[PATCH 0/9] implicit fencing clarification

[Daniel Vetter]

On Fri, Apr 06, 2018 at 10:38:38AM +0300, Oleksandr Andrushchenko wrote:
> Hi, Daniel!
> 
> It seems that this series misses xen-front's
> "Use simple_display_pipe prepare_fb helper" change?

Hm indeed, I guess I was on an older tree. Will follow up. Care to review
the other patches meanwhile?
-Daniel

> 
> Thank you,
> Oleksandr
> 
> On 04/05/2018 06:44 PM, Daniel Vetter wrote:
> > Hi all,
> > 
> > Somewhat motivated (but only really tangentially) by the dirtyfb
> > discussion with Rob and Thomas I started digging around in the various
> > driver implementations for implicit vs. explicit fencing.
> > 
> > There's definitely a huge pile of drivers which don't do any implicit
> > fencing at all - not sure that's good or not. And for some of the drivers
> > with more history I think they don't correctly overwrite implicit fencing
> > when explicit fencing is present. At least I've gotten lost in the mazes
> > before I found positive proof.
> > 
> > So this is just the lower hanging stuff, plus a doc patch to hopefully
> > clarify this all better.
> > 
> > Comments and review and especially in the case of the msm/vc4 patches,
> > also testing, very much welcome.
> > 
> > Thanks, Daniel
> > 
> > Daniel Vetter (9):
> >    drm/vmwgfx: Remove no-op prepare/cleanup_fb callbacks
> >    drm: Move simple_display_pipe prepare_fb helper into gem fb helpers
> >    drm/tve200: Use simple_display_pipe prepare_fb helper
> >    drm/pl111: Use simple_display_pipe prepare_fb helper
> >    drm/mxsfb: Use simple_display_pipe prepare_fb helper
> >    drm/atomic: better doc for implicit vs explicit fencing
> >    drm/gem-fb-helper: Always do implicit sync
> >    drm/vc4: Always obey implicit sync
> >    drm/msm: Always obey implicit fencing
> > 
> >   drivers/gpu/drm/drm_atomic.c                 |  8 +++++++
> >   drivers/gpu/drm/drm_gem_framebuffer_helper.c | 21 ++++++++++++++++-
> >   drivers/gpu/drm/msm/msm_atomic.c             |  2 +-
> >   drivers/gpu/drm/mxsfb/mxsfb_drv.c            |  8 +------
> >   drivers/gpu/drm/pl111/pl111_display.c        |  8 +------
> >   drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c  | 17 --------------
> >   drivers/gpu/drm/tinydrm/ili9225.c            |  2 +-
> >   drivers/gpu/drm/tinydrm/mi0283qt.c           |  3 ++-
> >   drivers/gpu/drm/tinydrm/repaper.c            |  2 +-
> >   drivers/gpu/drm/tinydrm/st7586.c             |  2 +-
> >   drivers/gpu/drm/tinydrm/st7735r.c            |  2 +-
> >   drivers/gpu/drm/tve200/tve200_display.c      |  8 +------
> >   drivers/gpu/drm/vc4/vc4_plane.c              | 11 +++++----
> >   drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c          | 35 ----------------------------
> >   include/drm/drm_gem_framebuffer_helper.h     |  3 +++
> >   include/drm/drm_modeset_helper_vtables.h     |  5 +++-
> >   include/drm/drm_plane.h                      |  7 +++++-
> >   include/drm/drm_simple_kms_helper.h          |  3 +++
> >   include/drm/tinydrm/tinydrm.h                |  2 --
> >   19 files changed, 61 insertions(+), 88 deletions(-)
> > 
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch