[RFC 8/9] drm: rcar-du: kms: Configure the CLU

[Jacopo Mondi]

From: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>

Link the DRM 3D-CLU configuration to the CMM setup configuration.

Signed-off-by: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mo...@ideasonboard.com>
---
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c 
b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index a2d477dc5a51..895a23161f7b 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -521,19 +521,23 @@ static int rcar_du_cmm_check(struct drm_crtc *crtc,
                             struct drm_crtc_state *state)
 {
        struct drm_property_blob *drm_lut = state->gamma_lut;
+       struct drm_property_blob *drm_clu = state->lut3d;
        struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
        struct device *dev = rcrtc->dev->dev;
 
-       if (!drm_lut)
-               return 0;
-
-       /* We only accept fully populated LUT tables. */
-       if (drm_color_lut_size(drm_lut) != CM2_LUT_SIZE) {
+       /* We only accept fully populated LUTs. */
+       if (drm_lut && drm_color_lut_size(drm_lut) != CM2_LUT_SIZE) {
                dev_err(dev, "invalid gamma lut size: %zu bytes\n",
                        drm_lut->length);
                return -EINVAL;
        }
 
+       if (drm_clu && drm_color_lut_size(drm_clu) != CM2_CLU_SIZE) {
+               dev_err(dev, "invalid cubic lut size: %zu bytes\n",
+                       drm_clu->length);
+               return -EINVAL;
+       }
+
        return 0;
 }
 
@@ -555,6 +559,15 @@ static void rcar_du_cmm_setup(struct rcar_du_crtc *rcrtc,
                                     ? new_state->gamma_lut->data : NULL;
        }
 
+       if (!old_state ||
+           !old_state->lut3d != !new_state->lut3d ||
+           (old_state->lut3d && new_state->lut3d &&
+            old_state->lut3d->base.id != new_state->lut3d->base.id)) {
+               cmm_config.clu.update = true;
+               cmm_config.clu.table = new_state->lut3d
+                                    ? new_state->lut3d->data : NULL;
+       }
+
        rcar_cmm_setup(rcrtc->cmm, &cmm_config);
 }
 
-- 
2.40.1