[DPU PATCH v2 11/12] drm/msm/dpu: move dpu_power_handle to dpu folder

[Rajesh Yadav <ryadav-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>]

Now, since dpu_power_handle manages only bus scaling
and power enable/disable notifications which are restricted
to dpu driver, move dpu_power_handle to dpu folder.

Changes in v2:
	- resolved conflict in dpu_unbind
	- dropped (Reviewed-by: Sean Paul) due to above change

Signed-off-by: Rajesh Yadav <ryadav@codeaurora.org>
---
 drivers/gpu/drm/msm/Makefile                     |   2 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c     |   1 -
 drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c    |   5 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c         |   7 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h         |   2 +
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c      |   1 -
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c          |  39 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h          |   1 +
 drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.c | 693 +++++++++++++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.h | 288 ++++++++++
 drivers/gpu/drm/msm/dpu_power_handle.c           | 693 -----------------------
 drivers/gpu/drm/msm/dpu_power_handle.h           | 288 ----------
 drivers/gpu/drm/msm/msm_drv.c                    |   9 -
 drivers/gpu/drm/msm/msm_drv.h                    |   4 -
 14 files changed, 1013 insertions(+), 1020 deletions(-)
 create mode 100644 drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.c
 create mode 100644 drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.h
 delete mode 100644 drivers/gpu/drm/msm/dpu_power_handle.c
 delete mode 100644 drivers/gpu/drm/msm/dpu_power_handle.h

diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index d9826c1..f578d5a 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -82,10 +82,10 @@ msm-y := \
 	disp/dpu1/dpu_rm.o \
 	disp/dpu1/dpu_vbif.o \
 	disp/dpu1/dpu_mdss.o \
+	disp/dpu1/dpu_power_handle.o \
 	dpu_dbg.o \
 	dpu_io_util.o \
 	dpu_dbg_evtlog.o \
-	dpu_power_handle.o \
 	msm_prop.o \
 	msm_atomic.o \
 	msm_debugfs.o \
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c
index 5c5cc56..33ab2ac 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c
@@ -18,7 +18,6 @@
 #include <linux/kthread.h>
 
 #include "dpu_core_irq.h"
-#include "dpu_power_handle.h"
 
 /**
  * dpu_core_irq_callback_handler - dispatch core interrupts
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
index 2cf3fca..d3a1ed9 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
@@ -257,7 +257,6 @@ static void _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
 					= dpu_crtc_get_client_type(crtc);
 	struct drm_crtc *tmp_crtc;
 	struct dpu_crtc_state *dpu_cstate;
-	struct msm_drm_private *priv = kms->dev->dev_private;
 
 	drm_for_each_crtc(tmp_crtc, crtc->dev) {
 		if (_dpu_core_perf_crtc_is_power_on(tmp_crtc) &&
@@ -287,7 +286,7 @@ static void _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
 
 	switch (curr_client_type) {
 	case NRT_CLIENT:
-		dpu_power_data_bus_set_quota(&priv->phandle, kms->core_client,
+		dpu_power_data_bus_set_quota(&kms->phandle, kms->core_client,
 				DPU_POWER_HANDLE_DATA_BUS_CLIENT_NRT,
 				bus_id, bus_ab_quota, bus_ib_quota);
 		DPU_DEBUG("client:%s bus_id=%d ab=%llu ib=%llu\n", "nrt",
@@ -295,7 +294,7 @@ static void _dpu_core_perf_crtc_update_bus(struct dpu_kms *kms,
 		break;
 
 	case RT_CLIENT:
-		dpu_power_data_bus_set_quota(&priv->phandle, kms->core_client,
+		dpu_power_data_bus_set_quota(&kms->phandle, kms->core_client,
 				DPU_POWER_HANDLE_DATA_BUS_CLIENT_RT,
 				bus_id, bus_ab_quota, bus_ib_quota);
 		DPU_DEBUG("client:%s bus_id=%d ab=%llu ib=%llu\n", "rt",
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index e2d2e32..99c5e75 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -598,6 +598,7 @@ static void dpu_crtc_destroy(struct drm_crtc *crtc)
 	_dpu_crtc_destroy_dest_scaler(dpu_crtc);
 
 	_dpu_crtc_deinit_events(dpu_crtc);
+	dpu_crtc->phandle = NULL;
 
 	drm_crtc_cleanup(crtc);
 	mutex_destroy(&dpu_crtc->crtc_lock);
@@ -2572,7 +2573,7 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
 	}
 
 	if (dpu_crtc->power_event)
-		dpu_power_handle_unregister_event(&priv->phandle,
+		dpu_power_handle_unregister_event(dpu_crtc->phandle,
 				dpu_crtc->power_event);
 
 
@@ -2643,7 +2644,7 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 	mutex_unlock(&dpu_crtc->crtc_lock);
 
 	dpu_crtc->power_event = dpu_power_handle_register_event(
-		&priv->phandle,
+		dpu_crtc->phandle,
 		DPU_POWER_EVENT_POST_ENABLE | DPU_POWER_EVENT_POST_DISABLE |
 		DPU_POWER_EVENT_PRE_DISABLE,
 		dpu_crtc_handle_power_event, crtc, dpu_crtc->name);
@@ -3938,6 +3939,8 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane)
 	dpu_cp_crtc_init(crtc);
 	dpu_cp_crtc_install_properties(crtc);
 
+	dpu_crtc->phandle = &kms->phandle;
+
 	DPU_DEBUG("%s: successfully initialized crtc\n", dpu_crtc->name);
 	return crtc;
 }
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
index 9304058..671d909 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h
@@ -184,6 +184,7 @@ struct dpu_crtc_event {
  * @misr_enable   : boolean entry indicates misr enable/disable status.
  * @misr_frame_count  : misr frame count provided by client
  * @misr_data     : store misr data before turning off the clocks.
+ * @phandle: Pointer to power handler
  * @power_event   : registered power event handle
  * @cur_perf      : current performance committed to clock/bandwidth driver
  * @rp_lock       : serialization lock for resource pool
@@ -240,6 +241,7 @@ struct dpu_crtc {
 	u32 misr_frame_count;
 	u32 misr_data[CRTC_DUAL_MIXERS];
 
+	struct dpu_power_handle *phandle;
 	struct dpu_power_event *power_event;
 
 	struct dpu_core_perf_params cur_perf;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 298a6ef..11ae6cc 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -31,7 +31,6 @@
 #include "dpu_hw_ctl.h"
 #include "dpu_formats.h"
 #include "dpu_encoder_phys.h"
-#include "dpu_power_handle.h"
 #include "dpu_crtc.h"
 #include "dpu_trace.h"
 #include "dpu_core_irq.h"
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 9c3b220..0598cfb 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1017,24 +1017,19 @@ static long dpu_kms_round_pixclk(struct msm_kms *kms, unsigned long rate,
 static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
 {
 	struct drm_device *dev;
-	struct msm_drm_private *priv;
 	int i;
 
 	dev = dpu_kms->dev;
 	if (!dev)
 		return;
 
-	priv = dev->dev_private;
-	if (!priv)
-		return;
-
 	if (dpu_kms->hw_intr)
 		dpu_hw_intr_destroy(dpu_kms->hw_intr);
 	dpu_kms->hw_intr = NULL;
 
 	if (dpu_kms->power_event)
 		dpu_power_handle_unregister_event(
-				&priv->phandle, dpu_kms->power_event);
+				&dpu_kms->phandle, dpu_kms->power_event);
 
 	/* safe to call these more than once during shutdown */
 	_dpu_debugfs_destroy(dpu_kms);
@@ -1067,7 +1062,8 @@ static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
 	dpu_kms->catalog = NULL;
 
 	if (dpu_kms->core_client)
-		dpu_power_client_destroy(&priv->phandle, dpu_kms->core_client);
+		dpu_power_client_destroy(&dpu_kms->phandle,
+			dpu_kms->core_client);
 	dpu_kms->core_client = NULL;
 
 	if (dpu_kms->vbif[VBIF_NRT])
@@ -1624,7 +1620,8 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	}
 #endif
 
-	dpu_kms->core_client = dpu_power_client_create(&priv->phandle, "core");
+	dpu_kms->core_client = dpu_power_client_create(&dpu_kms->phandle,
+					"core");
 	if (IS_ERR_OR_NULL(dpu_kms->core_client)) {
 		rc = PTR_ERR(dpu_kms->core_client);
 		if (!dpu_kms->core_client)
@@ -1721,7 +1718,8 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 #endif
 
 	rc = dpu_core_perf_init(&dpu_kms->perf, dev, dpu_kms->catalog,
-			&priv->phandle, _dpu_kms_get_clk(dpu_kms, "core_clk"));
+			&dpu_kms->phandle,
+			_dpu_kms_get_clk(dpu_kms, "core_clk"));
 	if (rc) {
 		DPU_ERROR("failed to init perf %d\n", rc);
 		goto perf_err;
@@ -1765,7 +1763,8 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	 * Handle (re)initializations during power enable
 	 */
 	dpu_kms_handle_power_event(DPU_POWER_EVENT_POST_ENABLE, dpu_kms);
-	dpu_kms->power_event = dpu_power_handle_register_event(&priv->phandle,
+	dpu_kms->power_event = dpu_power_handle_register_event(
+			&dpu_kms->phandle,
 			DPU_POWER_EVENT_POST_ENABLE,
 			dpu_kms_handle_power_event, dpu_kms, "kms");
 
@@ -1841,6 +1840,12 @@ static int dpu_bind(struct device *dev, struct device *master, void *data)
 		goto clk_rate_error;
 	}
 
+	ret = dpu_power_resource_init(pdev, &dpu_kms->phandle);
+	if (ret) {
+		pr_err("dpu power resource init failed\n");
+		goto power_init_fail;
+	}
+
 	platform_set_drvdata(pdev, dpu_kms);
 
 	msm_kms_init(&dpu_kms->base, &kms_funcs);
@@ -1853,6 +1858,7 @@ static int dpu_bind(struct device *dev, struct device *master, void *data)
 	priv->kms = &dpu_kms->base;
 	return ret;
 
+power_init_fail:
 clk_rate_error:
 	msm_dss_put_clk(mp->clk_config, mp->num_clk);
 clk_get_error:
@@ -1867,6 +1873,7 @@ static void dpu_unbind(struct device *dev, struct device *master, void *data)
 	struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
 	struct dss_module_power *mp = &dpu_kms->mp;
 
+	dpu_power_resource_deinit(pdev, &dpu_kms->phandle);
 	msm_dss_put_clk(mp->clk_config, mp->num_clk);
 	devm_kfree(&pdev->dev, mp->clk_config);
 	mp->num_clk = 0;
@@ -1897,7 +1904,6 @@ static int dpu_runtime_suspend(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
 	struct drm_device *ddev;
-	struct msm_drm_private *priv;
 	struct dss_module_power *mp = &dpu_kms->mp;
 
 	ddev = dpu_kms->dev;
@@ -1905,10 +1911,9 @@ static int dpu_runtime_suspend(struct device *dev)
 		DPU_ERROR("invalid drm_device\n");
 		goto exit;
 	}
-	priv = ddev->dev_private;
 
