drm/msm: dpu: Handle crtc pm_runtime_resume() directly

Instead of registering through dpu_power_handle just to get a call on
runtime_resume, call the crtc function directly.

Changes in v2:
- None
Reviewed-by: NJeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: NSean Paul <seanpaul@chromium.org>
Signed-off-by: NRob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c

@@ -33,7 +33,6 @@
 #include "dpu_plane.h"
 #include "dpu_encoder.h"
 #include "dpu_vbif.h"
-#include "dpu_power_handle.h"
 #include "dpu_core_perf.h"
 #include "dpu_trace.h"
 
@@ -69,8 +68,6 @@ static void dpu_crtc_destroy(struct drm_crtc *crtc)
 	if (!crtc)
 		return;
 
-	dpu_crtc->phandle = NULL;
-
 	drm_crtc_cleanup(crtc);
 	mutex_destroy(&dpu_crtc->crtc_lock);
 	kfree(dpu_crtc);
@@ -860,15 +857,17 @@ static struct drm_crtc_state *dpu_crtc_duplicate_state(struct drm_crtc *crtc)
 	return &cstate->base;
 }
 
-static void dpu_crtc_handle_power_event(u32 event_type, void *arg)
+void dpu_crtc_runtime_resume(struct drm_crtc *crtc)
 {
-	struct drm_crtc *crtc = arg;
 	struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
 	struct drm_encoder *encoder;
 
 	mutex_lock(&dpu_crtc->crtc_lock);
 
-	trace_dpu_crtc_handle_power_event(DRMID(crtc), event_type);
+	if (!dpu_crtc->enabled)
+		goto end;
+
+	trace_dpu_crtc_runtime_resume(DRMID(crtc));
 
 	/* restore encoder; crtc will be programmed during commit */
 	drm_for_each_encoder(encoder, crtc->dev) {
@@ -878,6 +877,7 @@ static void dpu_crtc_handle_power_event(u32 event_type, void *arg)
 		dpu_encoder_virt_restore(encoder);
 	}
 
+end:
 	mutex_unlock(&dpu_crtc->crtc_lock);
 }
 
@@ -933,10 +933,6 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
 		dpu_encoder_register_frame_event_callback(encoder, NULL, NULL);
 	}
 
-	if (dpu_crtc->power_event)
-		dpu_power_handle_unregister_event(dpu_crtc->phandle,
-				dpu_crtc->power_event);
-
 	memset(cstate->mixers, 0, sizeof(cstate->mixers));
 	cstate->num_mixers = 0;
 
@@ -988,11 +984,6 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 
 	/* Enable/restore vblank irq handling */
 	drm_crtc_vblank_on(crtc);
-
-	dpu_crtc->power_event = dpu_power_handle_register_event(
-		dpu_crtc->phandle, DPU_POWER_EVENT_ENABLE,
-		dpu_crtc_handle_power_event, crtc, dpu_crtc->name);
-
 }
 
 struct plane_state {
@@ -1539,8 +1530,6 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane,
 	/* initialize event handling */
 	spin_lock_init(&dpu_crtc->event_lock);
 
-	dpu_crtc->phandle = &kms->phandle;
-
 	DPU_DEBUG("%s: successfully initialized crtc\n", dpu_crtc->name);
 	return crtc;
 }

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h

@@ -151,7 +151,6 @@ struct dpu_crtc_frame_event {
  * @event_worker  : Event worker queue
  * @event_lock    : Spinlock around event handling code
  * @phandle: Pointer to power handler
- * @power_event   : registered power event handle
  * @cur_perf      : current performance committed to clock/bandwidth driver
  */
 struct dpu_crtc {
@@ -187,9 +186,6 @@ struct dpu_crtc {
 	/* for handling internal event thread */
 	spinlock_t event_lock;
 
-	struct dpu_power_handle *phandle;
-	struct dpu_power_event *power_event;
-
 	struct dpu_core_perf_params cur_perf;
 
 	struct dpu_crtc_smmu_state_data smmu_state;
@@ -334,4 +330,10 @@ static inline bool dpu_crtc_is_enabled(struct drm_crtc *crtc)
 	return crtc ? crtc->enabled : false;
 }
 
+/**
+ * dpu_crtc_runtime_resume - called by the top-level on pm_runtime_resume
+ * @crtc: CRTC to resume
+ */
+void dpu_crtc_runtime_resume(struct drm_crtc *crtc);
+
 #endif /* _DPU_CRTC_H_ */

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

@@ -1141,6 +1141,7 @@ static int __maybe_unused dpu_runtime_resume(struct device *dev)
 	int rc = -1;
 	struct platform_device *pdev = to_platform_device(dev);
 	struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
+	struct drm_crtc *crtc;
 	struct drm_device *ddev;
 	struct dss_module_power *mp = &dpu_kms->mp;
 
@@ -1158,6 +1159,9 @@ static int __maybe_unused dpu_runtime_resume(struct device *dev)
 
 	dpu_vbif_init_memtypes(dpu_kms);
 
+	drm_for_each_crtc(crtc, ddev)
+		dpu_crtc_runtime_resume(crtc);
+
 	rc = dpu_power_resource_enable(&dpu_kms->phandle, true);
 	if (rc)
 		DPU_ERROR("resource enable failed: %d\n", rc);

drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h

@@ -298,6 +298,10 @@ DEFINE_EVENT(dpu_drm_obj_template, dpu_kms_wait_for_commit_done,
 	TP_PROTO(uint32_t drm_id),
 	TP_ARGS(drm_id)
 );
+DEFINE_EVENT(dpu_drm_obj_template, dpu_crtc_runtime_resume,
+	TP_PROTO(uint32_t drm_id),
+	TP_ARGS(drm_id)
+);
 
 TRACE_EVENT(dpu_enc_enable,
 	TP_PROTO(uint32_t drm_id, int hdisplay, int vdisplay),
@@ -518,10 +522,6 @@ DEFINE_EVENT(dpu_id_event_template, dpu_crtc_frame_event_cb,
 	TP_PROTO(uint32_t drm_id, u32 event),
 	TP_ARGS(drm_id, event)
 );
-DEFINE_EVENT(dpu_id_event_template, dpu_crtc_handle_power_event,
-	TP_PROTO(uint32_t drm_id, u32 event),
-	TP_ARGS(drm_id, event)
-);
 DEFINE_EVENT(dpu_id_event_template, dpu_crtc_frame_event_done,
 	TP_PROTO(uint32_t drm_id, u32 event),
 	TP_ARGS(drm_id, event)