mb/lenovo/t400: Implement hybrid graphic in romstage
The hybrid driver select by DRIVERS_LENOVO_HYBRID_GRAPHICS doesn't work
for t400/t500.
Replace it with a custom romstage implementation.
Tested on Lenovo T500 with dual graphics:
* Intel Native GFX init
* AMD VBios
* GNU Linux 4.8.13
* SeaBios as payload
* Discrete is working (44 W)
* Integrated is working (24 W)
* Switchable is working (34 W)
** Both GPUs are enabled, with Intel being connected to the panel
** DRI_PRIME allows to use AMD GPU
** ACPI doesn't seem to work (no vgaswitcheroo)
Depends on Change-Id: I4dc00005270240c048272b2e4f52ae46ba1c9422
Depends on Change-Id: If389016f3bb0c4c2fd0b826914997a87a9137201
Change-Id: I7496876e9b434d4a2388e1ede27ac604670339b7
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/18010
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
diff --git a/src/mainboard/lenovo/t400/hybrid_graphics.c b/src/mainboard/lenovo/t400/hybrid_graphics.c
new file mode 100644
index 0000000..b313ffa
--- /dev/null
+++ b/src/mainboard/lenovo/t400/hybrid_graphics.c
@@ -0,0 +1,91 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2012 secunet Security Networks AG
+ *
+ * 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 <stdint.h>
+#include <string.h>
+#include <southbridge/intel/common/gpio.h>
+#include <northbridge/intel/gm45/gm45.h>
+#include <console/console.h>
+#include <option.h>
+
+#define HYBRID_GRAPHICS_INTEGRATED_ONLY 0
+#define HYBRID_GRAPHICS_DISCRETE_ONLY 1
+#define HYBRID_GRAPHICS_SWITCHABLE 2
+
+#define MUX_GPIO 22
+#define BCL_CTL_GPIO 19
+#define GFX_PWR_EN_GPIO 49
+
+#define HYBRID_DETECT_GPIO 21
+
+void hybrid_graphics_init(sysinfo_t *sysinfo);
+
+static bool hybrid_graphics_installed(void)
+{
+ if (get_gpio(HYBRID_DETECT_GPIO))
+ return false;
+ else
+ return true;
+}
+
+void hybrid_graphics_init(sysinfo_t *sysinfo)
+{
+ /* Set default mode */
+ uint8_t hybrid_graphics_mode =
+ HYBRID_GRAPHICS_INTEGRATED_ONLY;
+
+ if (!hybrid_graphics_installed()) {
+ printk(BIOS_DEBUG, "Hybrid graphics not installed.\n");
+ /* The display is not connected to a mux or switchable. */
+ sysinfo->enable_igd = 1;
+ sysinfo->enable_peg = 0;
+ return;
+ }
+
+ printk(BIOS_DEBUG, "Hybrid graphics available: ");
+ get_option(&hybrid_graphics_mode, "hybrid_graphics_mode");
+
+ /* Select appropriate hybrid graphics device */
+ switch (hybrid_graphics_mode) {
+ default:
+ case HYBRID_GRAPHICS_INTEGRATED_ONLY:
+ printk(BIOS_DEBUG, "Activating Integrated Only.\n");
+ set_gpio(MUX_GPIO, GPIO_LEVEL_LOW);
+ set_gpio(BCL_CTL_GPIO, GPIO_LEVEL_LOW);
+ set_gpio(GFX_PWR_EN_GPIO, GPIO_LEVEL_LOW);
+
+ sysinfo->enable_igd = 1;
+ sysinfo->enable_peg = 0;
+ break;
+ case HYBRID_GRAPHICS_DISCRETE_ONLY:
+ printk(BIOS_DEBUG, "Activating Discrete Only.\n");
+ set_gpio(MUX_GPIO, GPIO_LEVEL_HIGH);
+ set_gpio(BCL_CTL_GPIO, GPIO_LEVEL_HIGH);
+ set_gpio(GFX_PWR_EN_GPIO, GPIO_LEVEL_HIGH);
+
+ sysinfo->enable_igd = 0;
+ sysinfo->enable_peg = 1;
+ break;
+ case HYBRID_GRAPHICS_SWITCHABLE:
+ printk(BIOS_DEBUG, "Activating Switchable (both GPUs).\n");
+ set_gpio(MUX_GPIO, GPIO_LEVEL_LOW);
+ set_gpio(BCL_CTL_GPIO, GPIO_LEVEL_LOW);
+ set_gpio(GFX_PWR_EN_GPIO, GPIO_LEVEL_HIGH);
+
+ sysinfo->enable_igd = 1;
+ sysinfo->enable_peg = 1;
+ break;
+ }
+}