drivers/intel/gma: put controller in separate header

Including i915.h just for the GMA/SSDT related functions means
dragging along all of i915_reg.h as well, which is problematic
since some platforms (like Apollo Lake) use overlapping symbols.
To avoid this conflict, break out the GMA/SSDT bits into their
own header which can be included without conflict.

Change-Id: I73fb7ef01abaafdcdbc44f1e3f5eb1883fc31616
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40592
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/drivers/intel/gma/gma.h b/src/drivers/intel/gma/gma.h
new file mode 100644
index 0000000000..7d20e6beff
--- /dev/null
+++ b/src/drivers/intel/gma/gma.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#ifndef _GMA_H_
+#define _GMA_H_
+
+#include <stdint.h>
+
+struct i915_gpu_controller_info {
+	int use_spread_spectrum_clock;
+	int ndid;
+	u32 did[5];
+};
+
+#define GMA_STATIC_DISPLAYS(ssc) {			\
+	.use_spread_spectrum_clock = (ssc),		\
+	.ndid = 3, .did = { 0x0100, 0x0240, 0x0410, }	\
+}
+
+void drivers_intel_gma_displays_ssdt_generate(const struct i915_gpu_controller_info *conf);
+
+#endif