Simon Ser
2 years ago
parent
b4e9487312
commit
9d43e7e4d6
@ -0,0 +1,347 @@
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#define _POSIX_C_SOURCE 200809L
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#include <fcntl.h>
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#include <libliftoff.h>
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#include <unistd.h>
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#include <wlr/util/log.h>
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#include "backend/drm/drm.h"
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#include "backend/drm/iface.h"
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static bool init(struct wlr_drm_backend *drm) {
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// TODO: lower log level
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liftoff_log_set_priority(LIFTOFF_DEBUG);
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int drm_fd = fcntl(drm->fd, F_DUPFD_CLOEXEC, 0);
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if (drm_fd < 0) {
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wlr_log_errno(WLR_ERROR, "fcntl(F_DUPFD_CLOEXEC) failed");
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return false;
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}
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drm->liftoff = liftoff_device_create(drm_fd);
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if (!drm->liftoff) {
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wlr_log(WLR_ERROR, "Failed to create liftoff device");
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close(drm_fd);
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return false;
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}
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for (size_t i = 0; i < drm->num_planes; i++) {
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struct wlr_drm_plane *plane = &drm->planes[i];
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if (plane->initial_crtc_id != 0) {
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continue;
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}
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plane->liftoff = liftoff_plane_create(drm->liftoff, plane->id);
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if (plane->liftoff == NULL) {
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wlr_log(WLR_ERROR, "Failed to create liftoff plane");
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return false;
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}
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}
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for (size_t i = 0; i < drm->num_crtcs; i++) {
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struct wlr_drm_crtc *crtc = &drm->crtcs[i];
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crtc->liftoff = liftoff_output_create(drm->liftoff, crtc->id);
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if (!crtc->liftoff) {
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wlr_log(WLR_ERROR, "Failed to create liftoff output");
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return false;
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}
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if (crtc->primary) {
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crtc->primary->liftoff_layer = liftoff_layer_create(crtc->liftoff);
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if (!crtc->primary->liftoff_layer) {
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wlr_log(WLR_ERROR, "Failed to create liftoff layer for primary plane");
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return false;
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}
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}
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if (crtc->cursor) {
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crtc->cursor->liftoff_layer = liftoff_layer_create(crtc->liftoff);
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if (!crtc->cursor->liftoff_layer) {
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wlr_log(WLR_ERROR, "Failed to create liftoff layer for cursor plane");
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return false;
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}
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}
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}
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return true;
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}
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static bool register_planes_for_crtc(struct wlr_drm_backend *drm,
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struct wlr_drm_crtc *crtc) {
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// When performing the first modeset on a CRTC, we need to be a bit careful
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// when it comes to planes: we don't want to allow libliftoff to make use
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// of planes currently already in-use on another CRTC. We need to wait for
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// a modeset to happen on the other CRTC before being able to use these.
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for (size_t i = 0; i < drm->num_planes; i++) {
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struct wlr_drm_plane *plane = &drm->planes[i];
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if (plane->liftoff != NULL || plane->initial_crtc_id != crtc->id) {
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continue;
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}
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plane->liftoff = liftoff_plane_create(drm->liftoff, plane->id);
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if (plane->liftoff == NULL) {
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wlr_log(WLR_ERROR, "Failed to create liftoff plane");
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return false;
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}
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}
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return true;
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}
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static void finish(struct wlr_drm_backend *drm) {
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for (size_t i = 0; i < drm->num_crtcs; i++) {
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struct wlr_drm_crtc *crtc = &drm->crtcs[i];
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if (crtc->primary) {
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liftoff_layer_destroy(crtc->primary->liftoff_layer);
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}
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if (crtc->cursor) {
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liftoff_layer_destroy(crtc->cursor->liftoff_layer);
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}
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liftoff_output_destroy(crtc->liftoff);
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}
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liftoff_device_destroy(drm->liftoff);
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}
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static bool add_prop(drmModeAtomicReq *req, uint32_t obj,
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uint32_t prop, uint64_t val) {
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if (drmModeAtomicAddProperty(req, obj, prop, val) < 0) {
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wlr_log_errno(WLR_ERROR, "drmModeAtomicAddProperty failed");
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return false;
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}
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return true;
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}
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static void commit_blob(struct wlr_drm_backend *drm,
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uint32_t *current, uint32_t next) {
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if (*current == next) {
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return;
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}
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if (*current != 0) {
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drmModeDestroyPropertyBlob(drm->fd, *current);
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}
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*current = next;
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}
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static void rollback_blob(struct wlr_drm_backend *drm,
