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backend/drm: send output layer feedback events

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This commit is contained in:
Simon Ser 2023-02-06 18:40:44 +01:00
parent e1335a792a
commit 22d9df2af4
4 changed files with 77 additions and 1 deletions
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60
backend/drm/libliftoff.c
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@ -1,6 +1,7 @@
#define _POSIX_C_SOURCE 200809L
#include <fcntl.h>
#include <libliftoff.h>
#include <sys/stat.h>
#include <unistd.h>
#include <wlr/util/log.h>
@ -214,6 +215,62 @@ static bool set_layer_props(struct wlr_drm_backend *drm,
liftoff_layer_set_property(layer->liftoff, "SRC_H", src_h) == 0;
}
static bool devid_from_fd(int fd, dev_t *devid) {
struct stat stat;
if (fstat(fd, &stat) != 0) {
wlr_log_errno(WLR_ERROR, "fstat failed");
return false;
}
*devid = stat.st_rdev;
return true;
}
static void update_layer_feedback(struct wlr_drm_backend *drm,
struct wlr_drm_layer *layer) {
bool changed = false;
for (size_t i = 0; i < drm->num_planes; i++) {
struct wlr_drm_plane *plane = &drm->planes[i];
bool is_candidate = liftoff_layer_is_candidate_plane(layer->liftoff,
plane->liftoff);
if (layer->candidate_planes[i] != is_candidate) {
layer->candidate_planes[i] = is_candidate;
changed = true;
}
}
if (!changed) {
return;
}
dev_t target_device;
if (!devid_from_fd(drm->fd, &target_device)) {
return;
}
struct wlr_drm_format_set formats = {0};
for (size_t i = 0; i < drm->num_planes; i++) {
struct wlr_drm_plane *plane = &drm->planes[i];
if (!layer->candidate_planes[i]) {
continue;
}
for (size_t j = 0; j < plane->formats.len; j++) {
const struct wlr_drm_format *format = plane->formats.formats[j];
for (size_t k = 0; k < format->len; k++) {
wlr_drm_format_set_add(&formats, format->format,
format->modifiers[k]);
}
}
}
struct wlr_output_layer_feedback_event event = {
.target_device = target_device,
.formats = &formats,
};
wl_signal_emit_mutable(&layer->wlr->events.feedback, &event);
wlr_drm_format_set_finish(&formats);
}
static bool crtc_commit(struct wlr_drm_connector *conn,
const struct wlr_drm_connector_state *state, uint32_t flags,
bool test_only) {
@ -380,6 +437,9 @@ static bool crtc_commit(struct wlr_drm_connector *conn,
struct wlr_drm_layer *layer = get_drm_layer(drm, layer_state->layer);
layer_state->accepted =
!liftoff_layer_needs_composition(layer->liftoff);
if (!test_only && !layer_state->accepted) {
update_layer_feedback(drm, layer);
}
}
}