate and destroy hooks (has to do with the helper/core split) * Drop all R-b/T-b as helpers have now be moved to other places v6: * Made helpers private, removed doc and moved them to satisfy dependencies * Renamed helpers to _default_ v5: * Re-introduced the helpers from v4 v4: * Fix the doc * Kill default helpers (inlined) * Fix drm_atomic_get_bridge_state() to check for an ERR_PTR() * Add Neil's R-b v3: * No changes v2: * Use drm_for_each_bridge_in_chain() * Rename helpers to be more consistent with the rest of the DRM API * Improve/fix the doc Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20200128135514.108171-2-boris.brezillon@collabora.com
1649 lines
50 KiB
C
1649 lines
50 KiB
C
/*
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* Copyright (C) 2014 Red Hat
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* Copyright (C) 2014 Intel Corp.
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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 shall be included in
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* all copies or substantial portions of the 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rob Clark <robdclark@gmail.com>
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* Daniel Vetter <daniel.vetter@ffwll.ch>
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*/
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#include <linux/sync_file.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_uapi.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_debugfs.h>
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#include <drm/drm_device.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_file.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_mode.h>
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#include <drm/drm_print.h>
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#include <drm/drm_writeback.h>
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#include "drm_crtc_internal.h"
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#include "drm_internal.h"
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void __drm_crtc_commit_free(struct kref *kref)
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{
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struct drm_crtc_commit *commit =
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container_of(kref, struct drm_crtc_commit, ref);
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kfree(commit);
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}
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EXPORT_SYMBOL(__drm_crtc_commit_free);
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/**
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* drm_atomic_state_default_release -
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* release memory initialized by drm_atomic_state_init
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* @state: atomic state
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*
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* Free all the memory allocated by drm_atomic_state_init.
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* This should only be used by drivers which are still subclassing
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* &drm_atomic_state and haven't switched to &drm_private_state yet.
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*/
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void drm_atomic_state_default_release(struct drm_atomic_state *state)
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{
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kfree(state->connectors);
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kfree(state->crtcs);
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kfree(state->planes);
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kfree(state->private_objs);
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}
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EXPORT_SYMBOL(drm_atomic_state_default_release);
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/**
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* drm_atomic_state_init - init new atomic state
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* @dev: DRM device
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* @state: atomic state
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*
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* Default implementation for filling in a new atomic state.
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* This should only be used by drivers which are still subclassing
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* &drm_atomic_state and haven't switched to &drm_private_state yet.
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*/
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int
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drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state)
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{
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kref_init(&state->ref);
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/* TODO legacy paths should maybe do a better job about
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* setting this appropriately?
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*/
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state->allow_modeset = true;
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state->crtcs = kcalloc(dev->mode_config.num_crtc,
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sizeof(*state->crtcs), GFP_KERNEL);
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if (!state->crtcs)
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goto fail;
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state->planes = kcalloc(dev->mode_config.num_total_plane,
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sizeof(*state->planes), GFP_KERNEL);
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if (!state->planes)
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goto fail;
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state->dev = dev;
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DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state);
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return 0;
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fail:
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drm_atomic_state_default_release(state);
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return -ENOMEM;
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}
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EXPORT_SYMBOL(drm_atomic_state_init);
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/**
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* drm_atomic_state_alloc - allocate atomic state
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* @dev: DRM device
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*
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* This allocates an empty atomic state to track updates.
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*/
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struct drm_atomic_state *
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drm_atomic_state_alloc(struct drm_device *dev)
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{
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struct drm_mode_config *config = &dev->mode_config;
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if (!config->funcs->atomic_state_alloc) {
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struct drm_atomic_state *state;
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state = kzalloc(sizeof(*state), GFP_KERNEL);
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if (!state)
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return NULL;
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if (drm_atomic_state_init(dev, state) < 0) {
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kfree(state);
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return NULL;
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}
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return state;
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}
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return config->funcs->atomic_state_alloc(dev);
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}
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EXPORT_SYMBOL(drm_atomic_state_alloc);
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/**
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* drm_atomic_state_default_clear - clear base atomic state
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* @state: atomic state
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*
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* Default implementation for clearing atomic state.
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* This should only be used by drivers which are still subclassing
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* &drm_atomic_state and haven't switched to &drm_private_state yet.
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*/
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void drm_atomic_state_default_clear(struct drm_atomic_state *state)
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{
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struct drm_device *dev = state->dev;
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struct drm_mode_config *config = &dev->mode_config;
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int i;
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DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state);
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for (i = 0; i < state->num_connector; i++) {
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struct drm_connector *connector = state->connectors[i].ptr;
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if (!connector)
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continue;
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connector->funcs->atomic_destroy_state(connector,
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state->connectors[i].state);
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state->connectors[i].ptr = NULL;
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state->connectors[i].state = NULL;
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state->connectors[i].old_state = NULL;
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state->connectors[i].new_state = NULL;
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drm_connector_put(connector);
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}
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for (i = 0; i < config->num_crtc; i++) {
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struct drm_crtc *crtc = state->crtcs[i].ptr;
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if (!crtc)
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continue;
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crtc->funcs->atomic_destroy_state(crtc,
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state->crtcs[i].state);
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state->crtcs[i].ptr = NULL;
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state->crtcs[i].state = NULL;
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state->crtcs[i].old_state = NULL;
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state->crtcs[i].new_state = NULL;
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if (state->crtcs[i].commit) {
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drm_crtc_commit_put(state->crtcs[i].commit);
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state->crtcs[i].commit = NULL;
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}
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}
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for (i = 0; i < config->num_total_plane; i++) {
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struct drm_plane *plane = state->planes[i].ptr;
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if (!plane)
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continue;
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plane->funcs->atomic_destroy_state(plane,
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state->planes[i].state);
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state->planes[i].ptr = NULL;
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state->planes[i].state = NULL;
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state->planes[i].old_state = NULL;
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state->planes[i].new_state = NULL;
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}
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for (i = 0; i < state->num_private_objs; i++) {
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struct drm_private_obj *obj = state->private_objs[i].ptr;
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obj->funcs->atomic_destroy_state(obj,
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state->private_objs[i].state);
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state->private_objs[i].ptr = NULL;
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state->private_objs[i].state = NULL;
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state->private_objs[i].old_state = NULL;
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state->private_objs[i].new_state = NULL;
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}
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state->num_private_objs = 0;
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if (state->fake_commit) {
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drm_crtc_commit_put(state->fake_commit);
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state->fake_commit = NULL;
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}
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}
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EXPORT_SYMBOL(drm_atomic_state_default_clear);
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/**
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* drm_atomic_state_clear - clear state object
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* @state: atomic state
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*
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* When the w/w mutex algorithm detects a deadlock we need to back off and drop
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* all locks. So someone else could sneak in and change the current modeset
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* configuration. Which means that all the state assembled in @state is no
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* longer an atomic update to the current state, but to some arbitrary earlier
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* state. Which could break assumptions the driver's
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* &drm_mode_config_funcs.atomic_check likely relies on.
