1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_pch.h b/drivers/gpu/drm/i915/display/intel_pch.h
new file mode 100644
index 000000000000..cf4dab1b98bf
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_pch.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright 2025 Intel Corporation.
+ */
+
+#ifndef __INTEL_PCH__
+#define __INTEL_PCH__
+
+#include "intel_display_conversion.h"
+
+struct intel_display;
+
+/*
+ * Sorted by south display engine compatibility.
+ * If the new PCH comes with a south display engine that is not
+ * inherited from the latest item, please do not add it to the
+ * end. Instead, add it right after its "parent" PCH.
+ */
+enum intel_pch {
+	PCH_NOP = -1,	/* PCH without south display */
+	PCH_NONE = 0,	/* No PCH present */
+	PCH_IBX,	/* Ibexpeak PCH */
+	PCH_CPT,	/* Cougarpoint/Pantherpoint PCH */
+	PCH_LPT_H,	/* Lynxpoint/Wildcatpoint H PCH */
+	PCH_LPT_LP,	/* Lynxpoint/Wildcatpoint LP PCH */
+	PCH_SPT,        /* Sunrisepoint/Kaby Lake PCH */
+	PCH_CNP,        /* Cannon/Comet Lake PCH */
+	PCH_ICP,	/* Ice Lake/Jasper Lake PCH */
+	PCH_TGP,	/* Tiger Lake/Mule Creek Canyon PCH */
+	PCH_ADP,	/* Alder Lake PCH */
+
+	/* Fake PCHs, functionality handled on the same PCI dev */
+	PCH_DG1 = 1024,
+	PCH_DG2,
+	PCH_MTL,
+	PCH_LNL,
+};
+
+#define INTEL_PCH_TYPE(_display)		(__to_intel_display(_display)->pch_type)
+#define HAS_PCH_DG2(display)			(INTEL_PCH_TYPE(display) == PCH_DG2)
+#define HAS_PCH_ADP(display)			(INTEL_PCH_TYPE(display) == PCH_ADP)
+#define HAS_PCH_DG1(display)			(INTEL_PCH_TYPE(display) == PCH_DG1)
+#define HAS_PCH_TGP(display)			(INTEL_PCH_TYPE(display) == PCH_TGP)
+#define HAS_PCH_ICP(display)			(INTEL_PCH_TYPE(display) == PCH_ICP)
+#define HAS_PCH_CNP(display)			(INTEL_PCH_TYPE(display) == PCH_CNP)
+#define HAS_PCH_SPT(display)			(INTEL_PCH_TYPE(display) == PCH_SPT)
+#define HAS_PCH_LPT_H(display)			(INTEL_PCH_TYPE(display) == PCH_LPT_H)
+#define HAS_PCH_LPT_LP(display)			(INTEL_PCH_TYPE(display) == PCH_LPT_LP)
+#define HAS_PCH_LPT(display)			(INTEL_PCH_TYPE(display) == PCH_LPT_H || \
+						 INTEL_PCH_TYPE(display) == PCH_LPT_LP)
+#define HAS_PCH_CPT(display)			(INTEL_PCH_TYPE(display) == PCH_CPT)
+#define HAS_PCH_IBX(display)			(INTEL_PCH_TYPE(display) == PCH_IBX)
+#define HAS_PCH_NOP(display)			(INTEL_PCH_TYPE(display) == PCH_NOP)
+#define HAS_PCH_SPLIT(display)			(INTEL_PCH_TYPE(display) != PCH_NONE)
+
+void intel_pch_detect(struct intel_display *display);
+
+#endif /* __INTEL_PCH__ */