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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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* Copyright (C) 2014 Red Hat * Copyright (C) 2014 Intel Corp. * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: * Rob Clark <robdclark@gmail.com> * Daniel Vetter <daniel.vetter@ffwll.ch> */
#include <linux/export.h>#include <linux/sync_file.h>
#include <drm/drm_atomic.h>#include <drm/drm_atomic_uapi.h>#include <drm/drm_blend.h>#include <drm/drm_bridge.h>#include <drm/drm_debugfs.h>#include <drm/drm_device.h>#include <drm/drm_drv.h>#include <drm/drm_file.h>#include <drm/drm_fourcc.h>#include <drm/drm_framebuffer.h>#include <drm/drm_mode.h>#include <drm/drm_print.h>#include <drm/drm_writeback.h>#include <drm/drm_colorop.h>
#include "drm_crtc_internal.h"#include "drm_internal.h"
void __drm_crtc_commit_free(struct kref *kref){ struct drm_crtc_commit *commit = container_of(kref, struct drm_crtc_commit, ref);
kfree(commit);}EXPORT_SYMBOL(__drm_crtc_commit_free);
/** * drm_crtc_commit_wait - Waits for a commit to complete * @commit: &drm_crtc_commit to wait for * * Waits for a given &drm_crtc_commit to be programmed into the * hardware and flipped to. * * Returns: * 0 on success, a negative error code otherwise. */int drm_crtc_commit_wait(struct drm_crtc_commit *commit){ unsigned long timeout = 10 * HZ; int ret;
if (!commit) return 0;
ret = wait_for_completion_timeout(&commit->hw_done, timeout); if (!ret) { drm_err(commit->crtc->dev, "hw_done timed out\n"); return -ETIMEDOUT; }
/* * Currently no support for overwriting flips, hence * stall for previous one to execute completely. */ ret = wait_for_completion_timeout(&commit->flip_done, timeout); if (!ret) { drm_err(commit->crtc->dev, "flip_done timed out\n"); return -ETIMEDOUT; }
return 0;}EXPORT_SYMBOL(drm_crtc_commit_wait);
/** * drm_atomic_commit_default_release - * release memory initialized by drm_atomic_commit_init * @state: atomic state * * Free all the memory allocated by drm_atomic_commit_init. * This should only be used by drivers which are still subclassing * &drm_atomic_commit and haven't switched to &drm_private_state yet. */void drm_atomic_commit_default_release(struct drm_atomic_commit *state){ kfree(state->connectors); kfree(state->crtcs); kfree(state->planes); kfree(state->colorops); kfree(state->private_objs);}EXPORT_SYMBOL(drm_atomic_commit_default_release);
/** * drm_atomic_commit_init - init new atomic state * @dev: DRM device * @state: atomic state * * Default implementation for filling in a new atomic state. * This should only be used by drivers which are still subclassing * &drm_atomic_commit and haven't switched to &drm_private_state yet. */intdrm_atomic_commit_init(struct drm_device *dev, struct drm_atomic_commit *state){ kref_init(&state->ref);
/* TODO legacy paths should maybe do a better job about * setting this appropriately? */ state->allow_modeset = true;
state->crtcs = kzalloc_objs(*state->crtcs, dev->mode_config.num_crtc); if (!state->crtcs) goto fail; state->planes = kzalloc_objs(*state->planes, dev->mode_config.num_total_plane); if (!state->planes) goto fail; state->colorops = kzalloc_objs(*state->colorops, dev->mode_config.num_colorop); if (!state->colorops) goto fail;
/* * Because drm_atomic_commit can be committed asynchronously we need our * own reference and cannot rely on the on implied by drm_file in the * ioctl call. */ drm_dev_get(dev); state->dev = dev;
drm_dbg_atomic(dev, "Allocated atomic state %p\n", state);
return 0;fail: drm_atomic_commit_default_release(state); return -ENOMEM;}EXPORT_SYMBOL(drm_atomic_commit_init);
/** * drm_atomic_commit_alloc - allocate atomic state * @dev: DRM device * * This allocates an empty atomic state to track updates. */struct drm_atomic_commit *drm_atomic_commit_alloc(struct drm_device *dev){ struct drm_mode_config *config = &dev->mode_config;
if (!config->funcs->atomic_state_alloc) { struct drm_atomic_commit *state;
state = kzalloc_obj(*state); if (!state) return NULL; if (drm_atomic_commit_init(dev, state) < 0) { kfree(state); return NULL; } return state; }
return config->funcs->atomic_state_alloc(dev);}EXPORT_SYMBOL(drm_atomic_commit_alloc);
/** * drm_atomic_commit_default_clear - clear base atomic state * @state: atomic state * * Default implementation for clearing atomic state. * This should only be used by drivers which are still subclassing * &drm_atomic_commit and haven't switched to &drm_private_state yet. */void drm_atomic_commit_default_clear(struct drm_atomic_commit *state){ struct drm_device *dev = state->dev; struct drm_mode_config *config = &dev->mode_config; int i;