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*
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* Hence we must clear all cached state and completely start over, using this
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* function.
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*/
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void drm_atomic_state_clear(struct drm_atomic_state *state)
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{
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struct drm_device *dev = state->dev;
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struct drm_mode_config *config = &dev->mode_config;
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if (config->funcs->atomic_state_clear)
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config->funcs->atomic_state_clear(state);
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else
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drm_atomic_state_default_clear(state);
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}
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EXPORT_SYMBOL(drm_atomic_state_clear);
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/**
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* __drm_atomic_state_free - free all memory for an atomic state
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* @ref: This atomic state to deallocate
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*
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* This frees all memory associated with an atomic state, including all the
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* per-object state for planes, CRTCs and connectors.
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*/
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void __drm_atomic_state_free(struct kref *ref)
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{
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struct drm_atomic_state *state = container_of(ref, typeof(*state), ref);
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struct drm_mode_config *config = &state->dev->mode_config;
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drm_atomic_state_clear(state);
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DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state);
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if (config->funcs->atomic_state_free) {
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config->funcs->atomic_state_free(state);
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} else {
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drm_atomic_state_default_release(state);
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kfree(state);
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}
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}
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EXPORT_SYMBOL(__drm_atomic_state_free);
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/**
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* drm_atomic_get_crtc_state - get CRTC state
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* @state: global atomic state object
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* @crtc: CRTC to get state object for
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*
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* This function returns the CRTC state for the given CRTC, allocating it if
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* needed. It will also grab the relevant CRTC lock to make sure that the state
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* is consistent.
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*
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* Returns:
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*
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* Either the allocated state or the error code encoded into the pointer. When
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* the error is EDEADLK then the w/w mutex code has detected a deadlock and the
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* entire atomic sequence must be restarted. All other errors are fatal.
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*/
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struct drm_crtc_state *
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drm_atomic_get_crtc_state(struct drm_atomic_state *state,
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struct drm_crtc *crtc)
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{
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int ret, index = drm_crtc_index(crtc);
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struct drm_crtc_state *crtc_state;
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WARN_ON(!state->acquire_ctx);
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crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
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if (crtc_state)
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return crtc_state;
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ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx);
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if (ret)
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return ERR_PTR(ret);
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crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
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if (!crtc_state)
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return ERR_PTR(-ENOMEM);
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state->crtcs[index].state = crtc_state;
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state->crtcs[index].old_state = crtc->state;
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state->crtcs[index].new_state = crtc_state;
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state->crtcs[index].ptr = crtc;
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crtc_state->state = state;
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DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
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crtc->base.id, crtc->name, crtc_state, state);
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return crtc_state;
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}
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EXPORT_SYMBOL(drm_atomic_get_crtc_state);
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static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state,
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const struct drm_crtc_state *new_crtc_state)
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{
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struct drm_crtc *crtc = new_crtc_state->crtc;
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/* NOTE: we explicitly don't enforce constraints such as primary
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* layer covering entire screen, since that is something we want
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* to allow (on hw that supports it). For hw that does not, it
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* should be checked in driver's crtc->atomic_check() vfunc.
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*
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* TODO: Add generic modeset state checks once we support those.
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*/
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if (new_crtc_state->active && !new_crtc_state->enable) {
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DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
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crtc->base.id, crtc->name);
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return -EINVAL;
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}
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/* The state->enable vs. state->mode_blob checks can be WARN_ON,
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* as this is a kernel-internal detail that userspace should never
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* be able to trigger. */
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if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
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WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) {
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DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
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crtc->base.id, crtc->name);
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return -EINVAL;
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}
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if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
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WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) {
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DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
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crtc->base.id, crtc->name);
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return -EINVAL;
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}
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/*
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* Reject event generation for when a CRTC is off and stays off.
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* It wouldn't be hard to implement this, but userspace has a track
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* record of happily burning through 100% cpu (or worse, crash) when the
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* display pipe is suspended. To avoid all that fun just reject updates
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* that ask for events since likely that indicates a bug in the
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* compositor's drawing loop. This is consistent with the vblank IOCTL
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* and legacy page_flip IOCTL which also reject service on a disabled
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* pipe.
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*/
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if (new_crtc_state->event &&
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!new_crtc_state->active && !old_crtc_state->active) {
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DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n",
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crtc->base.id, crtc->name);
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return -EINVAL;
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}
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return 0;
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}
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static void drm_atomic_crtc_print_state(struct drm_printer *p,
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const struct drm_crtc_state *state)
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{
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struct drm_crtc *crtc = state->crtc;
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drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
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drm_printf(p, "\tenable=%d\n", state->enable);
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drm_printf(p, "\tactive=%d\n", state->active);
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drm_printf(p, "\tself_refresh_active=%d\n", state->self_refresh_active);
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drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
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drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
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drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
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drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
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drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
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drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
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drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
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drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
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drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
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if (crtc->funcs->atomic_print_state)
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crtc->funcs->atomic_print_state(p, state);
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}
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static int drm_atomic_connector_check(struct drm_connector *connector,
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struct drm_connector_state *state)
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{
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struct drm_crtc_state *crtc_state;
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struct drm_writeback_job *writeback_job = state->writeback_job;
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const struct drm_display_info *info = &connector->display_info;
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state->max_bpc = info->bpc ? info->bpc : 8;
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if (connector->max_bpc_property)
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state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
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if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job)
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return 0;
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if (writeback_job->fb && !state->crtc) {
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DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n",
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connector->base.id, connector->name);
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return -EINVAL;
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}
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if (state->crtc)
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crtc_state = drm_atomic_get_existing_crtc_state(state->state,
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state->crtc);
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if (writeback_job->fb && !crtc_state->active) {
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DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n",
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connector->base.id, connector->name,
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state->crtc->base.id);
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return -EINVAL;
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}
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|
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if (!writeback_job->fb) {
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if (writeback_job->out_fence) {
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DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n",
|
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connector->base.id, connector->name);
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return -EINVAL;
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}
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|
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drm_writeback_cleanup_job(writeback_job);
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state->writeback_job = NULL;
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}
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|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_plane_state - get plane state
|
|
* @state: global atomic state object
|
|
* @plane: plane to get state object for
|
|
*
|
|
* This function returns the plane state for the given plane, allocating it if
|
|
* needed. It will also grab the relevant plane lock to make sure that the state
|
|
* is consistent.