-	rc = dpu_power_resource_enable(&priv->phandle,
-		dpu_kms->core_client, false);
+	rc = dpu_power_resource_enable(&dpu_kms->phandle,
+			dpu_kms->core_client, false);
 	if (rc)
 		DPU_ERROR("resource disable failed: %d\n", rc);
 
@@ -1926,7 +1931,6 @@ static int dpu_runtime_resume(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
 	struct drm_device *ddev;
-	struct msm_drm_private *priv;
 	struct dss_module_power *mp = &dpu_kms->mp;
 
 	ddev = dpu_kms->dev;
@@ -1934,7 +1938,6 @@ static int dpu_runtime_resume(struct device *dev)
 		DPU_ERROR("invalid drm_device\n");
 		goto exit;
 	}
-	priv = ddev->dev_private;
 
 	rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, true);
 	if (rc) {
@@ -1942,8 +1945,8 @@ static int dpu_runtime_resume(struct device *dev)
 		goto exit;
 	}
 
-	rc = dpu_power_resource_enable(&priv->phandle, dpu_kms->core_client,
-		true);
+	rc = dpu_power_resource_enable(&dpu_kms->phandle,
+			dpu_kms->core_client, true);
 	if (rc)
 		DPU_ERROR("resource enable failed: %d\n", rc);
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
index a8255fe..c48ed4e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
@@ -164,6 +164,7 @@ struct dpu_kms {
 	struct dpu_mdss_cfg *catalog;
 
