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Merge branch 'edid-change-handling' into 'master'

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Draft: Recreate output on EDID change

See merge request wlroots/wlroots!4425
This commit is contained in:
Andri Yngvason 2023-11-17 10:27:44 +00:00
commit faa6b1de74
2 changed files with 138 additions and 87 deletions
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222
backend/drm/drm.c
View file

@ -1471,7 +1471,9 @@ static bool connect_drm_connector(struct wlr_drm_connector *wlr_conn,
uint8_t *edid = get_drm_prop_blob(drm->fd,
wlr_conn->id, wlr_conn->props.edid, &edid_len);
parse_edid(wlr_conn, edid_len, edid);
free(edid);
wlr_conn->edid = edid;
wlr_conn->edid_len = edid_len;
char *subconnector = NULL;
if (wlr_conn->props.subconnector) {
@ -1500,49 +1502,47 @@ static bool connect_drm_connector(struct wlr_drm_connector *wlr_conn,
static void disconnect_drm_connector(struct wlr_drm_connector *conn);
void scan_drm_connectors(struct wlr_drm_backend *drm,
struct wlr_device_hotplug_event *event) {
if (event != NULL && event->connector_id != 0) {
wlr_log(WLR_INFO, "Scanning DRM connector %"PRIu32" on %s",
event->connector_id, drm->name);
} else {
wlr_log(WLR_INFO, "Scanning DRM connectors on %s", drm->name);
static struct wlr_drm_connector *find_wlr_drm_connector(const struct wlr_drm_backend *drm, uint32_t id) {
struct wlr_drm_connector *c;
wl_list_for_each(c, &drm->connectors, link) {
if (c->id == id) {
return c;
}
}
return NULL;
}
static void update_drm_connector_list(struct wlr_drm_backend *drm) {
drmModeRes *res = drmModeGetResources(drm->fd);
if (!res) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM resources");
return;
}
size_t seen_len = wl_list_length(&drm->connectors);
// +1 so length can never be 0, which is undefined behaviour.
// Last element isn't used.
bool seen[seen_len + 1];
memset(seen, false, sizeof(seen));
size_t new_outputs_len = 0;
struct wlr_drm_connector *new_outputs[res->count_connectors + 1];
for (int i = 0; i < res->count_connectors; ++i) {
uint32_t conn_id = res->connectors[i];
ssize_t index = -1;
struct wlr_drm_connector *c, *wlr_conn = NULL;
wl_list_for_each(c, &drm->connectors, link) {
index++;
if (c->id == conn_id) {
wlr_conn = c;
// Removed:
struct wlr_drm_connector *c, *tmp;
wl_list_for_each_safe(c, tmp, &drm->connectors, link) {
bool found = false;
for (int i = 0; i < res->count_connectors; ++i) {
uint32_t conn_id = res->connectors[i];
if (conn_id == c->id) {
found = true;
break;
}
}
// If the hotplug event contains a connector ID, ignore any other
// connector.
if (event != NULL && event->connector_id != 0 &&
event->connector_id != conn_id) {
if (wlr_conn != NULL) {
seen[index] = true;
}
if (found) {
continue;
}
wlr_log(WLR_INFO, "'%s' disappeared", c->name);
destroy_drm_connector(c);
}
// Added:
for (int i = 0; i < res->count_connectors; ++i) {
uint32_t conn_id = res->connectors[i];
if (find_wlr_drm_connector(drm, conn_id)) {
continue;
}
@ -1552,65 +1552,108 @@ void scan_drm_connectors(struct wlr_drm_backend *drm,
continue;
}
struct wlr_drm_connector *wlr_conn = create_drm_connector(drm, drm_conn);
if (!wlr_conn) {
wlr_conn = create_drm_connector(drm, drm_conn);
if (wlr_conn == NULL) {
continue;
}
wlr_log(WLR_INFO, "Found connector '%s'", wlr_conn->name);
} else {
seen[index] = true;
}
// This can only happen *after* hotplug, since we haven't read the
// connector properties yet
if (wlr_conn->props.link_status != 0) {
uint64_t link_status;
if (!get_drm_prop(drm->fd, wlr_conn->id,
wlr_conn->props.link_status, &link_status)) {
wlr_drm_conn_log(wlr_conn, WLR_ERROR,
"Failed to get link status prop");
continue;
}
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");
disconnect_drm_connector(wlr_conn);
}
}
if (wlr_conn->status == DRM_MODE_DISCONNECTED &&
drm_conn->connection == DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' connected", wlr_conn->name);
if (!connect_drm_connector(wlr_conn, drm_conn)) {
wlr_drm_conn_log(wlr_conn, WLR_ERROR, "Failed to connect DRM connector");
continue;
}
new_outputs[new_outputs_len++] = wlr_conn;
