1 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/bios/dcb.h b/drivers/gpu/drm/nouveau/core/include/subdev/bios/dcb.h
new file mode 100644
index 000000000000..d682fb625833
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/bios/dcb.h
@@ -0,0 +1,90 @@
+#ifndef __NVBIOS_DCB_H__
+#define __NVBIOS_DCB_H__
+
+struct nouveau_bios;
+
+enum dcb_output_type {
+	DCB_OUTPUT_ANALOG	= 0x0,
+	DCB_OUTPUT_TV		= 0x1,
+	DCB_OUTPUT_TMDS		= 0x2,
+	DCB_OUTPUT_LVDS		= 0x3,
+	DCB_OUTPUT_DP		= 0x6,
+	DCB_OUTPUT_EOL		= 0xe,
+	DCB_OUTPUT_UNUSED	= 0xf,
+	DCB_OUTPUT_ANY = -1,
+};
+
+struct dcb_output {
+	int index;	/* may not be raw dcb index if merging has happened */
+	enum dcb_output_type type;
+	uint8_t i2c_index;
+	uint8_t heads;
+	uint8_t connector;
+	uint8_t bus;
+	uint8_t location;
+	uint8_t or;
+	bool duallink_possible;
+	union {
+		struct sor_conf {
+			int link;
+		} sorconf;
+		struct {
+			int maxfreq;
+		} crtconf;
+		struct {
+			struct sor_conf sor;
+			bool use_straps_for_mode;
+			bool use_acpi_for_edid;
+			bool use_power_scripts;
+		} lvdsconf;
+		struct {
+			bool has_component_output;
+		} tvconf;
+		struct {
+			struct sor_conf sor;
+			int link_nr;
+			int link_bw;
+		} dpconf;
+		struct {
+			struct sor_conf sor;
+			int slave_addr;
+		} tmdsconf;
+	};
+	bool i2c_upper_default;
+};
+
+u16 dcb_table(struct nouveau_bios *, u8 *ver, u8 *hdr, u8 *ent, u8 *len);
+u16 dcb_outp(struct nouveau_bios *, u8 idx, u8 *ver, u8 *len);
+int dcb_outp_foreach(struct nouveau_bios *, void *data, int (*exec)
+		     (struct nouveau_bios *, void *, int index, u16 entry));
+
+
+/* BIT 'U'/'d' table encoder subtables have hashes matching them to
+ * a particular set of encoders.
+ *
+ * This function returns true if a particular DCB entry matches.
+ */
+static inline bool
+dcb_hash_match(struct dcb_output *dcb, u32 hash)
+{
+	if ((hash & 0x000000f0) != (dcb->location << 4))
+		return false;
+	if ((hash & 0x0000000f) != dcb->type)
+		return false;
+	if (!(hash & (dcb->or << 16)))
+		return false;
+
+	switch (dcb->type) {
+	case DCB_OUTPUT_TMDS:
+	case DCB_OUTPUT_LVDS:
+	case DCB_OUTPUT_DP:
+		if (hash & 0x00c00000) {
+			if (!(hash & (dcb->sorconf.link << 22)))
+				return false;
+		}
+	default:
+		return true;
+	}
+}
+
+#endif