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Diffstat (limited to 'backend/drm/drm.c')
-rw-r--r--backend/drm/drm.c65
1 files changed, 38 insertions, 27 deletions
diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index 97028dc7..0acb0324 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -991,36 +991,43 @@ static void realloc_crtcs(struct wlr_drm_backend *drm, bool *changed_outputs) {
}
}
-static uint32_t get_possible_crtcs(int fd, uint32_t conn_id) {
- drmModeConnector *conn = drmModeGetConnector(fd, conn_id);
- if (!conn) {
- wlr_log_errno(WLR_ERROR, "Failed to get DRM connector");
- return 0;
- }
+static uint32_t get_possible_crtcs(int fd, drmModeRes *res,
+ drmModeConnector *conn, bool is_mst) {
+ uint32_t ret = 0;
- if (conn->connection != DRM_MODE_CONNECTED || conn->count_modes == 0) {
- wlr_log(WLR_ERROR, "Output is not connected");
- goto error_conn;
+ for (int i = 0; i < conn->count_encoders; ++i) {
+ drmModeEncoder *enc = drmModeGetEncoder(fd, conn->encoders[i]);
+ if (!enc) {
+ continue;
+ }
+
+ ret |= enc->possible_crtcs;
+
+ drmModeFreeEncoder(enc);
}
- drmModeEncoder *enc = NULL;
- for (int i = 0; !enc && i < conn->count_encoders; ++i) {
- enc = drmModeGetEncoder(fd, conn->encoders[i]);
+ // Sometimes DP MST connectors report no encoders, so we'll loop though
+ // all of the encoders of the MST type instead.
+ // TODO: See if there is a better solution.
+
+ if (!is_mst || ret) {
+ return ret;
}
- if (!enc) {
- wlr_log(WLR_ERROR, "Failed to get DRM encoder");
- goto error_conn;
+ for (int i = 0; i < res->count_encoders; ++i) {
+ drmModeEncoder *enc = drmModeGetEncoder(fd, res->encoders[i]);
+ if (!enc) {
+ continue;
+ }
+
+ if (enc->encoder_type == DRM_MODE_ENCODER_DPMST) {
+ ret |= enc->possible_crtcs;
+ }
+
+ drmModeFreeEncoder(enc);
}
- uint32_t ret = enc->possible_crtcs;
- drmModeFreeEncoder(enc);
- drmModeFreeConnector(conn);
return ret;
-
-error_conn:
- drmModeFreeConnector(conn);
- return 0;
}
void scan_drm_connectors(struct wlr_drm_backend *drm) {
@@ -1050,7 +1057,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
drmModeEncoder *curr_enc = drmModeGetEncoder(drm->fd,
drm_conn->encoder_id);
- int index = -1;
+ ssize_t index = -1;
struct wlr_drm_connector *c, *wlr_conn = NULL;
wl_list_for_each(c, &drm->outputs, link) {
index++;
@@ -1086,7 +1093,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
wlr_conn->old_crtc = drmModeGetCrtc(drm->fd, curr_enc->crtc_id);
}
- wl_list_insert(&drm->outputs, &wlr_conn->link);
+ wl_list_insert(drm->outputs.prev, &wlr_conn->link);
wlr_log(WLR_INFO, "Found connector '%s'", wlr_conn->output.name);
} else {
seen[index] = true;
@@ -1167,7 +1174,8 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
wl_list_insert(&wlr_conn->output.modes, &mode->wlr_mode.link);
}
- wlr_conn->possible_crtc = get_possible_crtcs(drm->fd, wlr_conn->id);
+ wlr_conn->possible_crtc = get_possible_crtcs(drm->fd, res, drm_conn,
+ wlr_conn->props.path != 0);
if (wlr_conn->possible_crtc == 0) {
wlr_log(WLR_ERROR, "No CRTC possible for connector '%s'",
wlr_conn->output.name);
@@ -1178,7 +1186,8 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
wlr_conn->state = WLR_DRM_CONN_NEEDS_MODESET;
new_outputs[new_outputs_len++] = wlr_conn;
- } else if (wlr_conn->state == WLR_DRM_CONN_CONNECTED &&
+ } else if ((wlr_conn->state == WLR_DRM_CONN_CONNECTED ||
+ wlr_conn->state == WLR_DRM_CONN_NEEDS_MODESET) &&
drm_conn->connection != DRM_MODE_CONNECTED) {
wlr_log(WLR_INFO, "'%s' disconnected", wlr_conn->output.name);
@@ -1191,9 +1200,11 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
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->outputs);
- wl_list_for_each_safe(conn, tmp_conn, &drm->outputs, link) {
+ wl_list_for_each_reverse_safe(conn, tmp_conn, &drm->outputs, link) {
index--;
if (index >= seen_len || seen[index]) {
continue;