 	struct msm_gem_address_space *aspace[MSM_SMMU_DOMAIN_MAX];
+	struct dpu_power_handle phandle;
 	struct dpu_power_client *core_client;
 #ifdef CONFIG_ION
 	struct ion_client *iclient;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.c
new file mode 100644
index 0000000..77be106
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.c
@@ -0,0 +1,693 @@
+/* Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#define pr_fmt(fmt)	"[drm:%s:%d]: " fmt, __func__, __LINE__
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/string.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/of_platform.h>
+#ifdef CONFIG_QCOM_BUS_SCALING
+#include <linux/msm-bus.h>
+#include <linux/msm-bus-board.h>
+#endif
+#include <linux/dpu_io_util.h>
+
+#include "dpu_power_handle.h"
+#include "dpu_trace.h"
+
+static const char *data_bus_name[DPU_POWER_HANDLE_DBUS_ID_MAX] = {
+	[DPU_POWER_HANDLE_DBUS_ID_MNOC] = "qcom,dpu-data-bus",
+	[DPU_POWER_HANDLE_DBUS_ID_LLCC] = "qcom,dpu-llcc-bus",
+	[DPU_POWER_HANDLE_DBUS_ID_EBI] = "qcom,dpu-ebi-bus",
+};
+
+const char *dpu_power_handle_get_dbus_name(u32 bus_id)
+{
+	if (bus_id < DPU_POWER_HANDLE_DBUS_ID_MAX)
+		return data_bus_name[bus_id];
+
+	return NULL;
+}
+
+static void dpu_power_event_trigger_locked(struct dpu_power_handle *phandle,
+		u32 event_type)
+{
+	struct dpu_power_event *event;
+
+	list_for_each_entry(event, &phandle->event_list, list) {
+		if (event->event_type & event_type)
+			event->cb_fnc(event_type, event->usr);
+	}
+}
+
+struct dpu_power_client *dpu_power_client_create(
+	struct dpu_power_handle *phandle, char *client_name)
+{
+	struct dpu_power_client *client;
+	static u32 id;
+
+	if (!client_name || !phandle) {
+		pr_err("client name is null or invalid power data\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	client = kzalloc(sizeof(struct dpu_power_client), GFP_KERNEL);
+	if (!client)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_lock(&phandle->phandle_lock);
+	strlcpy(client->name, client_name, MAX_CLIENT_NAME_LEN);
+	client->usecase_ndx = VOTE_INDEX_DISABLE;
+	client->id = id;
+	client->active = true;
+	pr_debug("client %s created:%pK id :%d\n", client_name,
+		client, id);
+	id++;
+	list_add(&client->list, &phandle->power_client_clist);
+	mutex_unlock(&phandle->phandle_lock);
+
+	return client;
+}
+
+void dpu_power_client_destroy(struct dpu_power_handle *phandle,
+	struct dpu_power_client *client)
+{
+	if (!client  || !phandle) {
+		pr_err("reg bus vote: invalid client handle\n");
+	} else if (!client->active) {
+		pr_err("dpu power deinit already done\n");
+		kfree(client);
+	} else {
+		pr_debug("bus vote client %s destroyed:%pK id:%u\n",
+			client->name, client, client->id);
+		mutex_lock(&phandle->phandle_lock);
+		list_del_init(&client->list);
+		mutex_unlock(&phandle->phandle_lock);
+		kfree(client);
+	}
+}
+
+#ifdef CONFIG_QCOM_BUS_SCALING
+
+#define MAX_AXI_PORT_COUNT 3
+
+static int _dpu_power_data_bus_set_quota(
+		struct dpu_power_data_bus_handle *pdbus,
+		u64 ab_quota_rt, u64 ab_quota_nrt,
+		u64 ib_quota_rt, u64 ib_quota_nrt)
+{
+	int new_uc_idx;
+	u64 ab_quota[MAX_AXI_PORT_COUNT] = {0, 0};
+	u64 ib_quota[MAX_AXI_PORT_COUNT] = {0, 0};
+	int rc;
+
+	if (pdbus->data_bus_hdl < 1) {
+		pr_err("invalid bus handle %d\n", pdbus->data_bus_hdl);
+		return -EINVAL;
+	}
+
+	pdbus->ab_rt = ab_quota_rt;
+	pdbus->ib_rt = ib_quota_rt;
+	pdbus->ab_nrt = ab_quota_nrt;
+	pdbus->ib_nrt = ib_quota_nrt;
+
+	if (pdbus->enable) {
+		ab_quota_rt = max_t(u64, ab_quota_rt,
+				DPU_POWER_HANDLE_ENABLE_BUS_AB_QUOTA);
+		ib_quota_rt = max_t(u64, ib_quota_rt,
+				DPU_POWER_HANDLE_ENABLE_BUS_IB_QUOTA);
+		ab_quota_nrt = max_t(u64, ab_quota_nrt,
+				DPU_POWER_HANDLE_ENABLE_BUS_AB_QUOTA);
+		ib_quota_nrt = max_t(u64, ib_quota_nrt,
+				DPU_POWER_HANDLE_ENABLE_BUS_IB_QUOTA);
+	} else {
+		ab_quota_rt = min_t(u64, ab_quota_rt,
+				DPU_POWER_HANDLE_DISABLE_BUS_AB_QUOTA);
+		ib_quota_rt = min_t(u64, ib_quota_rt,
+				DPU_POWER_HANDLE_DISABLE_BUS_IB_QUOTA);
+		ab_quota_nrt = min_t(u64, ab_quota_nrt,
+				DPU_POWER_HANDLE_DISABLE_BUS_AB_QUOTA);
+		ib_quota_nrt = min_t(u64, ib_quota_nrt,
+				DPU_POWER_HANDLE_DISABLE_BUS_IB_QUOTA);
+	}
+
+	if (!ab_quota_rt && !ab_quota_nrt && !ib_quota_rt && !ib_quota_nrt)  {
+		new_uc_idx = 0;
+	} else {
+		int i;
+		struct msm_bus_vectors *vect = NULL;
+		struct msm_bus_scale_pdata *bw_table =
+			pdbus->data_bus_scale_table;
+		u32 nrt_axi_port_cnt = pdbus->nrt_axi_port_cnt;
+		u32 total_axi_port_cnt = pdbus->axi_port_cnt;
+		u32 rt_axi_port_cnt = total_axi_port_cnt - nrt_axi_port_cnt;
+
+		if (!bw_table || !total_axi_port_cnt ||
+		    total_axi_port_cnt > MAX_AXI_PORT_COUNT) {
+			pr_err("invalid input\n");
+			return -EINVAL;
+		}
+
+		if (pdbus->bus_channels) {
+			ib_quota_rt = div_u64(ib_quota_rt,
+						pdbus->bus_channels);
+			ib_quota_nrt = div_u64(ib_quota_nrt,
+						pdbus->bus_channels);
+		}
+
+		if (nrt_axi_port_cnt) {
+
+			ab_quota_rt = div_u64(ab_quota_rt, rt_axi_port_cnt);
+			ab_quota_nrt = div_u64(ab_quota_nrt, nrt_axi_port_cnt);
+
+			for (i = 0; i < total_axi_port_cnt; i++) {
+				if (i < rt_axi_port_cnt) {
+					ab_quota[i] = ab_quota_rt;
+					ib_quota[i] = ib_quota_rt;
+				} else {
+					ab_quota[i] = ab_quota_nrt;
+					ib_quota[i] = ib_quota_nrt;
+				}
+			}
+		} else {
+			ab_quota[0] = div_u64(ab_quota_rt + ab_quota_nrt,
+					total_axi_port_cnt);
+			ib_quota[0] = ib_quota_rt + ib_quota_nrt;
+
+			for (i = 1; i < total_axi_port_cnt; i++) {
+				ab_quota[i] = ab_quota[0];
+				ib_quota[i] = ib_quota[0];
+			}
+		}
+
+		new_uc_idx = (pdbus->curr_bw_uc_idx %
+			(bw_table->num_usecases - 1)) + 1;
+
+		for (i = 0; i < total_axi_port_cnt; i++) {
+			vect = &bw_table->usecase[new_uc_idx].vectors[i];
+			vect->ab = ab_quota[i];
+			vect->ib = ib_quota[i];
+
+			pr_debug(
+				"%s uc_idx=%d %s path idx=%d ab=%llu ib=%llu\n",
+				bw_table->name,
+				new_uc_idx, (i < rt_axi_port_cnt) ? "rt" : "nrt"
+				, i, vect->ab, vect->ib);
+		}
+	}
+	pdbus->curr_bw_uc_idx = new_uc_idx;
+	pdbus->ao_bw_uc_idx = new_uc_idx;
+
+	DPU_ATRACE_BEGIN("msm_bus_scale_req");
+	rc = msm_bus_scale_client_update_request(pdbus->data_bus_hdl,
+			new_uc_idx);
+	DPU_ATRACE_END("msm_bus_scale_req");
+
+	return rc;
+}
+
+int dpu_power_data_bus_set_quota(struct dpu_power_handle *phandle,
+		struct dpu_power_client *pclient,
+		int bus_client, u32 bus_id,
+		u64 ab_quota, u64 ib_quota)
+{
+	int rc = 0;
+	int i;
+	u64 total_ab_rt = 0, total_ib_rt = 0;
+	u64 total_ab_nrt = 0, total_ib_nrt = 0;
+	struct dpu_power_client *client;
+
+	if (!phandle || !pclient ||
+			bus_client >= DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX ||
+			bus_id >= DPU_POWER_HANDLE_DBUS_ID_MAX) {
+		pr_err("invalid parameters\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&phandle->phandle_lock);
+
+	pclient->ab[bus_client] = ab_quota;
+	pclient->ib[bus_client] = ib_quota;
+	trace_dpu_perf_update_bus(bus_client, ab_quota, ib_quota);
+
+	list_for_each_entry(client, &phandle->power_client_clist, list) {
+		for (i = 0; i < DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX; i++) {
+			if (i == DPU_POWER_HANDLE_DATA_BUS_CLIENT_NRT) {
+				total_ab_nrt += client->ab[i];
+				total_ib_nrt += client->ib[i];
+			} else {
+				total_ab_rt += client->ab[i];
+				total_ib_rt = max(total_ib_rt, client->ib[i]);
+			}
+		}
+	}
+
+	if (phandle->data_bus_handle[bus_id].data_bus_hdl)
+		rc = _dpu_power_data_bus_set_quota(
+			&phandle->data_bus_handle[bus_id],
+			total_ab_rt, total_ab_nrt,
+			total_ib_rt, total_ib_nrt);
+
+	mutex_unlock(&phandle->phandle_lock);
+
+	return rc;
+}
+
+static void dpu_power_data_bus_unregister(
+		struct dpu_power_data_bus_handle *pdbus)
+{
+	if (pdbus->data_bus_hdl) {
+		msm_bus_scale_unregister_client(pdbus->data_bus_hdl);
+		pdbus->data_bus_hdl = 0;
+	}
+}
+
+static int dpu_power_data_bus_parse(struct platform_device *pdev,
+	struct dpu_power_data_bus_handle *pdbus, const char *name)
+{
+	struct device_node *node;
+	int rc = 0;
+	int paths;
+
+	pdbus->bus_channels = 1;
+	rc = of_property_read_u32(pdev->dev.of_node,
+		"qcom,dpu-dram-channels", &pdbus->bus_channels);
+	if (rc) {
+		pr_debug("number of channels property not specified\n");
+		rc = 0;
+	}
+
+	pdbus->nrt_axi_port_cnt = 0;
+	rc = of_property_read_u32(pdev->dev.of_node,
+			"qcom,dpu-num-nrt-paths",
+			&pdbus->nrt_axi_port_cnt);
+	if (rc) {
+		pr_debug("number of axi port property not specified\n");
+		rc = 0;
+	}
+
+	node = of_get_child_by_name(pdev->dev.of_node, name);
+	if (node) {
+		rc = of_property_read_u32(node,
+				"qcom,msm-bus,num-paths", &paths);
+		if (rc) {
+			pr_err("Error. qcom,msm-bus,num-paths not found\n");
+			return rc;
+		}
+		pdbus->axi_port_cnt = paths;
+
+		pdbus->data_bus_scale_table =
+				msm_bus_pdata_from_node(pdev, node);
+		if (IS_ERR_OR_NULL(pdbus->data_bus_scale_table)) {
+			pr_err("reg bus handle parsing failed\n");
+			rc = PTR_ERR(pdbus->data_bus_scale_table);
+			if (!pdbus->data_bus_scale_table)
+				rc = -EINVAL;
+			goto end;
+		}
+		pdbus->data_bus_hdl = msm_bus_scale_register_client(
+				pdbus->data_bus_scale_table);
+		if (!pdbus->data_bus_hdl) {
+			pr_err("data_bus_client register failed\n");
+			rc = -EINVAL;
+			goto end;
+		}
+		pr_debug("register %s data_bus_hdl=%x\n", name,
+				pdbus->data_bus_hdl);
+	}
+
+end:
+	return rc;
+}
+
+static int dpu_power_reg_bus_parse(struct platform_device *pdev,
+	struct dpu_power_handle *phandle)
+{
+	struct device_node *node;
+	struct msm_bus_scale_pdata *bus_scale_table;
+	int rc = 0;
+
+	node = of_get_child_by_name(pdev->dev.of_node, "qcom,dpu-reg-bus");
+	if (node) {
+		bus_scale_table = msm_bus_pdata_from_node(pdev, node);
+		if (IS_ERR_OR_NULL(bus_scale_table)) {
+			pr_err("reg bus handle parsing failed\n");
+			rc = PTR_ERR(bus_scale_table);
+			if (!bus_scale_table)
+				rc = -EINVAL;
+			goto end;
+		}
+		phandle->reg_bus_hdl = msm_bus_scale_register_client(
+			      bus_scale_table);
+		if (!phandle->reg_bus_hdl) {
+			pr_err("reg_bus_client register failed\n");
+			rc = -EINVAL;
+			goto end;
+		}
+		pr_debug("register reg_bus_hdl=%x\n", phandle->reg_bus_hdl);
+	}
+
+end:
+	return rc;
+}
+
+static void dpu_power_reg_bus_unregister(u32 reg_bus_hdl)
+{
+	if (reg_bus_hdl)
+		msm_bus_scale_unregister_client(reg_bus_hdl);
+}
+
+int dpu_power_data_bus_state_update(struct dpu_power_handle *phandle,
+							bool enable)
+{
+	int i;
+
+	if (!phandle) {
+		pr_err("invalid param\n");
+		return -EINVAL;
+	}
+
+	for (i = DPU_POWER_HANDLE_DBUS_ID_MNOC;
+			i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++)
+		phandle->data_bus_handle[i].enable = enable;
+
+	return 0;
+}
+
+static int dpu_power_data_bus_update(struct dpu_power_data_bus_handle *pdbus,
+							bool enable)
+{
+	int rc = 0;
+
+	pdbus->enable = enable;
+
+	if (pdbus->data_bus_hdl)
+		rc = _dpu_power_data_bus_set_quota(pdbus, pdbus->ab_rt,
+				pdbus->ab_nrt, pdbus->ib_rt, pdbus->ib_nrt);
+
+	if (rc)
+		pr_err("failed to set data bus vote rc=%d enable:%d\n",
+							rc, enable);
+
+	return rc;
+}
+
+static int dpu_power_reg_bus_update(u32 reg_bus_hdl, u32 usecase_ndx)
+{
+	int rc = 0;
+
+	if (reg_bus_hdl)
