drm/xe/display: Implement display support

As for display, the intent is to share the display code with the i915
driver so that there is maximum reuse there.

We do this by recompiling i915/display code twice.
Now that i915 has been adapted to support the Xe build, we can add
the xe/display support.

This initial work is a collaboration of many people and unfortunately
this squashed patch won't fully honor the proper credits.
But let's try to add a few from the squashed patches:

Co-developed-by: Matthew Brost <matthew.brost@intel.com>
Co-developed-by: Jani Nikula <jani.nikula@intel.com>
Co-developed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Co-developed-by: Matt Roper <matthew.d.roper@intel.com>
Co-developed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Co-developed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Co-developed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/compat-i915-headers/intel_pcode.h b/drivers/gpu/drm/xe/compat-i915-headers/intel_pcode.h
new file mode 100644
index 000000000000..0c47661bdc6a
--- /dev/null
+++ b/drivers/gpu/drm/xe/compat-i915-headers/intel_pcode.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef __INTEL_PCODE_H__
+#define __INTEL_PCODE_H__
+
+#include "intel_uncore.h"
+#include "xe_pcode.h"
+
+static inline int
+snb_pcode_write_timeout(struct intel_uncore *uncore, u32 mbox, u32 val,
+			int fast_timeout_us, int slow_timeout_ms)
+{
+	return xe_pcode_write_timeout(__compat_uncore_to_gt(uncore), mbox, val,
+				      slow_timeout_ms ?: 1);
+}
+
+static inline int
+snb_pcode_write(struct intel_uncore *uncore, u32 mbox, u32 val)
+{
+
+	return xe_pcode_write(__compat_uncore_to_gt(uncore), mbox, val);
+}
+
+static inline int
+snb_pcode_read(struct intel_uncore *uncore, u32 mbox, u32 *val, u32 *val1)
+{
+	return xe_pcode_read(__compat_uncore_to_gt(uncore), mbox, val, val1);
+}
+
+static inline int
+skl_pcode_request(struct intel_uncore *uncore, u32 mbox,
+		  u32 request, u32 reply_mask, u32 reply,
+		  int timeout_base_ms)
+{
+	return xe_pcode_request(__compat_uncore_to_gt(uncore), mbox, request, reply_mask, reply,
+				timeout_base_ms);
+}
+
+#endif /* __INTEL_PCODE_H__ */