[DPU PATCH v3 4/7] drm/msm/dpu: switch to drm zpos property

[Jeykumar Sankaran]

Replace custom plane zpos property with drm core zpos
property. CRTC relies on the normalized zpos values
to configure blend stages of each plane.

changes in v2:
	- Move out unrelated changes in plane init (Sean Paul)
changes in v3:
    - rebased on https://gitlab.freedesktop.org/seanpaul/
      dpu-staging/commit/481d29d31cd629fd216381b53de5695f645465d5

Signed-off-by: Jeykumar Sankaran <jsanka at codeaurora.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c  | 36 +------------------------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 16 +++++++++++---
 2 files changed, 14 insertions(+), 38 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 7cf5a7a..a7d9aff 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -2583,24 +2583,6 @@ struct plane_state {
 	u32 pipe_id;
 };
 
-static int pstate_cmp(const void *a, const void *b)
-{
-	struct plane_state *pa = (struct plane_state *)a;
-	struct plane_state *pb = (struct plane_state *)b;
-	int rc = 0;
-	int pa_zpos, pb_zpos;
-
-	pa_zpos = dpu_plane_get_property(pa->dpu_pstate, PLANE_PROP_ZPOS);
-	pb_zpos = dpu_plane_get_property(pb->dpu_pstate, PLANE_PROP_ZPOS);
-
-	if (pa_zpos != pb_zpos)
-		rc = pa_zpos - pb_zpos;
-	else
-		rc = pa->drm_pstate->crtc_x - pb->drm_pstate->crtc_x;
-
-	return rc;
-}
-
 static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 		struct drm_crtc_state *state)
 {
@@ -2666,8 +2648,7 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 
 		pstates[cnt].dpu_pstate = to_dpu_plane_state(pstate);
 		pstates[cnt].drm_pstate = pstate;
-		pstates[cnt].stage = dpu_plane_get_property(
-				pstates[cnt].dpu_pstate, PLANE_PROP_ZPOS);
+		pstates[cnt].stage = pstate->normalized_zpos;
 		pstates[cnt].pipe_id = dpu_plane_pipe(plane);
 
 		/* check dim layer stage with every plane */
@@ -2723,21 +2704,6 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 		}
 	}
 
-	/* assign mixer stages based on sorted zpos property */
-	sort(pstates, cnt, sizeof(pstates[0]), pstate_cmp, NULL);
-
-	if (!dpu_is_custom_client()) {
-		int stage_old = pstates[0].stage;
-
-		z_pos = 0;
-		for (i = 0; i < cnt; i++) {
-			if (stage_old != pstates[i].stage)
-				++z_pos;
-			stage_old = pstates[i].stage;
-			pstates[i].stage = z_pos;
-		}
-	}
-
 	z_pos = -1;
 	for (i = 0; i < cnt; i++) {
 		/* reset counts at every new blend stage */
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index e81cb1f..c6be158 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -59,6 +59,7 @@
 #define DPU_NAME_SIZE  12
 
 #define DPU_PLANE_COLOR_FILL_FLAG	BIT(31)
+#define DPU_ZPOS_MAX 255
 
 /* multirect rect index */
 enum {
@@ -1516,9 +1517,6 @@ static void _dpu_plane_install_properties(struct drm_plane *plane,
 		/* reserve zpos == 0 for primary planes */
 		zpos_def = drm_plane_index(plane) + 1;
 	}
-
-	msm_property_install_range(&pdpu->property_info, "zpos",
-		0x0, 0, zpos_max, zpos_def, PLANE_PROP_ZPOS);
 }
 
 static int dpu_plane_atomic_set_property(struct drm_plane *plane,
@@ -1956,6 +1954,7 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
 	struct msm_drm_private *priv;
 	struct dpu_kms *kms;
 	enum drm_plane_type type;
+	int zpos_max = DPU_ZPOS_MAX;
 	int ret = -EINVAL;
 
 	if (!dev) {
@@ -2049,6 +2048,17 @@ struct drm_plane *dpu_plane_init(struct drm_device *dev,
 
 	pdpu->catalog = kms->catalog;
 
+	if (kms->catalog->mixer_count &&
+		kms->catalog->mixer[0].sblk->maxblendstages) {
+		zpos_max = kms->catalog->mixer[0].sblk->maxblendstages - 1;
+		if (zpos_max > DPU_STAGE_MAX - DPU_STAGE_0 - 1)
+			zpos_max = DPU_STAGE_MAX - DPU_STAGE_0 - 1;
+	}
+
+	ret = drm_plane_create_zpos_property(plane, 0, 0, zpos_max);
+	if (ret)
+		DPU_ERROR("failed to install zpos property, rc = %d\n", ret);
+
 	/* success! finalize initialization */
 	drm_plane_helper_add(plane, &dpu_plane_helper_funcs);
 
-- 
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