+		rc = msm_bus_scale_client_update_request(reg_bus_hdl,
+								usecase_ndx);
+	if (rc)
+		pr_err("failed to set reg bus vote rc=%d\n", rc);
+
+	return rc;
+}
+#else
+static int dpu_power_data_bus_parse(struct platform_device *pdev,
+		struct dpu_power_data_bus_handle *pdbus, const char *name)
+{
+	return 0;
+}
+
+static void dpu_power_data_bus_unregister(
+		struct dpu_power_data_bus_handle *pdbus)
+{
+}
+
+int dpu_power_data_bus_set_quota(struct dpu_power_handle *phandle,
+		struct dpu_power_client *pclient,
+		int bus_client, u32 bus_id,
+		u64 ab_quota, u64 ib_quota)
+{
+	return 0;
+}
+
+static int dpu_power_reg_bus_parse(struct platform_device *pdev,
+	struct dpu_power_handle *phandle)
+{
+	return 0;
+}
+
+static void dpu_power_reg_bus_unregister(u32 reg_bus_hdl)
+{
+}
+
+static int dpu_power_reg_bus_update(u32 reg_bus_hdl, u32 usecase_ndx)
+{
+	return 0;
+}
+
+static int dpu_power_data_bus_update(struct dpu_power_data_bus_handle *pdbus,
+							bool enable)
+{
+	return 0;
+}
+
+int dpu_power_data_bus_state_update(struct dpu_power_handle *phandle,
+							bool enable)
+{
+	return 0;
+}
+#endif
+
+int dpu_power_resource_init(struct platform_device *pdev,
+	struct dpu_power_handle *phandle)
+{
+	int rc = 0, i;
+
+	if (!phandle || !pdev) {
+		pr_err("invalid input param\n");
+		return -EINVAL;
+	}
+
+	phandle->dev = &pdev->dev;
+
+	rc = dpu_power_reg_bus_parse(pdev, phandle);
+	if (rc) {
+		pr_err("register bus parse failed rc=%d\n", rc);
+		return rc;
+	}
+
+	for (i = DPU_POWER_HANDLE_DBUS_ID_MNOC;
+			i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++) {
+		rc = dpu_power_data_bus_parse(pdev,
+				&phandle->data_bus_handle[i],
+				data_bus_name[i]);
+		if (rc) {
+			pr_err("register data bus parse failed id=%d rc=%d\n",
+					i, rc);
+			goto data_bus_err;
+		}
+	}
+
+	INIT_LIST_HEAD(&phandle->power_client_clist);
+	INIT_LIST_HEAD(&phandle->event_list);
+
+	mutex_init(&phandle->phandle_lock);
+
+	return rc;
+
+data_bus_err:
+	for (i--; i >= 0; i--)
+		dpu_power_data_bus_unregister(&phandle->data_bus_handle[i]);
+	dpu_power_reg_bus_unregister(phandle->reg_bus_hdl);
+	return rc;
+}
+
+void dpu_power_resource_deinit(struct platform_device *pdev,
+	struct dpu_power_handle *phandle)
+{
+	struct dpu_power_client *curr_client, *next_client;
+	struct dpu_power_event *curr_event, *next_event;
+	int i;
+
+	if (!phandle || !pdev) {
+		pr_err("invalid input param\n");
+		return;
+	}
+
+	mutex_lock(&phandle->phandle_lock);
+	list_for_each_entry_safe(curr_client, next_client,
+			&phandle->power_client_clist, list) {
+		pr_err("cliend:%s-%d still registered with refcount:%d\n",
+				curr_client->name, curr_client->id,
+				curr_client->refcount);
+		curr_client->active = false;
+		list_del(&curr_client->list);
+	}
+
+	list_for_each_entry_safe(curr_event, next_event,
+			&phandle->event_list, list) {
+		pr_err("event:%d, client:%s still registered\n",
+				curr_event->event_type,
+				curr_event->client_name);
+		curr_event->active = false;
+		list_del(&curr_event->list);
+	}
+	mutex_unlock(&phandle->phandle_lock);
+
+	for (i = 0; i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++)
+		dpu_power_data_bus_unregister(&phandle->data_bus_handle[i]);
+
+	dpu_power_reg_bus_unregister(phandle->reg_bus_hdl);
+}
+
+int dpu_power_resource_enable(struct dpu_power_handle *phandle,
+	struct dpu_power_client *pclient, bool enable)
+{
+	int rc = 0, i;
+	bool changed = false;
+	u32 max_usecase_ndx = VOTE_INDEX_DISABLE, prev_usecase_ndx;
+	struct dpu_power_client *client;
+
+	if (!phandle || !pclient) {
+		pr_err("invalid input argument\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&phandle->phandle_lock);
+	if (enable)
+		pclient->refcount++;
+	else if (pclient->refcount)
+		pclient->refcount--;
+
+	if (pclient->refcount)
+		pclient->usecase_ndx = VOTE_INDEX_LOW;
+	else
+		pclient->usecase_ndx = VOTE_INDEX_DISABLE;
+
+	list_for_each_entry(client, &phandle->power_client_clist, list) {
+		if (client->usecase_ndx < VOTE_INDEX_MAX &&
+		    client->usecase_ndx > max_usecase_ndx)
+			max_usecase_ndx = client->usecase_ndx;
+	}
+
+	if (phandle->current_usecase_ndx != max_usecase_ndx) {
+		changed = true;
+		prev_usecase_ndx = phandle->current_usecase_ndx;
+		phandle->current_usecase_ndx = max_usecase_ndx;
+	}
+
+	pr_debug("%pS: changed=%d current idx=%d request client %s id:%u enable:%d refcount:%d\n",
+		__builtin_return_address(0), changed, max_usecase_ndx,
+		pclient->name, pclient->id, enable, pclient->refcount);
+
+	if (!changed)
+		goto end;
+
+	if (enable) {
+		dpu_power_event_trigger_locked(phandle,
+				DPU_POWER_EVENT_PRE_ENABLE);
+
+		for (i = 0; i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++) {
+			rc = dpu_power_data_bus_update(
+					&phandle->data_bus_handle[i], enable);
+			if (rc) {
+				pr_err("failed to set data bus vote id=%d rc=%d\n",
+						i, rc);
+				goto data_bus_hdl_err;
+			}
+		}
+
+		rc = dpu_power_reg_bus_update(phandle->reg_bus_hdl,
+							max_usecase_ndx);
+		if (rc) {
+			pr_err("failed to set reg bus vote rc=%d\n", rc);
+			goto reg_bus_hdl_err;
+		}
+
+		dpu_power_event_trigger_locked(phandle,
+				DPU_POWER_EVENT_POST_ENABLE);
+
+	} else {
+		dpu_power_event_trigger_locked(phandle,
+				DPU_POWER_EVENT_PRE_DISABLE);
+
+		dpu_power_reg_bus_update(phandle->reg_bus_hdl,
+							max_usecase_ndx);
+
+		for (i = 0 ; i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++)
+			dpu_power_data_bus_update(&phandle->data_bus_handle[i],
+					enable);
+
+		dpu_power_event_trigger_locked(phandle,
+				DPU_POWER_EVENT_POST_DISABLE);
+	}
+
+end:
+	mutex_unlock(&phandle->phandle_lock);
+	return rc;
+
+reg_bus_hdl_err:
+	for (i = 0 ; i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++)
+		dpu_power_data_bus_update(&phandle->data_bus_handle[i], 0);
+data_bus_hdl_err:
+	phandle->current_usecase_ndx = prev_usecase_ndx;
+	mutex_unlock(&phandle->phandle_lock);
+	return rc;
+}
+
+struct dpu_power_event *dpu_power_handle_register_event(
+		struct dpu_power_handle *phandle,
+		u32 event_type, void (*cb_fnc)(u32 event_type, void *usr),
+		void *usr, char *client_name)
+{
+	struct dpu_power_event *event;
+
+	if (!phandle) {
+		pr_err("invalid power handle\n");
+		return ERR_PTR(-EINVAL);
+	} else if (!cb_fnc || !event_type) {
+		pr_err("no callback fnc or event type\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	event = kzalloc(sizeof(struct dpu_power_event), GFP_KERNEL);
+	if (!event)
+		return ERR_PTR(-ENOMEM);
+
+	event->event_type = event_type;
+	event->cb_fnc = cb_fnc;
+	event->usr = usr;
+	strlcpy(event->client_name, client_name, MAX_CLIENT_NAME_LEN);
+	event->active = true;
+
+	mutex_lock(&phandle->phandle_lock);
+	list_add(&event->list, &phandle->event_list);
+	mutex_unlock(&phandle->phandle_lock);
+
+	return event;
+}
+
+void dpu_power_handle_unregister_event(
+		struct dpu_power_handle *phandle,
+		struct dpu_power_event *event)
+{
+	if (!phandle || !event) {
+		pr_err("invalid phandle or event\n");
+	} else if (!event->active) {
+		pr_err("power handle deinit already done\n");
+		kfree(event);
+	} else {
+		mutex_lock(&phandle->phandle_lock);
+		list_del_init(&event->list);
+		mutex_unlock(&phandle->phandle_lock);
+		kfree(event);
+	}
+}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.h
new file mode 100644
index 0000000..9a6d4b9
--- /dev/null
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_power_handle.h
@@ -0,0 +1,288 @@
+/* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _DPU_POWER_HANDLE_H_
+#define _DPU_POWER_HANDLE_H_
+
+#define MAX_CLIENT_NAME_LEN 128
+
+#define DPU_POWER_HANDLE_ENABLE_BUS_AB_QUOTA	0
+#define DPU_POWER_HANDLE_DISABLE_BUS_AB_QUOTA	0
+#define DPU_POWER_HANDLE_ENABLE_BUS_IB_QUOTA	1600000000
+#define DPU_POWER_HANDLE_DISABLE_BUS_IB_QUOTA	0
+
+#include <linux/dpu_io_util.h>
+
+/* event will be triggered before power handler disable */
+#define DPU_POWER_EVENT_PRE_DISABLE	0x1
+
+/* event will be triggered after power handler disable */
+#define DPU_POWER_EVENT_POST_DISABLE	0x2
+
+/* event will be triggered before power handler enable */
+#define DPU_POWER_EVENT_PRE_ENABLE	0x4
+
+/* event will be triggered after power handler enable */
+#define DPU_POWER_EVENT_POST_ENABLE	0x8
+
+/**
+ * mdss_bus_vote_type: register bus vote type
+ * VOTE_INDEX_DISABLE: removes the client vote
+ * VOTE_INDEX_LOW: keeps the lowest vote for register bus
+ * VOTE_INDEX_MAX: invalid
+ */
+enum mdss_bus_vote_type {
+	VOTE_INDEX_DISABLE,
+	VOTE_INDEX_LOW,
+	VOTE_INDEX_MAX,
+};
+
+/**
+ * enum dpu_power_handle_data_bus_client - type of axi bus clients
+ * @DPU_POWER_HANDLE_DATA_BUS_CLIENT_RT: core real-time bus client
+ * @DPU_POWER_HANDLE_DATA_BUS_CLIENT_NRT: core non-real-time bus client
+ * @DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX: maximum number of bus client type
+ */
+enum dpu_power_handle_data_bus_client {
+	DPU_POWER_HANDLE_DATA_BUS_CLIENT_RT,
+	DPU_POWER_HANDLE_DATA_BUS_CLIENT_NRT,
+	DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX
+};
+
+/**
+ * enum DPU_POWER_HANDLE_DBUS_ID - data bus identifier
+ * @DPU_POWER_HANDLE_DBUS_ID_MNOC: DPU/MNOC data bus
+ * @DPU_POWER_HANDLE_DBUS_ID_LLCC: MNOC/LLCC data bus
+ * @DPU_POWER_HANDLE_DBUS_ID_EBI: LLCC/EBI data bus
+ */
+enum DPU_POWER_HANDLE_DBUS_ID {
+	DPU_POWER_HANDLE_DBUS_ID_MNOC,
+	DPU_POWER_HANDLE_DBUS_ID_LLCC,
+	DPU_POWER_HANDLE_DBUS_ID_EBI,
+	DPU_POWER_HANDLE_DBUS_ID_MAX,
+};
+
+/**
+ * struct dpu_power_client: stores the power client for dpu driver
+ * @name:	name of the client
+ * @usecase_ndx: current regs bus vote type
+ * @refcount:	current refcount if multiple modules are using same
+ *              same client for enable/disable. Power module will
+ *              aggregate the refcount and vote accordingly for this
+ *              client.
+ * @id:		assigned during create. helps for debugging.
+ * @list:	list to attach power handle master list
+ * @ab:         arbitrated bandwidth for each bus client
+ * @ib:         instantaneous bandwidth for each bus client
+ * @active:	inidcates the state of dpu power handle
+ */
+struct dpu_power_client {
+	char name[MAX_CLIENT_NAME_LEN];
+	short usecase_ndx;
+	short refcount;
+	u32 id;
+	struct list_head list;
+	u64 ab[DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX];
+	u64 ib[DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX];
+	bool active;
+};
+
+/**
+ * struct dpu_power_data_handle: power handle struct for data bus
+ * @data_bus_scale_table: pointer to bus scaling table
+ * @data_bus_hdl: current data bus handle
+ * @axi_port_cnt: number of rt axi ports
+ * @nrt_axi_port_cnt: number of nrt axi ports
+ * @bus_channels: number of memory bus channels
+ * @curr_bw_uc_idx: current use case index of data bus
+ * @ao_bw_uc_idx: active only use case index of data bus
+ * @ab_rt: realtime ab quota
+ * @ib_rt: realtime ib quota
+ * @ab_nrt: non-realtime ab quota
+ * @ib_nrt: non-realtime ib quota
+ * @enable: true if bus is enabled
+ */
+struct dpu_power_data_bus_handle {
+	struct msm_bus_scale_pdata *data_bus_scale_table;
+	u32 data_bus_hdl;
+	u32 axi_port_cnt;
+	u32 nrt_axi_port_cnt;
+	u32 bus_channels;
+	u32 curr_bw_uc_idx;
+	u32 ao_bw_uc_idx;
+	u64 ab_rt;
