As ffs() returns one more than the index of the first bit set (zero means no bits set), the color key mode value is shifted one position too much.

Fix this by using FIELD_GET() instead.

Fixes: c96103b6c49ff9a8 ("drm/armada: move colorkey properties into overlay plane state") Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be --- Compile-tested only. --- drivers/gpu/drm/armada/armada_overlay.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/armada/armada_overlay.c b/drivers/gpu/drm/armada/armada_overlay.c index 424250535fed9e87..0383deb970bbbb03 100644 --- a/drivers/gpu/drm/armada/armada_overlay.c +++ b/drivers/gpu/drm/armada/armada_overlay.c @@ -4,6 +4,8 @@ * Rewritten from the dovefb driver, and Armada510 manuals. */

+#include <linux/bitfield.h> + #include <drm/armada_drm.h> #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> @@ -451,8 +453,8 @@ static int armada_overlay_get_property(struct drm_plane *plane, drm_to_overlay_state(state)->colorkey_ug, drm_to_overlay_state(state)->colorkey_vb, 0); } else if (property == priv->colorkey_mode_prop) { - *val = (drm_to_overlay_state(state)->colorkey_mode & - CFG_CKMODE_MASK) >> ffs(CFG_CKMODE_MASK); + *val = FIELD_GET(CFG_CKMODE_MASK, + drm_to_overlay_state(state)->colorkey_mode); } else if (property == priv->brightness_prop) { *val = drm_to_overlay_state(state)->brightness + 256; } else if (property == priv->contrast_prop) {