radeon_hd: Drop dp config array from dp_info

* Caching these values could result in missed
  state changes.
* We may want to re-implement later.
* Highlights that all DP AUX communication is broken
  during my testing.

headers/private/graphics/common/dp.h

@@ -19,10 +19,9 @@ typedef struct {
 	// Required configuration
 	bool	valid;			// Is valid DP information
 	uint32	auxPin;			// Normally GPIO pin on GPU
+	uint8	revision;		// DP Revision from DPCD
 
-	uint8	config[DP_DPCD_SIZE]; // DP Configuration Data
 	int		laneCount;
-
 	uint32	linkRate;		// DP Link Speed 162000, 270000, 540000
 
 	// Internal State information
@@ -45,9 +44,6 @@ typedef struct {
 uint32 dp_encode_link_rate(uint32 linkRate);
 uint32 dp_decode_link_rate(uint32 rawLinkRate);
 
-uint32 dp_get_lane_count_max(dp_info* dpInfo);
-uint32 dp_get_link_rate_max(dp_info* dpInfo);
-
 uint32 dp_get_pixel_clock_max(int linkRate, int laneCount, int bpp);
 
 

headers/private/graphics/common/dp_raw.h

@@ -42,6 +42,7 @@
 #define DP_DPCD_REV_MAJOR_MASK				(15 << 4)	// Int
 #define DP_DPCD_REV_10						0x0010		// Value
 #define DP_DPCD_REV_11						0x0011		// Value
+#define DP_DPCD_REV_12						0x0012		// Value
 // DP Maximum Link Rate (0x1)
 #define DP_MAX_LINK_RATE					0x0001		// Reg
 // Use DP_LINK_RATE_* for speed.