drm_dbg_atomic(dev, "Clearing atomic state %p\n", state);
state->checked = false;
for (i = 0; i < state->num_connector; i++) { struct drm_connector *connector = state->connectors[i].ptr;
if (!connector) continue;
connector->funcs->atomic_destroy_state(connector, state->connectors[i].state_to_destroy); state->connectors[i].ptr = NULL; state->connectors[i].state_to_destroy = NULL; state->connectors[i].old_state = NULL; state->connectors[i].new_state = NULL; drm_connector_put(connector); }
for (i = 0; i < config->num_crtc; i++) { struct drm_crtc *crtc = state->crtcs[i].ptr;
if (!crtc) continue;
crtc->funcs->atomic_destroy_state(crtc, state->crtcs[i].state_to_destroy);
state->crtcs[i].ptr = NULL; state->crtcs[i].state_to_destroy = NULL; state->crtcs[i].old_state = NULL; state->crtcs[i].new_state = NULL;
if (state->crtcs[i].commit) { drm_crtc_commit_put(state->crtcs[i].commit); state->crtcs[i].commit = NULL; } }
for (i = 0; i < config->num_total_plane; i++) { struct drm_plane *plane = state->planes[i].ptr;
if (!plane) continue;
plane->funcs->atomic_destroy_state(plane, state->planes[i].state_to_destroy); state->planes[i].ptr = NULL; state->planes[i].state_to_destroy = NULL; state->planes[i].old_state = NULL; state->planes[i].new_state = NULL; }
for (i = 0; i < config->num_colorop; i++) { struct drm_colorop *colorop = state->colorops[i].ptr;
if (!colorop) continue;
drm_colorop_atomic_destroy_state(colorop, state->colorops[i].state); state->colorops[i].ptr = NULL; state->colorops[i].state = NULL; state->colorops[i].old_state = NULL; state->colorops[i].new_state = NULL; }
for (i = 0; i < state->num_private_objs; i++) { struct drm_private_obj *obj = state->private_objs[i].ptr;
obj->funcs->atomic_destroy_state(obj, state->private_objs[i].state_to_destroy); state->private_objs[i].ptr = NULL; state->private_objs[i].state_to_destroy = NULL; state->private_objs[i].old_state = NULL; state->private_objs[i].new_state = NULL; } state->num_private_objs = 0;
if (state->fake_commit) { drm_crtc_commit_put(state->fake_commit); state->fake_commit = NULL; }}EXPORT_SYMBOL(drm_atomic_commit_default_clear);
/** * drm_atomic_commit_clear - clear state object * @state: atomic state * * When the w/w mutex algorithm detects a deadlock we need to back off and drop * all locks. So someone else could sneak in and change the current modeset * configuration. Which means that all the state assembled in @state is no * longer an atomic update to the current state, but to some arbitrary earlier * state. Which could break assumptions the driver's * &drm_mode_config_funcs.atomic_check likely relies on. * * Hence we must clear all cached state and completely start over, using this * function. */void drm_atomic_commit_clear(struct drm_atomic_commit *state){ struct drm_device *dev = state->dev; struct drm_mode_config *config = &dev->mode_config;
if (config->funcs->atomic_state_clear) config->funcs->atomic_state_clear(state); else drm_atomic_commit_default_clear(state);}EXPORT_SYMBOL(drm_atomic_commit_clear);
/** * __drm_atomic_commit_free - free all memory for an atomic state * @ref: This atomic state to deallocate * * This frees all memory associated with an atomic state, including all the * per-object state for planes, CRTCs and connectors. */void __drm_atomic_commit_free(struct kref *ref){ struct drm_atomic_commit *state = container_of(ref, typeof(*state), ref); struct drm_device *dev = state->dev; struct drm_mode_config *config = &dev->mode_config;
drm_atomic_commit_clear(state);
drm_dbg_atomic(state->dev, "Freeing atomic state %p\n", state);
if (config->funcs->atomic_state_free) { config->funcs->atomic_state_free(state); } else { drm_atomic_commit_default_release(state); kfree(state); }
drm_dev_put(dev);}EXPORT_SYMBOL(__drm_atomic_commit_free);
/** * drm_atomic_get_crtc_state - get CRTC state * @state: global atomic state object * @crtc: CRTC to get state object for * * This function returns the CRTC state for the given CRTC, allocating it if * needed. It will also grab the relevant CRTC lock to make sure that the state * is consistent. * * WARNING: Drivers may only add new CRTC states to a @state if * drm_atomic_commit.allow_modeset is set, or if it's a driver-internal commit * not created by userspace through an IOCTL call. * * 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_crtc_state *drm_atomic_get_crtc_state(struct drm_atomic_commit *state, struct drm_crtc *crtc){ int ret, index = drm_crtc_index(crtc); struct drm_crtc_state *crtc_state;
