[PATCH 6/8] drm: rcar-du: Implement atomic_check to check for gamma and ctm properties

[VenkataRajesh.Kalakodima]

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

    Implement atomic helper check and allocate memory necessary for
    lut and clu tables

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

      - 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_crtc.c | 58 ++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/rcar-du/rcar_du_crtc.h |  3 +-
 2 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c 
b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 864fb94..a00b7a7 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -622,6 +622,63 @@ static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc)
  * CRTC Functions
  */
 
+static bool rcar_du_crtc_is_ctm_updated(struct drm_crtc *crtc,
+                                       struct drm_crtc_state *state)
+{
+       return (state->color_mgmt_changed && state->ctm &&
+               crtc->state->ctm &&
+               (crtc->state->ctm->base.id != state->ctm->base.id));
+}
+
+static bool rcar_du_crtc_is_gamma_updated(struct drm_crtc *crtc,
+                                         struct drm_crtc_state *state)
+{
+       return (state->color_mgmt_changed && state->gamma_lut &&
+               crtc->state->gamma_lut &&
+               (crtc->state->gamma_lut->base.id != state->gamma_lut->base.id));
+}
+
+static int rcar_du_crtc_cmm_atomic_check(struct drm_crtc *crtc,
+                                        struct drm_crtc_state *state)
+{
+       int ret = 0;
+       struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+
+       /*Check gamma update and allocate memory*/
+       if (rcar_du_crtc_is_gamma_updated(crtc, state) &&
+           !rcrtc->lut_handle) {
+               ret = rcar_du_cmm_lut_valid((crtc->state->gamma_lut->length /
+                                            sizeof(struct drm_color_lut)));
+               if (ret >= 0) {
+                       rcrtc->lut_handle =
+                               rcar_du_cmm_alloc_lut(rcrtc->cmm_handle);
+                       if (!rcrtc->lut_handle)
+                               ret = -ENOMEM;
+               }
+       }
+
+       /*Check update of ctm and allocate memory*/
+       if (ret >= 0 && rcar_du_crtc_is_ctm_updated(crtc, state) &&
+           !rcrtc->clu_handle) {
+               rcrtc->clu_handle = rcar_du_cmm_alloc_clu(rcrtc->cmm_handle);
+               if (!rcrtc->clu_handle) {
+                       if (!rcrtc->lut_handle) {
+                               rcar_du_cmm_free_lut(rcrtc->lut_handle);
+                               rcrtc->lut_handle = NULL;
+                       }
+                       ret = -ENOMEM;
+               }
+       }
+
+       return ret;
+}
+
+static int rcar_du_crtc_atomic_check(struct drm_crtc *crtc,
+                                    struct drm_crtc_state *state)
+{
+       return rcar_du_crtc_cmm_atomic_check(crtc, state);
+}
+
 static void rcar_du_crtc_atomic_enable(struct drm_crtc *crtc,
                                       struct drm_crtc_state *old_state)
 {
@@ -708,6 +765,7 @@ static const struct drm_crtc_helper_funcs crtc_helper_funcs 
= {
        .atomic_flush = rcar_du_crtc_atomic_flush,
        .atomic_enable = rcar_du_crtc_atomic_enable,
        .atomic_disable = rcar_du_crtc_atomic_disable,
+       .atomic_check = rcar_du_crtc_atomic_check,
 };
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h 
b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index 5b85de4..b79080e 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -70,7 +70,8 @@ struct rcar_du_crtc {
        int lvds_ch;
 
        void *cmm_handle;
-
+       void *lut_handle;
+       void *clu_handle;
 };
 
 #define to_rcar_crtc(c)        container_of(c, struct rcar_du_crtc, crtc)
-- 
2.7.4

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel