1 files changed, 72 insertions, 0 deletions
diff --git a/src/drivers/lenovo/hybrid_graphics/hybrid_graphics.c b/src/drivers/lenovo/hybrid_graphics/hybrid_graphics.c
new file mode 100644
index 0000000000..4fa5b81e8e
--- /dev/null
+++ b/src/drivers/lenovo/hybrid_graphics/hybrid_graphics.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <types.h>
+#include <option.h>
+#include <device/device.h>
+
+#include <southbridge/intel/common/gpio.h>
+#include <console/console.h>
+#include "chip.h"
+
+/*
+ * Switch panel mux or backlight mux to active GPU.
+ * In case both GPUs are active switch panel mux to integrated.
+ */
+static void lenovo_hybrid_graphics_enable(struct device *dev)
+{
+	const struct drivers_lenovo_hybrid_graphics_config *config;
+	enum hybrid_graphics_req mode = HYBRID_GRAPHICS_DEFAULT_GPU;
+
+	/* Don't confuse anyone else and disable the fake device */
+	dev->enabled = 0;
+
+	config = dev->chip_info;
+	if (!config || (get_gpio(config->detect_gpio) == DGPU_NOT_INSTALLED)) {
+		printk(BIOS_DEBUG, "Hybrid graphics: Not installed\n");
+		return;
+	}
+
+	get_option(&mode, "hybrid_graphics_mode");
+
+	if (mode == HYBRID_GRAPHICS_DISCRETE) {
+		printk(BIOS_DEBUG, "Hybrid graphics:"
+		       " Switching panel to discrete GPU.\n");
+
+		if (config->has_panel_hybrid_gpio)
+			set_gpio(config->panel_hybrid_gpio,
+				 !config->panel_integrated_lvl);
+
+		if (config->has_backlight_gpio)
+			set_gpio(config->backlight_gpio,
+				 !config->backlight_integrated_lvl);
+	} else {
+		printk(BIOS_DEBUG, "Hybrid graphics:"
+		       " Switching panel to integrated GPU.\n");
+
+		if (config->has_panel_hybrid_gpio)
+			set_gpio(config->panel_hybrid_gpio,
+				 config->panel_integrated_lvl);
+
+		if (config->has_backlight_gpio)
+			set_gpio(config->backlight_gpio,
+				 config->backlight_integrated_lvl);
+	}
+}
+
+struct chip_operations drivers_lenovo_hybrid_graphics_ops = {
+	CHIP_NAME("Lenovo hybrid graphics driver")
+	.enable_dev = &lenovo_hybrid_graphics_enable
+};