WARN_ON(!state->acquire_ctx); drm_WARN_ON(state->dev, state->checked);
crtc_state = drm_atomic_get_new_crtc_state(state, crtc); if (crtc_state) return crtc_state;
ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); if (ret) return ERR_PTR(ret);
crtc_state = crtc->funcs->atomic_duplicate_state(crtc); if (!crtc_state) return ERR_PTR(-ENOMEM);
state->crtcs[index].state_to_destroy = crtc_state; state->crtcs[index].old_state = crtc->state; state->crtcs[index].new_state = crtc_state; state->crtcs[index].ptr = crtc; crtc_state->state = state;
drm_dbg_atomic(state->dev, "Added [CRTC:%d:%s] %p state to %p\n", crtc->base.id, crtc->name, crtc_state, state);
return crtc_state;}EXPORT_SYMBOL(drm_atomic_get_crtc_state);
static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state, const struct drm_crtc_state *new_crtc_state){ struct drm_crtc *crtc = new_crtc_state->crtc;
/* NOTE: we explicitly don't enforce constraints such as primary * layer covering entire screen, since that is something we want * to allow (on hw that supports it). For hw that does not, it * should be checked in driver's crtc->atomic_check() vfunc. * * TODO: Add generic modeset state checks once we support those. */
if (new_crtc_state->active && !new_crtc_state->enable) { drm_dbg_atomic(crtc->dev, "[CRTC:%d:%s] active without enabled\n", crtc->base.id, crtc->name); return -EINVAL; }
/* The state->enable vs. state->mode_blob checks can be WARN_ON, * as this is a kernel-internal detail that userspace should never * be able to trigger. */ if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) { drm_dbg_atomic(crtc->dev, "[CRTC:%d:%s] enabled without mode blob\n", crtc->base.id, crtc->name); return -EINVAL; }
if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) { drm_dbg_atomic(crtc->dev, "[CRTC:%d:%s] disabled with mode blob\n", crtc->base.id, crtc->name); return -EINVAL; }
/* * Reject event generation for when a CRTC is off and stays off. * It wouldn't be hard to implement this, but userspace has a track * record of happily burning through 100% cpu (or worse, crash) when the * display pipe is suspended. To avoid all that fun just reject updates * that ask for events since likely that indicates a bug in the * compositor's drawing loop. This is consistent with the vblank IOCTL * and legacy page_flip IOCTL which also reject service on a disabled * pipe. */ if (new_crtc_state->event && !new_crtc_state->active && !old_crtc_state->active) { drm_dbg_atomic(crtc->dev, "[CRTC:%d:%s] requesting event but off\n", crtc->base.id, crtc->name); return -EINVAL; }
return 0;}
static void drm_atomic_crtc_print_state(struct drm_printer *p, const struct drm_crtc_state *state){ struct drm_crtc *crtc = state->crtc;
drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name); drm_printf_indent(p, 1, "enable=%d\n", state->enable); drm_printf_indent(p, 1, "active=%d\n", state->active); drm_printf_indent(p, 1, "self_refresh_active=%d\n", state->self_refresh_active); drm_printf_indent(p, 1, "planes_changed=%d\n", state->planes_changed); drm_printf_indent(p, 1, "mode_changed=%d\n", state->mode_changed); drm_printf_indent(p, 1, "active_changed=%d\n", state->active_changed); drm_printf_indent(p, 1, "connectors_changed=%d\n", state->connectors_changed); drm_printf_indent(p, 1, "color_mgmt_changed=%d\n", state->color_mgmt_changed); drm_printf_indent(p, 1, "plane_mask=%x\n", state->plane_mask); drm_printf_indent(p, 1, "connector_mask=%x\n", state->connector_mask); drm_printf_indent(p, 1, "encoder_mask=%x\n", state->encoder_mask); drm_printf_indent(p, 1, "mode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode)); drm_printf_indent(p, 1, "background_color=%llx\n", state->background_color);
if (crtc->funcs->atomic_print_state) crtc->funcs->atomic_print_state(p, state);}
static int drm_atomic_connector_check(struct drm_connector *connector, struct drm_connector_state *state){ struct drm_crtc_state *crtc_state; struct drm_writeback_job *writeback_job = state->writeback_job; const struct drm_display_info *info = &connector->display_info;
state->max_bpc = info->bpc ? info->bpc : 8; if (connector->max_bpc_property) state->max_bpc = min(state->max_bpc, state->max_requested_bpc);
if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job) return 0;
if (writeback_job->fb && !state->crtc) { drm_dbg_atomic(connector->dev, "[CONNECTOR:%d:%s] framebuffer without CRTC\n", connector->base.id, connector->name); return -EINVAL; }
