diff options
| -rw-r--r-- | linux-core/intel_fb.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/linux-core/intel_fb.c b/linux-core/intel_fb.c index d53b22ff..b082080c 100644 --- a/linux-core/intel_fb.c +++ b/linux-core/intel_fb.c @@ -581,6 +581,22 @@ int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc) } EXPORT_SYMBOL(intelfb_resize); +static struct drm_mode_set panic_mode; + +int intelfb_panic(struct notifier_block *n, unsigned long ununsed, + void *panic_str) +{ + DRM_ERROR("panic occurred, switching back to text console\n"); + drm_crtc_helper_set_config(&panic_mode); + + return 0; +} +EXPORT_SYMBOL(intelfb_panic); + +static struct notifier_block paniced = { + .notifier_call = intelfb_panic, +}; + int intelfb_create(struct drm_device *dev, uint32_t fb_width, uint32_t fb_height, uint32_t surface_width, uint32_t surface_height, struct intel_framebuffer **intel_fb_p) @@ -844,6 +860,12 @@ static int intelfb_multi_fb_probe_crtc(struct drm_device *dev, struct drm_crtc * printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id); + + /* Switch back to kernel console on panic */ + panic_mode = *modeset; + atomic_notifier_chain_register(&panic_notifier_list, &paniced); + printk(KERN_INFO "registered panic notifier\n"); + return 0; } @@ -965,6 +987,12 @@ static int intelfb_single_fb_probe(struct drm_device *dev) printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node, info->fix.id); + + /* Switch back to kernel console on panic */ + panic_mode = *modeset; + atomic_notifier_chain_register(&panic_notifier_list, &paniced); + printk(KERN_INFO "registered panic notifier\n"); + return 0; } @@ -1020,6 +1048,9 @@ int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb) mutex_unlock(&dev->struct_mutex); framebuffer_release(info); } + + atomic_notifier_chain_unregister(&panic_notifier_list, &paniced); + memset(&panic_mode, 0, sizeof(struct drm_mode_set)); return 0; } EXPORT_SYMBOL(intelfb_remove); |