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| author | Jocelyn Falempe <jfalempe@redhat.com> | 2024-07-17 10:48:39 +0200 |
|---|---|---|
| committer | Jocelyn Falempe <jfalempe@redhat.com> | 2024-07-19 11:38:23 +0200 |
| commit | 9f774c42a908affba615bbed7463dd4f904dd5f1 (patch) | |
| tree | 536dc19f360b828feff7aa2a6d5ae220e4c7fdc2 | |
| parent | ef824286128eddaa19cc62fedde198e2055bffff (diff) | |
| download | lwn-9f774c42a908affba615bbed7463dd4f904dd5f1.tar.gz lwn-9f774c42a908affba615bbed7463dd4f904dd5f1.zip | |
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: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20240717090102.968152-2-jfalempe@redhat.com
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_internal.h | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_panic.c | 20 |
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h index 20e9d7b206a2..c10de39cbe83 100644 --- a/drivers/gpu/drm/drm_crtc_internal.h +++ b/drivers/gpu/drm/drm_crtc_internal.h @@ -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__ */ diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c index 8794c7f6c0ee..9f1a3568e62d 100644 --- a/drivers/gpu/drm/drm_panic.c +++ b/drivers/gpu/drm/drm_panic.c @@ -704,6 +704,26 @@ 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. */ |