if (state->crtc) crtc_state = drm_atomic_get_new_crtc_state(state->state, state->crtc);
if (writeback_job->fb && !crtc_state->active) { drm_dbg_atomic(connector->dev, "[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n", connector->base.id, connector->name, state->crtc->base.id); return -EINVAL; }
if (!writeback_job->fb) { if (writeback_job->out_fence) { drm_dbg_atomic(connector->dev, "[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n", connector->base.id, connector->name); return -EINVAL; }
drm_writeback_cleanup_job(writeback_job); state->writeback_job = NULL; }
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_commit *state, struct drm_plane *plane){ int ret, index = drm_plane_index(plane); struct drm_plane_state *plane_state;
WARN_ON(!state->acquire_ctx); drm_WARN_ON(state->dev, state->checked);
/* 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_new_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_to_destroy = 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_dbg_atomic(plane->dev, "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);
/** * drm_atomic_get_colorop_state - get colorop state * @state: global atomic state object * @colorop: colorop to get state object for * * This function returns the colorop state for the given colorop, 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_colorop_state *drm_atomic_get_colorop_state(struct drm_atomic_commit *state, struct drm_colorop *colorop){ int ret, index = drm_colorop_index(colorop); struct drm_colorop_state *colorop_state;
WARN_ON(!state->acquire_ctx);
colorop_state = drm_atomic_get_new_colorop_state(state, colorop); if (colorop_state) return colorop_state;
ret = drm_modeset_lock(&colorop->plane->mutex, state->acquire_ctx); if (ret) return ERR_PTR(ret);
colorop_state = drm_atomic_helper_colorop_duplicate_state(colorop); if (!colorop_state) return ERR_PTR(-ENOMEM);
state->colorops[index].state = colorop_state; state->colorops[index].ptr = colorop; state->colorops[index].old_state = colorop->state; state->colorops[index].new_state = colorop_state; colorop_state->state = state;
drm_dbg_atomic(colorop->dev, "Added [COLOROP:%d:%d] %p state to %p\n", colorop->base.id, colorop->type, colorop_state, state);
return colorop_state;}EXPORT_SYMBOL(drm_atomic_get_colorop_state);
/** * drm_atomic_get_old_colorop_state - get colorop state, if it exists * @state: global atomic state object * @colorop: colorop to grab * * This function returns the old colorop state for the given colorop, or * NULL if the colorop is not part of the global atomic state. */struct drm_colorop_state *drm_atomic_get_old_colorop_state(struct drm_atomic_commit *state, struct drm_colorop *colorop){ return state->colorops[drm_colorop_index(colorop)].old_state;}EXPORT_SYMBOL(drm_atomic_get_old_colorop_state);
/** * drm_atomic_get_new_colorop_state - get colorop state, if it exists * @state: global atomic state object * @colorop: colorop to grab * * This function returns the new colorop state for the given colorop, or * NULL if the colorop is not part of the global atomic state. */struct drm_colorop_state *drm_atomic_get_new_colorop_state(struct drm_atomic_commit *state, struct drm_colorop *colorop){ return state->colorops[drm_colorop_index(colorop)].new_state;}EXPORT_SYMBOL(drm_atomic_get_new_colorop_state);
static boolplane_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;
/* either *both* CRTC and FB must be set, or neither */ if (crtc && !fb) { drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n", plane->base.id, plane->name); return -EINVAL; } else if (fb && !crtc) { drm_dbg_atomic(plane->dev, "[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_dbg_atomic(plane->dev, "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. */ if (!drm_plane_has_format(plane, fb->format->format, fb->modifier)) { drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n", plane->base.id, plane->name, &fb->format->format, fb->modifier); return -EINVAL; }
/* 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_dbg_atomic(plane->dev, "[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_dbg_atomic(plane->dev, "[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_dbg_atomic(plane->dev, "[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_dbg_atomic(plane->dev, "[PLANE:%d:%s] switching CRTC directly\n", plane->base.id, plane->name); return -EINVAL; }
return 0;}
static void drm_atomic_colorop_print_state(struct drm_printer *p, const struct drm_colorop_state *state){ struct drm_colorop *colorop = state->colorop;
