[DPU PATCH v2 07/12] drm/msm/dpu: remove clock management code from dpu_power_handle

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

MDSS and dpu drivers manage their respective clocks via
runtime_pm. Remove custom clock management code from
dpu_power_handle.

Also dpu core clock management code is restricted to
dpu_core_perf module.

Changes in v2:
	- remove local variable to hold and return error code
	  in _dpu_core_perf_set_core_clk_rate() instead return
	  retcode directly from msm_dss_clk_set_rate() call (Sean Paul)
	- dpu_core_perf_init() is called from dpu_kms_hw_init() and
	  most of the params passed are already validated so remove
	  redundant checks from dpu_core_perf_init() (Sean Paul)
	- return &mp->clk_config[i] directly to avoid local variable
	  in _dpu_kms_get_clk() (Sean Paul)
	- invert conditional check to eliminate local rate variable
	  from dpu_kms_get_clk_rate() (Sean Paul)
	- remove end label from dpu_power_resource_init() and return
	  directly on dpu_power_parse_dt_supply() failure as no cleanup
	  is needed (Sean Paul)
	- remove checks for vtotal and vrefresh from
 	  dpu_encoder_phys_cmd_tearcheck_config() as they should be
	  valid in mode_set call (Sean Paul)

Signed-off-by: Rajesh Yadav <ryadav@codeaurora.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c      |  41 ++---
 drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h      |   8 +-
 .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c   |   9 +-
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c            |  28 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h            |   9 +
 drivers/gpu/drm/msm/dpu_power_handle.c             | 196 +--------------------
 drivers/gpu/drm/msm/dpu_power_handle.h             |  40 -----
 7 files changed, 63 insertions(+), 268 deletions(-)

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 981f77f..5b79077 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
@@ -365,6 +365,17 @@ void dpu_core_perf_crtc_release_bw(struct drm_crtc *crtc)
 	}
 }
 
+static int _dpu_core_perf_set_core_clk_rate(struct dpu_kms *kms, u64 rate)
+{
+	struct dss_clk *core_clk = kms->perf.core_clk;
+
+	if (core_clk->max_rate && (rate > core_clk->max_rate))
+		rate = core_clk->max_rate;
+
+	core_clk->rate = rate;
+	return msm_dss_clk_set_rate(core_clk, 1);
+}
+
 static u64 _dpu_core_perf_get_core_clk_rate(struct dpu_kms *kms)
 {
 	u64 clk_rate = kms->perf.perf_tune.min_core_clk;
@@ -376,7 +387,8 @@ static u64 _dpu_core_perf_get_core_clk_rate(struct dpu_kms *kms)
 			dpu_cstate = to_dpu_crtc_state(crtc->state);
 			clk_rate = max(dpu_cstate->new_perf.core_clk_rate,
 							clk_rate);
-			clk_rate = clk_round_rate(kms->perf.core_clk, clk_rate);
+			clk_rate = clk_round_rate(kms->perf.core_clk->clk,
+					clk_rate);
 		}
 	}
 
@@ -484,15 +496,11 @@ void dpu_core_perf_crtc_update(struct drm_crtc *crtc,
 
 		DPU_EVT32(kms->dev, stop_req, clk_rate);
 
-		/* Temp change to avoid crash in clk_set_rate API. */
-#ifdef QCOM_DPU_SET_CLK
-		if (dpu_power_clk_set_rate(&priv->phandle,
-					   kms->perf.clk_name, clk_rate)) {
+		if (_dpu_core_perf_set_core_clk_rate(kms, clk_rate)) {
 			DPU_ERROR("failed to set %s clock rate %llu\n",
-					kms->perf.clk_name, clk_rate);
+					kms->perf.core_clk->clk_name, clk_rate);
 			return;
 		}
-#endif
 
