This patchset adds fbdev deferred io support to drm_fb_helper and drm_fb_cma_helper.
It defers fbdev mmap and fb_{write,fillrect,copyarea,imageblit} damage and channels it through the (struct drm_framebuffer_funcs)->dirty callback on the fb_helper framebuffer which will always run in process context.
I have also added patches that converts qxl and udl to use this deferred io support. I have only compile tested it, no functional testing. I know that qxl is purely a software thing so I could actually test it, but I have never used qemu so I'm not keen on spending a lot of time on that.
This was originally part of the tinydrm patchset.
Changes since RFC: - Fix drm_clip_rect use to be exclusive on x2/y2 - Put drm_clip_rect functions in drm_rect.{h,c} - Take into account that (struct fb_ops *)->fb_{write,...}() can be called from atomic context (spin_lock_irqsave) - Export fb_deferred_io_mmap() - Add some more documentation - Add qxl and udl patches
Noralf Trønnes (8): drm/rect: Add some drm_clip_rect utility functions drm/udl: Change drm_fb_helper_sys_*() calls to sys_*() drm/qxl: Change drm_fb_helper_sys_*() calls to sys_*() drm/fb-helper: Add fb_deferred_io support fbdev: fb_defio: Export fb_deferred_io_mmap drm/fb-cma-helper: Add fb_deferred_io support drm/qxl: Use drm_fb_helper deferred_io support drm/udl: Use drm_fb_helper deferred_io support
drivers/gpu/drm/drm_fb_cma_helper.c | 190 +++++++++++++++++++++++++++++-- drivers/gpu/drm/drm_fb_helper.c | 119 ++++++++++++++++++- drivers/gpu/drm/drm_rect.c | 67 +++++++++++ drivers/gpu/drm/qxl/qxl_display.c | 9 +- drivers/gpu/drm/qxl/qxl_drv.h | 7 +- drivers/gpu/drm/qxl/qxl_fb.c | 220 +++++++++--------------------------- drivers/gpu/drm/qxl/qxl_kms.c | 4 - drivers/gpu/drm/udl/udl_drv.h | 2 - drivers/gpu/drm/udl/udl_fb.c | 152 ++----------------------- drivers/video/fbdev/core/fb_defio.c | 3 +- include/drm/drm_fb_cma_helper.h | 14 +++ include/drm/drm_fb_helper.h | 15 +++ include/drm/drm_rect.h | 69 +++++++++++ include/linux/fb.h | 1 + 14 files changed, 538 insertions(+), 334 deletions(-)
-- 2.2.2