drm/msm/dp: split dp_ctrl_clk_enable into four functuions

Split the dp_ctrl_clk_enable() beast into four functions, each of them
doing just a single item: enabling or disabling core or link clocks.
This allows us to cleanup the dss_module_power structure and makes
several dp_ctrl functions return void.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/576105/
Link: https://lore.kernel.org/r/20240126-dp-power-parser-cleanup-v3-8-098d5f581dd3@linaro.org

drivers/gpu/drm/msm/dp/dp_ctrl.h

@@ -17,17 +17,11 @@ struct dp_ctrl {
 	bool wide_bus_en;
 };
 
-enum dp_pm_type {
-	DP_CORE_PM,
-	DP_CTRL_PM,
-	DP_MAX_PM
-};
-
 int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl);
 int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train);
-int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl);
-int dp_ctrl_off_link(struct dp_ctrl *dp_ctrl);
-int dp_ctrl_off(struct dp_ctrl *dp_ctrl);
+void dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl);
+void dp_ctrl_off_link(struct dp_ctrl *dp_ctrl);
+void dp_ctrl_off(struct dp_ctrl *dp_ctrl);
 void dp_ctrl_push_idle(struct dp_ctrl *dp_ctrl);
 irqreturn_t dp_ctrl_isr(struct dp_ctrl *dp_ctrl);
 void dp_ctrl_handle_sink_request(struct dp_ctrl *dp_ctrl);
@@ -44,7 +38,7 @@ void dp_ctrl_irq_phy_exit(struct dp_ctrl *dp_ctrl);
 void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enable);
 void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl);
 
-int dp_ctrl_clk_enable(struct dp_ctrl *ctrl, enum dp_pm_type pm_type,
-		       bool enable);
+int dp_ctrl_core_clk_enable(struct dp_ctrl *dp_ctrl);
+void dp_ctrl_core_clk_disable(struct dp_ctrl *dp_ctrl);
 
 #endif /* _DP_CTRL_H_ */

drivers/gpu/drm/msm/dp/dp_display.c

@@ -433,7 +433,7 @@ static void dp_display_host_init(struct dp_display_private *dp)
 		dp->dp_display.connector_type, dp->core_initialized,
 		dp->phy_initialized);
 
-	dp_ctrl_clk_enable(dp->ctrl, DP_CORE_PM, true);
+	dp_ctrl_core_clk_enable(dp->ctrl);
 	dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
 	dp_aux_init(dp->aux);
 	dp->core_initialized = true;
@@ -447,7 +447,7 @@ static void dp_display_host_deinit(struct dp_display_private *dp)
 
 	dp_ctrl_reset_irq_ctrl(dp->ctrl, false);
 	dp_aux_deinit(dp->aux);
-	dp_ctrl_clk_enable(dp->ctrl, DP_CORE_PM, false);
+	dp_ctrl_core_clk_disable(dp->ctrl);
 	dp->core_initialized = false;
 }