[PATCH v2 0/1] drm/vkms: zpos

[José Expósito]

Hi all,

This patch adds support for the zpos plane prop in the VKMS driver.

It should be applied after the "drm/vkms: add support for multiple
overlay planes" series [1] because this new patch takes advantage of
the new constant "NUM_OVERLAY_PLANES" to set the maximum overlay
plane zpos.

Notice that, as explained in the commit message, there is one test
failling (plane-immutable-zpos) because of the timeout capturing CRC.

This is a known bug [2] that needs to be fixed in a different series.
It happens when the primary plane is disabled. The vkms_composer.c
vkms_composer_worker() function is not able to find the
"primary_composer" variable and the test fails.

As a quick fix, commenting the line:

  if (act_plane->base.base.plane->type == DRM_PLANE_TYPE_PRIMARY)

Fixes the issue. However, more work is required to properly clear the
background and blend the first active plane. I'll look into it,
feedback from someone that already investigated the issue is welcome :)

Thanks in advance,
José Expósito

[1] https://lore.kernel.org/dri-devel/20211226104059.11265-1-jose.exposito89@xxxxxxxxx/T/
[2] https://www.kernel.org/doc/html/latest/gpu/vkms.html#igt-better-support

José Expósito (1):
  drm/vkms: add zpos plane property

 drivers/gpu/drm/vkms/vkms_crtc.c  |  3 +--
 drivers/gpu/drm/vkms/vkms_drv.c   |  1 +
 drivers/gpu/drm/vkms/vkms_plane.c | 23 +++++++++++++++++++++++
 3 files changed, 25 insertions(+), 2 deletions(-)

-- 
2.25.1