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uint32_t *current, uint32_t next) {
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if (*current == next) {
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return;
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}
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if (next != 0) {
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drmModeDestroyPropertyBlob(drm->fd, next);
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}
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}
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static bool set_plane_props(struct wlr_drm_plane *plane,
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int32_t x, int32_t y, uint64_t zpos) {
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struct wlr_drm_fb *fb = plane_get_next_fb(plane);
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if (fb == NULL) {
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wlr_log(WLR_ERROR, "Failed to acquire FB");
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return false;
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}
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uint32_t width = fb->wlr_buf->width;
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uint32_t height = fb->wlr_buf->height;
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// The SRC_* properties are in 16.16 fixed point
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struct liftoff_layer *layer = plane->liftoff_layer;
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return liftoff_layer_set_property(layer, "zpos", zpos) == 0 &&
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liftoff_layer_set_property(layer, "SRC_X", 0) == 0 &&
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liftoff_layer_set_property(layer, "SRC_Y", 0) == 0 &&
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liftoff_layer_set_property(layer, "SRC_W", (uint64_t)width << 16) == 0 &&
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liftoff_layer_set_property(layer, "SRC_H", (uint64_t)height << 16) == 0 &&
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liftoff_layer_set_property(layer, "CRTC_X", (uint64_t)x) == 0 &&
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liftoff_layer_set_property(layer, "CRTC_Y", (uint64_t)y) == 0 &&
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liftoff_layer_set_property(layer, "CRTC_W", width) == 0 &&
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liftoff_layer_set_property(layer, "CRTC_H", height) == 0 &&
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liftoff_layer_set_property(layer, "FB_ID", fb->id) == 0;
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}
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static bool disable_plane(struct wlr_drm_plane *plane) {
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return liftoff_layer_set_property(plane->liftoff_layer, "FB_ID", 0) == 0;
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}
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static bool crtc_commit(struct wlr_drm_connector *conn,
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const struct wlr_drm_connector_state *state, uint32_t flags,
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bool test_only) {
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struct wlr_drm_backend *drm = conn->backend;
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struct wlr_output *output = &conn->output;
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struct wlr_drm_crtc *crtc = conn->crtc;
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bool modeset = state->modeset;
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bool active = state->active;
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if (modeset && !register_planes_for_crtc(drm, crtc)) {
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return false;
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}
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uint32_t mode_id = crtc->mode_id;
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if (modeset) {
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if (!create_mode_blob(drm, conn, state, &mode_id)) {
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return false;
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}
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}
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uint32_t gamma_lut = crtc->gamma_lut;
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if (state->base->committed & WLR_OUTPUT_STATE_GAMMA_LUT) {
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// Fallback to legacy gamma interface when gamma properties are not
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// available (can happen on older Intel GPUs that support gamma but not
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// degamma).
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if (crtc->props.gamma_lut == 0) {
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if (!drm_legacy_crtc_set_gamma(drm, crtc,
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state->base->gamma_lut_size,
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state->base->gamma_lut)) {
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return false;
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}
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} else {
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if (!create_gamma_lut_blob(drm, state->base->gamma_lut_size,
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state->base->gamma_lut, &gamma_lut)) {
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return false;
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}
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}
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}
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uint32_t fb_damage_clips = 0;
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if ((state->base->committed & WLR_OUTPUT_STATE_DAMAGE) &&
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pixman_region32_not_empty((pixman_region32_t *)&state->base->damage) &&
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crtc->primary->props.fb_damage_clips != 0) {
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int rects_len;
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const pixman_box32_t *rects = pixman_region32_rectangles(
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(pixman_region32_t *)&state->base->damage, &rects_len);
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if (drmModeCreatePropertyBlob(drm->fd, rects,
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sizeof(*rects) * rects_len, &fb_damage_clips) != 0) {
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wlr_log_errno(WLR_ERROR, "Failed to create FB_DAMAGE_CLIPS property blob");
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}
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}
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bool prev_vrr_enabled =
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output->adaptive_sync_status == WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED;
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bool vrr_enabled = prev_vrr_enabled;
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if ((state->base->committed & WLR_OUTPUT_STATE_ADAPTIVE_SYNC_ENABLED) &&
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drm_connector_supports_vrr(conn)) {
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vrr_enabled = state->base->adaptive_sync_enabled;
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}
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if (test_only) {
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flags |= DRM_MODE_ATOMIC_TEST_ONLY;
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}
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if (modeset) {
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flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
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} else if (!test_only && (state->base->committed & WLR_OUTPUT_STATE_BUFFER)) {
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// The wlr_output API requires non-modeset commits with a new buffer to
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// wait for the frame event. However compositors often perform
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// non-modesets commits without a new buffer without waiting for the
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// frame event. In that case we need to make the KMS commit blocking,
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// otherwise the kernel will error out with EBUSY.