+	u64 ib_rt;
+	u64 ab_nrt;
+	u64 ib_nrt;
+	bool enable;
+};
+
+/*
+ * struct dpu_power_event - local event registration structure
+ * @client_name: name of the client registering
+ * @cb_fnc: pointer to desired callback function
+ * @usr: user pointer to pass to callback event trigger
+ * @event: refer to DPU_POWER_HANDLE_EVENT_*
+ * @list: list to attach event master list
+ * @active: indicates the state of dpu power handle
+ */
+struct dpu_power_event {
+	char client_name[MAX_CLIENT_NAME_LEN];
+	void (*cb_fnc)(u32 event_type, void *usr);
+	void *usr;
+	u32 event_type;
+	struct list_head list;
+	bool active;
+};
+
+/**
+ * struct dpu_power_handle: power handle main struct
+ * @client_clist: master list to store all clients
+ * @phandle_lock: lock to synchronize the enable/disable
+ * @dev: pointer to device structure
+ * @usecase_ndx: current usecase index
+ * @reg_bus_hdl: current register bus handle
+ * @data_bus_handle: context structure for data bus control
+ * @event_list: current power handle event list
+ */
+struct dpu_power_handle {
+	struct list_head power_client_clist;
+	struct mutex phandle_lock;
+	struct device *dev;
+	u32 current_usecase_ndx;
+	u32 reg_bus_hdl;
+	struct dpu_power_data_bus_handle data_bus_handle
+		[DPU_POWER_HANDLE_DBUS_ID_MAX];
+	struct list_head event_list;
+};
+
+/**
+ * dpu_power_resource_init() - initializes the dpu power handle
+ * @pdev:   platform device to search the power resources
+ * @pdata:  power handle to store the power resources
+ *
+ * Return: error code.
+ */
+int dpu_power_resource_init(struct platform_device *pdev,
+	struct dpu_power_handle *pdata);
+
+/**
+ * dpu_power_resource_deinit() - release the dpu power handle
+ * @pdev:   platform device for power resources
+ * @pdata:  power handle containing the resources
+ *
+ * Return: error code.
+ */
+void dpu_power_resource_deinit(struct platform_device *pdev,
+	struct dpu_power_handle *pdata);
+
+/**
+ * dpu_power_client_create() - create the client on power handle
+ * @pdata:  power handle containing the resources
+ * @client_name: new client name for registration
+ *
+ * Return: error code.
+ */
+struct dpu_power_client *dpu_power_client_create(struct dpu_power_handle *pdata,
+	char *client_name);
+
+/**
+ * dpu_power_client_destroy() - destroy the client on power handle
+ * @pdata:  power handle containing the resources
+ * @client_name: new client name for registration
+ *
+ * Return: none
+ */
+void dpu_power_client_destroy(struct dpu_power_handle *phandle,
+	struct dpu_power_client *client);
+
+/**
+ * dpu_power_resource_enable() - enable/disable the power resources
+ * @pdata:  power handle containing the resources
+ * @client: client information to enable/disable its vote
+ * @enable: boolean request for enable/disable
+ *
+ * Return: error code.
+ */
+int dpu_power_resource_enable(struct dpu_power_handle *pdata,
+	struct dpu_power_client *pclient, bool enable);
+
+/**
+ * dpu_power_data_bus_state_update() - update data bus state
+ * @pdata:  power handle containing the resources
+ * @enable: take enable vs disable path
+ *
+ * Return: error code.
+ */
+int dpu_power_data_bus_state_update(struct dpu_power_handle *phandle,
+							bool enable);
+
+/**
+ * dpu_power_data_bus_set_quota() - set data bus quota for power client
+ * @phandle:  power handle containing the resources
+ * @client: client information to set quota
+ * @bus_client: real-time or non-real-time bus client
+ * @bus_id: identifier of data bus, see DPU_POWER_HANDLE_DBUS_ID
+ * @ab_quota: arbitrated bus bandwidth
+ * @ib_quota: instantaneous bus bandwidth
+ *
+ * Return: zero if success, or error code otherwise
+ */
+int dpu_power_data_bus_set_quota(struct dpu_power_handle *phandle,
+		struct dpu_power_client *pclient,
+		int bus_client, u32 bus_id,
+		u64 ab_quota, u64 ib_quota);
+
+/**
+ * dpu_power_data_bus_bandwidth_ctrl() - control data bus bandwidth enable
+ * @phandle:  power handle containing the resources
+ * @client: client information to bandwidth control
+ * @enable: true to enable bandwidth for data base
+ *
+ * Return: none
+ */
+void dpu_power_data_bus_bandwidth_ctrl(struct dpu_power_handle *phandle,
+		struct dpu_power_client *pclient, int enable);
+
+/**
+ * dpu_power_handle_register_event - register a callback function for an event.
+ *	Clients can register for multiple events with a single register.
+ *	Any block with access to phandle can register for the event
+ *	notification.
+ * @phandle:	power handle containing the resources
+ * @event_type:	event type to register; refer DPU_POWER_HANDLE_EVENT_*
+ * @cb_fnc:	pointer to desired callback function
+ * @usr:	user pointer to pass to callback on event trigger
+ *
+ * Return:	event pointer if success, or error code otherwise
+ */
+struct dpu_power_event *dpu_power_handle_register_event(
+		struct dpu_power_handle *phandle,
+		u32 event_type, void (*cb_fnc)(u32 event_type, void *usr),
+		void *usr, char *client_name);
+/**
+ * dpu_power_handle_unregister_event - unregister callback for event(s)
+ * @phandle:	power handle containing the resources
+ * @event:	event pointer returned after power handle register
+ */
+void dpu_power_handle_unregister_event(struct dpu_power_handle *phandle,
+		struct dpu_power_event *event);
+
+/**
+ * dpu_power_handle_get_dbus_name - get name of given data bus identifier
+ * @bus_id:	data bus identifier
+ * Return:	Pointer to name string if success; NULL otherwise
+ */
+const char *dpu_power_handle_get_dbus_name(u32 bus_id);
+
+#endif /* _DPU_POWER_HANDLE_H_ */
diff --git a/drivers/gpu/drm/msm/dpu_power_handle.c b/drivers/gpu/drm/msm/dpu_power_handle.c
deleted file mode 100644
index 77be106..0000000
--- a/drivers/gpu/drm/msm/dpu_power_handle.c
+++ /dev/null
@@ -1,693 +0,0 @@
-/* Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#define pr_fmt(fmt)	"[drm:%s:%d]: " fmt, __func__, __LINE__
-
-#include <linux/kernel.h>
-#include <linux/of.h>
-#include <linux/string.h>
-#include <linux/of_address.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <linux/of_platform.h>
-#ifdef CONFIG_QCOM_BUS_SCALING
-#include <linux/msm-bus.h>
-#include <linux/msm-bus-board.h>
-#endif
-#include <linux/dpu_io_util.h>
-
-#include "dpu_power_handle.h"
-#include "dpu_trace.h"
-
-static const char *data_bus_name[DPU_POWER_HANDLE_DBUS_ID_MAX] = {
-	[DPU_POWER_HANDLE_DBUS_ID_MNOC] = "qcom,dpu-data-bus",
-	[DPU_POWER_HANDLE_DBUS_ID_LLCC] = "qcom,dpu-llcc-bus",
-	[DPU_POWER_HANDLE_DBUS_ID_EBI] = "qcom,dpu-ebi-bus",
-};
-
-const char *dpu_power_handle_get_dbus_name(u32 bus_id)
-{
-	if (bus_id < DPU_POWER_HANDLE_DBUS_ID_MAX)
-		return data_bus_name[bus_id];
-
-	return NULL;
-}
-
-static void dpu_power_event_trigger_locked(struct dpu_power_handle *phandle,
-		u32 event_type)
-{
-	struct dpu_power_event *event;
-
-	list_for_each_entry(event, &phandle->event_list, list) {
-		if (event->event_type & event_type)
-			event->cb_fnc(event_type, event->usr);
-	}
-}
-
-struct dpu_power_client *dpu_power_client_create(
-	struct dpu_power_handle *phandle, char *client_name)
-{
-	struct dpu_power_client *client;
-	static u32 id;
-
-	if (!client_name || !phandle) {
-		pr_err("client name is null or invalid power data\n");
-		return ERR_PTR(-EINVAL);
-	}
-
-	client = kzalloc(sizeof(struct dpu_power_client), GFP_KERNEL);
-	if (!client)
-		return ERR_PTR(-ENOMEM);
-
-	mutex_lock(&phandle->phandle_lock);
-	strlcpy(client->name, client_name, MAX_CLIENT_NAME_LEN);
-	client->usecase_ndx = VOTE_INDEX_DISABLE;
-	client->id = id;
-	client->active = true;
-	pr_debug("client %s created:%pK id :%d\n", client_name,
-		client, id);
-	id++;
-	list_add(&client->list, &phandle->power_client_clist);
-	mutex_unlock(&phandle->phandle_lock);
-
-	return client;
-}
-
-void dpu_power_client_destroy(struct dpu_power_handle *phandle,
-	struct dpu_power_client *client)
-{
-	if (!client  || !phandle) {
-		pr_err("reg bus vote: invalid client handle\n");
-	} else if (!client->active) {
-		pr_err("dpu power deinit already done\n");
-		kfree(client);
-	} else {
-		pr_debug("bus vote client %s destroyed:%pK id:%u\n",
-			client->name, client, client->id);
-		mutex_lock(&phandle->phandle_lock);
-		list_del_init(&client->list);
-		mutex_unlock(&phandle->phandle_lock);
-		kfree(client);
-	}
-}
-
-#ifdef CONFIG_QCOM_BUS_SCALING
-
-#define MAX_AXI_PORT_COUNT 3
-
-static int _dpu_power_data_bus_set_quota(
-		struct dpu_power_data_bus_handle *pdbus,
-		u64 ab_quota_rt, u64 ab_quota_nrt,
-		u64 ib_quota_rt, u64 ib_quota_nrt)
-{
-	int new_uc_idx;
-	u64 ab_quota[MAX_AXI_PORT_COUNT] = {0, 0};
-	u64 ib_quota[MAX_AXI_PORT_COUNT] = {0, 0};
-	int rc;
-
-	if (pdbus->data_bus_hdl < 1) {
-		pr_err("invalid bus handle %d\n", pdbus->data_bus_hdl);
-		return -EINVAL;
-	}
-
-	pdbus->ab_rt = ab_quota_rt;
-	pdbus->ib_rt = ib_quota_rt;
-	pdbus->ab_nrt = ab_quota_nrt;
-	pdbus->ib_nrt = ib_quota_nrt;
-
-	if (pdbus->enable) {
-		ab_quota_rt = max_t(u64, ab_quota_rt,
-				DPU_POWER_HANDLE_ENABLE_BUS_AB_QUOTA);
-		ib_quota_rt = max_t(u64, ib_quota_rt,
-				DPU_POWER_HANDLE_ENABLE_BUS_IB_QUOTA);
-		ab_quota_nrt = max_t(u64, ab_quota_nrt,
-				DPU_POWER_HANDLE_ENABLE_BUS_AB_QUOTA);
-		ib_quota_nrt = max_t(u64, ib_quota_nrt,
-				DPU_POWER_HANDLE_ENABLE_BUS_IB_QUOTA);
-	} else {
-		ab_quota_rt = min_t(u64, ab_quota_rt,
-				DPU_POWER_HANDLE_DISABLE_BUS_AB_QUOTA);
-		ib_quota_rt = min_t(u64, ib_quota_rt,
-				DPU_POWER_HANDLE_DISABLE_BUS_IB_QUOTA);
-		ab_quota_nrt = min_t(u64, ab_quota_nrt,
-				DPU_POWER_HANDLE_DISABLE_BUS_AB_QUOTA);
-		ib_quota_nrt = min_t(u64, ib_quota_nrt,
-				DPU_POWER_HANDLE_DISABLE_BUS_IB_QUOTA);
-	}
-
-	if (!ab_quota_rt && !ab_quota_nrt && !ib_quota_rt && !ib_quota_nrt)  {
-		new_uc_idx = 0;
-	} else {
-		int i;
-		struct msm_bus_vectors *vect = NULL;
-		struct msm_bus_scale_pdata *bw_table =
-			pdbus->data_bus_scale_table;
-		u32 nrt_axi_port_cnt = pdbus->nrt_axi_port_cnt;
-		u32 total_axi_port_cnt = pdbus->axi_port_cnt;
-		u32 rt_axi_port_cnt = total_axi_port_cnt - nrt_axi_port_cnt;
-
-		if (!bw_table || !total_axi_port_cnt ||
-		    total_axi_port_cnt > MAX_AXI_PORT_COUNT) {
-			pr_err("invalid input\n");
-			return -EINVAL;
-		}
-
-		if (pdbus->bus_channels) {
-			ib_quota_rt = div_u64(ib_quota_rt,
-						pdbus->bus_channels);
-			ib_quota_nrt = div_u64(ib_quota_nrt,
-						pdbus->bus_channels);
-		}
-
-		if (nrt_axi_port_cnt) {
-
-			ab_quota_rt = div_u64(ab_quota_rt, rt_axi_port_cnt);
-			ab_quota_nrt = div_u64(ab_quota_nrt, nrt_axi_port_cnt);
-
-			for (i = 0; i < total_axi_port_cnt; i++) {
-				if (i < rt_axi_port_cnt) {
-					ab_quota[i] = ab_quota_rt;
-					ib_quota[i] = ib_quota_rt;
-				} else {
-					ab_quota[i] = ab_quota_nrt;
-					ib_quota[i] = ib_quota_nrt;
-				}
-			}
-		} else {
-			ab_quota[0] = div_u64(ab_quota_rt + ab_quota_nrt,
-					total_axi_port_cnt);
-			ib_quota[0] = ib_quota_rt + ib_quota_nrt;
-
-			for (i = 1; i < total_axi_port_cnt; i++) {
-				ab_quota[i] = ab_quota[0];
-				ib_quota[i] = ib_quota[0];
-			}
-		}
-
-		new_uc_idx = (pdbus->curr_bw_uc_idx %
-			(bw_table->num_usecases - 1)) + 1;
-
-		for (i = 0; i < total_axi_port_cnt; i++) {
-			vect = &bw_table->usecase[new_uc_idx].vectors[i];