 		kms->perf.core_clk_rate = clk_rate;
 		DPU_DEBUG("update clk rate = %lld HZ\n", clk_rate);
@@ -656,7 +664,6 @@ void dpu_core_perf_destroy(struct dpu_core_perf *perf)
 	dpu_core_perf_debugfs_destroy(perf);
 	perf->max_core_clk_rate = 0;
 	perf->core_clk = NULL;
-	perf->clk_name = NULL;
 	perf->phandle = NULL;
 	perf->catalog = NULL;
 	perf->dev = NULL;
@@ -667,9 +674,9 @@ int dpu_core_perf_init(struct dpu_core_perf *perf,
 		struct dpu_mdss_cfg *catalog,
 		struct dpu_power_handle *phandle,
 		struct dpu_power_client *pclient,
-		char *clk_name)
+		struct dss_clk *core_clk)
 {
-	if (!perf || !dev || !catalog || !phandle || !pclient || !clk_name) {
+	if (!pclient) {
 		DPU_ERROR("invalid parameters\n");
 		return -EINVAL;
 	}
@@ -678,23 +685,13 @@ int dpu_core_perf_init(struct dpu_core_perf *perf,
 	perf->catalog = catalog;
 	perf->phandle = phandle;
 	perf->pclient = pclient;
-	perf->clk_name = clk_name;
-
-	perf->core_clk = dpu_power_clk_get_clk(phandle, clk_name);
-	if (!perf->core_clk) {
-		DPU_ERROR("invalid core clk\n");
-		goto err;
-	}
+	perf->core_clk = core_clk;
 
-	perf->max_core_clk_rate = dpu_power_clk_get_max_rate(phandle, clk_name);
+	perf->max_core_clk_rate = core_clk->max_rate;
 	if (!perf->max_core_clk_rate) {
 		DPU_DEBUG("optional max core clk rate, use default\n");
 		perf->max_core_clk_rate = DPU_PERF_DEFAULT_MAX_CORE_CLK_RATE;
 	}
 
 	return 0;
-
-err:
-	dpu_core_perf_destroy(perf);
-	return -ENODEV;
 }
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
index 1965ff5..9c1a719 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
@@ -54,7 +54,6 @@ struct dpu_core_perf_tune {
  * @catalog: Pointer to catalog configuration
  * @phandle: Pointer to power handler
  * @pclient: Pointer to power client
- * @clk_name: core clock name
  * @core_clk: Pointer to core clock structure
  * @core_clk_rate: current core clock rate
  * @max_core_clk_rate: maximum allowable core clock rate
@@ -70,8 +69,7 @@ struct dpu_core_perf {
 	struct dpu_mdss_cfg *catalog;
 	struct dpu_power_handle *phandle;
 	struct dpu_power_client *pclient;
-	char *clk_name;
-	struct clk *core_clk;
+	struct dss_clk *core_clk;
 	u64 core_clk_rate;
 	u64 max_core_clk_rate;
 	struct dpu_core_perf_tune perf_tune;
@@ -118,14 +116,14 @@ void dpu_core_perf_crtc_update(struct drm_crtc *crtc,
  * @catalog: Pointer to catalog
  * @phandle: Pointer to power handle
  * @pclient: Pointer to power client
- * @clk_name: core clock name
+ * @core_clk: pointer to core clock
  */
 int dpu_core_perf_init(struct dpu_core_perf *perf,
 		struct drm_device *dev,
 		struct dpu_mdss_cfg *catalog,
 		struct dpu_power_handle *phandle,
 		struct dpu_power_client *pclient,
-		char *clk_name);
+		struct dss_clk *core_clk);
 
 /**
  * dpu_core_perf_debugfs_init - initialize debugfs for core performance context
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
index 072939c..388de38 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
@@ -428,11 +428,10 @@ static void dpu_encoder_phys_cmd_tearcheck_config(
 	 * vsync_count is ratio of MDP VSYNC clock frequency to LCD panel
 	 * frequency divided by the no. of rows (lines) in the LCDpanel.
 	 */
-	vsync_hz = dpu_power_clk_get_rate(&priv->phandle, "vsync_clk");
-	if (!vsync_hz || !mode->vtotal || !mode->vrefresh) {
-		DPU_DEBUG_CMDENC(cmd_enc,
-			"invalid params - vsync_hz %u vtot %u vrefresh %u\n",
-			vsync_hz, mode->vtotal, mode->vrefresh);
+	vsync_hz = dpu_kms_get_clk_rate(dpu_kms, "vsync_clk");
+	if (vsync_hz <= 0) {
+		DPU_DEBUG_CMDENC(cmd_enc, "invalid - vsync_hz %u\n",
+				 vsync_hz);
 		return;
 	}
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index cda4d12..349bda5 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1499,6 +1499,31 @@ static int _dpu_kms_mmu_init(struct dpu_kms *dpu_kms)
 	return ret;
 }
 