|
|
*
|
|
* Returns:
|
|
*
|
|
* Either the allocated state or the error code encoded into the pointer. When
|
|
* the error is EDEADLK then the w/w mutex code has detected a deadlock and the
|
|
* entire atomic sequence must be restarted. All other errors are fatal.
|
|
*/
|
|
struct drm_plane_state *
|
|
drm_atomic_get_plane_state(struct drm_atomic_state *state,
|
|
struct drm_plane *plane)
|
|
{
|
|
int ret, index = drm_plane_index(plane);
|
|
struct drm_plane_state *plane_state;
|
|
|
|
WARN_ON(!state->acquire_ctx);
|
|
|
|
/* the legacy pointers should never be set */
|
|
WARN_ON(plane->fb);
|
|
WARN_ON(plane->old_fb);
|
|
WARN_ON(plane->crtc);
|
|
|
|
plane_state = drm_atomic_get_existing_plane_state(state, plane);
|
|
if (plane_state)
|
|
return plane_state;
|
|
|
|
ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
plane_state = plane->funcs->atomic_duplicate_state(plane);
|
|
if (!plane_state)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
state->planes[index].state = plane_state;
|
|
state->planes[index].ptr = plane;
|
|
state->planes[index].old_state = plane->state;
|
|
state->planes[index].new_state = plane_state;
|
|
plane_state->state = state;
|
|
|
|
DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n",
|
|
plane->base.id, plane->name, plane_state, state);
|
|
|
|
if (plane_state->crtc) {
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state,
|
|
plane_state->crtc);
|
|
if (IS_ERR(crtc_state))
|
|
return ERR_CAST(crtc_state);
|
|
}
|
|
|
|
return plane_state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_plane_state);
|
|
|
|
static bool
|
|
plane_switching_crtc(const struct drm_plane_state *old_plane_state,
|
|
const struct drm_plane_state *new_plane_state)
|
|
{
|
|
if (!old_plane_state->crtc || !new_plane_state->crtc)
|
|
return false;
|
|
|
|
if (old_plane_state->crtc == new_plane_state->crtc)
|
|
return false;
|
|
|
|
/* This could be refined, but currently there's no helper or driver code
|
|
* to implement direct switching of active planes nor userspace to take
|
|
* advantage of more direct plane switching without the intermediate
|
|
* full OFF state.
|
|
*/
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_plane_check - check plane state
|
|
* @old_plane_state: old plane state to check
|
|
* @new_plane_state: new plane state to check
|
|
*
|
|
* Provides core sanity checks for plane state.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, error code on failure
|
|
*/
|
|
static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
|
|
const struct drm_plane_state *new_plane_state)
|
|
{
|
|
struct drm_plane *plane = new_plane_state->plane;
|
|
struct drm_crtc *crtc = new_plane_state->crtc;
|
|
const struct drm_framebuffer *fb = new_plane_state->fb;
|
|
unsigned int fb_width, fb_height;
|
|
struct drm_mode_rect *clips;
|
|
uint32_t num_clips;
|
|
int ret;
|
|
|
|
/* either *both* CRTC and FB must be set, or neither */
|
|
if (crtc && !fb) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n",
|
|
plane->base.id, plane->name);
|
|
return -EINVAL;
|
|
} else if (fb && !crtc) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n",
|
|
plane->base.id, plane->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* if disabled, we don't care about the rest of the state: */
|
|
if (!crtc)
|
|
return 0;
|
|
|
|
/* Check whether this plane is usable on this CRTC */
|
|
if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
|
|
DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n",
|
|
crtc->base.id, crtc->name,
|
|
plane->base.id, plane->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Check whether this plane supports the fb pixel format. */
|
|
ret = drm_plane_check_pixel_format(plane, fb->format->format,
|
|
fb->modifier);
|
|
if (ret) {
|
|
struct drm_format_name_buf format_name;
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n",
|
|
plane->base.id, plane->name,
|
|
drm_get_format_name(fb->format->format,
|
|
&format_name),
|
|
fb->modifier);
|
|
return ret;
|
|
}
|
|
|
|
/* Give drivers some help against integer overflows */
|
|
if (new_plane_state->crtc_w > INT_MAX ||
|
|
new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w ||
|
|
new_plane_state->crtc_h > INT_MAX ||
|
|
new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n",
|
|
plane->base.id, plane->name,
|
|
new_plane_state->crtc_w, new_plane_state->crtc_h,
|
|
new_plane_state->crtc_x, new_plane_state->crtc_y);
|
|
return -ERANGE;
|
|
}
|
|
|
|
fb_width = fb->width << 16;
|
|
fb_height = fb->height << 16;
|
|
|
|
/* Make sure source coordinates are inside the fb. */
|
|
if (new_plane_state->src_w > fb_width ||
|
|
new_plane_state->src_x > fb_width - new_plane_state->src_w ||
|
|
new_plane_state->src_h > fb_height ||
|
|
new_plane_state->src_y > fb_height - new_plane_state->src_h) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates "
|
|
"%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
|
|
plane->base.id, plane->name,
|
|
new_plane_state->src_w >> 16,
|
|
((new_plane_state->src_w & 0xffff) * 15625) >> 10,
|
|
new_plane_state->src_h >> 16,
|
|
((new_plane_state->src_h & 0xffff) * 15625) >> 10,
|
|
new_plane_state->src_x >> 16,
|
|
((new_plane_state->src_x & 0xffff) * 15625) >> 10,
|
|
new_plane_state->src_y >> 16,
|
|
((new_plane_state->src_y & 0xffff) * 15625) >> 10,
|
|
fb->width, fb->height);
|
|
return -ENOSPC;
|
|
}
|
|
|
|
clips = drm_plane_get_damage_clips(new_plane_state);
|
|
num_clips = drm_plane_get_damage_clips_count(new_plane_state);
|
|
|
|
/* Make sure damage clips are valid and inside the fb. */
|
|
while (num_clips > 0) {
|
|
if (clips->x1 >= clips->x2 ||
|
|
clips->y1 >= clips->y2 ||
|
|
clips->x1 < 0 ||
|
|
clips->y1 < 0 ||
|
|
clips->x2 > fb_width ||
|
|
clips->y2 > fb_height) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n",
|
|
plane->base.id, plane->name, clips->x1,
|
|
clips->y1, clips->x2, clips->y2);
|
|
return -EINVAL;
|
|
}
|
|
clips++;
|
|
num_clips--;
|
|
}
|
|
|
|
if (plane_switching_crtc(old_plane_state, new_plane_state)) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n",
|
|
plane->base.id, plane->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void drm_atomic_plane_print_state(struct drm_printer *p,
|
|
const struct drm_plane_state *state)
|
|
{
|
|
struct drm_plane *plane = state->plane;
|
|
struct drm_rect src = drm_plane_state_src(state);
|
|
struct drm_rect dest = drm_plane_state_dest(state);
|
|
|
|
drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
|
|
drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
|
|
drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
|
|
if (state->fb)
|
|
drm_framebuffer_print_info(p, 2, state->fb);
|
|
drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
|
|
drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
|
|
drm_printf(p, "\trotation=%x\n", state->rotation);
|
|
drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos);
|
|
drm_printf(p, "\tcolor-encoding=%s\n",
|
|
drm_get_color_encoding_name(state->color_encoding));
|
|
drm_printf(p, "\tcolor-range=%s\n",
|
|
drm_get_color_range_name(state->color_range));
|
|
|
|
if (plane->funcs->atomic_print_state)
|
|
plane->funcs->atomic_print_state(p, state);
|
|
}
|
|
|
|
/**
|
|
* DOC: handling driver private state
|
|
*
|
|
* Very often the DRM objects exposed to userspace in the atomic modeset api
|
|
* (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the
|
|
* underlying hardware. Especially for any kind of shared resources (e.g. shared
|
|
* clocks, scaler units, bandwidth and fifo limits shared among a group of
|
|
* planes or CRTCs, and so on) it makes sense to model these as independent
|
|
* objects. Drivers then need to do similar state tracking and commit ordering for
|
|
* such private (since not exposed to userpace) objects as the atomic core and
|
|
* helpers already provide for connectors, planes and CRTCs.
