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drm/client: Add hotplug_failed flag

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Signal failed hotplugging with a flag in struct drm_client_dev. If set,
the client helpers will not further try to set up the fbdev display.

This used to be signalled with a combination of cleared pointers in
struct drm_fb_helper, which prevents us from initializing these pointers
early after allocation.

The change also harmonizes behavior among DRM clients. Additional DRM
clients will now handle failed hotplugging like fbdev does.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230125200415.14123-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2023-01-25 21:04:07 +01:00
parent c2bb3be64e
commit 6a9d5ad3af
3 changed files with 13 additions and 4 deletions
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5
drivers/gpu/drm/drm_client.c
View File

@ -208,8 +208,13 @@ void drm_client_dev_hotplug(struct drm_device *dev)
if (!client->funcs || !client->funcs->hotplug)
continue;
if (client->hotplug_failed)
continue;
ret = client->funcs->hotplug(client);
drm_dbg_kms(dev, "%s: ret=%d\n", client->name, ret);
if (ret)
client->hotplug_failed = true;
}
mutex_unlock(&dev->clientlist_mutex);
}

4
drivers/gpu/drm/drm_fbdev_generic.c
View File

@ -382,10 +382,6 @@ static int drm_fbdev_client_hotplug(struct drm_client_dev *client)
struct drm_device *dev = client->dev;
int ret;
/* Setup is not retried if it has failed */
if (!fb_helper->dev && fb_helper->funcs)
return 0;
if (dev->fb_helper)
return drm_fb_helper_hotplug_event(dev->fb_helper);

8
include/drm/drm_client.h
View File

@ -106,6 +106,14 @@ struct drm_client_dev {
* @modesets: CRTC configurations
*/
struct drm_mode_set *modesets;
/**
* @hotplug failed:
*
* Set by client hotplug helpers if the hotplugging failed
* before. It is usually not tried again.
*/
bool hotplug_failed;
};
int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,