-			vect->ab = ab_quota[i];
-			vect->ib = ib_quota[i];
-
-			pr_debug(
-				"%s uc_idx=%d %s path idx=%d ab=%llu ib=%llu\n",
-				bw_table->name,
-				new_uc_idx, (i < rt_axi_port_cnt) ? "rt" : "nrt"
-				, i, vect->ab, vect->ib);
-		}
-	}
-	pdbus->curr_bw_uc_idx = new_uc_idx;
-	pdbus->ao_bw_uc_idx = new_uc_idx;
-
-	DPU_ATRACE_BEGIN("msm_bus_scale_req");
-	rc = msm_bus_scale_client_update_request(pdbus->data_bus_hdl,
-			new_uc_idx);
-	DPU_ATRACE_END("msm_bus_scale_req");
-
-	return rc;
-}
-
-int dpu_power_data_bus_set_quota(struct dpu_power_handle *phandle,
-		struct dpu_power_client *pclient,
-		int bus_client, u32 bus_id,
-		u64 ab_quota, u64 ib_quota)
-{
-	int rc = 0;
-	int i;
-	u64 total_ab_rt = 0, total_ib_rt = 0;
-	u64 total_ab_nrt = 0, total_ib_nrt = 0;
-	struct dpu_power_client *client;
-
-	if (!phandle || !pclient ||
-			bus_client >= DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX ||
-			bus_id >= DPU_POWER_HANDLE_DBUS_ID_MAX) {
-		pr_err("invalid parameters\n");
-		return -EINVAL;
-	}
-
-	mutex_lock(&phandle->phandle_lock);
-
-	pclient->ab[bus_client] = ab_quota;
-	pclient->ib[bus_client] = ib_quota;
-	trace_dpu_perf_update_bus(bus_client, ab_quota, ib_quota);
-
-	list_for_each_entry(client, &phandle->power_client_clist, list) {
-		for (i = 0; i < DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX; i++) {
-			if (i == DPU_POWER_HANDLE_DATA_BUS_CLIENT_NRT) {
-				total_ab_nrt += client->ab[i];
-				total_ib_nrt += client->ib[i];
-			} else {
-				total_ab_rt += client->ab[i];
-				total_ib_rt = max(total_ib_rt, client->ib[i]);
-			}
-		}
-	}
-
-	if (phandle->data_bus_handle[bus_id].data_bus_hdl)
-		rc = _dpu_power_data_bus_set_quota(
-			&phandle->data_bus_handle[bus_id],
-			total_ab_rt, total_ab_nrt,
-			total_ib_rt, total_ib_nrt);
-
-	mutex_unlock(&phandle->phandle_lock);
-
-	return rc;
-}
-
-static void dpu_power_data_bus_unregister(
-		struct dpu_power_data_bus_handle *pdbus)
-{
-	if (pdbus->data_bus_hdl) {
-		msm_bus_scale_unregister_client(pdbus->data_bus_hdl);
-		pdbus->data_bus_hdl = 0;
-	}
-}
-
-static int dpu_power_data_bus_parse(struct platform_device *pdev,
-	struct dpu_power_data_bus_handle *pdbus, const char *name)
-{
-	struct device_node *node;
-	int rc = 0;
-	int paths;
-
-	pdbus->bus_channels = 1;
-	rc = of_property_read_u32(pdev->dev.of_node,
-		"qcom,dpu-dram-channels", &pdbus->bus_channels);
-	if (rc) {
-		pr_debug("number of channels property not specified\n");
-		rc = 0;
-	}
-
-	pdbus->nrt_axi_port_cnt = 0;
-	rc = of_property_read_u32(pdev->dev.of_node,
-			"qcom,dpu-num-nrt-paths",
-			&pdbus->nrt_axi_port_cnt);
-	if (rc) {
-		pr_debug("number of axi port property not specified\n");
-		rc = 0;
-	}
-
-	node = of_get_child_by_name(pdev->dev.of_node, name);
-	if (node) {
-		rc = of_property_read_u32(node,
-				"qcom,msm-bus,num-paths", &paths);
-		if (rc) {
-			pr_err("Error. qcom,msm-bus,num-paths not found\n");
-			return rc;
-		}
-		pdbus->axi_port_cnt = paths;
-
-		pdbus->data_bus_scale_table =
-				msm_bus_pdata_from_node(pdev, node);
-		if (IS_ERR_OR_NULL(pdbus->data_bus_scale_table)) {
-			pr_err("reg bus handle parsing failed\n");
-			rc = PTR_ERR(pdbus->data_bus_scale_table);
-			if (!pdbus->data_bus_scale_table)
-				rc = -EINVAL;
-			goto end;
-		}
-		pdbus->data_bus_hdl = msm_bus_scale_register_client(
-				pdbus->data_bus_scale_table);
-		if (!pdbus->data_bus_hdl) {
-			pr_err("data_bus_client register failed\n");
-			rc = -EINVAL;
-			goto end;
-		}
-		pr_debug("register %s data_bus_hdl=%x\n", name,
-				pdbus->data_bus_hdl);
-	}
-
-end:
-	return rc;
-}
-
-static int dpu_power_reg_bus_parse(struct platform_device *pdev,
-	struct dpu_power_handle *phandle)
-{
-	struct device_node *node;
-	struct msm_bus_scale_pdata *bus_scale_table;
-	int rc = 0;
-
-	node = of_get_child_by_name(pdev->dev.of_node, "qcom,dpu-reg-bus");
-	if (node) {
-		bus_scale_table = msm_bus_pdata_from_node(pdev, node);
-		if (IS_ERR_OR_NULL(bus_scale_table)) {
-			pr_err("reg bus handle parsing failed\n");
-			rc = PTR_ERR(bus_scale_table);
-			if (!bus_scale_table)
-				rc = -EINVAL;
-			goto end;
-		}
-		phandle->reg_bus_hdl = msm_bus_scale_register_client(
-			      bus_scale_table);
-		if (!phandle->reg_bus_hdl) {
-			pr_err("reg_bus_client register failed\n");
-			rc = -EINVAL;
-			goto end;
-		}
-		pr_debug("register reg_bus_hdl=%x\n", phandle->reg_bus_hdl);
-	}
-
-end:
-	return rc;
-}
-
-static void dpu_power_reg_bus_unregister(u32 reg_bus_hdl)
-{
-	if (reg_bus_hdl)
-		msm_bus_scale_unregister_client(reg_bus_hdl);
-}
-
-int dpu_power_data_bus_state_update(struct dpu_power_handle *phandle,
-							bool enable)
-{
-	int i;
-
-	if (!phandle) {
-		pr_err("invalid param\n");
-		return -EINVAL;
-	}
-
-	for (i = DPU_POWER_HANDLE_DBUS_ID_MNOC;
-			i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++)
-		phandle->data_bus_handle[i].enable = enable;
-
-	return 0;
-}
-
-static int dpu_power_data_bus_update(struct dpu_power_data_bus_handle *pdbus,
-							bool enable)
-{
-	int rc = 0;
-
-	pdbus->enable = enable;
-
-	if (pdbus->data_bus_hdl)
-		rc = _dpu_power_data_bus_set_quota(pdbus, pdbus->ab_rt,
-				pdbus->ab_nrt, pdbus->ib_rt, pdbus->ib_nrt);
-
-	if (rc)
-		pr_err("failed to set data bus vote rc=%d enable:%d\n",
-							rc, enable);
-
-	return rc;
-}
-
-static int dpu_power_reg_bus_update(u32 reg_bus_hdl, u32 usecase_ndx)
-{
-	int rc = 0;
-
-	if (reg_bus_hdl)
-		rc = msm_bus_scale_client_update_request(reg_bus_hdl,
-								usecase_ndx);
-	if (rc)
-		pr_err("failed to set reg bus vote rc=%d\n", rc);
-
-	return rc;
-}
-#else
-static int dpu_power_data_bus_parse(struct platform_device *pdev,
-		struct dpu_power_data_bus_handle *pdbus, const char *name)
-{
-	return 0;
-}
-
-static void dpu_power_data_bus_unregister(
-		struct dpu_power_data_bus_handle *pdbus)
-{
-}
-
-int dpu_power_data_bus_set_quota(struct dpu_power_handle *phandle,
-		struct dpu_power_client *pclient,
-		int bus_client, u32 bus_id,
-		u64 ab_quota, u64 ib_quota)
-{
-	return 0;
-}
-
-static int dpu_power_reg_bus_parse(struct platform_device *pdev,
-	struct dpu_power_handle *phandle)
-{
-	return 0;
-}
-
-static void dpu_power_reg_bus_unregister(u32 reg_bus_hdl)
-{
-}
-
-static int dpu_power_reg_bus_update(u32 reg_bus_hdl, u32 usecase_ndx)
-{
-	return 0;
-}
-
-static int dpu_power_data_bus_update(struct dpu_power_data_bus_handle *pdbus,
-							bool enable)
-{
-	return 0;
-}
-
-int dpu_power_data_bus_state_update(struct dpu_power_handle *phandle,
-							bool enable)
-{
-	return 0;
-}
-#endif
-
-int dpu_power_resource_init(struct platform_device *pdev,
-	struct dpu_power_handle *phandle)
-{
-	int rc = 0, i;
-
-	if (!phandle || !pdev) {
-		pr_err("invalid input param\n");
-		return -EINVAL;
-	}
-
-	phandle->dev = &pdev->dev;
-
-	rc = dpu_power_reg_bus_parse(pdev, phandle);
-	if (rc) {
-		pr_err("register bus parse failed rc=%d\n", rc);
-		return rc;
-	}
-
-	for (i = DPU_POWER_HANDLE_DBUS_ID_MNOC;
-			i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++) {
-		rc = dpu_power_data_bus_parse(pdev,
-				&phandle->data_bus_handle[i],
-				data_bus_name[i]);
-		if (rc) {
-			pr_err("register data bus parse failed id=%d rc=%d\n",
-					i, rc);
-			goto data_bus_err;
-		}
-	}
-
-	INIT_LIST_HEAD(&phandle->power_client_clist);
-	INIT_LIST_HEAD(&phandle->event_list);
-
-	mutex_init(&phandle->phandle_lock);
-
-	return rc;
-
-data_bus_err:
-	for (i--; i >= 0; i--)
-		dpu_power_data_bus_unregister(&phandle->data_bus_handle[i]);
-	dpu_power_reg_bus_unregister(phandle->reg_bus_hdl);
-	return rc;
-}
-
-void dpu_power_resource_deinit(struct platform_device *pdev,
-	struct dpu_power_handle *phandle)
-{
-	struct dpu_power_client *curr_client, *next_client;
-	struct dpu_power_event *curr_event, *next_event;
-	int i;
-
-	if (!phandle || !pdev) {
-		pr_err("invalid input param\n");
-		return;
-	}
-
-	mutex_lock(&phandle->phandle_lock);
-	list_for_each_entry_safe(curr_client, next_client,
-			&phandle->power_client_clist, list) {
-		pr_err("cliend:%s-%d still registered with refcount:%d\n",
-				curr_client->name, curr_client->id,
-				curr_client->refcount);
-		curr_client->active = false;
-		list_del(&curr_client->list);
-	}
-
-	list_for_each_entry_safe(curr_event, next_event,
-			&phandle->event_list, list) {
-		pr_err("event:%d, client:%s still registered\n",
-				curr_event->event_type,
-				curr_event->client_name);
-		curr_event->active = false;
-		list_del(&curr_event->list);
-	}
-	mutex_unlock(&phandle->phandle_lock);
-
-	for (i = 0; i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++)
-		dpu_power_data_bus_unregister(&phandle->data_bus_handle[i]);
-
-	dpu_power_reg_bus_unregister(phandle->reg_bus_hdl);
-}
-
-int dpu_power_resource_enable(struct dpu_power_handle *phandle,
-	struct dpu_power_client *pclient, bool enable)
-{
-	int rc = 0, i;
-	bool changed = false;
-	u32 max_usecase_ndx = VOTE_INDEX_DISABLE, prev_usecase_ndx;
-	struct dpu_power_client *client;
-
-	if (!phandle || !pclient) {
-		pr_err("invalid input argument\n");
-		return -EINVAL;
-	}
-
-	mutex_lock(&phandle->phandle_lock);
-	if (enable)
-		pclient->refcount++;
-	else if (pclient->refcount)
-		pclient->refcount--;
-
-	if (pclient->refcount)
-		pclient->usecase_ndx = VOTE_INDEX_LOW;
-	else
-		pclient->usecase_ndx = VOTE_INDEX_DISABLE;
-
-	list_for_each_entry(client, &phandle->power_client_clist, list) {
-		if (client->usecase_ndx < VOTE_INDEX_MAX &&
-		    client->usecase_ndx > max_usecase_ndx)
-			max_usecase_ndx = client->usecase_ndx;
-	}
-
-	if (phandle->current_usecase_ndx != max_usecase_ndx) {
-		changed = true;
-		prev_usecase_ndx = phandle->current_usecase_ndx;
-		phandle->current_usecase_ndx = max_usecase_ndx;
-	}
-
-	pr_debug("%pS: changed=%d current idx=%d request client %s id:%u enable:%d refcount:%d\n",
-		__builtin_return_address(0), changed, max_usecase_ndx,
-		pclient->name, pclient->id, enable, pclient->refcount);
-
-	if (!changed)
-		goto end;
-
-	if (enable) {
-		dpu_power_event_trigger_locked(phandle,
-				DPU_POWER_EVENT_PRE_ENABLE);
-
-		for (i = 0; i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++) {
-			rc = dpu_power_data_bus_update(
-					&phandle->data_bus_handle[i], enable);
-			if (rc) {
-				pr_err("failed to set data bus vote id=%d rc=%d\n",
-						i, rc);
-				goto data_bus_hdl_err;
-			}
-		}
-
-		rc = dpu_power_reg_bus_update(phandle->reg_bus_hdl,
-							max_usecase_ndx);
-		if (rc) {
-			pr_err("failed to set reg bus vote rc=%d\n", rc);
-			goto reg_bus_hdl_err;
-		}
-
-		dpu_power_event_trigger_locked(phandle,
-				DPU_POWER_EVENT_POST_ENABLE);
-
-	} else {
-		dpu_power_event_trigger_locked(phandle,
-				DPU_POWER_EVENT_PRE_DISABLE);
-
-		dpu_power_reg_bus_update(phandle->reg_bus_hdl,
-							max_usecase_ndx);
-
-		for (i = 0 ; i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++)
-			dpu_power_data_bus_update(&phandle->data_bus_handle[i],
-					enable);
-
-		dpu_power_event_trigger_locked(phandle,
-				DPU_POWER_EVENT_POST_DISABLE);
-	}
-
-end:
-	mutex_unlock(&phandle->phandle_lock);
-	return rc;
-
-reg_bus_hdl_err:
-	for (i = 0 ; i < DPU_POWER_HANDLE_DBUS_ID_MAX; i++)
-		dpu_power_data_bus_update(&phandle->data_bus_handle[i], 0);
