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  1. /*
  2.  * Copyright © 2016 Intel Corporation
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a
  5.  * copy of this software and associated documentation files (the "Software"),
  6.  * to deal in the Software without restriction, including without limitation
  7.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8.  * and/or sell copies of the Software, and to permit persons to whom the
  9.  * Software is furnished to do so, subject to the following conditions:
  10.  *
  11.  * The above copyright notice and this permission notice shall be included in
  12.  * all copies or substantial portions of the Software.
  13.  *
  14.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17.  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18.  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19.  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20.  * OTHER DEALINGS IN THE SOFTWARE.
  21.  */
  22.  
  23. #ifndef DRM_DP_DUAL_MODE_HELPER_H
  24. #define DRM_DP_DUAL_MODE_HELPER_H
  25.  
  26. #include <linux/types.h>
  27.  
  28. /*
  29.  * Optional for type 1 DVI adaptors
  30.  * Mandatory for type 1 HDMI and type 2 adaptors
  31.  */
  32. #define DP_DUAL_MODE_HDMI_ID 0x00 /* 00-0f */
  33. #define  DP_DUAL_MODE_HDMI_ID_LEN 16
  34. /*
  35.  * Optional for type 1 adaptors
  36.  * Mandatory for type 2 adaptors
  37.  */
  38. #define DP_DUAL_MODE_ADAPTOR_ID 0x10
  39. #define  DP_DUAL_MODE_REV_MASK 0x07
  40. #define  DP_DUAL_MODE_REV_TYPE2 0x00
  41. #define  DP_DUAL_MODE_TYPE_MASK 0xf0
  42. #define  DP_DUAL_MODE_TYPE_TYPE2 0xa0
  43. #define DP_DUAL_MODE_IEEE_OUI 0x11 /* 11-13*/
  44. #define  DP_DUAL_IEEE_OUI_LEN 3
  45. #define DP_DUAL_DEVICE_ID 0x14 /* 14-19 */
  46. #define  DP_DUAL_DEVICE_ID_LEN 6
  47. #define DP_DUAL_MODE_HARDWARE_REV 0x1a
  48. #define DP_DUAL_MODE_FIRMWARE_MAJOR_REV 0x1b
  49. #define DP_DUAL_MODE_FIRMWARE_MINOR_REV 0x1c
  50. #define DP_DUAL_MODE_MAX_TMDS_CLOCK 0x1d
  51. #define DP_DUAL_MODE_I2C_SPEED_CAP 0x1e
  52. #define DP_DUAL_MODE_TMDS_OEN 0x20
  53. #define  DP_DUAL_MODE_TMDS_DISABLE 0x01
  54. #define DP_DUAL_MODE_HDMI_PIN_CTRL 0x21
  55. #define  DP_DUAL_MODE_CEC_ENABLE 0x01
  56. #define DP_DUAL_MODE_I2C_SPEED_CTRL 0x22
  57.  
  58. struct i2c_adapter;
  59.  
  60. ssize_t drm_dp_dual_mode_read(struct i2c_adapter *adapter,
  61.                               u8 offset, void *buffer, size_t size);
  62. ssize_t drm_dp_dual_mode_write(struct i2c_adapter *adapter,
  63.                                u8 offset, const void *buffer, size_t size);
  64.  
  65. /**
  66.  * enum drm_dp_dual_mode_type - Type of the DP dual mode adaptor
  67.  * @DRM_DP_DUAL_MODE_NONE: No DP dual mode adaptor
  68.  * @DRM_DP_DUAL_MODE_UNKNOWN: Could be either none or type 1 DVI adaptor
  69.  * @DRM_DP_DUAL_MODE_TYPE1_DVI: Type 1 DVI adaptor
  70.  * @DRM_DP_DUAL_MODE_TYPE1_HDMI: Type 1 HDMI adaptor
  71.  * @DRM_DP_DUAL_MODE_TYPE2_DVI: Type 2 DVI adaptor
  72.  * @DRM_DP_DUAL_MODE_TYPE2_HDMI: Type 2 HDMI adaptor
  73.  */
  74. enum drm_dp_dual_mode_type {
  75.         DRM_DP_DUAL_MODE_NONE,
  76.         DRM_DP_DUAL_MODE_UNKNOWN,
  77.         DRM_DP_DUAL_MODE_TYPE1_DVI,
  78.         DRM_DP_DUAL_MODE_TYPE1_HDMI,
  79.         DRM_DP_DUAL_MODE_TYPE2_DVI,
  80.         DRM_DP_DUAL_MODE_TYPE2_HDMI,
  81. };
  82.  
  83. enum drm_dp_dual_mode_type drm_dp_dual_mode_detect(struct i2c_adapter *adapter);
  84. int drm_dp_dual_mode_max_tmds_clock(enum drm_dp_dual_mode_type type,
  85.                                     struct i2c_adapter *adapter);
  86. int drm_dp_dual_mode_get_tmds_output(enum drm_dp_dual_mode_type type,
  87.                                      struct i2c_adapter *adapter, bool *enabled);
  88. int drm_dp_dual_mode_set_tmds_output(enum drm_dp_dual_mode_type type,
  89.                                      struct i2c_adapter *adapter, bool enable);
  90. const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type);
  91.  
  92. #endif
  93.