This patchset adds a way for DRM drivers to display kernel messages during panic().
This version have lots of changes based on Daniel's review of the RFC where he proposed a different way of interacting with the driver.
I have used this script to run some tests on the rendering code: https://gist.github.com/notro/4f42ec20e1be1d47c98fa749ca53c805
Noralf.
Noralf Trønnes (3): drm: Add support for panic message output drm/fb_cma_helper: Add panic handling drm/simpledrm: Add panic handling
drivers/gpu/drm/Kconfig | 1 + drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/drm_drv.c | 3 + drivers/gpu/drm/drm_fb_cma_helper.c | 10 + drivers/gpu/drm/drm_framebuffer.c | 108 +++++ drivers/gpu/drm/drm_internal.h | 4 + drivers/gpu/drm/drm_panic.c | 640 ++++++++++++++++++++++++++++++ drivers/gpu/drm/simpledrm/simpledrm_kms.c | 11 + include/drm/drm_framebuffer.h | 40 ++ 9 files changed, 818 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/drm_panic.c
-- 2.8.2