disp: msm: sde: ignore HW recovery disable event

The current SDE driver logic during MDP hang cases is to send a capture
event to user-mode if recovery custom event is registered. Otherwise, it
will enforce a device panic for debugging purpose. This might have a race
condition during the display tear-down sequence as user-mode unregisters
the recovery event when the last frame is in progress. If the last frame
causes any MDP hang, it will result in a device reset. Support only the
event registration to avoid this case, since HW recovery is not expected
to be changed dynamically.

Change-Id: I8a11e1060b239ac6827f1d078e3e396cff4c1325
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>

msm/sde/sde_encoder.c

@@ -5422,8 +5422,7 @@ bool sde_encoder_recovery_events_enabled(struct drm_encoder *encoder)
 	return sde_enc->recovery_events_enabled;
 }
 
-void sde_encoder_recovery_events_handler(struct drm_encoder *encoder,
-		bool enabled)
+void sde_encoder_enable_recovery_event(struct drm_encoder *encoder)
 {
 	struct sde_encoder_virt *sde_enc;
 
@@ -5433,5 +5432,5 @@ void sde_encoder_recovery_events_handler(struct drm_encoder *encoder,
 	}
 
 	sde_enc = to_sde_encoder_virt(encoder);
-	sde_enc->recovery_events_enabled = enabled;
+	sde_enc->recovery_events_enabled = true;
 }