backend/wayland: add basic linux-dmabuf feedback support
This patch makes it so we bind to zwp_linux_dmabuf_v1 version 4 and we use it to grab the main device. v4 sends supported formats via a table so we need to handle this as well. v4 allows wlroots to remove the requirement for Mesa's internal wl_drm interface.
This commit is contained in:
Simon Ser
Kirill Primak
parent
8e566f716c
commit
9f41627aa1
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@ -4,6 +4,8 @@
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#include <limits.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <drm_fourcc.h>
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@ -30,6 +32,21 @@
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#include "tablet-unstable-v2-client-protocol.h"
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#include "relative-pointer-unstable-v1-client-protocol.h"
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struct wlr_wl_linux_dmabuf_feedback_v1 {
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struct wlr_wl_backend *backend;
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dev_t main_device_id;
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struct wlr_wl_linux_dmabuf_v1_table_entry *format_table;
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size_t format_table_size;
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dev_t tranche_target_device_id;
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};
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struct wlr_wl_linux_dmabuf_v1_table_entry {
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uint32_t format;
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uint32_t pad; /* unused */
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uint64_t modifier;
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};
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struct wlr_wl_backend *get_wl_backend_from_backend(struct wlr_backend *backend) {
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assert(wlr_backend_is_wl(backend));
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return (struct wlr_wl_backend *)backend;
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@ -108,6 +125,119 @@ static const struct zwp_linux_dmabuf_v1_listener linux_dmabuf_v1_listener = {
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.modifier = linux_dmabuf_v1_handle_modifier,
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};
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static void linux_dmabuf_feedback_v1_handle_done(void *data,
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struct zwp_linux_dmabuf_feedback_v1 *feedback) {
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// This space is intentionally left blank
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}
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static void linux_dmabuf_feedback_v1_handle_format_table(void *data,
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struct zwp_linux_dmabuf_feedback_v1 *feedback, int fd, uint32_t size) {
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struct wlr_wl_linux_dmabuf_feedback_v1 *feedback_data = data;
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feedback_data->format_table = NULL;
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void *table_data = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
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if (table_data == MAP_FAILED) {
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wlr_log_errno(WLR_ERROR, "failed to mmap DMA-BUF format table");
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} else {
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feedback_data->format_table = table_data;
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feedback_data->format_table_size = size;
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}
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close(fd);
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}
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static void linux_dmabuf_feedback_v1_handle_main_device(void *data,
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struct zwp_linux_dmabuf_feedback_v1 *feedback,
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struct wl_array *dev_id_arr) {
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struct wlr_wl_linux_dmabuf_feedback_v1 *feedback_data = data;
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dev_t dev_id;
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assert(dev_id_arr->size == sizeof(dev_id));
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memcpy(&dev_id, dev_id_arr->data, sizeof(dev_id));
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feedback_data->main_device_id = dev_id;
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drmDevice *device = NULL;
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if (drmGetDeviceFromDevId(dev_id, 0, &device) != 0) {
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wlr_log_errno(WLR_ERROR, "drmGetDeviceFromDevId failed");
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return;
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}
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const char *name = NULL;
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if (device->available_nodes & (1 << DRM_NODE_RENDER)) {
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name = device->nodes[DRM_NODE_RENDER];
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} else {
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// Likely a split display/render setup. Pick the primary node and hope
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// Mesa will open the right render node under-the-hood.
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assert(device->available_nodes & (1 << DRM_NODE_PRIMARY));
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name = device->nodes[DRM_NODE_PRIMARY];
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wlr_log(WLR_DEBUG, "DRM device %s has no render node, "
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"falling back to primary node", name);
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}
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feedback_data->backend->drm_render_name = strdup(name);
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drmFreeDevice(&device);
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}
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static void linux_dmabuf_feedback_v1_handle_tranche_done(void *data,
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struct zwp_linux_dmabuf_feedback_v1 *feedback) {
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struct wlr_wl_linux_dmabuf_feedback_v1 *feedback_data = data;
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feedback_data->tranche_target_device_id = 0;
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}
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static void linux_dmabuf_feedback_v1_handle_tranche_target_device(void *data,
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struct zwp_linux_dmabuf_feedback_v1 *feedback,
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struct wl_array *dev_id_arr) {
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struct wlr_wl_linux_dmabuf_feedback_v1 *feedback_data = data;
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dev_t dev_id;
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assert(dev_id_arr->size == sizeof(dev_id));
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memcpy(&dev_id, dev_id_arr->data, sizeof(dev_id));
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feedback_data->tranche_target_device_id = dev_id;
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}
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static void linux_dmabuf_feedback_v1_handle_tranche_formats(void *data,
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struct zwp_linux_dmabuf_feedback_v1 *feedback,
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struct wl_array *indices_arr) {
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struct wlr_wl_linux_dmabuf_feedback_v1 *feedback_data = data;
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if (feedback_data->format_table == NULL) {
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return;
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}
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if (feedback_data->tranche_target_device_id != feedback_data->main_device_id) {
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return;
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}
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size_t table_cap = feedback_data->format_table_size /