|
|
*
|
|
* To make this easier on drivers the atomic core provides some support to track
|
|
* driver private state objects using struct &drm_private_obj, with the
|
|
* associated state struct &drm_private_state.
|
|
*
|
|
* Similar to userspace-exposed objects, private state structures can be
|
|
* acquired by calling drm_atomic_get_private_obj_state(). This also takes care
|
|
* of locking, hence drivers should not have a need to call drm_modeset_lock()
|
|
* directly. Sequence of the actual hardware state commit is not handled,
|
|
* drivers might need to keep track of struct drm_crtc_commit within subclassed
|
|
* structure of &drm_private_state as necessary, e.g. similar to
|
|
* &drm_plane_state.commit. See also &drm_atomic_state.fake_commit.
|
|
*
|
|
* All private state structures contained in a &drm_atomic_state update can be
|
|
* iterated using for_each_oldnew_private_obj_in_state(),
|
|
* for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state().
|
|
* Drivers are recommended to wrap these for each type of driver private state
|
|
* object they have, filtering on &drm_private_obj.funcs using for_each_if(), at
|
|
* least if they want to iterate over all objects of a given type.
|
|
*
|
|
* An earlier way to handle driver private state was by subclassing struct
|
|
* &drm_atomic_state. But since that encourages non-standard ways to implement
|
|
* the check/commit split atomic requires (by using e.g. "check and rollback or
|
|
* commit instead" of "duplicate state, check, then either commit or release
|
|
* duplicated state) it is deprecated in favour of using &drm_private_state.
|
|
*/
|
|
|
|
/**
|
|
* drm_atomic_private_obj_init - initialize private object
|
|
* @dev: DRM device this object will be attached to
|
|
* @obj: private object
|
|
* @state: initial private object state
|
|
* @funcs: pointer to the struct of function pointers that identify the object
|
|
* type
|
|
*
|
|
* Initialize the private object, which can be embedded into any
|
|
* driver private object that needs its own atomic state.
|
|
*/
|
|
void
|
|
drm_atomic_private_obj_init(struct drm_device *dev,
|
|
struct drm_private_obj *obj,
|
|
struct drm_private_state *state,
|
|
const struct drm_private_state_funcs *funcs)
|
|
{
|
|
memset(obj, 0, sizeof(*obj));
|
|
|
|
drm_modeset_lock_init(&obj->lock);
|
|
|
|
obj->state = state;
|
|
obj->funcs = funcs;
|
|
list_add_tail(&obj->head, &dev->mode_config.privobj_list);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_private_obj_init);
|
|
|
|
/**
|
|
* drm_atomic_private_obj_fini - finalize private object
|
|
* @obj: private object
|
|
*
|
|
* Finalize the private object.
|
|
*/
|
|
void
|
|
drm_atomic_private_obj_fini(struct drm_private_obj *obj)
|
|
{
|
|
list_del(&obj->head);
|
|
obj->funcs->atomic_destroy_state(obj, obj->state);
|
|
drm_modeset_lock_fini(&obj->lock);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_private_obj_fini);
|
|
|
|
/**
|
|
* drm_atomic_get_private_obj_state - get private object state
|
|
* @state: global atomic state
|
|
* @obj: private object to get the state for
|
|
*
|
|
* This function returns the private object state for the given private object,
|
|
* allocating the state if needed. It will also grab the relevant private
|
|
* object lock to make sure that the state is consistent.
|
|
*
|
|
* RETURNS:
|
|
*
|
|
* Either the allocated state or the error code encoded into a pointer.
|
|
*/
|
|
struct drm_private_state *
|
|
drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj)
|
|
{
|
|
int index, num_objs, i, ret;
|
|
size_t size;
|
|
struct __drm_private_objs_state *arr;
|
|
struct drm_private_state *obj_state;
|
|
|
|
for (i = 0; i < state->num_private_objs; i++)
|
|
if (obj == state->private_objs[i].ptr)
|
|
return state->private_objs[i].state;
|
|
|
|
ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
num_objs = state->num_private_objs + 1;
|
|
size = sizeof(*state->private_objs) * num_objs;
|
|
arr = krealloc(state->private_objs, size, GFP_KERNEL);
|
|
if (!arr)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
state->private_objs = arr;
|
|
index = state->num_private_objs;
|
|
memset(&state->private_objs[index], 0, sizeof(*state->private_objs));
|
|
|
|
obj_state = obj->funcs->atomic_duplicate_state(obj);
|
|
if (!obj_state)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
state->private_objs[index].state = obj_state;
|
|
state->private_objs[index].old_state = obj->state;
|
|
state->private_objs[index].new_state = obj_state;
|
|
state->private_objs[index].ptr = obj;
|
|
obj_state->state = state;
|
|
|
|
state->num_private_objs = num_objs;
|
|
|
|
DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n",
|
|
obj, obj_state, state);
|
|
|
|
return obj_state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_private_obj_state);
|
|
|
|
/**
|
|
* drm_atomic_get_old_private_obj_state
|
|
* @state: global atomic state object
|
|
* @obj: private_obj to grab
|
|
*
|
|
* This function returns the old private object state for the given private_obj,
|
|
* or NULL if the private_obj is not part of the global atomic state.