} else if (wlr_conn->status == DRM_MODE_CONNECTED &&
drm_conn->connection != DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' disconnected", wlr_conn->name);
disconnect_drm_connector(wlr_conn);
}
drmModeFreeConnector(drm_conn);
}
drmModeFreeResources(res);
// Iterate in reverse order because we'll remove items from the list and
// still want indices to remain correct.
struct wlr_drm_connector *conn, *tmp_conn;
size_t index = wl_list_length(&drm->connectors);
wl_list_for_each_reverse_safe(conn, tmp_conn, &drm->connectors, link) {
index--;
if (index >= seen_len || seen[index]) {
wlr_log_errno(WLR_ERROR, "Failed to create new connector");
continue;
}
wlr_log(WLR_INFO, "'%s' disappeared", conn->name);
destroy_drm_connector(conn);
wlr_log(WLR_INFO, "Found connector '%s'", wlr_conn->name);
}
drmModeFreeResources(res);
}
static bool scan_single_drm_connector(struct wlr_drm_backend *drm,
struct wlr_drm_connector *wlr_conn) {
bool r = false;
drmModeConnector *drm_conn = drmModeGetConnector(drm->fd, wlr_conn->id);
if (!drm_conn) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM connector");
return false;
}
// This can only happen *after* hotplug, since we haven't read the
// connector properties yet
if (wlr_conn->props.link_status != 0) {
uint64_t link_status;
if (!get_drm_prop(drm->fd, wlr_conn->id,
wlr_conn->props.link_status, &link_status)) {
wlr_drm_conn_log(wlr_conn, WLR_ERROR,
"Failed to get link status prop");
goto out;
}
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");
disconnect_drm_connector(wlr_conn);
}
}
bool is_connected = drm_conn->connection == DRM_MODE_CONNECTED;
bool was_connected = wlr_conn->status == DRM_MODE_CONNECTED;
if (!was_connected && is_connected) {
wlr_log(WLR_INFO, "'%s' connected", wlr_conn->name);
connect_drm_connector(wlr_conn, drm_conn);
r = true;
} else if (was_connected && !is_connected) {
wlr_log(WLR_INFO, "'%s' disconnected", wlr_conn->name);
disconnect_drm_connector(wlr_conn);
} else if (was_connected && is_connected) {
size_t edid_len = 0;
uint8_t *edid = get_drm_prop_blob(drm->fd,
wlr_conn->id, wlr_conn->props.edid, &edid_len);
if (edid_len != wlr_conn->edid_len || memcmp(edid, wlr_conn->edid, edid_len) != 0) {
wlr_log(WLR_INFO, "EDID changed on '%s'", wlr_conn->name);
disconnect_drm_connector(wlr_conn);
connect_drm_connector(wlr_conn, drm_conn);
r = true;
}
free(edid);
}
out:
drmModeFreeConnector(drm_conn);
return r;
}
void scan_drm_connectors(struct wlr_drm_backend *drm,
struct wlr_device_hotplug_event *event) {
if (event != NULL && event->connector_id != 0) {
wlr_log(WLR_INFO, "Scanning DRM connector %"PRIu32" on %s",
event->connector_id, drm->name);
} else {
wlr_log(WLR_INFO, "Scanning DRM connectors on %s", drm->name);
}
update_drm_connector_list(drm);
struct wlr_drm_connector *new_outputs[64];
size_t new_outputs_len = 0;
if (event && event->connector_id) {
struct wlr_drm_connector *c = find_wlr_drm_connector(drm, event->connector_id);
if (c) {
if (scan_single_drm_connector(drm, c)) {
assert(new_outputs_len < sizeof(new_outputs) / sizeof(new_outputs[0]));
new_outputs[new_outputs_len++] = c;
}
} else {
wlr_log(WLR_ERROR, "Missing connector from hotplug event");
}
} else {
struct wlr_drm_connector *c;
wl_list_for_each(c, &drm->connectors, link) {
if (scan_single_drm_connector(drm, c)) {
assert(new_outputs_len < sizeof(new_outputs) / sizeof(new_outputs[0]));
new_outputs[new_outputs_len++] = c;
}
}
}
realloc_crtcs(drm, NULL);
@ -1752,6 +1795,10 @@ static void disconnect_drm_connector(struct wlr_drm_connector *conn) {
// our wlr_drm_connector.
wlr_output_destroy(&conn->output);
free(conn->edid);
conn->edid = NULL;
conn->edid_len = 0;
assert(conn->status == DRM_MODE_DISCONNECTED);
}
@ -1759,6 +1806,7 @@ void destroy_drm_connector(struct wlr_drm_connector *conn) {
disconnect_drm_connector(conn);
wl_list_remove(&conn->link);
free(conn->edid);
free(conn);
}

3
include/backend/drm/drm.h
View file

@ -161,6 +161,9 @@ struct wlr_drm_connector {
* they're sent.
*/
uint32_t pending_page_flip_crtc;
uint8_t *edid;
size_t edid_len;
};
struct wlr_drm_backend *get_drm_backend_from_backend(