+static struct dss_clk *_dpu_kms_get_clk(struct dpu_kms *dpu_kms,
+		char *clock_name)
+{
+	struct dss_module_power *mp = &dpu_kms->mp;
+	int i;
+
+	for (i = 0; i < mp->num_clk; i++) {
+		if (!strcmp(mp->clk_config[i].clk_name, clock_name))
+			return &mp->clk_config[i];
+	}
+
+	return NULL;
+}
+
+u64 dpu_kms_get_clk_rate(struct dpu_kms *dpu_kms, char *clock_name)
+{
+	struct dss_clk *clk;
+
+	clk = _dpu_kms_get_clk(dpu_kms, clock_name);
+	if (!clk)
+		return -EINVAL;
+
+	return clk_get_rate(clk->clk);
+}
+
 static void dpu_kms_handle_power_event(u32 event_type, void *usr)
 {
 	struct dpu_kms *dpu_kms = usr;
@@ -1696,7 +1721,8 @@ 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, priv->pclient, "core_clk");
+			&priv->phandle, priv->pclient,
+			_dpu_kms_get_clk(dpu_kms, "core_clk"));
 	if (rc) {
 		DPU_ERROR("failed to init perf %d\n", rc);
 		goto perf_err;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
index 3c69921..a8255fe 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
@@ -537,4 +537,13 @@ struct dpu_kms_fbo *dpu_kms_fbo_alloc(struct drm_device *dev,
 
 void dpu_kms_encoder_enable(struct drm_encoder *encoder);
 
+/**
+ * dpu_kms_get_clk_rate() - get the clock rate
+ * @dpu_kms:  poiner to dpu_kms structure
+ * @clock_name: clock name to get the rate
+ *
+ * Return: current clock rate
+ */
+u64 dpu_kms_get_clk_rate(struct dpu_kms *dpu_kms, char *clock_name);
+
 #endif /* __dpu_kms_H__ */
diff --git a/drivers/gpu/drm/msm/dpu_power_handle.c b/drivers/gpu/drm/msm/dpu_power_handle.c
index e9e344a..12602ae 100644
--- a/drivers/gpu/drm/msm/dpu_power_handle.c
+++ b/drivers/gpu/drm/msm/dpu_power_handle.c
@@ -13,7 +13,6 @@
 
 #define pr_fmt(fmt)	"[drm:%s:%d]: " fmt, __func__, __LINE__
 
-#include <linux/clk.h>
 #include <linux/kernel.h>
 #include <linux/of.h>
 #include <linux/string.h>
@@ -246,62 +245,6 @@ static int dpu_power_parse_dt_supply(struct platform_device *pdev,
 	return rc;
 }
 
-static int dpu_power_parse_dt_clock(struct platform_device *pdev,
-					struct dss_module_power *mp)
-{
-	u32 i = 0, rc = 0;
-	const char *clock_name;
-	u32 clock_rate = 0;
-	u32 clock_max_rate = 0;
-	int num_clk = 0;
-
-	if (!pdev || !mp) {
-		pr_err("invalid input param pdev:%pK mp:%pK\n", pdev, mp);
-		return -EINVAL;
-	}
-
-	mp->num_clk = 0;
-	num_clk = of_property_count_strings(pdev->dev.of_node,
-							"clock-names");
-	if (num_clk <= 0) {
-		pr_debug("clocks are not defined\n");
-		goto clk_err;
-	}
-
-	mp->num_clk = num_clk;
-	mp->clk_config = devm_kzalloc(&pdev->dev,
-			sizeof(struct dss_clk) * num_clk, GFP_KERNEL);
-	if (!mp->clk_config) {
-		rc = -ENOMEM;
-		mp->num_clk = 0;
-		goto clk_err;
-	}
-
-	for (i = 0; i < num_clk; i++) {
-		of_property_read_string_index(pdev->dev.of_node, "clock-names",
-							i, &clock_name);
-		strlcpy(mp->clk_config[i].clk_name, clock_name,
-				sizeof(mp->clk_config[i].clk_name));
-
-		of_property_read_u32_index(pdev->dev.of_node, "clock-rate",
-							i, &clock_rate);
-		mp->clk_config[i].rate = clock_rate;
-
-		if (!clock_rate)
-			mp->clk_config[i].type = DSS_CLK_AHB;
-		else
-			mp->clk_config[i].type = DSS_CLK_PCLK;
-
-		clock_max_rate = 0;
-		of_property_read_u32_index(pdev->dev.of_node, "clock-max-rate",
-							i, &clock_max_rate);
-		mp->clk_config[i].max_rate = clock_max_rate;
-	}
-
-clk_err:
-	return rc;
-}
-
 #ifdef CONFIG_QCOM_BUS_SCALING
 
 #define MAX_AXI_PORT_COUNT 3
@@ -681,16 +624,10 @@ int dpu_power_resource_init(struct platform_device *pdev,
 	mp = &phandle->mp;
 	phandle->dev = &pdev->dev;
 