-data_bus_hdl_err:
-	phandle->current_usecase_ndx = prev_usecase_ndx;
-	mutex_unlock(&phandle->phandle_lock);
-	return rc;
-}
-
-struct dpu_power_event *dpu_power_handle_register_event(
-		struct dpu_power_handle *phandle,
-		u32 event_type, void (*cb_fnc)(u32 event_type, void *usr),
-		void *usr, char *client_name)
-{
-	struct dpu_power_event *event;
-
-	if (!phandle) {
-		pr_err("invalid power handle\n");
-		return ERR_PTR(-EINVAL);
-	} else if (!cb_fnc || !event_type) {
-		pr_err("no callback fnc or event type\n");
-		return ERR_PTR(-EINVAL);
-	}
-
-	event = kzalloc(sizeof(struct dpu_power_event), GFP_KERNEL);
-	if (!event)
-		return ERR_PTR(-ENOMEM);
-
-	event->event_type = event_type;
-	event->cb_fnc = cb_fnc;
-	event->usr = usr;
-	strlcpy(event->client_name, client_name, MAX_CLIENT_NAME_LEN);
-	event->active = true;
-
-	mutex_lock(&phandle->phandle_lock);
-	list_add(&event->list, &phandle->event_list);
-	mutex_unlock(&phandle->phandle_lock);
-
-	return event;
-}
-
-void dpu_power_handle_unregister_event(
-		struct dpu_power_handle *phandle,
-		struct dpu_power_event *event)
-{
-	if (!phandle || !event) {
-		pr_err("invalid phandle or event\n");
-	} else if (!event->active) {
-		pr_err("power handle deinit already done\n");
-		kfree(event);
-	} else {
-		mutex_lock(&phandle->phandle_lock);
-		list_del_init(&event->list);
-		mutex_unlock(&phandle->phandle_lock);
-		kfree(event);
-	}
-}
diff --git a/drivers/gpu/drm/msm/dpu_power_handle.h b/drivers/gpu/drm/msm/dpu_power_handle.h
deleted file mode 100644
index 9a6d4b9..0000000
--- a/drivers/gpu/drm/msm/dpu_power_handle.h
+++ /dev/null
@@ -1,288 +0,0 @@
-/* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _DPU_POWER_HANDLE_H_
-#define _DPU_POWER_HANDLE_H_
-
-#define MAX_CLIENT_NAME_LEN 128
-
-#define DPU_POWER_HANDLE_ENABLE_BUS_AB_QUOTA	0
-#define DPU_POWER_HANDLE_DISABLE_BUS_AB_QUOTA	0
-#define DPU_POWER_HANDLE_ENABLE_BUS_IB_QUOTA	1600000000
-#define DPU_POWER_HANDLE_DISABLE_BUS_IB_QUOTA	0
-
-#include <linux/dpu_io_util.h>
-
-/* event will be triggered before power handler disable */
-#define DPU_POWER_EVENT_PRE_DISABLE	0x1
-
-/* event will be triggered after power handler disable */
-#define DPU_POWER_EVENT_POST_DISABLE	0x2
-
-/* event will be triggered before power handler enable */
-#define DPU_POWER_EVENT_PRE_ENABLE	0x4
-
-/* event will be triggered after power handler enable */
-#define DPU_POWER_EVENT_POST_ENABLE	0x8
-
-/**
- * mdss_bus_vote_type: register bus vote type
- * VOTE_INDEX_DISABLE: removes the client vote
- * VOTE_INDEX_LOW: keeps the lowest vote for register bus
- * VOTE_INDEX_MAX: invalid
- */
-enum mdss_bus_vote_type {
-	VOTE_INDEX_DISABLE,
-	VOTE_INDEX_LOW,
-	VOTE_INDEX_MAX,
-};
-
-/**
- * enum dpu_power_handle_data_bus_client - type of axi bus clients
- * @DPU_POWER_HANDLE_DATA_BUS_CLIENT_RT: core real-time bus client
- * @DPU_POWER_HANDLE_DATA_BUS_CLIENT_NRT: core non-real-time bus client
- * @DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX: maximum number of bus client type
- */
-enum dpu_power_handle_data_bus_client {
-	DPU_POWER_HANDLE_DATA_BUS_CLIENT_RT,
-	DPU_POWER_HANDLE_DATA_BUS_CLIENT_NRT,
-	DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX
-};
-
-/**
- * enum DPU_POWER_HANDLE_DBUS_ID - data bus identifier
- * @DPU_POWER_HANDLE_DBUS_ID_MNOC: DPU/MNOC data bus
- * @DPU_POWER_HANDLE_DBUS_ID_LLCC: MNOC/LLCC data bus
- * @DPU_POWER_HANDLE_DBUS_ID_EBI: LLCC/EBI data bus
- */
-enum DPU_POWER_HANDLE_DBUS_ID {
-	DPU_POWER_HANDLE_DBUS_ID_MNOC,
-	DPU_POWER_HANDLE_DBUS_ID_LLCC,
-	DPU_POWER_HANDLE_DBUS_ID_EBI,
-	DPU_POWER_HANDLE_DBUS_ID_MAX,
-};
-
-/**
- * struct dpu_power_client: stores the power client for dpu driver
- * @name:	name of the client
- * @usecase_ndx: current regs bus vote type
- * @refcount:	current refcount if multiple modules are using same
- *              same client for enable/disable. Power module will
- *              aggregate the refcount and vote accordingly for this
- *              client.
- * @id:		assigned during create. helps for debugging.
- * @list:	list to attach power handle master list
- * @ab:         arbitrated bandwidth for each bus client
- * @ib:         instantaneous bandwidth for each bus client
- * @active:	inidcates the state of dpu power handle
- */
-struct dpu_power_client {
-	char name[MAX_CLIENT_NAME_LEN];
-	short usecase_ndx;
-	short refcount;
-	u32 id;
-	struct list_head list;
-	u64 ab[DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX];
-	u64 ib[DPU_POWER_HANDLE_DATA_BUS_CLIENT_MAX];
-	bool active;
-};
-
-/**
- * struct dpu_power_data_handle: power handle struct for data bus
- * @data_bus_scale_table: pointer to bus scaling table
- * @data_bus_hdl: current data bus handle
- * @axi_port_cnt: number of rt axi ports
- * @nrt_axi_port_cnt: number of nrt axi ports
- * @bus_channels: number of memory bus channels
- * @curr_bw_uc_idx: current use case index of data bus
- * @ao_bw_uc_idx: active only use case index of data bus
- * @ab_rt: realtime ab quota
- * @ib_rt: realtime ib quota
- * @ab_nrt: non-realtime ab quota
- * @ib_nrt: non-realtime ib quota
- * @enable: true if bus is enabled
- */
-struct dpu_power_data_bus_handle {
-	struct msm_bus_scale_pdata *data_bus_scale_table;
-	u32 data_bus_hdl;
-	u32 axi_port_cnt;
-	u32 nrt_axi_port_cnt;
-	u32 bus_channels;
-	u32 curr_bw_uc_idx;
-	u32 ao_bw_uc_idx;
-	u64 ab_rt;
-	u64 ib_rt;
-	u64 ab_nrt;
-	u64 ib_nrt;
-	bool enable;
-};
-
-/*
- * struct dpu_power_event - local event registration structure
- * @client_name: name of the client registering
- * @cb_fnc: pointer to desired callback function
- * @usr: user pointer to pass to callback event trigger
- * @event: refer to DPU_POWER_HANDLE_EVENT_*
- * @list: list to attach event master list
- * @active: indicates the state of dpu power handle
- */
-struct dpu_power_event {
-	char client_name[MAX_CLIENT_NAME_LEN];
-	void (*cb_fnc)(u32 event_type, void *usr);
-	void *usr;
-	u32 event_type;
-	struct list_head list;
-	bool active;
-};
-
-/**
- * struct dpu_power_handle: power handle main struct
- * @client_clist: master list to store all clients
- * @phandle_lock: lock to synchronize the enable/disable
- * @dev: pointer to device structure
- * @usecase_ndx: current usecase index
- * @reg_bus_hdl: current register bus handle
- * @data_bus_handle: context structure for data bus control
- * @event_list: current power handle event list
- */
-struct dpu_power_handle {
-	struct list_head power_client_clist;
-	struct mutex phandle_lock;
-	struct device *dev;
-	u32 current_usecase_ndx;
-	u32 reg_bus_hdl;
-	struct dpu_power_data_bus_handle data_bus_handle
-		[DPU_POWER_HANDLE_DBUS_ID_MAX];
-	struct list_head event_list;
-};
-
-/**
- * dpu_power_resource_init() - initializes the dpu power handle
- * @pdev:   platform device to search the power resources
- * @pdata:  power handle to store the power resources
- *
- * Return: error code.
- */
-int dpu_power_resource_init(struct platform_device *pdev,
-	struct dpu_power_handle *pdata);
-
-/**
- * dpu_power_resource_deinit() - release the dpu power handle
- * @pdev:   platform device for power resources
- * @pdata:  power handle containing the resources
- *
- * Return: error code.
- */
-void dpu_power_resource_deinit(struct platform_device *pdev,
-	struct dpu_power_handle *pdata);
-
-/**
- * dpu_power_client_create() - create the client on power handle
- * @pdata:  power handle containing the resources
- * @client_name: new client name for registration
- *
- * Return: error code.
- */
-struct dpu_power_client *dpu_power_client_create(struct dpu_power_handle *pdata,
-	char *client_name);
-
-/**
- * dpu_power_client_destroy() - destroy the client on power handle
- * @pdata:  power handle containing the resources
- * @client_name: new client name for registration
- *
- * Return: none
- */
-void dpu_power_client_destroy(struct dpu_power_handle *phandle,
-	struct dpu_power_client *client);
-
-/**
- * dpu_power_resource_enable() - enable/disable the power resources
- * @pdata:  power handle containing the resources
- * @client: client information to enable/disable its vote
- * @enable: boolean request for enable/disable
- *
- * Return: error code.
- */
-int dpu_power_resource_enable(struct dpu_power_handle *pdata,
-	struct dpu_power_client *pclient, bool enable);
-
-/**
- * dpu_power_data_bus_state_update() - update data bus state
- * @pdata:  power handle containing the resources
- * @enable: take enable vs disable path
- *
- * Return: error code.
- */
-int dpu_power_data_bus_state_update(struct dpu_power_handle *phandle,
-							bool enable);
-
-/**
- * dpu_power_data_bus_set_quota() - set data bus quota for power client
- * @phandle:  power handle containing the resources
- * @client: client information to set quota
- * @bus_client: real-time or non-real-time bus client
- * @bus_id: identifier of data bus, see DPU_POWER_HANDLE_DBUS_ID
- * @ab_quota: arbitrated bus bandwidth
- * @ib_quota: instantaneous bus bandwidth
- *
- * Return: zero if success, or error code otherwise
- */
-int dpu_power_data_bus_set_quota(struct dpu_power_handle *phandle,
-		struct dpu_power_client *pclient,
-		int bus_client, u32 bus_id,
-		u64 ab_quota, u64 ib_quota);
-
-/**
- * dpu_power_data_bus_bandwidth_ctrl() - control data bus bandwidth enable
- * @phandle:  power handle containing the resources
- * @client: client information to bandwidth control
- * @enable: true to enable bandwidth for data base
- *
- * Return: none
- */
-void dpu_power_data_bus_bandwidth_ctrl(struct dpu_power_handle *phandle,
-		struct dpu_power_client *pclient, int enable);
-
-/**
- * dpu_power_handle_register_event - register a callback function for an event.
- *	Clients can register for multiple events with a single register.
- *	Any block with access to phandle can register for the event
- *	notification.
- * @phandle:	power handle containing the resources
- * @event_type:	event type to register; refer DPU_POWER_HANDLE_EVENT_*
- * @cb_fnc:	pointer to desired callback function
- * @usr:	user pointer to pass to callback on event trigger
- *
- * Return:	event pointer if success, or error code otherwise
- */
-struct dpu_power_event *dpu_power_handle_register_event(
-		struct dpu_power_handle *phandle,
-		u32 event_type, void (*cb_fnc)(u32 event_type, void *usr),
-		void *usr, char *client_name);
-/**
- * dpu_power_handle_unregister_event - unregister callback for event(s)
- * @phandle:	power handle containing the resources
- * @event:	event pointer returned after power handle register
- */
-void dpu_power_handle_unregister_event(struct dpu_power_handle *phandle,
-		struct dpu_power_event *event);
-
-/**
- * dpu_power_handle_get_dbus_name - get name of given data bus identifier
- * @bus_id:	data bus identifier
- * Return:	Pointer to name string if success; NULL otherwise
- */
-const char *dpu_power_handle_get_dbus_name(u32 bus_id);
-
-#endif /* _DPU_POWER_HANDLE_H_ */
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 5c267cd..60b6919 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -340,7 +340,6 @@ static int msm_drm_uninit(struct device *dev)
 	component_unbind_all(dev, ddev);
 