drm_printf(p, "colorop[%u]:\n", colorop->base.id); drm_printf_indent(p, 1, "type=%s\n", drm_get_colorop_type_name(colorop->type)); if (colorop->bypass_property) drm_printf_indent(p, 1, "bypass=%u\n", state->bypass);
switch (colorop->type) { case DRM_COLOROP_1D_CURVE: drm_printf_indent(p, 1, "curve_1d_type=%s\n", drm_get_colorop_curve_1d_type_name(state->curve_1d_type)); break; case DRM_COLOROP_1D_LUT: drm_printf_indent(p, 1, "size=%d\n", colorop->size); drm_printf_indent(p, 1, "interpolation=%s\n", drm_get_colorop_lut1d_interpolation_name(state->lut1d_interpolation)); drm_printf_indent(p, 1, "data blob id=%d\n", state->data ? state->data->base.id : 0); break; case DRM_COLOROP_CTM_3X4: drm_printf_indent(p, 1, "data blob id=%d\n", state->data ? state->data->base.id : 0); break; case DRM_COLOROP_MULTIPLIER: drm_printf_indent(p, 1, "multiplier=%llu\n", state->multiplier); break; case DRM_COLOROP_3D_LUT: drm_printf_indent(p, 1, "size=%d\n", colorop->size); drm_printf_indent(p, 1, "interpolation=%s\n", drm_get_colorop_lut3d_interpolation_name(state->lut3d_interpolation)); drm_printf_indent(p, 1, "data blob id=%d\n", state->data ? state->data->base.id : 0); break; default: break; }
drm_printf_indent(p, 1, "next=%d\n", colorop->next ? colorop->next->base.id : 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_indent(p, 1, "crtc=%s\n", state->crtc ? state->crtc->name : "(null)"); drm_printf_indent(p, 1, "fb=%u\n", state->fb ? state->fb->base.id : 0); if (state->fb) drm_framebuffer_print_info(p, 2, state->fb); drm_printf_indent(p, 1, "crtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest)); drm_printf_indent(p, 1, "src-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src)); drm_printf_indent(p, 1, "rotation=%x\n", state->rotation); drm_printf_indent(p, 1, "normalized-zpos=%x\n", state->normalized_zpos); drm_printf_indent(p, 1, "color-encoding=%s\n", drm_get_color_encoding_name(state->color_encoding)); drm_printf_indent(p, 1, "color-range=%s\n", drm_get_color_range_name(state->color_range)); drm_printf_indent(p, 1, "color_mgmt_changed=%d\n", state->color_mgmt_changed); drm_printf_indent(p, 1, "color-pipeline=%d\n", state->color_pipeline ? state->color_pipeline->base.id : 0); 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 userspace) 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_commit.fake_commit. * * All private state structures contained in a &drm_atomic_commit 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_commit. 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 * @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. * * RETURNS: * Zero on success, error code on failure */int drm_atomic_private_obj_init(struct drm_device *dev, struct drm_private_obj *obj, const struct drm_private_state_funcs *funcs){ struct drm_private_state *state; memset(obj, 0, sizeof(*obj));
drm_modeset_lock_init(&obj->lock);
obj->dev = dev; obj->funcs = funcs; list_add_tail(&obj->head, &dev->mode_config.privobj_list);
state = obj->funcs->atomic_create_state(obj); if (IS_ERR(state)) return PTR_ERR(state);
obj->state = state;
return 0;}EXPORT_SYMBOL(drm_atomic_private_obj_init);
/** * drm_atomic_private_obj_fini - finalize private object * @obj: private object * * Finalize the private object. */voiddrm_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_commit *state, struct drm_private_obj *obj){ int index, num_objs, ret; size_t size; struct __drm_private_objs_state *arr; struct drm_private_state *obj_state;
WARN_ON(!state->acquire_ctx); drm_WARN_ON(state->dev, state->checked);
obj_state = drm_atomic_get_new_private_obj_state(state, obj); if (obj_state) return obj_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_to_destroy = 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_dbg_atomic(state->dev, "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(const struct drm_atomic_commit *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(const struct drm_atomic_commit *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. * * If you don't have access to the atomic state, see * drm_atomic_get_connector_for_encoder(). * * 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(const struct drm_atomic_commit *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. * * If you don't have access to the atomic state, see * drm_atomic_get_connector_for_encoder(). * * 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(const struct drm_atomic_commit *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_for_encoder - Get connector currently assigned to