From 6e0c7c3358d4e8e9917a97348e6f77da88226cbe Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 26 Sep 2016 19:30:47 +0300 Subject: [PATCH] drm/atomic: Reject attempts to use multiple rotation angles at once MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Joonas Lahtinen Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1474907460-10717-3-git-send-email-ville.syrjala@linux.intel.com --- 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 5dd70540219c..13ce95ee458e 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -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; -- 2.20.1