target: msm8974: Add panel autodetection for 8974

Adding support for autodetecting 720p/1080p
panel for 8974 platform. This allows either
panel to be attached/replaced without any code change.

Change-Id: I2c605c80f92a0e924f39908b668c5c28d4ea33ba
diff --git a/target/msm8974/init.c b/target/msm8974/init.c
index 5c8bfef..bb7fe08 100644
--- a/target/msm8974/init.c
+++ b/target/msm8974/init.c
@@ -587,23 +587,49 @@
 	}
 }
 
-/* Returns 1 if target supports continuous splash screen. */
-int target_cont_splash_screen()
+uint8_t target_panel_auto_detect_enabled()
 {
 	switch(board_hardware_id())
 	{
 		case HW_PLATFORM_SURF:
 		case HW_PLATFORM_MTP:
 		case HW_PLATFORM_FLUID:
-		case HW_PLATFORM_DRAGON:
-		case HW_PLATFORM_LIQUID:
-			dprintf(SPEW, "Target_cont_splash=1\n");
 			return 1;
 			break;
 		default:
-			dprintf(SPEW, "Target_cont_splash=0\n");
 			return 0;
+			break;
 	}
+	return 0;
+}
+
+static uint8_t splash_override;
+/* Returns 1 if target supports continuous splash screen. */
+int target_cont_splash_screen()
+{
+	uint8_t splash_screen = 0;
+	if(!splash_override) {
+		switch(board_hardware_id())
+		{
+			case HW_PLATFORM_SURF:
+			case HW_PLATFORM_MTP:
+			case HW_PLATFORM_FLUID:
+			case HW_PLATFORM_DRAGON:
+			case HW_PLATFORM_LIQUID:
+				dprintf(SPEW, "Target_cont_splash=1\n");
+				splash_screen = 1;
+				break;
+			default:
+				dprintf(SPEW, "Target_cont_splash=0\n");
+				splash_screen = 0;
+		}
+	}
+	return splash_screen;
+}
+
+void target_force_cont_splash_disable(uint8_t override)
+{
+	splash_override = override;
 }
 
 unsigned target_pause_for_battery_charge(void)