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backend/drm: refactor wlr_output destruction

Browse source 
Instead of hand-rolling our own manual wlr_output cleanup function, rely
on wlr_output_destroy to remove an output from the compositor's state.
This commit is contained in:
Simon Ser 2020-12-09 15:15:17 +01:00
parent 019ffe8a5b
commit 248c7787c7
3 changed files with 49 additions and 59 deletions
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2
backend/drm/backend.c
View file

@ -38,7 +38,7 @@ static void backend_destroy(struct wlr_backend *backend) {
struct wlr_drm_connector *conn, *next;
wl_list_for_each_safe(conn, next, &drm->outputs, link) {
wlr_output_destroy(&conn->output);
destroy_drm_connector(conn);
}
wlr_signal_emit_safe(&backend->events.destroy, backend);

105
backend/drm/drm.c
View file

@ -767,8 +767,6 @@ static void attempt_enable_needs_modeset(struct wlr_drm_backend *drm) {
}
}
static void drm_connector_cleanup(struct wlr_drm_connector *conn);
bool drm_connector_set_mode(struct wlr_drm_connector *conn,
struct wlr_output_mode *wlr_mode) {
struct wlr_drm_backend *drm = conn->backend;
@ -1004,18 +1002,38 @@ bool drm_connector_is_cursor_visible(struct wlr_drm_connector *conn) {
conn->cursor_y + (int)plane->surf.height >= 0;
}
static void drm_connector_destroy(struct wlr_output *output) {
static void dealloc_crtc(struct wlr_drm_connector *conn);
/**
* Destroy the compositor-facing part of a connector.
*
* The connector isn't destroyed when disconnected. Only the compositor-facing
* wlr_output interface is cleaned up.
*/
static void drm_connector_destroy_output(struct wlr_output *output) {
struct wlr_drm_connector *conn = get_drm_connector_from_output(output);
drm_connector_cleanup(conn);
drmModeFreeCrtc(conn->old_crtc);
wl_list_remove(&conn->link);
free(conn);
dealloc_crtc(conn);
conn->state = WLR_DRM_CONN_DISCONNECTED;
conn->desired_enabled = false;
conn->desired_mode = NULL;
conn->possible_crtc = 0;
conn->pageflip_pending = false;
struct wlr_drm_mode *mode, *mode_tmp;
wl_list_for_each_safe(mode, mode_tmp, &conn->output.modes, wlr_mode.link) {
wl_list_remove(&mode->wlr_mode.link);
free(mode);
}
memset(&conn->output, 0, sizeof(struct wlr_output));
}
static const struct wlr_output_impl output_impl = {
.set_cursor = drm_connector_set_cursor,
.move_cursor = drm_connector_move_cursor,
.destroy = drm_connector_destroy,
.destroy = drm_connector_destroy_output,
.attach_render = drm_connector_attach_render,
.test = drm_connector_test,
.commit = drm_connector_commit,
@ -1202,6 +1220,8 @@ static uint32_t get_possible_crtcs(int fd, drmModeRes *res,
return possible_crtcs;
}
static void disconnect_drm_connector(struct wlr_drm_connector *conn);
void scan_drm_connectors(struct wlr_drm_backend *drm) {
/*
* This GPU is not really a modesetting device.
@ -1255,8 +1275,6 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
drmModeFreeConnector(drm_conn);
continue;
}
wlr_output_init(&wlr_conn->output, &drm->backend, &output_impl,
drm->display);
wlr_conn->backend = drm;
wlr_conn->state = WLR_DRM_CONN_DISCONNECTED;
@ -1301,7 +1319,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
if (link_status == DRM_MODE_LINK_STATUS_BAD) {
// We need to reload our list of modes and force a modeset
