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.h

@@ -19,6 +19,8 @@
  * @clk_get_rate: get the current rate for provided clk_name
  */
 struct dp_power {
+	struct drm_device *drm_dev;
+	struct sde_power_handle *phandle;
 	int (*init)(struct dp_power *power, bool flip);
 	int (*deinit)(struct dp_power *power);
 	int (*clk_enable)(struct dp_power *power, enum dp_pm_type pm_type,
@@ -26,7 +28,8 @@ struct dp_power {
 	int (*set_pixel_clk_parent)(struct dp_power *power, u32 stream_id);
 	u64 (*clk_get_rate)(struct dp_power *power, char *clk_name);
 	int (*power_client_init)(struct dp_power *power,
-				struct sde_power_handle *phandle);
+		struct sde_power_handle *phandle,
+		struct drm_device *drm_dev);
 	void (*power_client_deinit)(struct dp_power *power);
 };