drm_panic.h

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/* SPDX-License-Identifier: GPL-2.0 or MIT */
 
/*
 * Copyright (c) 2024 Intel
 * Copyright (c) 2024 Red Hat
 */
 
#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>
 
struct drm_scanout_buffer {
    const struct drm_format_info *format;
 
    struct iosys_map map[DRM_FORMAT_MAX_PLANES];
 
    struct page **pages;
 
    unsigned int width;
 
    unsigned int height;
 
    unsigned int pitch[DRM_FORMAT_MAX_PLANES];
 
    void (*set_pixel)(struct drm_scanout_buffer *sb, unsigned int x,
              unsigned int y, u32 color);
 
    void *private;
 
};
 
#ifdef CONFIG_DRM_PANIC
 
#define drm_panic_trylock(dev, flags) \
    raw_spin_trylock_irqsave(&(dev)->mode_config.panic_lock, flags)
 
#define drm_panic_lock(dev, flags) \
    raw_spin_lock_irqsave(&(dev)->mode_config.panic_lock, flags)
 
#define drm_panic_unlock(dev, flags) \
    raw_spin_unlock_irqrestore(&(dev)->mode_config.panic_lock, flags)
 
#else
 
static inline bool drm_panic_trylock(struct drm_device *dev, unsigned long flags)
{
    return true;
}
 
static inline void drm_panic_lock(struct drm_device *dev, unsigned long flags) {}
static inline void drm_panic_unlock(struct drm_device *dev, unsigned long flags) {}
 
#endif
 
#if defined(CONFIG_DRM_PANIC_SCREEN_QR_CODE)
size_t drm_panic_qr_max_data_size(u8 version, size_t url_len);
 
u8 drm_panic_qr_generate(const char *url, u8 *data, size_t data_len, size_t data_size,
             u8 *tmp, size_t tmp_size);
#endif
 
#endif /* __DRM_PANIC_H__ */