The check to reject combinations of multiple rotation angles is overly
restrictive and has the side-effect of also failing any rotation value
which consists only of reflections.
Fix this by relaxing the check to ignore values which contain no
rotation flags.
Fixes: 6e0c7c3358d4 ("drm/atomic: Reject attempts to use multiple rotation
angles at once")
Signed-off-by: Brian Starkey <brian.starkey at arm.com>
---
drivers/gpu/drm/drm_atomic.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 362e3ea..44f4030 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -846,7 +846,8 @@ int drm_atomic_plane_set_property(struct drm_plane *plane,
} else if (property == config->prop_src_h) {
state->src_h = val;
} else if (property == plane->rotation_property) {
- if (!is_power_of_2(val & DRM_ROTATE_MASK))
+ if ((val & DRM_ROTATE_MASK) &&
+ !is_power_of_2(val & DRM_ROTATE_MASK))
return -EINVAL;
state->rotation = val;
} else if (property == plane->zpos_property) {
--
1.7.9.5
