From 3138d03a75d2ce3bca6bb2d553c79a86c5f34dcf Mon Sep 17 00:00:00 2001
From: Konstantin Makariev <hcv867@motorola.com>
Date: Tue, 10 Dec 2019 13:32:51 -0600
Subject: [PATCH] dsi: pushing display notifications

Pushing display notifications when it is turning on and off, so
registered listener can become aware of it state.

Change-Id: I5ae139d5a9099a86d94f54f7495ddf12659c98ba
Signed-off-by: Konstantin Makariev <hcv867@motorola.com>
Reviewed-on: https://gerrit.mot.com/1697625
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Guobin Zhang <zhanggb@motorola.com>
Submit-Approved: Jira Key
---
 msm/dsi/dsi_display.c |  8 ++++++--
 msm/dsi/dsi_display.h |  2 ++
 msm/dsi/dsi_panel.c   | 34 ++++++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/msm/dsi/dsi_display.c b/msm/dsi/dsi_display.c
index f138e668395e..e87c3ae5c10e 100644
--- a/msm/dsi/dsi_display.c
+++ b/msm/dsi/dsi_display.c
@@ -6480,11 +6480,15 @@ int dsi_display_dev_probe(struct platform_device *pdev)
 
 	display->display_type = of_get_property(pdev->dev.of_node,
 				"label", NULL);
-	if (!display->display_type)
+	if (!display->display_type) {
 		display->display_type = "primary";
+		display->display_idx = 0;
+	}
 
-	if (!strcmp(display->display_type, "secondary"))
+	if (!strcmp(display->display_type, "secondary")) {
 		index = DSI_SECONDARY;
+		display->display_idx = 1;
+	}
 
 	boot_disp = &boot_displays[index];
 	node = pdev->dev.of_node;
diff --git a/msm/dsi/dsi_display.h b/msm/dsi/dsi_display.h
index b4edfbcad47f..fe479e61b1df 100644
--- a/msm/dsi/dsi_display.h
+++ b/msm/dsi/dsi_display.h
@@ -145,6 +145,7 @@ struct dsi_display_ext_bridge {
  * @ext_conn:         Pointer to external connector attached to DSI connector
  * @name:             Name of the display.
  * @display_type:     Display type as defined in device tree.
+ * @display_idx:      Display index (0-primary, 1-secondary)
  * @list:             List pointer.
  * @is_active:        Is display active.
  * @is_cont_splash_enabled:  Is continuous splash enabled
@@ -209,6 +210,7 @@ struct dsi_display {
 
 	const char *name;
 	const char *display_type;
+	int display_idx;
 	struct list_head list;
 	bool is_cont_splash_enabled;
 	bool sw_te_using_wd;
diff --git a/msm/dsi/dsi_panel.c b/msm/dsi/dsi_panel.c
index 978a747f354f..306270032e9a 100644
--- a/msm/dsi/dsi_panel.c
+++ b/msm/dsi/dsi_panel.c
@@ -11,6 +11,17 @@
 #include <linux/pwm.h>
 #include <video/mipi_display.h>
 
+#if defined(CONFIG_PANEL_NOTIFICATIONS)
+#include <linux/panel_notifier.h>
+
+#define PANEL_NOTIFY(note) { \
+	int idx = dsi_panel_get_index(panel); \
+	panel_notify(note, (void *)&idx); \
+}
+#else
+#define PANEL_NOTIFY(...)
+#endif
+
 #include "dsi_display.h"
 #include "dsi_panel.h"
 #include "dsi_ctrl_hw.h"
@@ -5285,6 +5296,19 @@ int dsi_panel_post_switch(struct dsi_panel *panel)
 	return rc;
 }
 
+#if defined(CONFIG_PANEL_NOTIFICATIONS)
+static inline int dsi_panel_get_index(struct dsi_panel *panel)
+{
+	struct dsi_display *dsi_display =
+			container_of(panel->host, struct dsi_display, host);
+
+	if (unlikely(dsi_display == NULL))
+		return -EINVAL;
+
+	return dsi_display->display_idx;
+}
+#endif
+
 int dsi_panel_enable(struct dsi_panel *panel)
 {
 	int rc = 0;
@@ -5334,6 +5358,9 @@ int dsi_panel_enable(struct dsi_panel *panel)
 		DSI_INFO("-: no_panel_on_read_support is set\n");
 
 	panel->panel_initialized = true;
+
+	PANEL_NOTIFY(PANEL_EVENT_PRE_DISPLAY_ON);
+
 err:
 
 	mutex_unlock(&panel->panel_lock);
@@ -5365,6 +5392,9 @@ int dsi_panel_post_enable(struct dsi_panel *panel)
 			       panel->name, rc);
 		}
 	}
+
+	PANEL_NOTIFY(PANEL_EVENT_DISPLAY_ON);
+
 error:
 	mutex_unlock(&panel->panel_lock);
 	return rc;
@@ -5391,6 +5421,8 @@ int dsi_panel_pre_disable(struct dsi_panel *panel)
 		goto error;
 	}
 
+	PANEL_NOTIFY(PANEL_EVENT_PRE_DISPLAY_OFF);
+
 error:
 	mutex_unlock(&panel->panel_lock);
 	return rc;
@@ -5439,6 +5471,8 @@ int dsi_panel_disable(struct dsi_panel *panel)
 	panel->panel_initialized = false;
 	panel->power_mode = SDE_MODE_DPMS_OFF;
 
+	PANEL_NOTIFY(PANEL_EVENT_DISPLAY_OFF);
+
 	mutex_unlock(&panel->panel_lock);
 	return rc;
 }