When proposing to enable DRM_PANIC on Fedora, some users raised concern about the need to disable VT_CONSOLE. So this is my new attempt to avoid fbcon/vt_console to overwrite the panic screen. This time it doesn't involve any locking, so it should be safe. I added a skip_panic option in struct fb_info, and check if this option and the panic_cpu are set in fb_is_inactive(), to prevent any framebuffer operation. Also skip_panic is only true if the drm driver supports drm_panic, so you will still get the VT panic info on drivers that don't have drm_panic support yet.
Jocelyn Falempe (3): drm/panic: Add drm_panic_is_enabled() fbcon: Add an option to disable fbcon in panic. drm/panic: Remove build time dependency with FRAMEBUFFER_CONSOLE drivers/gpu/drm/Kconfig | 2 +- drivers/gpu/drm/drm_fb_helper.c | 2 ++ drivers/gpu/drm/drm_panic.c | 20 ++++++++++++++++++++ drivers/video/fbdev/core/fbcon.c | 7 ++++++- include/drm/drm_panic.h | 2 ++ include/linux/fb.h | 1 + 6 files changed, 32 insertions(+), 2 deletions(-) base-commit: a237f217bad50c381773da5b00442710d1449098 -- 2.45.2
