Add a kmsg option, which will display the last lines of kmsg, and should be similar to fbcon. Add a drm.panic_screen module parameter, so you can choose between the different panic screens available. Two options currently, but more will be added later: * "user": a short message telling the user to reboot the machine. * "kmsg": fill the screen with the last lines of kmsg. You can even change it at runtime by writing to /sys/module/drm/parameters/panic_screen Patch 1-2 are the same as https://patchwork.freedesktop.org/series/133963/ and are here to avoid conflicts. v2: * use module parameter instead of Kconfig choice, so it can be changed at runtime. (Javier Martinez Canillas) * keep fg16/fg24/fg32 as variable name for the blit functions (Javier Martinez Canillas) * Add drm_panic_is_pixel_fg() to avoid code duplication. (Javier Martinez Canillas) Jocelyn Falempe (3): drm/panic: only draw the foreground color in drm_panic_blit() drm/panic: Add a set_pixel() callback to drm_scanout_buffer drm/panic: Add a kmsg panic screen drivers/gpu/drm/Kconfig | 11 ++ drivers/gpu/drm/drm_panic.c | 283 +++++++++++++++++++++++++----------- include/drm/drm_panic.h | 9 ++ 3 files changed, 219 insertions(+), 84 deletions(-) base-commit: 86266829ea755f737762ebda614c59b136c8feac -- 2.45.1