an encoder * @encoder: The encoder to find the connector of * @ctx: Modeset locking context * * This function finds and returns the connector currently assigned to * an @encoder. * * It is similar to the drm_atomic_get_old_connector_for_encoder() and * drm_atomic_get_new_connector_for_encoder() helpers, but doesn't * require access to the atomic state. If you have access to it, prefer * using these. This helper is typically useful in situations where you * don't have access to the atomic state, like detect, link repair, * threaded interrupt handlers, or hooks from other frameworks (ALSA, * CEC, etc.). * * Returns: * The connector connected to @encoder, or an error pointer otherwise. * When the error is EDEADLK, a deadlock has been detected and the * sequence must be restarted. */struct drm_connector *drm_atomic_get_connector_for_encoder(const struct drm_encoder *encoder, struct drm_modeset_acquire_ctx *ctx){ struct drm_connector_list_iter conn_iter; struct drm_connector *out_connector = ERR_PTR(-EINVAL); struct drm_connector *connector; struct drm_device *dev = encoder->dev; int ret;
ret = drm_modeset_lock(&dev->mode_config.connection_mutex, ctx); if (ret) return ERR_PTR(ret);
drm_connector_list_iter_begin(dev, &conn_iter); drm_for_each_connector_iter(connector, &conn_iter) { if (!connector->state) continue;
if (encoder == connector->state->best_encoder) { out_connector = connector; break; } } drm_connector_list_iter_end(&conn_iter); drm_modeset_unlock(&dev->mode_config.connection_mutex);
return out_connector;}EXPORT_SYMBOL(drm_atomic_get_connector_for_encoder);
/** * drm_atomic_get_old_crtc_for_encoder - Get old crtc for an encoder * @state: Atomic state * @encoder: The encoder to fetch the crtc state for * * This function finds and returns the crtc that was connected to @encoder * as specified by the @state. * * Returns: The old crtc connected to @encoder, or NULL if the encoder is * not connected. */struct drm_crtc *drm_atomic_get_old_crtc_for_encoder(struct drm_atomic_commit *state, struct drm_encoder *encoder){ struct drm_connector *connector; struct drm_connector_state *conn_state;
connector = drm_atomic_get_old_connector_for_encoder(state, encoder); if (!connector) return NULL;
conn_state = drm_atomic_get_old_connector_state(state, connector); if (!conn_state) return NULL;
return conn_state->crtc;}EXPORT_SYMBOL(drm_atomic_get_old_crtc_for_encoder);
/** * drm_atomic_get_new_crtc_for_encoder - Get new crtc for an encoder * @state: Atomic state * @encoder: The encoder to fetch the crtc state for * * This function finds and returns the crtc that will be connected to @encoder * as specified by the @state. * * Returns: The new crtc connected to @encoder, or NULL if the encoder is * not connected. */struct drm_crtc *drm_atomic_get_new_crtc_for_encoder(struct drm_atomic_commit *state, struct drm_encoder *encoder){ struct drm_connector *connector; struct drm_connector_state *conn_state;
connector = drm_atomic_get_new_connector_for_encoder(state, encoder); if (!connector) return NULL;
conn_state = drm_atomic_get_new_connector_state(state, connector); if (!conn_state) return NULL;
return conn_state->crtc;}EXPORT_SYMBOL(drm_atomic_get_new_crtc_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_commit *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); drm_WARN_ON(state->dev, state->checked);
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_array(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; }
connector_state = drm_atomic_get_new_connector_state(state, connector); if (connector_state) return connector_state;
connector_state = connector->funcs->atomic_duplicate_state(connector); if (!connector_state) return ERR_PTR(-ENOMEM);
drm_connector_get(connector); state->connectors[index].state_to_destroy = 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_dbg_atomic(connector->dev, "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_indent(p, 1, "crtc=%s\n", state->crtc ? state->crtc->name : "(null)"); drm_printf_indent(p, 1, "self_refresh_aware=%d\n", state->self_refresh_aware); drm_printf_indent(p, 1, "interlace_allowed=%d\n", connector->interlace_allowed); drm_printf_indent(p, 1, "ycbcr_420_allowed=%d\n", connector->ycbcr_420_allowed); drm_printf_indent(p, 1, "max_requested_bpc=%d\n", state->max_requested_bpc); drm_printf_indent(p, 1, "colorspace=%s\n", drm_get_colorspace_name(state->colorspace));
