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Check for disappearing DRM connectors

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DisplayPort MST connectors will disappear when they're disconnected, so
we need to check for that.
This commit is contained in:
Scott Anderson 2017-09-09 22:41:23 +12:00
parent f4faa731f0
commit 0aa00da1f3
1 changed files with 24 additions and 2 deletions
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26
backend/drm/drm.c
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@ -748,6 +748,11 @@ void wlr_drm_scan_connectors(struct wlr_drm_backend *backend) {
return;
}
size_t seen_len = backend->outputs->length;
// +1 so it can never be 0
bool seen[seen_len + 1];
memset(seen, 0, sizeof(seen));
for (int i = 0; i < res->count_connectors; ++i) {
drmModeConnector *conn = drmModeGetConnector(backend->fd,
res->connectors[i]);
@ -791,7 +796,7 @@ void wlr_drm_scan_connectors(struct wlr_drm_backend *backend) {
size_t edid_len = 0;
uint8_t *edid = wlr_drm_get_prop_blob(backend->fd,
output->connector, output->props.edid, &edid_len);
output->connector, output->props.edid, &edid_len);
parse_edid(&output->output, edid_len, edid);
free(edid);
@ -805,6 +810,7 @@ void wlr_drm_scan_connectors(struct wlr_drm_backend *backend) {
wlr_log(L_INFO, "Found display '%s'", output->output.name);
} else {
output = backend->outputs->items[index];
seen[index] = true;
}
if (output->state == WLR_DRM_OUTPUT_DISCONNECTED &&
@ -815,7 +821,7 @@ void wlr_drm_scan_connectors(struct wlr_drm_backend *backend) {
for (int i = 0; i < conn->count_modes; ++i) {
struct wlr_drm_output_mode *mode = calloc(1,
sizeof(struct wlr_drm_output_mode));
sizeof(struct wlr_drm_output_mode));
if (!mode) {
wlr_log_errno(L_ERROR, "Allocation failed");
continue;
@ -850,6 +856,22 @@ void wlr_drm_scan_connectors(struct wlr_drm_backend *backend) {
}
drmModeFreeResources(res);
for (size_t i = seen_len; i-- > 0;) {
if (seen[i]) {
continue;
}
struct wlr_drm_output *output = backend->outputs->items[i];
wlr_log(L_INFO, "'%s' disappeared", output->output.name);
wlr_drm_output_cleanup(output, false);
drmModeFreeCrtc(output->old_crtc);
free(output);
list_del(backend->outputs, i);
}
}
static void page_flip_handler(int fd, unsigned seq,