headers/private/graphics/common/dp.h

   1 /*
   2  * Copyright 2012 Haiku, Inc. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *      Alexander von Gluck, kallisti5@unixzen.com
   7  */
   8 #ifndef _DP_H
   9 #define _DP_H
  10
  11
  12 #include <Accelerant.h>
  13 #include "dp_raw.h"
  14 #include <GraphicsDefs.h>
  15 #include <OS.h>
  16
  17
  18 typedef struct {
  19         // Required configuration
  20         bool    valid;                  // Is valid DP information
  21         uint32  auxPin;                 // Normally GPIO pin on GPU
  22         uint8   revision;               // DP Revision from DPCD
  23
  24         int             laneCount;
  25         uint32  linkRate;               // DP Link Speed 162000, 270000, 540000
  26
  27         // Internal State information
  28         uint8   linkStatus[DP_LINK_STATUS_SIZE];
  29
  30         uint8   trainingAttempts;
  31         uint8   trainingSet[4];
  32         int     trainingReadInterval;
  33
  34 } dp_info;
  35
  36 typedef struct {
  37         uint16  address;
  38         uint8   request;
  39         uint8   reply;
  40         void*   buffer;
  41         size_t  size;
  42 } dp_aux_msg;
  43
  44 uint32 dp_encode_link_rate(uint32 linkRate);
  45 uint32 dp_decode_link_rate(uint32 rawLinkRate);
  46
  47 uint32 dp_get_pixel_clock_max(int linkRate, int laneCount, int bpp);
  48
  49
  50 #endif /* _DP_H */