|
|
*/
|
|
struct drm_private_state *
|
|
drm_atomic_get_old_private_obj_state(struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < state->num_private_objs; i++)
|
|
if (obj == state->private_objs[i].ptr)
|
|
return state->private_objs[i].old_state;
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_old_private_obj_state);
|
|
|
|
/**
|
|
* drm_atomic_get_new_private_obj_state
|
|
* @state: global atomic state object
|
|
* @obj: private_obj to grab
|
|
*
|
|
* This function returns the new private object state for the given private_obj,
|
|
* or NULL if the private_obj is not part of the global atomic state.
|
|
*/
|
|
struct drm_private_state *
|
|
drm_atomic_get_new_private_obj_state(struct drm_atomic_state *state,
|
|
struct drm_private_obj *obj)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < state->num_private_objs; i++)
|
|
if (obj == state->private_objs[i].ptr)
|
|
return state->private_objs[i].new_state;
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_new_private_obj_state);
|
|
|
|
/**
|
|
* drm_atomic_get_old_connector_for_encoder - Get old connector for an encoder
|
|
* @state: Atomic state
|
|
* @encoder: The encoder to fetch the connector state for
|
|
*
|
|
* This function finds and returns the connector that was connected to @encoder
|
|
* as specified by the @state.
|
|
*
|
|
* If there is no connector in @state which previously had @encoder connected to
|
|
* it, this function will return NULL. While this may seem like an invalid use
|
|
* case, it is sometimes useful to differentiate commits which had no prior
|
|
* connectors attached to @encoder vs ones that did (and to inspect their
|
|
* state). This is especially true in enable hooks because the pipeline has
|
|
* changed.
|
|
*
|
|
* Returns: The old connector connected to @encoder, or NULL if the encoder is
|
|
* not connected.
|
|
*/
|
|
struct drm_connector *
|
|
drm_atomic_get_old_connector_for_encoder(struct drm_atomic_state *state,
|
|
struct drm_encoder *encoder)
|
|
{
|
|
struct drm_connector_state *conn_state;
|
|
struct drm_connector *connector;
|
|
unsigned int i;
|
|
|
|
for_each_old_connector_in_state(state, connector, conn_state, i) {
|
|
if (conn_state->best_encoder == encoder)
|
|
return connector;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_old_connector_for_encoder);
|
|
|
|
/**
|
|
* drm_atomic_get_new_connector_for_encoder - Get new connector for an encoder
|
|
* @state: Atomic state
|
|
* @encoder: The encoder to fetch the connector state for
|
|
*
|
|
* This function finds and returns the connector that will be connected to
|
|
* @encoder as specified by the @state.
|
|
*
|
|
* If there is no connector in @state which will have @encoder connected to it,
|
|
* this function will return NULL. While this may seem like an invalid use case,
|
|
* it is sometimes useful to differentiate commits which have no connectors
|
|
* attached to @encoder vs ones that do (and to inspect their state). This is
|
|
* especially true in disable hooks because the pipeline will change.
|
|
*
|
|
* Returns: The new connector connected to @encoder, or NULL if the encoder is
|
|
* not connected.
|
|
*/
|
|
struct drm_connector *
|
|
drm_atomic_get_new_connector_for_encoder(struct drm_atomic_state *state,
|
|
struct drm_encoder *encoder)
|
|
{
|
|
struct drm_connector_state *conn_state;
|
|
struct drm_connector *connector;
|
|
unsigned int i;
|
|
|
|
for_each_new_connector_in_state(state, connector, conn_state, i) {
|
|
if (conn_state->best_encoder == encoder)
|
|
return connector;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_new_connector_for_encoder);
|
|
|
|
/**
|
|
* drm_atomic_get_connector_state - get connector state
|
|
* @state: global atomic state object
|
|
* @connector: connector to get state object for
|
|
*
|
|
* This function returns the connector state for the given connector,
|
|
* allocating it if needed. It will also grab the relevant connector lock to
|
|
* make sure that the state is consistent.
|
|
*
|
|
* Returns:
|
|
*
|
|
* Either the allocated state or the error code encoded into the pointer. When
|
|
* the error is EDEADLK then the w/w mutex code has detected a deadlock and the
|
|
* entire atomic sequence must be restarted. All other errors are fatal.
|
|
*/
|
|
struct drm_connector_state *
|
|
drm_atomic_get_connector_state(struct drm_atomic_state *state,
|
|
struct drm_connector *connector)
|
|
{
|
|
int ret, index;
|
|
struct drm_mode_config *config = &connector->dev->mode_config;
|
|
struct drm_connector_state *connector_state;
|
|
|
|
WARN_ON(!state->acquire_ctx);
|
|
|
|
ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
index = drm_connector_index(connector);
|
|
|
|
if (index >= state->num_connector) {
|
|
struct __drm_connnectors_state *c;
|
|
int alloc = max(index + 1, config->num_connector);
|
|
|
|
c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL);
|
|
if (!c)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
state->connectors = c;
|
|
memset(&state->connectors[state->num_connector], 0,
|
|
sizeof(*state->connectors) * (alloc - state->num_connector));
|
|
|
|
state->num_connector = alloc;
|
|
}
|
|
|
|
if (state->connectors[index].state)
|
|
return state->connectors[index].state;
|
|
|
|
connector_state = connector->funcs->atomic_duplicate_state(connector);
|
|
if (!connector_state)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
drm_connector_get(connector);
|
|
state->connectors[index].state = connector_state;
|
|
state->connectors[index].old_state = connector->state;
|
|
state->connectors[index].new_state = connector_state;
|
|
state->connectors[index].ptr = connector;
|
|
connector_state->state = state;
|
|
|
|
DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n",
|
|
connector->base.id, connector->name,
|
|
connector_state, state);
|
|
|
|
if (connector_state->crtc) {
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state,
|
|
connector_state->crtc);
|
|
if (IS_ERR(crtc_state))
|
|
return ERR_CAST(crtc_state);
|
|
}
|
|
|
|
return connector_state;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_connector_state);
|
|
|
|
static void drm_atomic_connector_print_state(struct drm_printer *p,
|
|
const struct drm_connector_state *state)
|
|
{
|
|
struct drm_connector *connector = state->connector;
|
|
|
|
drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
|
|
drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
|
|
drm_printf(p, "\tself_refresh_aware=%d\n", state->self_refresh_aware);
|
|
|
|
if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
|
|
if (state->writeback_job && state->writeback_job->fb)
|
|
drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
|
|
|
|
if (connector->funcs->atomic_print_state)
|
|
connector->funcs->atomic_print_state(p, state);
|
|
}
|
|
|
|
/**
|
|
* drm_atomic_get_bridge_state - get bridge state
|
|
* @state: global atomic state object
|
|
* @bridge: bridge to get state object for
|
|
*
|
|
* This function returns the bridge state for the given bridge, allocating it
|
|
* if needed. It will also grab the relevant bridge lock to make sure that the
|
|
* state is consistent.
