1 files changed, 95 insertions, 0 deletions
diff --git a/src/drivers/lenovo/hybrid_graphics/romstage.c b/src/drivers/lenovo/hybrid_graphics/romstage.c
new file mode 100644
index 000000000000..9009c5841a65
--- /dev/null
+++ b/src/drivers/lenovo/hybrid_graphics/romstage.c
@@ -0,0 +1,95 @@
+/*
+ * 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 <ec/lenovo/pmh7/pmh7.h>
+#include <console/console.h>
+#include <delay.h>
+
+#include "hybrid_graphics.h"
+#include "chip.h"
+
+/*
+ * Returns the hybrid graphics presence and user's card preferences.
+ */
+void early_hybrid_graphics(bool *enable_igd, bool *enable_peg)
+{
+	const struct drivers_lenovo_hybrid_graphics_config *config;
+	const struct device *dev;
+	enum hybrid_graphics_req mode = HYBRID_GRAPHICS_DEFAULT_GPU;
+
+	/* TODO: Use generic device instead of dummy PNP device */
+	dev = dev_find_slot_pnp(HYBRID_GRAPHICS_PORT, HYBRID_GRAPHICS_DEVICE);
+
+	if (!dev || !dev->chip_info) {
+		printk(BIOS_ERR, "Hybrid graphics: ERROR\n");
+		*enable_igd = true;
+		*enable_peg = false;
+		return;
+	}
+
+	config = dev->chip_info;
+	if (get_gpio(config->detect_gpio) == DGPU_NOT_INSTALLED) {
+		printk(BIOS_DEBUG, "Hybrid graphics:"
+		       " No discrete GPU present.\n");
+		*enable_igd = true;
+		*enable_peg = false;
+		return;
+	}
+
+	get_option(&mode, "hybrid_graphics_mode");
+
+	if (mode == HYBRID_GRAPHICS_DISCRETE) {
+		printk(BIOS_DEBUG, "Hybrid graphics:"
+		       " Disabling integrated GPU.\n");
+
+		*enable_igd = false;
+		*enable_peg = true;
+	} else if (mode == HYBRID_GRAPHICS_INTEGRATED) {
+		printk(BIOS_DEBUG, "Hybrid graphics:"
+		       " Disabling discrete GPU.\n");
+
+		*enable_igd = true;
+		*enable_peg = false;
+	} else {
+		printk(BIOS_DEBUG, "Hybrid graphics:"
+		       " Activating Switchable (both GPUs).\n");
+
+		*enable_igd = true;
+		*enable_peg = true;
+	}
+
+	/*
+	 * Need to do power handling here as we know there's a dGPU to
+	 * turn off. Support GPIO and Thinker1.
+	 */
+	if (!*enable_peg) {
+		if (config->has_dgpu_power_gpio) {
+			set_gpio(config->dgpu_power_gpio,
+				 config->dgpu_power_off_lvl);
+		} else if (config->has_thinker1) {
+			pmh7_register_clear_bit(0x50, 7); // DGPU_RST
+			udelay(100);
+			pmh7_register_clear_bit(0x50, 3); // DGPU_PWR
+		} else {
+			printk(BIOS_ERR, "Hybrid graphics:"
+			       " FIXME: dGPU power not disabled !\n");
+		}
+	}
+}