include/drm/drm_dp_dual_mode_helper.h

   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