DRM drivers using drm_fb_helpers still call some fbdev core functions. This makes the driver depend on CONFIG_FB, resulting in complicated Kconfig options, and preventing us from creating a top level drm config option to enable/disable FBDEV emulation.
Create new drm_fb_helper functions that replace these fbdev functions.
In most cases, the new helper funcs simply wrap around the original fbdev functions. For a few (like framebufer_alloc), we actually do some work that is currently redundant across multiple drivers.
With these patches, the drivers don't call any fbdev functions directly. They are now called through functions in drm_fb_helper.c. We will later create a fbdev emulation config option to stub out the fb helpers.
The only exception is vmwgfx driver. This doesn't use drm_fb_helper. It creates a fb device how a driver in drivers/video/fbdev would. Maybe this needs to be converted to use drm_fb_helpers.
For more info, have a look at the threads: http://lists.freedesktop.org/archives/dri-devel/2015-March/078729.html http://lists.freedesktop.org/archives/dri-devel/2015-March/078975.html
changes in v3: - Removed drm_fb_helper for remove_conflicting_framebuffers. - Fixed kerneldoc header errors - Some fixes pointed out on the mailing list
changes in v2: - Incorporated comments - Misc fixes for build wannings/errors - resend version has v2 changes in changelog, 'compile tested only' is removed.
Archit Taneja (24): drm/fb_helper: Add drm_fb_helper functions to manage fb_info creation drm/fb_helper: Create a wrapper for unlink_framebuffer drm/fb_helper: Create wrappers for fb_sys_read/write funcs drm/fb_helper: Create wrappers for blit, copyarea and fillrect funcs drm/fb_helper: Create a wrapper for fb_set_suspend drm/cirrus: Use new drm_fb_helper functions drm/rockchip: Use new drm_fb_helper functions drm/armada: Use new drm_fb_helper functions drm/ast: Use new drm_fb_helper functions drm/omap: Use new drm_fb_helper functions drm/tegra: Use new drm_fb_helper functions drm/msm: Use new drm_fb_helper functions drm/exynos: Use new drm_fb_helper functions drm/gma500: Use new drm_fb_helper functions drm/mgag200: Use new drm_fb_helper functions drm/radeon: Use new drm_fb_helper functions drm/qxl: Use new drm_fb_helper functions drm/i915: Use new drm_fb_helper functions drm/nouveau: Use new drm_fb_helper functions drm/udl: Use new drm_fb_helper functions drm/bochs: Use new drm_fb_helper functions drm/amdgpu: Use new drm_fb_helper functions drm/virtio: Use new drm_fb_helper functions drm/fb_cma_helper: Use new drm_fb_helper functions
drivers/gpu/drm/Kconfig | 7 + drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c | 45 ++---- drivers/gpu/drm/armada/armada_fbdev.c | 33 ++-- drivers/gpu/drm/ast/ast_fb.c | 48 ++---- drivers/gpu/drm/bochs/bochs_drv.c | 4 +- drivers/gpu/drm/bochs/bochs_fbdev.c | 36 ++--- drivers/gpu/drm/cirrus/cirrus_drv.c | 4 +- drivers/gpu/drm/cirrus/cirrus_fbdev.c | 41 +---- drivers/gpu/drm/drm_fb_cma_helper.c | 45 ++---- drivers/gpu/drm/drm_fb_helper.c | 223 ++++++++++++++++++++++++++ drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 47 ++---- drivers/gpu/drm/gma500/accel_2d.c | 6 +- drivers/gpu/drm/gma500/framebuffer.c | 48 ++---- drivers/gpu/drm/i915/intel_fbdev.c | 40 ++--- drivers/gpu/drm/mgag200/mgag200_fb.c | 39 +---- drivers/gpu/drm/msm/msm_fbdev.c | 34 ++-- drivers/gpu/drm/nouveau/nouveau_fbcon.c | 39 ++--- drivers/gpu/drm/omapdrm/omap_fbdev.c | 38 ++--- drivers/gpu/drm/qxl/qxl_fb.c | 40 ++--- drivers/gpu/drm/radeon/radeon_fb.c | 42 ++--- drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c | 47 ++---- drivers/gpu/drm/tegra/fb.c | 35 ++-- drivers/gpu/drm/udl/udl_fb.c | 41 ++--- drivers/gpu/drm/virtio/virtgpu_fb.c | 32 ++-- include/drm/drm_fb_helper.h | 27 ++++ 25 files changed, 485 insertions(+), 556 deletions(-)