drm/client: Restrict the rotation check to the rotation itself

The drm_client_rotation has a check on the rotation value, but the
reflections are also stored in the same variable, and the check doesn't
take this into account.

Therefore, even though we might have a valid rotation, if we're also using
a reflection parameter, the test will fail for no particular reason.

Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/cf4de0cdef20aac6c654b7b73c2ab3e317c46803.1560783090.git-series.maxime.ripard@bootlin.com

diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c
index 8264c3a..b4e5fb0 100644 (file)
--- a/drivers/gpu/drm/drm_client_modeset.c
+++ b/drivers/gpu/drm/drm_client_modeset.c
@@ -845,7 +845,8 @@ bool drm_client_panel_rotation(struct drm_mode_set *modeset, unsigned int *rotat
         * depending on the hardware this may require the framebuffer
         * to be in a specific tiling format.
         */
-       if (*rotation != DRM_MODE_ROTATE_180 || !plane->rotation_property)
+       if ((*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_180 ||
+           !plane->rotation_property)
                return false;
 
        for (i = 0; i < plane->rotation_property->num_values; i++)