wlr_drm_conn_log(wlr_conn, WLR_INFO, "Bad link detected");
drm_connector_cleanup(wlr_conn);
disconnect_drm_connector(wlr_conn);
}
}
@ -1311,6 +1329,9 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
wlr_log(WLR_DEBUG, "Current CRTC: %d",
wlr_conn->crtc ? (int)wlr_conn->crtc->id : -1);
wlr_output_init(&wlr_conn->output, &drm->backend, &output_impl,
drm->display);
strncpy(wlr_conn->output.name, wlr_conn->name,
sizeof(wlr_conn->output.name) - 1);
@ -1380,8 +1401,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
wlr_conn->state == WLR_DRM_CONN_NEEDS_MODESET) &&
drm_conn->connection != DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' disconnected", wlr_conn->name);
drm_connector_cleanup(wlr_conn);
disconnect_drm_connector(wlr_conn);
}
drmModeFreeEncoder(curr_enc);
@ -1401,9 +1421,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
}
wlr_log(WLR_INFO, "'%s' disappeared", conn->name);
drm_connector_cleanup(conn);
wlr_output_destroy(&conn->output);
disconnect_drm_connector(conn);
}
realloc_crtcs(drm);
@ -1536,49 +1554,20 @@ void restore_drm_outputs(struct wlr_drm_backend *drm) {
}
}
static void drm_connector_cleanup(struct wlr_drm_connector *conn) {
if (!conn) {
static void disconnect_drm_connector(struct wlr_drm_connector *conn) {
if (conn->state == WLR_DRM_CONN_DISCONNECTED) {
return;
}
switch (conn->state) {
case WLR_DRM_CONN_CONNECTED:
case WLR_DRM_CONN_CLEANUP:
conn->output.current_mode = NULL;
conn->desired_mode = NULL;
struct wlr_drm_mode *mode, *tmp;
wl_list_for_each_safe(mode, tmp, &conn->output.modes, wlr_mode.link) {
wl_list_remove(&mode->wlr_mode.link);
free(mode);
}
conn->output.enabled = false;
conn->output.width = conn->output.height = conn->output.refresh = 0;
if (conn->output.idle_frame != NULL) {
wl_event_source_remove(conn->output.idle_frame);
conn->output.idle_frame = NULL;
}
conn->output.needs_frame = false;
conn->output.frame_pending = false;
/* Fallthrough */
case WLR_DRM_CONN_NEEDS_MODESET:
wlr_log(WLR_INFO, "Emitting destruction signal for '%s'",
conn->output.name);
dealloc_crtc(conn);
conn->possible_crtc = 0;
conn->desired_mode = NULL;
conn->pageflip_pending = false;
wlr_signal_emit_safe(&conn->output.events.destroy, &conn->output);
memset(&conn->output.make, 0, sizeof(conn->output.make));
memset(&conn->output.model, 0, sizeof(conn->output.model));
memset(&conn->output.serial, 0, sizeof(conn->output.serial));
break;
case WLR_DRM_CONN_DISCONNECTED:
break;
}
conn->state = WLR_DRM_CONN_DISCONNECTED;
// This will cleanup the compositor-facing wlr_output, but won't destroy
// our wlr_drm_connector.
wlr_output_destroy(&conn->output);
}
void destroy_drm_connector(struct wlr_drm_connector *conn) {
disconnect_drm_connector(conn);
drmModeFreeCrtc(conn->old_crtc);
wl_list_remove(&conn->link);
free(conn);
}

1
include/backend/drm/drm.h
View file

@ -147,6 +147,7 @@ void finish_drm_resources(struct wlr_drm_backend *drm);
void restore_drm_outputs(struct wlr_drm_backend *drm);
void scan_drm_connectors(struct wlr_drm_backend *state);
int handle_drm_event(int fd, uint32_t mask, void *data);
void destroy_drm_connector(struct wlr_drm_connector *conn);
bool drm_connector_set_mode(struct wlr_drm_connector *conn,
struct wlr_output_mode *mode);
bool drm_connector_is_cursor_visible(struct wlr_drm_connector *conn);