[PATCH 3/9] drm/imx: ipuv3-plane: request modeset if plane offsets changed

[Philipp Zabel]

If the framebuffer pixel format is planar YUV and unchanged, but the U
or V plane offsets change, do not return an error, but request a modeset
instead.

Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 drivers/gpu/drm/imx/ipuv3-plane.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/imx/ipuv3-plane.c 
b/drivers/gpu/drm/imx/ipuv3-plane.c
index d4a771c..f217444 100644
--- a/drivers/gpu/drm/imx/ipuv3-plane.c
+++ b/drivers/gpu/drm/imx/ipuv3-plane.c
@@ -356,13 +356,11 @@ static int ipu_plane_atomic_check(struct drm_plane *plane,
                if ((ubo > 0xfffff8) || (vbo > 0xfffff8))
                        return -EINVAL;

-               if (old_fb &&
-                   (old_fb->pixel_format == DRM_FORMAT_YUV420 ||
-                    old_fb->pixel_format == DRM_FORMAT_YVU420)) {
+               if (old_fb && (fb->pixel_format == old_fb->pixel_format)) {
                        old_ubo = drm_plane_state_to_ubo(old_state);
                        old_vbo = drm_plane_state_to_vbo(old_state);
                        if (ubo != old_ubo || vbo != old_vbo)
-                               return -EINVAL;
+                               crtc_state->mode_changed = true;
                }

                if (fb->pitches[1] != fb->pitches[2])
-- 
2.9.3