if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA || connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) { drm_printf_indent(p, 1, "broadcast_rgb=%s\n", drm_hdmi_connector_get_broadcast_rgb_name(state->hdmi.broadcast_rgb)); drm_printf_indent(p, 1, "is_limited_range=%c\n", state->hdmi.is_limited_range ? 'y' : 'n'); drm_printf_indent(p, 1, "output_bpc=%u\n", state->hdmi.output_bpc); drm_printf_indent(p, 1, "output_format=%s\n", drm_hdmi_connector_get_output_format_name(state->hdmi.output_format)); drm_printf_indent(p, 1, "tmds_char_rate=%llu\n", state->hdmi.tmds_char_rate); }
if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) if (state->writeback_job && state->writeback_job->fb) drm_printf_indent(p, 1, "fb=%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_commit *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(const struct drm_atomic_commit *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(const struct drm_atomic_commit *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 * &drm_bridge_funcs.atomic_check(), &drm_bridge_funcs.atomic_pre_enable(), * &drm_bridge_funcs.atomic_enable(), * &drm_bridge_funcs.atomic_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. */intdrm_atomic_add_encoder_bridges(struct drm_atomic_commit *state, struct drm_encoder *encoder){ struct drm_bridge_state *bridge_state;
if (!encoder) return 0;
drm_dbg_atomic(encoder->dev, "Adding all bridges for [encoder:%d:%s] to %p\n", encoder->base.id, encoder->name, state);
drm_for_each_bridge_in_chain_scoped(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 serialization 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. */intdrm_atomic_add_affected_connectors(struct drm_atomic_commit *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_dbg_atomic(crtc->dev, "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 parallelism 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. */intdrm_atomic_add_affected_planes(struct drm_atomic_commit *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; int ret;
WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc));
drm_dbg_atomic(crtc->dev, "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);
if (plane_state->color_pipeline) { ret = drm_atomic_add_affected_colorops(state, plane); if (ret) return ret; } } return 0;}EXPORT_SYMBOL(drm_atomic_add_affected_planes);
/** * drm_atomic_add_affected_colorops - add colorops for plane * @state: atomic state * @plane: DRM plane * * This function walks the current configuration and adds all colorops * currently used by @plane to the atomic configuration @state. This is useful * when an atomic commit also needs to check all currently enabled colorop on * @plane, e.g. when changing the mode. It's also useful when re-enabling a plane * to avoid special code to force-enable all colorops. * * Since acquiring a colorop state will always also acquire the w/w mutex of the * current plane for that colorop (if there is any) adding all the colorop states for * a plane will not reduce parallelism 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. */intdrm_atomic_add_affected_colorops(struct drm_atomic_commit *state, struct drm_plane *plane){ struct drm_colorop *colorop; struct drm_colorop_state *colorop_state;
WARN_ON(!drm_atomic_get_new_plane_state(state, plane));
drm_dbg_atomic(plane->dev, "Adding all current colorops for [PLANE:%d:%s] to %p\n", plane->base.id, plane->name, state);
drm_for_each_colorop(colorop, plane->dev) { if (colorop->plane != plane) continue;
colorop_state = drm_atomic_get_colorop_state(state, colorop); if (IS_ERR(colorop_state)) return PTR_ERR(colorop_state); }
return 0;}EXPORT_SYMBOL(drm_atomic_add_affected_colorops);
/** * 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_commit *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; unsigned int requested_crtc = 0; unsigned int affected_crtc = 0; int i, ret = 0;
drm_dbg_atomic(dev, "checking %p\n", state);
for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { if (new_crtc_state->enable) requested_crtc |= drm_crtc_mask(crtc); }
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_dbg_atomic(dev, "[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_dbg_atomic(dev, "[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_dbg_atomic(dev, "[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_dbg_atomic(dev, "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_dbg_atomic(dev, "[CRTC:%d:%s] requires full modeset\n", crtc->base.id, crtc->name); return -EINVAL; } } }
for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { if (new_crtc_state->enable) affected_crtc |= drm_crtc_mask(crtc); }
