drm/fb_helper: Change query for FB designation from drm_fb to drm-fb

Fixes: 1216ea56c2e3 ("drm/fb-helper: Look up preferred fbdev node number from DT")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index a0fcb8a..7d4ed15 100644 (file)
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1868,11 +1868,11 @@ __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper)
         * register the fbdev emulation instance in kernel_fb_helper_list. */
        mutex_unlock(&fb_helper->lock);
 
-       id = of_alias_get_highest_id("drm_fb");
+       id = of_alias_get_highest_id("drm-fb");
        if (id >= 0)
                fb_set_lowest_dynamic_fb(id + 1);
 
-       id = of_alias_get_id(dev->dev->of_node, "drm_fb");
+       id = of_alias_get_id(dev->dev->of_node, "drm-fb");
        if (id >= 0) {
                info->node = id;
                info->custom_fb_num = true;