feat(epicardium): Only perform fast display init

The bootloader will have initialized the display in all cases so we
don't need to repeat the same init code all over again.

Signed-off-by: Rahix <rahix@rahix.de>

epicardium/modules/hardware.c

@@ -80,7 +80,11 @@ int hardware_early_init(void)
 			;
 	}
 
-	display_init();
+	/*
+	 * The bootloader has already initialized the display, so we only need
+	 * to do the bare minimum here (mostly the gfx datastructures).
+	 */
+	display_init_slim();
 
 	/*
 	 * RGB LEDs

lib/card10/display.c

@@ -103,3 +103,18 @@ void display_init(void)
 	txt_init(&display_textb, &display_screen, &Font12);
 	gfx_clear(&display_screen);
 }
+
+void display_init_slim(void)
+{
+	if (!portexpander_detected()) {
+		// Open-drain
+		MAX77650_setDRV(false);
+		// Output
+		MAX77650_setDIR(false);
+	}
+
+	GPIO_Config(&DEV_DC_PIN);
+
+	display_screen = gfx_screen(LCD_framebuffer());
+	txt_init(&display_textb, &display_screen, &Font12);
+}

lib/card10/display.h

@@ -6,5 +6,6 @@ extern struct gfx_region display_screen;
 extern struct txt_buffer display_textb;
 
 void display_init(void);
+void display_init_slim(void);
 
 #endif