disp: msm: sde: add custom event to notify OPR, MISR value change

This change collects the OPR, MISR values. If the values are
different than the previous then notify to client with custom event.

Change-Id: I2546439be1f665d90e6505d65283d28096bf7cdd
Signed-off-by: Akshay Ashtunkar <quic_akshayaa@quicinc.com>

msm/sde/sde_encoder.h

@@ -222,7 +222,7 @@ struct sde_encoder_virt {
 	struct sde_rsc_client *rsc_client;
 	bool rsc_state_init;
 	struct msm_display_info disp_info;
-	bool misr_enable;
+	atomic_t misr_enable;
 	bool misr_reconfigure;
 	u32 misr_frame_count;
 
@@ -692,4 +692,38 @@ static inline bool sde_encoder_is_widebus_enabled(struct drm_encoder *drm_enc)
 bool sde_encoder_is_line_insertion_supported(struct drm_encoder *drm_enc);
 
 void sde_encoder_add_data_to_minidump_va(struct drm_encoder *drm_enc);
+
+/**
+ * sde_encoder_misr_sign_event_notify - collect MISR, check with previous value
+ * if change then notify to client with custom event
+ * @drm_enc: pointer to drm encoder
+ */
+void sde_encoder_misr_sign_event_notify(struct drm_encoder *drm_enc);
+
+/**
+ * sde_encoder_register_misr_event - register or deregister MISR event
+ * @drm_enc: pointer to drm encoder
+ * @val: indicates register or deregister
+ */
+static inline int sde_encoder_register_misr_event(struct drm_encoder *drm_enc, bool val)
+{
+	struct sde_encoder_virt *sde_enc = NULL;
+
+	if (!drm_enc)
+		return -EINVAL;
+
+	sde_enc = to_sde_encoder_virt(drm_enc);
+	atomic_set(&sde_enc->misr_enable, val);
+
+	/*
+	 * To setup MISR ctl reg, set misr_reconfigure as true.
+	 * MISR is calculated for the specific number of frames.
+	 */
+	if (atomic_read(&sde_enc->misr_enable)) {
+		sde_enc->misr_reconfigure = true;
+		sde_enc->misr_frame_count = 1;
+	}
+
+	return 0;
+}
 #endif /* __SDE_ENCODER_H__ */