[PATCH v2 1/2] drm/vkms: remove the need for the primary plane to be visible

[Maíra Canal]

Before commit bc0d7fdefec6 ("drm: vkms: Supports to the case where
primary plane doesn't match the CRTC"), the composition was executed on
top of the primary plane. Therefore, the primary plane needed to be
visible and full screen. After commit bc0d7fdefec6, this is no longer
necessary, as the composition is now executed on top of the CRTC.

Then, remove the conditional expression that forced the primary plane to
be visible and full screen. This allows vkms to accept non-null
framebuffers when the CRTC is disabled.

This patch was tested with the vkms IGT testlist and all tests passed
successfully. Moreover, the tests
igt at kms_universal_plane@universal-plane-pipe-a-functional and
igt at kms_universal_plane@disable-primary-vs-flip-pipe-a used to fail and
now are passing.

Signed-off-by: Maíra Canal <mcanal at igalia.com>
---
 drivers/gpu/drm/vkms/vkms_plane.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index b3f8a115cc23..458d16865c97 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -153,10 +153,6 @@ static int vkms_plane_atomic_check(struct drm_plane *plane,
 	if (ret != 0)
 		return ret;
 
-	/* for now primary plane must be visible and full screen */
-	if (!new_plane_state->visible && !can_position)
-		return -EINVAL;
-
 	return 0;
 }
 
-- 
2.39.2