From: kalakodima venkata rajesh <venkatarajesh.kalakod...@in.bosch.com>

Update gamma and ctm properties if there is a change.

Signed-off-by: Harsha M M <harsha.manjulamallikar...@in.bosch.com>

   - Fix compilation issues when for_each_crtc_in_state is not defined
   - Resolved checkpatch errors
   - Resolved merge conflicts according to latest version

Signed-off-by: kalakodima venkata rajesh <venkatarajesh.kalakod...@in.bosch.com>
---
 drivers/gpu/drm/rcar-du/rcar_du_kms.c | 25 +++++++++++++++++++++++++
 include/drm/drm_atomic.h              | 25 +++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c 
b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index f0bc7cc..4d9a19c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -246,6 +246,10 @@ static int rcar_du_atomic_check(struct drm_device *dev,
 static void rcar_du_atomic_commit_tail(struct drm_atomic_state *old_state)
 {
        struct drm_device *dev = old_state->dev;
+       struct drm_crtc *crtc;
+       struct drm_crtc_state *crtc_state;
+       struct rcar_du_crtc *rcrtc;
+       int i;
 
        /* Apply the atomic update. */
        drm_atomic_helper_commit_modeset_disables(dev, old_state);
@@ -253,6 +257,27 @@ static void rcar_du_atomic_commit_tail(struct 
drm_atomic_state *old_state)
                                        DRM_PLANE_COMMIT_ACTIVE_ONLY);
        drm_atomic_helper_commit_modeset_enables(dev, old_state);
 
+       /* Update gamma and ctm properties for all crtc in present
+        * state. Update is done only if there is a change
+        */
+       for_each_crtc_in_state(old_state, crtc, crtc_state, i) {
+               rcrtc = to_rcar_crtc(crtc);
+
+               if (rcrtc->lut_handle) {
+                       rcar_du_cmm_update_lut_and_free
+                         (rcrtc->lut_handle,
+                          (struct drm_color_lut *)crtc->state->gamma_lut->data,
+                          (crtc->state->gamma_lut->length /
+                          sizeof(struct drm_color_lut)));
+                       rcrtc->lut_handle = NULL;
+               }
+               if (rcrtc->clu_handle) {
+                       rcar_du_cmm_update_clu_and_free
+                         (rcrtc->clu_handle,
+                          (struct drm_color_ctm *)crtc->state->ctm->data);
+                       rcrtc->clu_handle = NULL;
+               }
+       }
        drm_atomic_helper_commit_hw_done(old_state);
        drm_atomic_helper_wait_for_flip_done(dev, old_state);
 
diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 1e71315..d22ccd8 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -693,6 +693,31 @@ void drm_state_dump(struct drm_device *dev, struct 
drm_printer *p);
                             (new_connector_state) = 
(__state)->connectors[__i].new_state, 1))
 
 /**
+ * for_each_crtc_in_state - iterate over all connectors in an atomic update
+ * @__state: &struct drm_atomic_state pointer
+ * @crtc: &struct drm_crtc iteration cursor
+ * @crtc_state: &struct drm_crtc_state iteration cursor
+ * @__i: int iteration cursor, for macro-internal use
+ *
+ * This iterates over all CRTCs in an atomic update. Note that before the
+ * software state is committed (by calling drm_atomic_helper_swap_state(), this
+ * points to the new state, while afterwards it points to the old state. Due to
+ * this tricky confusion this macro is deprecated.
+ *
+ * FIXME:
+ *
+ * Replace all usage of this with one of the explicit iterators below and then
+ * remove this macro.
+ */
+#define for_each_crtc_in_state(__state, crtc, crtc_state, __i) \
+       for ((__i) = 0;                                         \
+            ((__i) < ((__state)->dev->mode_config.num_crtc)) &&        \
+            ((crtc) = ((__state)->crtcs[__i].ptr),                     \
+            (crtc_state) = ((__state)->crtcs[__i].state), 1);  \
+            (__i)++)                                           \
+               for_each_if(crtc_state)
+
+/**
  * for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update
  * @__state: &struct drm_atomic_state pointer
  * @crtc: &struct drm_crtc iteration cursor
-- 
2.7.4

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