diff options
Diffstat (limited to 'include/drm/drm_panic.h')
| -rw-r--r-- | include/drm/drm_panic.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/include/drm/drm_panic.h b/include/drm/drm_panic.h index 967e02ccc6d5..822dbb1aa9d6 100644 --- a/include/drm/drm_panic.h +++ b/include/drm/drm_panic.h @@ -2,12 +2,57 @@ #ifndef __DRM_PANIC_H__ #define __DRM_PANIC_H__ +#include <linux/module.h> +#include <linux/types.h> +#include <linux/iosys-map.h> + #include <drm/drm_device.h> +#include <drm/drm_fourcc.h> /* * Copyright (c) 2024 Intel */ /** + * struct drm_scanout_buffer - DRM scanout buffer + * + * This structure holds the information necessary for drm_panic to draw the + * panic screen, and display it. + */ +struct drm_scanout_buffer { + /** + * @format: + * + * drm format of the scanout buffer. + */ + const struct drm_format_info *format; + + /** + * @map: + * + * Virtual address of the scanout buffer, either in memory or iomem. + * The scanout buffer should be in linear format, and can be directly + * sent to the display hardware. Tearing is not an issue for the panic + * screen. + */ + struct iosys_map map[DRM_FORMAT_MAX_PLANES]; + + /** + * @width: Width of the scanout buffer, in pixels. + */ + unsigned int width; + + /** + * @height: Height of the scanout buffer, in pixels. + */ + unsigned int height; + + /** + * @pitch: Length in bytes between the start of two consecutive lines. + */ + unsigned int pitch[DRM_FORMAT_MAX_PLANES]; +}; + +/** * drm_panic_trylock - try to enter the panic printing critical section * @dev: struct drm_device * @flags: unsigned long irq flags you need to pass to the unlock() counterpart @@ -92,4 +137,16 @@ #define drm_panic_unlock(dev, flags) \ raw_spin_unlock_irqrestore(&(dev)->mode_config.panic_lock, flags) +#ifdef CONFIG_DRM_PANIC + +void drm_panic_register(struct drm_device *dev); +void drm_panic_unregister(struct drm_device *dev); + +#else + +static inline void drm_panic_register(struct drm_device *dev) {} +static inline void drm_panic_unregister(struct drm_device *dev) {} + +#endif + #endif /* __DRM_PANIC_H__ */ |