瀏覽代碼

drm/fb_helper: move deferred fb checking into restore mode (v2)

On MST systems the monitors don't appear when we set the fb up,
but plymouth opens the drm device and holds it open while they
come up, when plymouth finishes and lastclose gets called we
don't do the delayed fb probe, so the monitor never appears on the
console.

Fix this by moving the delayed checking into the mode restore.

v2: Daniel suggested that ->delayed_hotplug is set under
the mode_config mutex, so we should check it under that as
well, while we are in the area.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Dave Airlie 10 年之前
父節點
當前提交
e2809c7db8
共有 1 個文件被更改,包括 9 次插入4 次删除
  1. 9 4
      drivers/gpu/drm/drm_fb_helper.c

+ 9 - 4
drivers/gpu/drm/drm_fb_helper.c

@@ -347,9 +347,18 @@ bool drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
 {
 {
 	struct drm_device *dev = fb_helper->dev;
 	struct drm_device *dev = fb_helper->dev;
 	bool ret;
 	bool ret;
+	bool do_delayed = false;
+
 	drm_modeset_lock_all(dev);
 	drm_modeset_lock_all(dev);
 	ret = restore_fbdev_mode(fb_helper);
 	ret = restore_fbdev_mode(fb_helper);
+
+	do_delayed = fb_helper->delayed_hotplug;
+	if (do_delayed)
+		fb_helper->delayed_hotplug = false;
 	drm_modeset_unlock_all(dev);
 	drm_modeset_unlock_all(dev);
+
+	if (do_delayed)
+		drm_fb_helper_hotplug_event(fb_helper);
 	return ret;
 	return ret;
 }
 }
 EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked);
 EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked);
@@ -888,10 +897,6 @@ int drm_fb_helper_set_par(struct fb_info *info)
 
 
 	drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 	drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 
 
-	if (fb_helper->delayed_hotplug) {
-		fb_helper->delayed_hotplug = false;
-		drm_fb_helper_hotplug_event(fb_helper);
-	}
 	return 0;
 	return 0;
 }
 }
 EXPORT_SYMBOL(drm_fb_helper_set_par);
 EXPORT_SYMBOL(drm_fb_helper_set_par);