/* * For commits that allow modesets drivers can add other CRTCs to the * atomic commit, e.g. when they need to reallocate global resources. * This can cause spurious EBUSY, which robs compositors of a very * effective sanity check for their drawing loop. Therefor only allow * drivers to add unrelated CRTC states for modeset commits. * * FIXME: Should add affected_crtc mask to the ATOMIC IOCTL as an output * so compositors know what's going on. */ if (affected_crtc != requested_crtc) { drm_dbg_atomic(dev, "driver added CRTC to commit: requested 0x%x, affected 0x%0x\n", requested_crtc, affected_crtc); WARN(!state->allow_modeset, "adding CRTC not allowed without modesets: requested 0x%x, affected 0x%0x\n", requested_crtc, affected_crtc); }
state->checked = true;
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_commit_put(). * * Returns: * 0 on success, negative error code on failure. */int drm_atomic_commit(struct drm_atomic_commit *state){ struct drm_mode_config *config = &state->dev->mode_config; struct drm_printer p = drm_info_printer(state->dev->dev); int ret;
if (drm_debug_enabled(DRM_UT_STATE)) drm_atomic_print_new_state(state, &p);
ret = drm_atomic_check_only(state); if (ret) return ret;
drm_dbg_atomic(state->dev, "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_commit_put(). * * Returns: * 0 on success, negative error code on failure. */int drm_atomic_nonblocking_commit(struct drm_atomic_commit *state){ struct drm_mode_config *config = &state->dev->mode_config; int ret;
ret = drm_atomic_check_only(state); if (ret) return ret;
drm_dbg_atomic(state->dev, "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_commit *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_commit *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);
static void drm_atomic_private_obj_print_state(struct drm_printer *p, const struct drm_private_state *state){ struct drm_private_obj *obj = state->obj;
if (obj->funcs->atomic_print_state) obj->funcs->atomic_print_state(p, state);}
/** * drm_atomic_print_new_state - prints drm atomic state * @state: atomic configuration to check * @p: drm printer * * This functions prints the drm atomic state snapshot using the drm printer * which is passed to it. This snapshot can be used for debugging purposes. * * Note that this function looks into the new state objects and hence its not * safe to be used after the call to drm_atomic_helper_commit_hw_done(). */void drm_atomic_print_new_state(const struct drm_atomic_commit *state, struct drm_printer *p){ 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; struct drm_private_obj *obj; struct drm_private_state *obj_state; int i;
if (!p) { drm_err(state->dev, "invalid drm printer\n"); return; }
drm_dbg_atomic(state->dev, "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);
for_each_new_private_obj_in_state(state, obj, obj_state, i) drm_atomic_private_obj_print_state(p, obj_state);}EXPORT_SYMBOL(drm_atomic_print_new_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_colorop *colorop; struct drm_plane *plane; struct drm_crtc *crtc; struct drm_connector *connector; struct drm_connector_list_iter conn_iter; struct drm_private_obj *obj;
if (!drm_drv_uses_atomic_modeset(dev)) return;
list_for_each_entry(colorop, &config->colorop_list, head) { if (take_locks) drm_modeset_lock(&colorop->plane->mutex, NULL); drm_atomic_colorop_print_state(p, colorop->state); if (take_locks) drm_modeset_unlock(&colorop->plane->mutex); }
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);
list_for_each_entry(obj, &config->privobj_list, head) { if (take_locks) drm_modeset_lock(&obj->lock, NULL); drm_atomic_private_obj_print_state(p, obj->state); if (take_locks) drm_modeset_unlock(&obj->lock); }}
/** * 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 wrap this drm_modeset_lock_all_ctx() and * drm_modeset_drop_locks(). If this is called from error irq handler, it should * not be enabled by default - if you are debugging errors you might * not care that this is racey, but calling this without all modeset locks held * is inherently unsafe. */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_FSstatic int drm_state_info(struct seq_file *m, void *data){ struct drm_debugfs_entry *entry = m->private; struct drm_device *dev = entry->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_debugfs_info drm_atomic_debugfs_list[] = { {"state", drm_state_info, 0},};
void drm_atomic_debugfs_init(struct drm_device *dev){ drm_debugfs_add_files(dev, drm_atomic_debugfs_list, ARRAY_SIZE(drm_atomic_debugfs_list));}#endif