drm/client: Test for connectors before sending hotplug event

Test for connectors in the client code and remove a similar test
from the generic fbdev emulation. Do nothing if the test fails.
Not having connectors indicates a driver bug.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230125200415.14123-2-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index 262ec64..09ac191 100644 (file)
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -198,6 +198,11 @@ void drm_client_dev_hotplug(struct drm_device *dev)
        if (!drm_core_check_feature(dev, DRIVER_MODESET))
                return;
 
+       if (!dev->mode_config.num_connector) {
+               drm_dbg_kms(dev, "No connectors found, will not send hotplug events!\n");
+               return;
+       }
+
        mutex_lock(&dev->clientlist_mutex);
        list_for_each_entry(client, &dev->clientlist, list) {
                if (!client->funcs || !client->funcs->hotplug)

diff --git a/drivers/gpu/drm/drm_fbdev_generic.c b/drivers/gpu/drm/drm_fbdev_generic.c
index 0a4c160..3d455a2 100644 (file)
--- a/drivers/gpu/drm/drm_fbdev_generic.c
+++ b/drivers/gpu/drm/drm_fbdev_generic.c
@@ -389,11 +389,6 @@ static int drm_fbdev_client_hotplug(struct drm_client_dev *client)
        if (dev->fb_helper)
                return drm_fb_helper_hotplug_event(dev->fb_helper);
 
-       if (!dev->mode_config.num_connector) {
-               drm_dbg_kms(dev, "No connectors found, will not create framebuffer!\n");
-               return 0;
-       }
-
        drm_fb_helper_prepare(dev, fb_helper, &drm_fb_helper_generic_funcs);
 
        ret = drm_fb_helper_init(dev, fb_helper);