Commit cd41b448 authored by Jocelyn Falempe's avatar Jocelyn Falempe
Browse files

drm/log: Implement suspend/resume 



Normally the console is already suspended when the graphic driver
suspend callback is called, but if the parameter no_console_suspend
is set, it might still be active.
So call console_stop()/console_start() in the suspend/resume
callbacks, to make sure it won't try to write to the framebuffer
while the graphic driver is suspended.

Signed-off-by: default avatarJocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: default avatarJohn Ogness <john.ogness@linutronix.de>
Acked-by: default avatarPetr Mladek <pmladek@suse.com>
Reviewed-by: default avatarThomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20241204160014.1171469-6-jfalempe@redhat.com
parent 25e2c2a3

drivers/gpu/drm/clients/drm_log.c

+20 −0
Original line number Diff line number Diff line
@@ -310,10 +310,30 @@ static int drm_log_client_hotplug(struct drm_client_dev *client) 
	return 0;

}



static int drm_log_client_suspend(struct drm_client_dev *client, bool _console_lock)

{

	struct drm_log *dlog = client_to_drm_log(client);



	console_stop(&dlog->con);



	return 0;

}



static int drm_log_client_resume(struct drm_client_dev *client, bool _console_lock)

{

	struct drm_log *dlog = client_to_drm_log(client);



	console_start(&dlog->con);



	return 0;

}



static const struct drm_client_funcs drm_log_client_funcs = {

	.owner		= THIS_MODULE,

	.unregister	= drm_log_client_unregister,

	.hotplug	= drm_log_client_hotplug,

	.suspend	= drm_log_client_suspend,

	.resume		= drm_log_client_resume,

};



static void drm_log_write_thread(struct console *con, struct nbcon_write_context *wctxt)