(cc: Gerd)

Am 28.10.19 um 09:45 schrieb Thomas Zimmermann:
> Udl's GEM implementation is mostly SHMEM and we should attempt to
> replace it with the latter.
> 
> Patches #1 and #2 update udl to simplify the conversion. In patch #3
> the udl code is being replaced by SHMEM. The GEM object's mmap() and
> free_object() functions are wrappers around their SHMEM counterparts.
> For mmap() we fix-up the page-caching flags to distinguish between
> write-combined and cached access. For free(), we have to unmap the
> buffer's mapping that has been established by udl's fbdev code.
> 
> The patchset has been tested by running the fbdev console, X11 and
> Weston on a DisplayLink adapter.
> 
> Thomas Zimmermann (3):
>   drm/udl: Remove flags field from struct udl_gem_object
>   drm/udl: Allocate GEM object via struct drm_driver.gem_create_object
>   drm/udl: Switch to SHMEM
> 
>  drivers/gpu/drm/udl/Kconfig      |   1 +
>  drivers/gpu/drm/udl/Makefile     |   2 +-
>  drivers/gpu/drm/udl/udl_dmabuf.c | 255 -------------------------------
>  drivers/gpu/drm/udl/udl_drv.c    |  30 +---
>  drivers/gpu/drm/udl/udl_drv.h    |  36 +----
>  drivers/gpu/drm/udl/udl_fb.c     |  65 ++++----
>  drivers/gpu/drm/udl/udl_gem.c    | 245 ++++++-----------------------
>  7 files changed, 93 insertions(+), 541 deletions(-)
>  delete mode 100644 drivers/gpu/drm/udl/udl_dmabuf.c
> 
> --
> 2.23.0
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer