diff --git a/msm/msm_drv.h b/msm/msm_drv.h
index 4286b764f9..7d235538c0 100644
--- a/msm/msm_drv.h
+++ b/msm/msm_drv.h
@@ -849,6 +849,7 @@ struct msm_mode_info {
  * @num_ctl             number of ctl available
  * @num_3dmux           number of 3d mux available
  * @max_mixer_width:    max width supported by layer mixer
+ * @merge_3d_mask:      bitmap of available 3d mux resource
  */
 struct msm_resource_caps_info {
 	uint32_t num_lm_in_use;
@@ -858,6 +859,7 @@ struct msm_resource_caps_info {
 	uint32_t num_ctl;
 	uint32_t num_3dmux;
 	uint32_t max_mixer_width;
+	unsigned long merge_3d_mask;
 };
 
 /**
diff --git a/msm/sde/sde_hw_catalog.c b/msm/sde/sde_hw_catalog.c
index 436c8d1c86..bae8a8f357 100644
--- a/msm/sde/sde_hw_catalog.c
+++ b/msm/sde/sde_hw_catalog.c
@@ -2232,7 +2232,7 @@ static int sde_mixer_parse_dt(struct device_node *np, struct sde_mdss_cfg *sde_c
 	struct sde_lm_cfg *mixer;
 	struct sde_lm_sub_blks *sblk;
 	int pp_count, dspp_count, ds_count, mixer_count;
-	u32 pp_idx, dspp_idx, ds_idx;
+	u32 pp_idx, dspp_idx, ds_idx, merge_3d_idx;
 	u32 mixer_base;
 	struct device_node *snp = NULL;
 	struct sde_dt_props *props, *blend_props, *blocks_props = NULL;
@@ -2273,8 +2273,8 @@ static int sde_mixer_parse_dt(struct device_node *np, struct sde_mdss_cfg *sde_c
 		goto put_blocks;
 	}
 
-	for (i = 0, mixer_count = 0, pp_idx = 0, dspp_idx = 0,
-			ds_idx = 0; i < off_count; i++) {
+	for (i = 0, mixer_count = 0, pp_idx = 0, dspp_idx = 0, ds_idx = 0,
+			merge_3d_idx = 0; i < off_count; i++) {
 		const char *disp_pref = NULL;
 		const char *cwb_pref = NULL;
 		const char *dcwb_pref = NULL;
@@ -2348,6 +2348,7 @@ static int sde_mixer_parse_dt(struct device_node *np, struct sde_mdss_cfg *sde_c
 		mixer->dspp = dspp_count > 0 ? dspp_idx + DSPP_0
 							: DSPP_MAX;
 		mixer->ds = ds_count > 0 ? ds_idx + DS_0 : DS_MAX;
+		mixer->merge_3d = merge_3d_idx + MERGE_3D_0;
 		pp_count--;
 		dspp_count--;
 		ds_count--;
@@ -2356,6 +2357,12 @@ static int sde_mixer_parse_dt(struct device_node *np, struct sde_mdss_cfg *sde_c
 		ds_idx++;
 
 		mixer_count++;
+		/*
+		 * Since each 3dmux is assigned to a pair of LM,
+		 * increment this idx only at even LM counts
+		 */
+		if ((mixer_count & 1) == 0)
+			merge_3d_idx++;
 
 		sblk->gc.id = SDE_MIXER_GC;
 		if (blocks_props && blocks_props->exists[MIXER_GC_PROP]) {
diff --git a/msm/sde/sde_hw_catalog.h b/msm/sde/sde_hw_catalog.h
index da049a26ac..58eb8d7a8d 100644
--- a/msm/sde/sde_hw_catalog.h
+++ b/msm/sde/sde_hw_catalog.h
@@ -1348,6 +1348,7 @@ 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
+ * @merge_3d:          ID of connected 3d MUX
  * @dummy_mixer:       identifies dcwb mixer is considered dummy
  * @lm_pair_mask:      Bitmask of LMs that can be controlled by same CTL
  */
@@ -1357,6 +1358,7 @@ struct sde_lm_cfg {
 	u32 dspp;
 	u32 pingpong;
 	u32 ds;
+	u32 merge_3d;
 	bool dummy_mixer;
 	unsigned long lm_pair_mask;
 };
diff --git a/msm/sde/sde_rm.c b/msm/sde/sde_rm.c
index cbe5d3ea17..751ccedf97 100644
--- a/msm/sde/sde_rm.c
+++ b/msm/sde/sde_rm.c
@@ -213,23 +213,23 @@ static void _sde_rm_inc_resource_info_lm(struct sde_rm *rm,
 	list_for_each_entry(blk2, &rm->hw_blks[SDE_HW_BLK_LM], list) {
 		lm_cfg2 = to_sde_hw_mixer(blk2->hw)->cap;
 		/*
-		 * If lm2 is free, or
-		 * lm1 & lm2 reserved by same enc, check mask
+		 * If the paired lm is free, or is reserved by the same encoder
+		 * set the bit for the 3d mux associated with the lm
+		 * counting these set bits will give an accurate count of available 3dmux
 		 */
-		if ((!blk2->rsvp || (blk->rsvp &&
-				blk2->rsvp->enc_id == blk->rsvp->enc_id
-				&& lm_cfg->id > lm_cfg2->id)) &&
+		if ((!blk2->rsvp || (blk->rsvp && blk2->rsvp->enc_id == blk->rsvp->enc_id)) &&
 				test_bit(lm_cfg->id, &lm_cfg2->lm_pair_mask))
-			avail_res->num_3dmux++;
+			set_bit(lm_cfg->merge_3d, &avail_res->merge_3d_mask);
 	}
+
+	avail_res->num_3dmux = hweight_long(avail_res->merge_3d_mask);
 }
 
 static void _sde_rm_dec_resource_info_lm(struct sde_rm *rm,
 	struct msm_resource_caps_info *avail_res,
 	struct sde_rm_hw_blk *blk)
 {
-	struct sde_rm_hw_blk *blk2;
-	const struct sde_lm_cfg *lm_cfg, *lm_cfg2;
+	const struct sde_lm_cfg *lm_cfg;
 
 	lm_cfg = to_sde_hw_mixer(blk->hw)->cap;
 
@@ -239,14 +239,12 @@ static void _sde_rm_dec_resource_info_lm(struct sde_rm *rm,
 
 	avail_res->num_lm--;
 
-	/* Check for 3d muxes by comparing paired lms */
-	list_for_each_entry(blk2, &rm->hw_blks[SDE_HW_BLK_LM], list) {
-		lm_cfg2 = to_sde_hw_mixer(blk2->hw)->cap;
-		/* If lm2 is free and lm1 is now being reserved */
-		if (!blk2->rsvp &&
-				test_bit(lm_cfg->id, &lm_cfg2->lm_pair_mask))
-			avail_res->num_3dmux--;
-	}
+	/*
+	 * Clear the bit for the 3d mux associated with the lm
+	 * counting these set bits will give an accurate count of available 3dmux
+	 */
+	clear_bit(lm_cfg->merge_3d, &avail_res->merge_3d_mask);
+	avail_res->num_3dmux = hweight_long(avail_res->merge_3d_mask);
 }
 
 static void _sde_rm_inc_resource_info(struct sde_rm *rm,