From: Ville Syrjälä <ville.syrj...@linux.intel.com>
The rotation property should only accept exactly one rotation angle
at once. Let's reject attempts to set none or multiple angles.
Testcase: igt/kms_rotation_crc/bad-rotation
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/drm_atomic.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 23739609427d..58b90c247153 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -710,6 +710,8 @@ int drm_atomic_plane_set_property(struct drm_plane *plane,
} else if (property == config->prop_src_h) {
state->src_h = val;
} else if (property == config->rotation_property) {
+ if (!is_power_of_2(val & DRM_ROTATE_MASK))
+ return -EINVAL;
state->rotation = val;
} else if (property == plane->zpos_property) {
state->zpos = val;
--
2.7.4
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