|
|
*
|
|
* Returns:
|
|
*
|
|
* Either the allocated state or the error code encoded into the pointer. When
|
|
* the error is EDEADLK then the w/w mutex code has detected a deadlock and the
|
|
* entire atomic sequence must be restarted.
|
|
*/
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_bridge_state(struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge)
|
|
{
|
|
struct drm_private_state *obj_state;
|
|
|
|
obj_state = drm_atomic_get_private_obj_state(state, &bridge->base);
|
|
if (IS_ERR(obj_state))
|
|
return ERR_CAST(obj_state);
|
|
|
|
return drm_priv_to_bridge_state(obj_state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_bridge_state);
|
|
|
|
/**
|
|
* drm_atomic_get_old_bridge_state - get old bridge state, if it exists
|
|
* @state: global atomic state object
|
|
* @bridge: bridge to grab
|
|
*
|
|
* This function returns the old bridge state for the given bridge, or NULL if
|
|
* the bridge is not part of the global atomic state.
|
|
*/
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_old_bridge_state(struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge)
|
|
{
|
|
struct drm_private_state *obj_state;
|
|
|
|
obj_state = drm_atomic_get_old_private_obj_state(state, &bridge->base);
|
|
if (!obj_state)
|
|
return NULL;
|
|
|
|
return drm_priv_to_bridge_state(obj_state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_old_bridge_state);
|
|
|
|
/**
|
|
* drm_atomic_get_new_bridge_state - get new bridge state, if it exists
|
|
* @state: global atomic state object
|
|
* @bridge: bridge to grab
|
|
*
|
|
* This function returns the new bridge state for the given bridge, or NULL if
|
|
* the bridge is not part of the global atomic state.
|
|
*/
|
|
struct drm_bridge_state *
|
|
drm_atomic_get_new_bridge_state(struct drm_atomic_state *state,
|
|
struct drm_bridge *bridge)
|
|
{
|
|
struct drm_private_state *obj_state;
|
|
|
|
obj_state = drm_atomic_get_new_private_obj_state(state, &bridge->base);
|
|
if (!obj_state)
|
|
return NULL;
|
|
|
|
return drm_priv_to_bridge_state(obj_state);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_get_new_bridge_state);
|
|
|
|
/**
|
|
* drm_atomic_add_encoder_bridges - add bridges attached to an encoder
|
|
* @state: atomic state
|
|
* @encoder: DRM encoder
|
|
*
|
|
* This function adds all bridges attached to @encoder. This is needed to add
|
|
* bridge states to @state and make them available when
|
|
* &bridge_funcs.atomic_{check,pre_enable,enable,disable_post_disable}() are
|
|
* called
|
|
*
|
|
* Returns:
|
|
* 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
|
|
* then the w/w mutex code has detected a deadlock and the entire atomic
|
|
* sequence must be restarted. All other errors are fatal.
|
|
*/
|
|
int
|
|
drm_atomic_add_encoder_bridges(struct drm_atomic_state *state,
|
|
struct drm_encoder *encoder)
|
|
{
|
|
struct drm_bridge_state *bridge_state;
|
|
struct drm_bridge *bridge;
|
|
|
|
if (!encoder)
|
|
return 0;
|
|
|
|
DRM_DEBUG_ATOMIC("Adding all bridges for [encoder:%d:%s] to %p\n",
|
|
encoder->base.id, encoder->name, state);
|
|
|
|
drm_for_each_bridge_in_chain(encoder, bridge) {
|
|
/* Skip bridges that don't implement the atomic state hooks. */
|
|
if (!bridge->funcs->atomic_duplicate_state)
|
|
continue;
|
|
|
|
bridge_state = drm_atomic_get_bridge_state(state, bridge);
|
|
if (IS_ERR(bridge_state))
|
|
return PTR_ERR(bridge_state);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_add_encoder_bridges);
|
|
|
|
/**
|
|
* drm_atomic_add_affected_connectors - add connectors for CRTC
|
|
* @state: atomic state
|
|
* @crtc: DRM CRTC
|
|
*
|
|
* This function walks the current configuration and adds all connectors
|
|
* currently using @crtc to the atomic configuration @state. Note that this
|
|
* function must acquire the connection mutex. This can potentially cause
|
|
* unneeded seralization if the update is just for the planes on one CRTC. Hence
|
|
* drivers and helpers should only call this when really needed (e.g. when a
|
|
* full modeset needs to happen due to some change).
|
|
*
|
|
* Returns:
|
|
* 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
|
|
* then the w/w mutex code has detected a deadlock and the entire atomic
|
|
* sequence must be restarted. All other errors are fatal.
|
|
*/
|
|
int
|
|
drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
struct drm_mode_config *config = &state->dev->mode_config;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_state *conn_state;
|
|
struct drm_connector_list_iter conn_iter;
|
|
struct drm_crtc_state *crtc_state;
|
|
int ret;
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
if (IS_ERR(crtc_state))
|
|
return PTR_ERR(crtc_state);
|
|
|
|
ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
|
|
crtc->base.id, crtc->name, state);
|
|
|
|
/*
|
|
* Changed connectors are already in @state, so only need to look
|
|
* at the connector_mask in crtc_state.
|
|
*/
|
|
drm_connector_list_iter_begin(state->dev, &conn_iter);
|
|
drm_for_each_connector_iter(connector, &conn_iter) {
|
|
if (!(crtc_state->connector_mask & drm_connector_mask(connector)))
|
|
continue;
|
|
|
|
conn_state = drm_atomic_get_connector_state(state, connector);
|
|
if (IS_ERR(conn_state)) {
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
return PTR_ERR(conn_state);
|
|
}
|
|
}
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_add_affected_connectors);
|
|
|
|
/**
|
|
* drm_atomic_add_affected_planes - add planes for CRTC
|
|
* @state: atomic state
|
|
* @crtc: DRM CRTC
|
|
*
|
|
* This function walks the current configuration and adds all planes
|
|
* currently used by @crtc to the atomic configuration @state. This is useful
|
|
* when an atomic commit also needs to check all currently enabled plane on
|
|
* @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC
|
|
* to avoid special code to force-enable all planes.
|
|
*
|
|
* Since acquiring a plane state will always also acquire the w/w mutex of the
|
|
* current CRTC for that plane (if there is any) adding all the plane states for
|
|
* a CRTC will not reduce parallism of atomic updates.
|
|
*
|
|
* Returns:
|
|
* 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK
|
|
* then the w/w mutex code has detected a deadlock and the entire atomic
|
|
* sequence must be restarted. All other errors are fatal.
