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

[Jacopo Mondi]

From: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>

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

Signed-off-by: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi at 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