This patchset adds generic fbdev emulation for drivers that supports GEM based dumb buffers which support .gem_prime_vmap and gem_prime_mmap. An API is begun to support in-kernel clients in general.
The CMA helper drivers is moved as a whole over to this generic fbdev emulation. I've added patches 8 and 9 to show where it's heading. tinydrm will be the first driver to use the full emulation when it moves to vmalloc buffers. The CMA helper drivers will be converted one by one later.
This work is based on an idea[1] by Laurent Pinchart:
Ideally I'd like to remove 100% of fbdev-related code from drivers. This includes - initialization and cleanup of fbdev helpers - fbdev restore in last_close() - forwarding of hotplug events to fbdev compatibility layer
Noralf.
[1] https://lists.freedesktop.org/archives/dri-devel/2017-September/152612.html
David Herrmann (1): drm: provide management functions for drm_file
Noralf Trønnes (8): drm/file: Don't set master on in-kernel clients drm: Make ioctls available for in-kernel clients drm: Begin an API for in-kernel clients drm/fb-helper: Add generic fbdev emulation .fb_probe function drm/pl111: Set .gem_prime_vmap and .gem_prime_mmap drm/cma-helper: Use the generic fbdev emulation drm/client: Add client callbacks drm/fb-helper: Finish the generic fbdev emulation
Documentation/gpu/drm-client.rst | 12 + Documentation/gpu/index.rst | 1 + drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/drm_client.c | 511 ++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/drm_crtc_internal.h | 19 +- drivers/gpu/drm/drm_debugfs.c | 7 + drivers/gpu/drm/drm_drv.c | 9 + drivers/gpu/drm/drm_dumb_buffers.c | 33 ++- drivers/gpu/drm/drm_fb_cma_helper.c | 365 ++++---------------------- drivers/gpu/drm/drm_fb_helper.c | 287 ++++++++++++++++++++ drivers/gpu/drm/drm_file.c | 304 ++++++++++++--------- drivers/gpu/drm/drm_framebuffer.c | 42 +-- drivers/gpu/drm/drm_internal.h | 2 + drivers/gpu/drm/drm_ioctl.c | 4 +- drivers/gpu/drm/drm_probe_helper.c | 3 + drivers/gpu/drm/pl111/pl111_drv.c | 2 + include/drm/drm_client.h | 146 +++++++++++ include/drm/drm_device.h | 21 ++ include/drm/drm_fb_cma_helper.h | 3 - include/drm/drm_fb_helper.h | 33 +++ 20 files changed, 1322 insertions(+), 484 deletions(-) create mode 100644 Documentation/gpu/drm-client.rst create mode 100644 drivers/gpu/drm/drm_client.c create mode 100644 include/drm/drm_client.h