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sizeof(struct wlr_wl_linux_dmabuf_v1_table_entry);
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uint16_t *index_ptr;
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wl_array_for_each(index_ptr, indices_arr) {
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assert(*index_ptr < table_cap);
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const struct wlr_wl_linux_dmabuf_v1_table_entry *entry =
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&feedback_data->format_table[*index_ptr];
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wlr_drm_format_set_add(&feedback_data->backend->linux_dmabuf_v1_formats,
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entry->format, entry->modifier);
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}
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}
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static void linux_dmabuf_feedback_v1_handle_tranche_flags(void *data,
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struct zwp_linux_dmabuf_feedback_v1 *feedback, uint32_t flags) {
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// TODO: handle SCANOUT flag
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}
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static const struct zwp_linux_dmabuf_feedback_v1_listener
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linux_dmabuf_feedback_v1_listener = {
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.done = linux_dmabuf_feedback_v1_handle_done,
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.format_table = linux_dmabuf_feedback_v1_handle_format_table,
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.main_device = linux_dmabuf_feedback_v1_handle_main_device,
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.tranche_done = linux_dmabuf_feedback_v1_handle_tranche_done,
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.tranche_target_device = linux_dmabuf_feedback_v1_handle_tranche_target_device,
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.tranche_formats = linux_dmabuf_feedback_v1_handle_tranche_formats,
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.tranche_flags = linux_dmabuf_feedback_v1_handle_tranche_flags,
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};
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static bool device_has_name(const drmDevice *device, const char *name) {
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for (size_t i = 0; i < DRM_NODE_MAX; i++) {
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if (!(device->available_nodes & (1 << i))) {
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@ -172,8 +302,6 @@ static char *get_render_name(const char *name) {
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static void legacy_drm_handle_device(void *data, struct wl_drm *drm,
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const char *name) {
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struct wlr_wl_backend *wl = data;
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// TODO: get FD from linux-dmabuf hints instead
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wl->drm_render_name = get_render_name(name);
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}
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@ -245,7 +373,7 @@ static void registry_global(void *data, struct wl_registry *registry,
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} else if (strcmp(iface, zwp_linux_dmabuf_v1_interface.name) == 0 &&
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version >= 3) {
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wl->zwp_linux_dmabuf_v1 = wl_registry_bind(registry, name,
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&zwp_linux_dmabuf_v1_interface, 3);
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&zwp_linux_dmabuf_v1_interface, version >= 4 ? 4 : version);
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zwp_linux_dmabuf_v1_add_listener(wl->zwp_linux_dmabuf_v1,
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&linux_dmabuf_v1_listener, wl);
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} else if (strcmp(iface, zwp_relative_pointer_manager_v1_interface.name) == 0) {
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@ -428,10 +556,9 @@ struct wlr_backend *wlr_wl_backend_create(struct wl_display *display,
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wlr_log_errno(WLR_ERROR, "Could not obtain reference to remote registry");
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goto error_display;
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}
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wl_registry_add_listener(wl->registry, ®istry_listener, wl);
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wl_display_roundtrip(wl->remote_display); // get globals
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wl_display_roundtrip(wl->remote_display); // get linux-dmabuf formats
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if (!wl->compositor) {
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wlr_log(WLR_ERROR,
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@ -444,6 +571,35 @@ struct wlr_backend *wlr_wl_backend_create(struct wl_display *display,
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goto error_registry;
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}
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struct zwp_linux_dmabuf_feedback_v1 *linux_dmabuf_feedback_v1 = NULL;
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struct wlr_wl_linux_dmabuf_feedback_v1 feedback_data = { .backend = wl };
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if (wl->zwp_linux_dmabuf_v1 != NULL &&
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zwp_linux_dmabuf_v1_get_version(wl->zwp_linux_dmabuf_v1) >=
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ZWP_LINUX_DMABUF_V1_GET_DEFAULT_FEEDBACK_SINCE_VERSION) {
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linux_dmabuf_feedback_v1 =
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zwp_linux_dmabuf_v1_get_default_feedback(wl->zwp_linux_dmabuf_v1);
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if (linux_dmabuf_feedback_v1 == NULL) {
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wlr_log(WLR_ERROR, "Allocation failed");
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goto error_registry;
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}
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zwp_linux_dmabuf_feedback_v1_add_listener(linux_dmabuf_feedback_v1,
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&linux_dmabuf_feedback_v1_listener, &feedback_data);
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if (wl->legacy_drm != NULL) {
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wl_drm_destroy(wl->legacy_drm);
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wl->legacy_drm = NULL;
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}
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}
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wl_display_roundtrip(wl->remote_display); // get linux-dmabuf formats
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if (feedback_data.format_table != NULL) {
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munmap(feedback_data.format_table, feedback_data.format_table_size);
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}
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if (linux_dmabuf_feedback_v1 != NULL) {
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zwp_linux_dmabuf_feedback_v1_destroy(linux_dmabuf_feedback_v1);
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}
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struct wl_event_loop *loop = wl_display_get_event_loop(wl->local_display);
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int fd = wl_display_get_fd(wl->remote_display);
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wl->remote_display_src = wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
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@ -105,7 +105,7 @@ wayland_server = dependency('wayland-server',
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)
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drm = dependency('libdrm',
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version: '>=2.4.108',
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version: '>=2.4.109',
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fallback: ['libdrm', 'ext_libdrm'],
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default_options: [
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'libkms=false',
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