disp: msm: add runtime_pm ops support in drm driver

Add runtime_pm ops support in drm driver instead
of direct sde_power_resource_enable/disable call.
It allows drm driver to use runtime pm refcount logic
to track the resources instead of custom implementation.
The change also removes the NRT_CLIENT support from
sde_power_handle code to simplify it further.

Change-Id: Ib14692dca5876703d0a230da2512d731b69b8ebb
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>

msm/dp/dp_power.c

@@ -6,6 +6,8 @@
 #define pr_fmt(fmt)	"[drm-dp] %s: " fmt, __func__
 
 #include <linux/clk.h>
+#include <linux/pm_runtime.h>
+#include <drm/drmP.h>
 #include "dp_power.h"
 #include "dp_catalog.h"
 
@@ -20,8 +22,6 @@ struct dp_power_private {
 	struct clk *pixel1_parent;
 
 	struct dp_power dp_power;
-	struct sde_power_client *dp_core_client;
-	struct sde_power_handle *phandle;
 
 	bool core_clks_on;
 	bool link_clks_on;
@@ -458,14 +458,13 @@ static int dp_power_config_gpios(struct dp_power_private *power, bool flip,
 }
 
 static int dp_power_client_init(struct dp_power *dp_power,
-		struct sde_power_handle *phandle)
+	struct sde_power_handle *phandle, struct drm_device *drm_dev)
 {
 	int rc = 0;
 	struct dp_power_private *power;
-	char dp_client_name[DP_CLIENT_NAME_SIZE];
 
-	if (!dp_power) {
-		pr_err("invalid power data\n");
+	if (!drm_dev) {
+		pr_err("invalid drm_dev\n");
 		return -EINVAL;
 	}
 
@@ -482,20 +481,11 @@ static int dp_power_client_init(struct dp_power *dp_power,
 		pr_err("failed to init clocks\n");
 		goto error_clk;
 	}
+	dp_power->phandle = phandle;
+	dp_power->drm_dev = drm_dev;
 
-	power->phandle = phandle;
-	snprintf(dp_client_name, DP_CLIENT_NAME_SIZE, "dp_core_client");
-	power->dp_core_client = sde_power_client_create(phandle,
-			dp_client_name);
-	if (IS_ERR_OR_NULL(power->dp_core_client)) {
-		pr_err("[%s] client creation failed for DP\n", dp_client_name);
-		rc = -EINVAL;
-		goto error_client;
-	}
 	return 0;
 
-error_client:
-	dp_power_clk_init(power, false);
 error_clk:
 	dp_power_regulator_deinit(power);
 error_power:
@@ -513,7 +503,6 @@ static void dp_power_client_deinit(struct dp_power *dp_power)
 
 	power = container_of(dp_power, struct dp_power_private, dp_power);
 
-	sde_power_client_destroy(power->phandle, power->dp_core_client);
 	dp_power_clk_init(power, false);
 	dp_power_regulator_deinit(power);
 }
@@ -559,7 +548,7 @@ static u64 dp_power_clk_get_rate(struct dp_power *dp_power, char *clk_name)
 	}
 
 	power = container_of(dp_power, struct dp_power_private, dp_power);
-	mp = &power->phandle->mp;
+	mp = &dp_power->phandle->mp;
 	for (i = 0; i < mp->num_clk; i++) {
 		if (!strcmp(mp->clk_config[i].clk_name, clk_name)) {
 			rate = clk_get_rate(mp->clk_config[i].clk);
@@ -613,9 +602,8 @@ static int dp_power_init(struct dp_power *dp_power, bool flip)
 		goto err_gpio;
 	}
 
-	rc = sde_power_resource_enable(power->phandle,
-		power->dp_core_client, true);
-	if (rc) {
+	rc = pm_runtime_get_sync(dp_power->drm_dev->dev);
+	if (rc < 0) {
 		pr_err("Power resource enable failed\n");
 		goto err_sde_power;
 	}
@@ -629,7 +617,7 @@ static int dp_power_init(struct dp_power *dp_power, bool flip)
 	return 0;
 
 err_clk:
-	sde_power_resource_enable(power->phandle, power->dp_core_client, false);
+	pm_runtime_put_sync(dp_power->drm_dev->dev);
 err_sde_power:
 	dp_power_config_gpios(power, flip, false);
 err_gpio:
@@ -657,13 +645,8 @@ static int dp_power_deinit(struct dp_power *dp_power)
 		dp_power_clk_enable(dp_power, DP_LINK_PM, false);
 
 	dp_power_clk_enable(dp_power, DP_CORE_PM, false);
+	pm_runtime_put_sync(dp_power->drm_dev->dev);
 
-	rc = sde_power_resource_enable(power->phandle,
-			power->dp_core_client, false);
-	if (rc) {
-		pr_err("Power resource disable failed, rc=%d\n", rc);
-		goto exit;
-	}
 	dp_power_config_gpios(power, false, false);
 	dp_power_pinctrl_set(power, false);
 	dp_power_regulator_ctrl(power, false);