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Merge branch 'feature/drm_preferred_mode_change' into 'master'

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Draft: backend/drm: notify about preferred mode change

See merge request wlroots/wlroots!5182
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Consolatis 2026-01-31 20:52:55 +01:00
commit e83cc2a63b
1 changed files with 44 additions and 0 deletions
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44
backend/drm/drm.c
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@ -1749,6 +1749,45 @@ static bool connect_drm_connector(struct wlr_drm_connector *wlr_conn,
return true;
}
static void detect_preferred_mode_change(struct wlr_drm_connector *wlr_conn,
const drmModeConnector *drm_conn) {
const drmModeModeInfo *old_preferred = NULL;
const drmModeModeInfo *new_preferred = NULL;
struct wlr_drm_mode *mode;
wl_list_for_each(mode, &wlr_conn->output.modes, wlr_mode.link) {
if (mode->wlr_mode.preferred) {
old_preferred = &mode->drm_mode;
break;
}
}
for (int i = 0; i < drm_conn->count_modes; i++) {
const drmModeModeInfo *new_mode = &drm_conn->modes[i];
if (new_mode->type & DRM_MODE_TYPE_PREFERRED) {
new_preferred = new_mode;
break;
}
}
if (old_preferred && new_preferred && memcmp(old_preferred, new_preferred,
sizeof(*new_preferred)) != 0) {
wlr_log(WLR_INFO, "Preferred mode changed to %dx%d@%.2f",
new_preferred->hdisplay, new_preferred->vdisplay,
(float)calculate_refresh_rate(new_preferred) / 1000
);
struct wlr_output_state state;
wlr_output_state_init(&state);
wlr_output_state_set_custom_mode(&state,
new_preferred->hdisplay, new_preferred->vdisplay,
calculate_refresh_rate(new_preferred)
);
wlr_output_send_request_state(&wlr_conn->output, &state);
wlr_output_state_finish(&state);
}
}
static void disconnect_drm_connector(struct wlr_drm_connector *conn);
void scan_drm_connectors(struct wlr_drm_backend *drm,
@ -1849,6 +1888,11 @@ void scan_drm_connectors(struct wlr_drm_backend *drm,
disconnect_drm_connector(wlr_conn);
}
if (wlr_conn && wlr_conn->status == DRM_MODE_CONNECTED &&
drm_conn->connection == DRM_MODE_CONNECTED) {
detect_preferred_mode_change(wlr_conn, drm_conn);
}
drmModeFreeConnector(drm_conn);
}