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drm/log: Implement suspend/resume

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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: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: John Ogness <john.ogness@linutronix.de>
Acked-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20241204160014.1171469-6-jfalempe@redhat.com
This commit is contained in:
Jocelyn Falempe 2024-12-04 16:45:04 +01:00
parent 25e2c2a3ef
commit cd41b4489c
1 changed files with 20 additions and 0 deletions
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20
drivers/gpu/drm/clients/drm_log.c
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@ -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)