[PATCH 0/8] drm: Add fbdev deferred io support to helpers

Noralf Trønnes
2016-04-20T15:25:21Z

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 TrÃ¸nnes (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(-)

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2.2.2