-	rc = dpu_power_parse_dt_clock(pdev, mp);
-	if (rc) {
-		pr_err("device clock parsing failed\n");
-		goto end;
-	}
-
 	rc = dpu_power_parse_dt_supply(pdev, mp);
 	if (rc) {
 		pr_err("device vreg supply parsing failed\n");
-		goto parse_vreg_err;
+		return rc;
 	}
 
 	rc = msm_dss_config_vreg(&pdev->dev,
@@ -700,18 +637,6 @@ int dpu_power_resource_init(struct platform_device *pdev,
 		goto vreg_err;
 	}
 
-	rc = msm_dss_get_clk(&pdev->dev, mp->clk_config, mp->num_clk);
-	if (rc) {
-		pr_err("clock get failed rc=%d\n", rc);
-		goto clk_err;
-	}
-
-	rc = msm_dss_clk_set_rate(mp->clk_config, mp->num_clk);
-	if (rc) {
-		pr_err("clock set rate failed rc=%d\n", rc);
-		goto bus_err;
-	}
-
 	rc = dpu_power_reg_bus_parse(pdev, phandle);
 	if (rc) {
 		pr_err("register bus parse failed rc=%d\n", rc);
@@ -742,18 +667,11 @@ int dpu_power_resource_init(struct platform_device *pdev,
 		dpu_power_data_bus_unregister(&phandle->data_bus_handle[i]);
 	dpu_power_reg_bus_unregister(phandle->reg_bus_hdl);
 bus_err:
-	msm_dss_put_clk(mp->clk_config, mp->num_clk);
-clk_err:
 	msm_dss_config_vreg(&pdev->dev, mp->vreg_config, mp->num_vreg, 0);
 vreg_err:
 	if (mp->vreg_config)
 		devm_kfree(&pdev->dev, mp->vreg_config);
 	mp->num_vreg = 0;
-parse_vreg_err:
-	if (mp->clk_config)
-		devm_kfree(&pdev->dev, mp->clk_config);
-	mp->num_clk = 0;
-end:
 	return rc;
 }
 
@@ -796,19 +714,12 @@ void dpu_power_resource_deinit(struct platform_device *pdev,
 
 	dpu_power_reg_bus_unregister(phandle->reg_bus_hdl);
 
-	msm_dss_put_clk(mp->clk_config, mp->num_clk);
-
 	msm_dss_config_vreg(&pdev->dev, mp->vreg_config, mp->num_vreg, 0);
 
-	if (mp->clk_config)
-		devm_kfree(&pdev->dev, mp->clk_config);
-
 	if (mp->vreg_config)
 		devm_kfree(&pdev->dev, mp->vreg_config);
 
 	mp->num_vreg = 0;
-	mp->num_clk = 0;
-
 }
 
 int dpu_power_resource_enable(struct dpu_power_handle *phandle,
@@ -885,12 +796,6 @@ int dpu_power_resource_enable(struct dpu_power_handle *phandle,
 			goto reg_bus_hdl_err;
 		}
 
-		rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, enable);
-		if (rc) {
-			pr_err("clock enable failed rc:%d\n", rc);
-			goto clk_err;
-		}
-
 		dpu_power_event_trigger_locked(phandle,
 				DPU_POWER_EVENT_POST_ENABLE);
 
@@ -898,8 +803,6 @@ int dpu_power_resource_enable(struct dpu_power_handle *phandle,
 		dpu_power_event_trigger_locked(phandle,
 				DPU_POWER_EVENT_PRE_DISABLE);
 
-		msm_dss_enable_clk(mp->clk_config, mp->num_clk, enable);
-
 		dpu_power_reg_bus_update(phandle->reg_bus_hdl,
 							max_usecase_ndx);
 
@@ -917,8 +820,6 @@ int dpu_power_resource_enable(struct dpu_power_handle *phandle,
 	mutex_unlock(&phandle->phandle_lock);
 	return rc;
 
-clk_err:
-	dpu_power_reg_bus_update(phandle->reg_bus_hdl, prev_usecase_ndx);
 reg_bus_hdl_err:
 	msm_dss_enable_vreg(mp->vreg_config, mp->num_vreg, 0);
 vreg_err:
@@ -930,101 +831,6 @@ int dpu_power_resource_enable(struct dpu_power_handle *phandle,
 	return rc;
 }
 
