From 7b21d611b76b7b11c7b75d25afbda93c8d36cf26 Mon Sep 17 00:00:00 2001
From: Kalyan Thota <kalyan_t@codeaurora.org>
Date: Mon, 25 Nov 2019 17:29:29 +0530
Subject: msm:disp:dpu1: add mixer selection for display topology
Git-commit: 42a558b71c9ead911a1486ca118c927e46e9d889
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

mixer selection in the display topology is based on multiple
factors
1) mixers available in the hw
2) interfaces to be enabled
3) merge capability

change will pickup mixer as per the topology need.

Signed-off-by: Kalyan Thota <kalyan_t@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c   | 21 ++++++++++++++++---
 .../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c    |  1 +
 .../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h    |  2 ++
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index f96e142c4361..8a6e0718bc17 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -58,7 +58,7 @@
 
 #define IDLE_SHORT_TIMEOUT	1
 
-#define MAX_VDISPLAY_SPLIT 1080
+#define MAX_HDISPLAY_SPLIT 1080
 
 /* timeout in frames waiting for frame done */
 #define DPU_ENCODER_FRAME_DONE_TIMEOUT_FRAMES 5
@@ -534,8 +534,23 @@ static struct msm_display_topology dpu_encoder_get_topology(
 		if (dpu_enc->phys_encs[i])
 			intf_count++;
 
-	/* User split topology for width > 1080 */
-	topology.num_lm = (mode->vdisplay > MAX_VDISPLAY_SPLIT) ? 2 : 1;
+	/* Datapath topology selection
+	 *
+	 * Dual display
+	 * 2 LM, 2 INTF ( Split display using 2 interfaces)
+	 *
+	 * Single display
+	 * 1 LM, 1 INTF
+	 * 2 LM, 1 INTF (stream merge to support high resolution interfaces)
+	 *
+	 */
+	if (intf_count == 2)
+		topology.num_lm = 2;
+	else if (!dpu_kms->catalog->caps->has_3d_merge)
+		topology.num_lm = 1;
+	else
+		topology.num_lm = (mode->hdisplay > MAX_HDISPLAY_SPLIT) ? 2 : 1;
+
 	topology.num_enc = 0;
 	topology.num_intf = intf_count;
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
index e4880a1c0b07..69de2c3e9650 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
@@ -67,6 +67,7 @@ static const struct dpu_caps sdm845_dpu_caps = {
 	.has_src_split = true,
 	.has_dim_layer = true,
 	.has_idle_pc = true,
+	.has_3d_merge = true,
 };
 
 static const struct dpu_caps sc7180_dpu_caps = {
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
index e052360689a5..8ff532a6f0cc 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
@@ -287,6 +287,7 @@ struct dpu_qos_lut_tbl {
  * @has_src_split      source split feature status
  * @has_dim_layer      dim layer feature status
  * @has_idle_pc        indicate if idle power collapse feature is supported
+ * @has_3d_merge       indicate if 3D merge is supported
  */
 struct dpu_caps {
 	u32 max_mixer_width;
@@ -297,6 +298,7 @@ struct dpu_caps {
 	bool has_src_split;
 	bool has_dim_layer;
 	bool has_idle_pc;
+	bool has_3d_merge;
 };
 
 /**
-- 
2.28.0