|
|
*/
|
|
int
|
|
drm_atomic_add_affected_planes(struct drm_atomic_state *state,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
const struct drm_crtc_state *old_crtc_state =
|
|
drm_atomic_get_old_crtc_state(state, crtc);
|
|
struct drm_plane *plane;
|
|
|
|
WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
|
|
|
|
DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n",
|
|
crtc->base.id, crtc->name, state);
|
|
|
|
drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) {
|
|
struct drm_plane_state *plane_state =
|
|
drm_atomic_get_plane_state(state, plane);
|
|
|
|
if (IS_ERR(plane_state))
|
|
return PTR_ERR(plane_state);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_add_affected_planes);
|
|
|
|
/**
|
|
* drm_atomic_check_only - check whether a given config would work
|
|
* @state: atomic configuration to check
|
|
*
|
|
* Note that this function can return -EDEADLK if the driver needed to acquire
|
|
* more locks but encountered a deadlock. The caller must then do the usual w/w
|
|
* backoff dance and restart. All other errors are fatal.
|
|
*
|
|
* Returns:
|
|
* 0 on success, negative error code on failure.
|
|
*/
|
|
int drm_atomic_check_only(struct drm_atomic_state *state)
|
|
{
|
|
struct drm_device *dev = state->dev;
|
|
struct drm_mode_config *config = &dev->mode_config;
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *old_plane_state;
|
|
struct drm_plane_state *new_plane_state;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *old_crtc_state;
|
|
struct drm_crtc_state *new_crtc_state;
|
|
struct drm_connector *conn;
|
|
struct drm_connector_state *conn_state;
|
|
int i, ret = 0;
|
|
|
|
DRM_DEBUG_ATOMIC("checking %p\n", state);
|
|
|
|
for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
|
|
ret = drm_atomic_plane_check(old_plane_state, new_plane_state);
|
|
if (ret) {
|
|
DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n",
|
|
plane->base.id, plane->name);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
|
|
ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state);
|
|
if (ret) {
|
|
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
|
|
crtc->base.id, crtc->name);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
for_each_new_connector_in_state(state, conn, conn_state, i) {
|
|
ret = drm_atomic_connector_check(conn, conn_state);
|
|
if (ret) {
|
|
DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n",
|
|
conn->base.id, conn->name);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (config->funcs->atomic_check) {
|
|
ret = config->funcs->atomic_check(state->dev, state);
|
|
|
|
if (ret) {
|
|
DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n",
|
|
state, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (!state->allow_modeset) {
|
|
for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
|
if (drm_atomic_crtc_needs_modeset(new_crtc_state)) {
|
|
DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
|
|
crtc->base.id, crtc->name);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_check_only);
|
|
|
|
/**
|
|
* drm_atomic_commit - commit configuration atomically
|
|
* @state: atomic configuration to check
|
|
*
|
|
* Note that this function can return -EDEADLK if the driver needed to acquire
|
|
* more locks but encountered a deadlock. The caller must then do the usual w/w
|
|
* backoff dance and restart. All other errors are fatal.
|
|
*
|
|
* This function will take its own reference on @state.
|
|
* Callers should always release their reference with drm_atomic_state_put().
|
|
*
|
|
* Returns:
|
|
* 0 on success, negative error code on failure.
|
|
*/
|
|
int drm_atomic_commit(struct drm_atomic_state *state)
|
|
{
|
|
struct drm_mode_config *config = &state->dev->mode_config;
|
|
int ret;
|
|
|
|
ret = drm_atomic_check_only(state);
|
|
if (ret)
|
|
return ret;
|
|
|
|
DRM_DEBUG_ATOMIC("committing %p\n", state);
|
|
|
|
return config->funcs->atomic_commit(state->dev, state, false);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_commit);
|
|
|
|
/**
|
|
* drm_atomic_nonblocking_commit - atomic nonblocking commit
|
|
* @state: atomic configuration to check
|
|
*
|
|
* Note that this function can return -EDEADLK if the driver needed to acquire
|
|
* more locks but encountered a deadlock. The caller must then do the usual w/w
|
|
* backoff dance and restart. All other errors are fatal.
|
|
*
|
|
* This function will take its own reference on @state.
|
|
* Callers should always release their reference with drm_atomic_state_put().
|
|
*
|
|
* Returns:
|
|
* 0 on success, negative error code on failure.
|
|
*/
|
|
int drm_atomic_nonblocking_commit(struct drm_atomic_state *state)
|
|
{
|
|
struct drm_mode_config *config = &state->dev->mode_config;
|
|
int ret;
|
|
|
|
ret = drm_atomic_check_only(state);
|
|
if (ret)
|
|
return ret;
|
|
|
|
DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state);
|
|
|
|
return config->funcs->atomic_commit(state->dev, state, true);
|
|
}
|
|
EXPORT_SYMBOL(drm_atomic_nonblocking_commit);
|
|
|
|
/* just used from drm-client and atomic-helper: */
|
|
int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
|
|
struct drm_plane_state *plane_state)
|
|
{
|
|
int ret;
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
drm_atomic_set_fb_for_plane(plane_state, NULL);
|
|
plane_state->crtc_x = 0;
|
|
plane_state->crtc_y = 0;
|
|
plane_state->crtc_w = 0;
|
|
plane_state->crtc_h = 0;
|
|
plane_state->src_x = 0;
|
|
plane_state->src_y = 0;
|
|
plane_state->src_w = 0;
|
|
plane_state->src_h = 0;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_disable_plane);
|
|
|
|
static int update_output_state(struct drm_atomic_state *state,
|
|
struct drm_mode_set *set)
|
|
{
|
|
struct drm_device *dev = set->crtc->dev;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *new_crtc_state;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_state *new_conn_state;
|
|
int ret, i;
|
|
|
|
ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
|
|
state->acquire_ctx);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* First disable all connectors on the target crtc. */
|
|
ret = drm_atomic_add_affected_connectors(state, set->crtc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
for_each_new_connector_in_state(state, connector, new_conn_state, i) {
|
|
if (new_conn_state->crtc == set->crtc) {
|
|
ret = drm_atomic_set_crtc_for_connector(new_conn_state,
|
|
NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Make sure legacy setCrtc always re-trains */
|
|
new_conn_state->link_status = DRM_LINK_STATUS_GOOD;
|
|
}
|
|
}
|
|
|
|
/* Then set all connectors from set->connectors on the target crtc */
|
|
for (i = 0; i < set->num_connectors; i++) {
|
|
new_conn_state = drm_atomic_get_connector_state(state,
|
|
set->connectors[i]);
|
|
if (IS_ERR(new_conn_state))
|
|
return PTR_ERR(new_conn_state);
|
|
|
|
ret = drm_atomic_set_crtc_for_connector(new_conn_state,
|
|
set->crtc);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
|
|
/*
|
|
* Don't update ->enable for the CRTC in the set_config request,
|
|
* since a mismatch would indicate a bug in the upper layers.