-int dpu_power_clk_set_rate(struct dpu_power_handle *phandle, char *clock_name,
-	u64 rate)
-{
-	int i, rc = -EINVAL;
-	struct dss_module_power *mp;
-
-	if (!phandle) {
-		pr_err("invalid input power handle\n");
-		return -EINVAL;
-	}
-	mp = &phandle->mp;
-
-	for (i = 0; i < mp->num_clk; i++) {
-		if (!strcmp(mp->clk_config[i].clk_name, clock_name)) {
-			if (mp->clk_config[i].max_rate &&
-					(rate > mp->clk_config[i].max_rate))
-				rate = mp->clk_config[i].max_rate;
-
-			mp->clk_config[i].rate = rate;
-			rc = msm_dss_clk_set_rate(mp->clk_config, mp->num_clk);
-			break;
-		}
-	}
-
-	return rc;
-}
-
-u64 dpu_power_clk_get_rate(struct dpu_power_handle *phandle, char *clock_name)
-{
-	int i;
-	struct dss_module_power *mp;
-	u64 rate = -EINVAL;
-
-	if (!phandle) {
-		pr_err("invalid input power handle\n");
-		return -EINVAL;
-	}
-	mp = &phandle->mp;
-
-	for (i = 0; i < mp->num_clk; i++) {
-		if (!strcmp(mp->clk_config[i].clk_name, clock_name)) {
-			rate = clk_get_rate(mp->clk_config[i].clk);
-			break;
-		}
-	}
-
-	return rate;
-}
-
-u64 dpu_power_clk_get_max_rate(struct dpu_power_handle *phandle,
-		char *clock_name)
-{
-	int i;
-	struct dss_module_power *mp;
-	u64 rate = 0;
-
-	if (!phandle) {
-		pr_err("invalid input power handle\n");
-		return 0;
-	}
-	mp = &phandle->mp;
-
-	for (i = 0; i < mp->num_clk; i++) {
-		if (!strcmp(mp->clk_config[i].clk_name, clock_name)) {
-			rate = mp->clk_config[i].max_rate;
-			break;
-		}
-	}
-
-	return rate;
-}
-
-struct clk *dpu_power_clk_get_clk(struct dpu_power_handle *phandle,
-		char *clock_name)
-{
-	int i;
-	struct dss_module_power *mp;
-	struct clk *clk = NULL;
-
-	if (!phandle) {
-		pr_err("invalid input power handle\n");
-		return 0;
-	}
-	mp = &phandle->mp;
-
-	for (i = 0; i < mp->num_clk; i++) {
-		if (!strcmp(mp->clk_config[i].clk_name, clock_name)) {
-			clk = mp->clk_config[i].clk;
-			break;
-		}
-	}
-
-	return clk;
-}
-
 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),
diff --git a/drivers/gpu/drm/msm/dpu_power_handle.h b/drivers/gpu/drm/msm/dpu_power_handle.h
index 1edae5c..83f048d 100644
--- a/drivers/gpu/drm/msm/dpu_power_handle.h
+++ b/drivers/gpu/drm/msm/dpu_power_handle.h
@@ -230,46 +230,6 @@ int dpu_power_data_bus_state_update(struct dpu_power_handle *phandle,
 							bool enable);
 
 /**
- * dpu_power_clk_set_rate() - set the clock rate
- * @pdata:  power handle containing the resources
- * @clock_name: clock name which needs rate update.
- * @rate:       Requested rate.
- *
- * Return: error code.
- */
-int dpu_power_clk_set_rate(struct dpu_power_handle *pdata, char *clock_name,
-	u64 rate);
-
-/**
- * dpu_power_clk_get_rate() - get the clock rate
- * @pdata:  power handle containing the resources
- * @clock_name: clock name to get the rate
- *
- * Return: current clock rate
- */
-u64 dpu_power_clk_get_rate(struct dpu_power_handle *pdata, char *clock_name);
-
-/**
- * dpu_power_clk_get_max_rate() - get the maximum clock rate
- * @pdata:  power handle containing the resources
- * @clock_name: clock name to get the max rate.
- *
- * Return: maximum clock rate or 0 if not found.
- */
-u64 dpu_power_clk_get_max_rate(struct dpu_power_handle *pdata,
-		char *clock_name);
-
-/**
- * dpu_power_clk_get_clk() - get the clock
- * @pdata:  power handle containing the resources
- * @clock_name: clock name to get the clk pointer.
- *
- * Return: Pointer to clock
- */
-struct clk *dpu_power_clk_get_clk(struct dpu_power_handle *phandle,
-		char *clock_name);
-
-/**
  * 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
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

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