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flags |= DRM_MODE_ATOMIC_NONBLOCK;
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}
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drmModeAtomicReq *req = drmModeAtomicAlloc();
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if (req == NULL) {
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wlr_log(WLR_ERROR, "drmModeAtomicAlloc failed");
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return false;
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}
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bool ok = add_prop(req, conn->id, conn->props.crtc_id,
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active ? crtc->id : 0);
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if (modeset && active && conn->props.link_status != 0) {
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ok = ok && add_prop(req, conn->id, conn->props.link_status,
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DRM_MODE_LINK_STATUS_GOOD);
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}
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if (active && conn->props.content_type != 0) {
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ok = ok && add_prop(req, conn->id, conn->props.content_type,
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DRM_MODE_CONTENT_TYPE_GRAPHICS);
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}
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// TODO: set "max bpc"
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ok = ok &&
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add_prop(req, crtc->id, crtc->props.mode_id, mode_id) &&
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add_prop(req, crtc->id, crtc->props.active, active);
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if (active) {
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if (crtc->props.gamma_lut != 0) {
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ok = ok && add_prop(req, crtc->id, crtc->props.gamma_lut, gamma_lut);
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}
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if (crtc->props.vrr_enabled != 0) {
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ok = ok && add_prop(req, crtc->id, crtc->props.vrr_enabled, vrr_enabled);
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}
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ok = ok && set_plane_props(crtc->primary, 0, 0, 0);
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liftoff_layer_set_property(crtc->primary->liftoff_layer,
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"FB_DAMAGE_CLIPS", fb_damage_clips);
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if (crtc->cursor) {
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if (drm_connector_is_cursor_visible(conn)) {
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ok = ok && set_plane_props(crtc->cursor,
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conn->cursor_x, conn->cursor_y, 1);
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} else {
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ok = ok && disable_plane(crtc->cursor);
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}
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}
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} else {
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ok = ok && disable_plane(crtc->primary);
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if (crtc->cursor) {
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ok = ok && disable_plane(crtc->cursor);
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}
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}
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if (!ok) {
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goto out;
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}
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int ret = liftoff_output_apply(crtc->liftoff, req, flags);
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if (ret != 0) {
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wlr_drm_conn_log(conn, test_only ? WLR_DEBUG : WLR_ERROR,
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"liftoff_output_apply failed: %s", strerror(-ret));
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ok = false;
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goto out;
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}
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if (liftoff_layer_needs_composition(crtc->primary->liftoff_layer)) {
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wlr_drm_conn_log(conn, WLR_DEBUG, "Failed to scan-out primary plane");
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ok = false;
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goto out;
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}
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if (crtc->cursor &&
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liftoff_layer_needs_composition(crtc->cursor->liftoff_layer)) {
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wlr_drm_conn_log(conn, WLR_DEBUG, "Failed to scan-out cursor plane");
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ok = false;
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goto out;
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}
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ret = drmModeAtomicCommit(drm->fd, req, flags, drm);
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if (ret != 0) {
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wlr_drm_conn_log_errno(conn, test_only ? WLR_DEBUG : WLR_ERROR,
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"Atomic commit failed");
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ok = false;
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goto out;
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}
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out:
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drmModeAtomicFree(req);
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if (ok && !test_only) {
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commit_blob(drm, &crtc->mode_id, mode_id);
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commit_blob(drm, &crtc->gamma_lut, gamma_lut);
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if (vrr_enabled != prev_vrr_enabled) {
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output->adaptive_sync_status = vrr_enabled ?
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WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED :
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WLR_OUTPUT_ADAPTIVE_SYNC_DISABLED;
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wlr_drm_conn_log(conn, WLR_DEBUG, "VRR %s",
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vrr_enabled ? "enabled" : "disabled");
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}
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} else {
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rollback_blob(drm, &crtc->mode_id, mode_id);
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rollback_blob(drm, &crtc->gamma_lut, gamma_lut);
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}
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if (fb_damage_clips != 0 &&
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drmModeDestroyPropertyBlob(drm->fd, fb_damage_clips) != 0) {
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wlr_log_errno(WLR_ERROR, "Failed to destroy FB_DAMAGE_CLIPS property blob");
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}
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return ok;
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}
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const struct wlr_drm_interface liftoff_iface = {
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.init = init,
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.finish = finish,
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.crtc_commit = crtc_commit,
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};
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