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drm/atomic: Reject attempts to use multiple rotation angles at once

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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.syrjala@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1474907460-10717-3-git-send-email-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2016-09-26 19:30:47 +03:00 committed by Daniel Vetter
parent bd2ef25d92
commit 6e0c7c3358
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/drm_atomic.c
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@ -706,6 +706,8 @@ 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;