|
|
* The actual modeset code later on will catch any
|
|
* inconsistencies here.
|
|
*/
|
|
if (crtc == set->crtc)
|
|
continue;
|
|
|
|
if (!new_crtc_state->connector_mask) {
|
|
ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state,
|
|
NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
new_crtc_state->active = false;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* just used from drm-client and atomic-helper: */
|
|
int __drm_atomic_helper_set_config(struct drm_mode_set *set,
|
|
struct drm_atomic_state *state)
|
|
{
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_plane_state *primary_state;
|
|
struct drm_crtc *crtc = set->crtc;
|
|
int hdisplay, vdisplay;
|
|
int ret;
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
if (IS_ERR(crtc_state))
|
|
return PTR_ERR(crtc_state);
|
|
|
|
primary_state = drm_atomic_get_plane_state(state, crtc->primary);
|
|
if (IS_ERR(primary_state))
|
|
return PTR_ERR(primary_state);
|
|
|
|
if (!set->mode) {
|
|
WARN_ON(set->fb);
|
|
WARN_ON(set->num_connectors);
|
|
|
|
ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
crtc_state->active = false;
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
drm_atomic_set_fb_for_plane(primary_state, NULL);
|
|
|
|
goto commit;
|
|
}
|
|
|
|
WARN_ON(!set->fb);
|
|
WARN_ON(!set->num_connectors);
|
|
|
|
ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
crtc_state->active = true;
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay);
|
|
|
|
drm_atomic_set_fb_for_plane(primary_state, set->fb);
|
|
primary_state->crtc_x = 0;
|
|
primary_state->crtc_y = 0;
|
|
primary_state->crtc_w = hdisplay;
|
|
primary_state->crtc_h = vdisplay;
|
|
primary_state->src_x = set->x << 16;
|
|
primary_state->src_y = set->y << 16;
|
|
if (drm_rotation_90_or_270(primary_state->rotation)) {
|
|
primary_state->src_w = vdisplay << 16;
|
|
primary_state->src_h = hdisplay << 16;
|
|
} else {
|
|
primary_state->src_w = hdisplay << 16;
|
|
primary_state->src_h = vdisplay << 16;
|
|
}
|
|
|
|
commit:
|
|
ret = update_output_state(state, set);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(__drm_atomic_helper_set_config);
|
|
|
|
void drm_atomic_print_state(const struct drm_atomic_state *state)
|
|
{
|
|
struct drm_printer p = drm_info_printer(state->dev->dev);
|
|
struct drm_plane *plane;
|
|
struct drm_plane_state *plane_state;
|
|
struct drm_crtc *crtc;
|
|
struct drm_crtc_state *crtc_state;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_state *connector_state;
|
|
int i;
|
|
|
|
DRM_DEBUG_ATOMIC("checking %p\n", state);
|
|
|
|
for_each_new_plane_in_state(state, plane, plane_state, i)
|
|
drm_atomic_plane_print_state(&p, plane_state);
|
|
|
|
for_each_new_crtc_in_state(state, crtc, crtc_state, i)
|
|
drm_atomic_crtc_print_state(&p, crtc_state);
|
|
|
|
for_each_new_connector_in_state(state, connector, connector_state, i)
|
|
drm_atomic_connector_print_state(&p, connector_state);
|
|
}
|
|
|
|
static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p,
|
|
bool take_locks)
|
|
{
|
|
struct drm_mode_config *config = &dev->mode_config;
|
|
struct drm_plane *plane;
|
|
struct drm_crtc *crtc;
|
|
struct drm_connector *connector;
|
|
struct drm_connector_list_iter conn_iter;
|
|
|
|
if (!drm_drv_uses_atomic_modeset(dev))
|
|
return;
|
|
|
|
list_for_each_entry(plane, &config->plane_list, head) {
|
|
if (take_locks)
|
|
drm_modeset_lock(&plane->mutex, NULL);
|
|
drm_atomic_plane_print_state(p, plane->state);
|
|
if (take_locks)
|
|
drm_modeset_unlock(&plane->mutex);
|
|
}
|
|
|
|
list_for_each_entry(crtc, &config->crtc_list, head) {
|
|
if (take_locks)
|
|
drm_modeset_lock(&crtc->mutex, NULL);
|
|
drm_atomic_crtc_print_state(p, crtc->state);
|
|
if (take_locks)
|
|
drm_modeset_unlock(&crtc->mutex);
|
|
}
|
|
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
|
if (take_locks)
|
|
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
|
|
drm_for_each_connector_iter(connector, &conn_iter)
|
|
drm_atomic_connector_print_state(p, connector->state);
|
|
if (take_locks)
|
|
drm_modeset_unlock(&dev->mode_config.connection_mutex);
|
|
drm_connector_list_iter_end(&conn_iter);
|
|
}
|
|
|
|
/**
|
|
* drm_state_dump - dump entire device atomic state
|
|
* @dev: the drm device
|
|
* @p: where to print the state to
|
|
*
|
|
* Just for debugging. Drivers might want an option to dump state
|
|
* to dmesg in case of error irq's. (Hint, you probably want to
|
|
* ratelimit this!)
|
|
*
|
|
* The caller must drm_modeset_lock_all(), or if this is called
|
|
* from error irq handler, it should not be enabled by default.
|
|
* (Ie. if you are debugging errors you might not care that this
|
|
* is racey. But calling this without all modeset locks held is
|
|
* not inherently safe.)
|
|
*/
|
|
void drm_state_dump(struct drm_device *dev, struct drm_printer *p)
|
|
{
|
|
__drm_state_dump(dev, p, false);
|
|
}
|
|
EXPORT_SYMBOL(drm_state_dump);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
static int drm_state_info(struct seq_file *m, void *data)
|
|
{
|
|
struct drm_info_node *node = (struct drm_info_node *) m->private;
|
|
struct drm_device *dev = node->minor->dev;
|
|
struct drm_printer p = drm_seq_file_printer(m);
|
|
|
|
__drm_state_dump(dev, &p, true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* any use in debugfs files to dump individual planes/crtc/etc? */
|
|
static const struct drm_info_list drm_atomic_debugfs_list[] = {
|
|
{"state", drm_state_info, 0},
|
|
};
|
|
|
|
int drm_atomic_debugfs_init(struct drm_minor *minor)
|
|
{
|
|
return drm_debugfs_create_files(drm_atomic_debugfs_list,
|
|
ARRAY_SIZE(drm_atomic_debugfs_list),
|
|
minor->debugfs_root, minor);
|
|
}
|
|
#endif
|