diff --git a/msm/sde/sde_crtc.c b/msm/sde/sde_crtc.c
index 01fc75b88e..f3dd5632f0 100644
--- a/msm/sde/sde_crtc.c
+++ b/msm/sde/sde_crtc.c
@@ -641,8 +641,9 @@ static void _sde_crtc_setup_blend_cfg(struct sde_crtc_mixer *mixer,
 		break;
 	}
 
-	lm->ops.setup_blend_config(lm, pstate->stage, fg_alpha,
-						bg_alpha, blend_op);
+	if (lm->ops.setup_blend_config)
+		lm->ops.setup_blend_config(lm, pstate->stage, fg_alpha, bg_alpha, blend_op);
+
 	SDE_DEBUG(
 		"format: %4.4s, alpha_enable %u fg alpha:0x%x bg alpha:0x%x blend_op:0x%x\n",
 		(char *) &format->base.pixel_format,
@@ -1284,7 +1285,8 @@ static void _sde_crtc_program_lm_output_roi(struct drm_crtc *crtc)
 			cfg.right_mixer = right_mixer;
 			cfg.flags = 0;
 
-			hw_lm->ops.setup_mixer_out(hw_lm, &cfg);
+			if (hw_lm->ops.setup_mixer_out)
+				hw_lm->ops.setup_mixer_out(hw_lm, &cfg);
 			lm_updated = true;
 		}
 
@@ -1828,7 +1830,8 @@ static void _sde_crtc_blend_setup(struct drm_crtc *crtc,
 		if (sde_kms_rect_is_null(lm_roi))
 			sde_crtc->mixers[i].mixer_op_mode = 0;
 
-		lm->ops.setup_alpha_out(lm, mixer[i].mixer_op_mode);
+		if (lm->ops.setup_alpha_out)
+			lm->ops.setup_alpha_out(lm, mixer[i].mixer_op_mode);
 
 		/* stage config flush mask */
 		ctl->ops.update_bitmask_mixer(ctl, mixer[i].hw_lm->idx, 1);
@@ -6463,24 +6466,22 @@ static ssize_t _sde_crtc_misr_read(struct file *file,
 
 		m = &sde_crtc->mixers[i];
 		if (!m->hw_lm || !m->hw_lm->ops.collect_misr) {
-			len += scnprintf(buf + len, MISR_BUFF_SIZE - len,
-					"invalid\n");
-			SDE_ERROR("crtc:%d invalid misr ops\n", DRMID(crtc));
+			if (!m->hw_lm || !m->hw_lm->cap->dummy_mixer) {
+				len += scnprintf(buf + len, MISR_BUFF_SIZE - len, "invalid\n");
+				SDE_ERROR("crtc:%d invalid misr ops\n", DRMID(crtc));
+			}
 			continue;
 		}
 
 		rc = m->hw_lm->ops.collect_misr(m->hw_lm, false, &misr_value);
 		if (rc) {
-			len += scnprintf(buf + len, MISR_BUFF_SIZE - len,
-					"invalid\n");
-			SDE_ERROR("crtc:%d failed to collect misr %d\n",
-					DRMID(crtc), rc);
+			len += scnprintf(buf + len, MISR_BUFF_SIZE - len, "invalid\n");
+			SDE_ERROR("crtc:%d failed to collect misr %d\n", DRMID(crtc), rc);
 			continue;
 		} else {
 			len += scnprintf(buf + len, MISR_BUFF_SIZE - len,
 					"lm idx:%d\n", m->hw_lm->idx - LM_0);
-			len += scnprintf(buf + len, MISR_BUFF_SIZE - len,
-					"0x%x\n", misr_value);
+			len += scnprintf(buf + len, MISR_BUFF_SIZE - len, "0x%x\n", misr_value);
 		}
 	}
 
diff --git a/msm/sde/sde_hw_catalog.c b/msm/sde/sde_hw_catalog.c
index 1a0c385791..fe163162c9 100644
--- a/msm/sde/sde_hw_catalog.c
+++ b/msm/sde/sde_hw_catalog.c
@@ -2175,8 +2175,7 @@ void sde_hw_mixer_set_preference(struct sde_mdss_cfg *sde_cfg, u32 num_lm,
 	}
 }
 
-static int sde_mixer_parse_dt(struct device_node *np,
-						struct sde_mdss_cfg *sde_cfg)
+static int sde_mixer_parse_dt(struct device_node *np, struct sde_mdss_cfg *sde_cfg)
 {
 	int rc = 0, i, j;
 	u32 off_count, blend_off_count, max_blendstages, lm_pair_mask;
@@ -2290,6 +2289,7 @@ static int sde_mixer_parse_dt(struct device_node *np,
 			if (mixer->base == dummy_mixer_base) {
 				mixer->base = 0x0;
 				mixer->len = 0;
+				mixer->dummy_mixer = true;
 			}
 		}
 
diff --git a/msm/sde/sde_hw_catalog.h b/msm/sde/sde_hw_catalog.h
index aaf5ad43fa..61256b139c 100644
--- a/msm/sde/sde_hw_catalog.h
+++ b/msm/sde/sde_hw_catalog.h
@@ -1060,6 +1060,7 @@ struct sde_sspp_cfg {
  * @dspp:              ID of connected DSPP, DSPP_MAX if unsupported
  * @pingpong:          ID of connected PingPong, PINGPONG_MAX if unsupported
  * @ds:                ID of connected DS, DS_MAX if unsupported
+ * @dummy_mixer:       identifies dcwb mixer is considered dummy
  * @lm_pair_mask:      Bitmask of LMs that can be controlled by same CTL
  */
 struct sde_lm_cfg {
@@ -1068,6 +1069,7 @@ struct sde_lm_cfg {
 	u32 dspp;
 	u32 pingpong;
 	u32 ds;
+	bool dummy_mixer;
 	unsigned long lm_pair_mask;
 };
 
diff --git a/msm/sde/sde_hw_lm.c b/msm/sde/sde_hw_lm.c
index cb1c1b6aff..16c78bc87c 100644
--- a/msm/sde/sde_hw_lm.c
+++ b/msm/sde/sde_hw_lm.c
@@ -422,7 +422,6 @@ struct sde_hw_mixer *sde_hw_lm_init(enum sde_lm idx,
 	/* Assign ops */
 	c->idx = idx;
 	c->cap = cfg;
-	_setup_mixer_ops(m, &c->ops, c->cap->features);
 
 	rc = sde_hw_blk_init(&c->base, SDE_HW_BLK_LM, idx, &sde_hw_ops);
 	if (rc) {
@@ -430,6 +429,12 @@ struct sde_hw_mixer *sde_hw_lm_init(enum sde_lm idx,
 		goto blk_init_error;
 	}
 
+	/* Dummy mixers should not setup ops and not be added to dump range */
+	if (cfg->dummy_mixer)
+		return c;
+
+	_setup_mixer_ops(m, &c->ops, c->cap->features);
+
 	sde_dbg_reg_register_dump_range(SDE_DBG_NAME, cfg->name, c->hw.blk_off,
 			c->hw.blk_off + c->hw.length, c->hw.xin_id);