 #ifdef CONFIG_DRM_MSM_DPU
-	dpu_power_resource_deinit(pdev, &priv->phandle);
 	dpu_dbg_destroy();
 #endif
 
@@ -519,12 +518,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 	drm_mode_config_init(ddev);
 
 #ifdef CONFIG_DRM_MSM_DPU
-	ret = dpu_power_resource_init(pdev, &priv->phandle);
-	if (ret) {
-		pr_err("dpu power resource init failed\n");
-		goto power_init_fail;
-	}
-
 	ret = dpu_dbg_init(&pdev->dev);
 	if (ret) {
 		dev_err(dev, "failed to init dpu dbg: %d\n", ret);
@@ -733,8 +726,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 #ifdef CONFIG_DRM_MSM_DPU
 	dpu_dbg_destroy();
 dbg_init_fail:
-	dpu_power_resource_deinit(pdev, &priv->phandle);
-power_init_fail:
 #endif
 	if (mdss && mdss->funcs)
 		mdss->funcs->destroy(ddev);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index f9ae96f..27a73a8 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -46,8 +46,6 @@
 #include <drm/msm_drm.h>
 #include <drm/drm_gem.h>
 
-#include "dpu_power_handle.h"
-
 #define GET_MAJOR_REV(rev)		((rev) >> 28)
 #define GET_MINOR_REV(rev)		(((rev) >> 16) & 0xFFF)
 #define GET_STEP_REV(rev)		((rev) & 0xFFFF)
@@ -375,8 +373,6 @@ struct msm_drm_private {
 
 	struct msm_kms *kms;
 
-	struct dpu_power_handle phandle;
-
 	/* subordinate devices, if present: */
 	struct platform_device *gpu_pdev;
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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