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backend/drm: introduce wlr_drm_lease

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Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3183
This commit is contained in:
Simon Ser 2021-11-03 14:03:59 +01:00 • committed by Simon Zeni
parent a37f538ca0
commit 86f5ecf468
5 changed files with 80 additions and 56 deletions
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79
backend/drm/drm.c
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@ -1554,17 +1554,13 @@ int wlr_drm_backend_get_non_master_fd(struct wlr_backend *backend) {
return fd;
}
/* TODO: make the function return a `wlr_drm_lease` to provide a destroy event
* that can be fired when the kernel notifies us through uevent that the lease
* has been destroyed
*/
int wlr_drm_create_lease(struct wlr_output **outputs, size_t n_outputs,
uint32_t *lessee_id) {
struct wlr_drm_lease *wlr_drm_create_lease(struct wlr_output **outputs,
size_t n_outputs, int *lease_fd_ptr) {
assert(outputs);
if (n_outputs == 0) {
wlr_log(WLR_ERROR, "Can't lease 0 outputs");
return -1;
return NULL;
}
struct wlr_drm_backend *drm =
@ -1575,11 +1571,11 @@ int wlr_drm_create_lease(struct wlr_output **outputs, size_t n_outputs,
for (size_t i = 0; i < n_outputs; ++i) {
struct wlr_drm_connector *conn =
get_drm_connector_from_output(outputs[i]);
assert(conn->lessee_id == 0);
assert(conn->lease == NULL);
if (conn->backend != drm) {
wlr_log(WLR_ERROR, "Can't lease output from different backends");
return -1;
return NULL;
}
objects[n_objects++] = conn->id;
@ -1587,7 +1583,7 @@ int wlr_drm_create_lease(struct wlr_output **outputs, size_t n_outputs,
if (!conn->crtc) {
wlr_log(WLR_ERROR, "Connector has no CRTC");
return -1;
return NULL;
}
objects[n_objects++] = conn->crtc->id;
@ -1604,50 +1600,63 @@ int wlr_drm_create_lease(struct wlr_output **outputs, size_t n_outputs,
assert(n_objects != 0);
wlr_log(WLR_DEBUG, "Issuing DRM lease with the %d objects", n_objects);
int lease_fd = drmModeCreateLease(drm->fd, objects, n_objects, 0,
lessee_id);
if (lease_fd < 0) {
return lease_fd;
struct wlr_drm_lease *lease = calloc(1, sizeof(*lease));
if (lease == NULL) {
return NULL;
}
wlr_log(WLR_DEBUG, "Issued DRM lease %"PRIu32, *lessee_id);
lease->backend = drm;
wl_signal_init(&lease->events.destroy);
wlr_log(WLR_DEBUG, "Issuing DRM lease with %d objects", n_objects);
int lease_fd = drmModeCreateLease(drm->fd, objects, n_objects, 0,
&lease->lessee_id);
if (lease_fd < 0) {
free(lease);
return NULL;
}
*lease_fd_ptr = lease_fd;
wlr_log(WLR_DEBUG, "Issued DRM lease %"PRIu32, lease->lessee_id);
for (size_t i = 0; i < n_outputs; ++i) {
struct wlr_drm_connector *conn =
get_drm_connector_from_output(outputs[i]);
conn->lessee_id = *lessee_id;
conn->crtc->lessee_id = *lessee_id;
conn->lease = lease;
conn->crtc->lease = lease;
}
return lease_fd;
return lease;
}
bool wlr_drm_backend_terminate_lease(struct wlr_backend *backend,
uint32_t lessee_id) {
wlr_log(WLR_DEBUG, "Terminating DRM lease %d", lessee_id);
void wlr_drm_lease_terminate(struct wlr_drm_lease *lease) {
struct wlr_drm_backend *drm = lease->backend;
assert(backend);
struct wlr_drm_backend *drm = get_drm_backend_from_backend(backend);
int r = drmModeRevokeLease(drm->fd, lessee_id);
if (r < 0) {
wlr_log_errno(WLR_DEBUG, "Failed to terminate lease");
wlr_log(WLR_DEBUG, "Terminating DRM lease %d", lease->lessee_id);
int ret = drmModeRevokeLease(drm->fd, lease->lessee_id);
if (ret < 0) {
wlr_log_errno(WLR_ERROR, "Failed to terminate lease");
}
drm_lease_destroy(lease);
}
void drm_lease_destroy(struct wlr_drm_lease *lease) {
struct wlr_drm_backend *drm = lease->backend;
wlr_signal_emit_safe(&lease->events.destroy, NULL);
struct wlr_drm_connector *conn;
wl_list_for_each(conn, &drm->outputs, link) {
if (conn->lessee_id == lessee_id) {
conn->lessee_id = 0;
/* Will be re-initialized in scan_drm_connectors */
if (conn->lease == lease) {
conn->lease = NULL;
}
}
for (size_t i = 0; i < drm->num_crtcs; ++i) {
if (drm->crtcs[i].lessee_id == lessee_id) {
drm->crtcs[i].lessee_id = 0;
if (drm->crtcs[i].lease == lease) {
drm->crtcs[i].lease = NULL;
}
}
return r >= 0;
free(lease);
}