mainboard: Add ASRock H81M-HDS

Tested with GRUB 2.02 as a payload, booting Debian GNU/Linux 9.5 with
kernel 4.9.

This board works quite well under coreboot. A list of what works and
what doesn't can be found in the documentation part of this commit.

The file `data.vbt` matches the VBT in the latest stable version of the
vendor firmware (version 2.20).

Change-Id: I53483bb9fa335e86e85dfc487fef03fce4b85e2a
Signed-off-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-on: https://review.coreboot.org/29390
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/mainboard/asrock/h81m-hds/mainboard.c b/src/mainboard/asrock/h81m-hds/mainboard.c
new file mode 100644
index 0000000000..54176c4e90
--- /dev/null
+++ b/src/mainboard/asrock/h81m-hds/mainboard.c
@@ -0,0 +1,29 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 Tristan Corrick <tristan@corrick.kiwi>
+ *
+ * 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <device/device.h>
+#include <drivers/intel/gma/int15.h>
+
+static void mainboard_enable(struct device *dev)
+{
+	install_intel_vga_int15_handler(GMA_INT15_ACTIVE_LFP_NONE,
+					GMA_INT15_PANEL_FIT_DEFAULT,
+					GMA_INT15_BOOT_DISPLAY_DEFAULT, 0);
+}
+
+struct chip_operations mainboard_ops = {
+	.enable_dev = mainboard_enable,
+};