On Wed, Jul 22, 2020 at 8:13 PM Alex Bee [off-list ref] wrote:

Hi,

this series mainly ports existining functionality to older SoCs - most
importantly enables alpha blending for RK3036, RK3066, RK3126 and
RK3188.
Besides that, it also changes the window type from DRM_PLANE_TYPE_CURSOR
to DRM_PLANE_TYPE_OVERLAY for VOPs that have only one (1) overlay window.

This doesn't make much sense, the cursor overlay is really just a hint
for legacy ioctls that this is the overlay that should be used for
cursors. Compositors should try to use such planes as full overlays
(if they don't want to use them as a cursor). So sounds like a case of
"fix your compositor".

For atomic there's 0 difference between a overlay or a cursor (primary
plane is still treated somewhat special in the RMFB ioctl, but again
that's for backwards compat reasons with existing uapi, not because
the primary plane is different).

What does happen though is that this breaks cursor for legacy
userspace, which is probably not really what you want.
-Daniel

Regards,
Alex

Changes in v2:
- drop not yet upstreamed dsp_data_swap from RK3188 regs
- rephrase most commit messages

Alex Bee (5):
  drm: rockchip: add scaling for RK3036 win1
  drm: rockchip: add missing registers for RK3188
  drm: rockchip: add alpha support for RK3036, RK3066, RK3126 and RK3188
  drm: rockchip: set alpha_en to 0 if it is not used
  drm: rockchip: use overlay windows as such

 drivers/gpu/drm/rockchip/rockchip_drm_vop.c |  1 +
 drivers/gpu/drm/rockchip/rockchip_vop_reg.c | 42 ++++++++++++++++++---
 drivers/gpu/drm/rockchip/rockchip_vop_reg.h |  1 +
 3 files changed, 38 insertions(+), 6 deletions(-)

--
2.17.1

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

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