Commit 9f774c42 authored by Jocelyn Falempe's avatar Jocelyn Falempe
Browse files

drm/panic: Add drm_panic_is_enabled() 



It allows to check if the drm device supports drm_panic.
Prepare the work to have better integration with fbcon and vtconsole.

Signed-off-by: default avatarJocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: default avatarJavier Martinez Canillas <javierm@redhat.com>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20240717090102.968152-2-jfalempe@redhat.com
parent ef824286

drivers/gpu/drm/drm_crtc_internal.h

+7 −0
Original line number Diff line number Diff line
@@ -317,4 +317,11 @@ drm_edid_load_firmware(struct drm_connector *connector) 
}

#endif



/* drm_panic.c */

#ifdef CONFIG_DRM_PANIC

bool drm_panic_is_enabled(struct drm_device *dev);

#else

bool drm_panic_is_enabled(struct drm_device *dev) {return false; }

#endif



#endif /* __DRM_CRTC_INTERNAL_H__ */

drivers/gpu/drm/drm_panic.c

+20 −0
Original line number Diff line number Diff line
@@ -703,6 +703,26 @@ static void debugfs_register_plane(struct drm_plane *plane, int index) 
static void debugfs_register_plane(struct drm_plane *plane, int index) {}

#endif /* CONFIG_DRM_PANIC_DEBUG */



/**

 * drm_panic_is_enabled

 * @dev: the drm device that may supports drm_panic

 *

 * returns true if the drm device supports drm_panic

 */

bool drm_panic_is_enabled(struct drm_device *dev)

{

	struct drm_plane *plane;



	if (!dev->mode_config.num_total_plane)

		return false;



	drm_for_each_plane(plane, dev)

		if (plane->helper_private && plane->helper_private->get_scanout_buffer)

			return true;

	return false;

}

EXPORT_SYMBOL(drm_panic_is_enabled);



/**

 * drm_panic_register() - Initialize DRM panic for a device

 * @dev: the drm device on which the panic screen will be displayed.