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TOMOYO Linux Cross Reference
Linux/include/drm/drm_dp_dual_mode_helper.h

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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 /* This field is marked reserved in dual mode spec, used in LSPCON */
 44 #define  DP_DUAL_MODE_TYPE_HAS_DPCD 0x08
 45 #define DP_DUAL_MODE_IEEE_OUI 0x11 /* 11-13*/
 46 #define  DP_DUAL_IEEE_OUI_LEN 3
 47 #define DP_DUAL_DEVICE_ID 0x14 /* 14-19 */
 48 #define  DP_DUAL_DEVICE_ID_LEN 6
 49 #define DP_DUAL_MODE_HARDWARE_REV 0x1a
 50 #define DP_DUAL_MODE_FIRMWARE_MAJOR_REV 0x1b
 51 #define DP_DUAL_MODE_FIRMWARE_MINOR_REV 0x1c
 52 #define DP_DUAL_MODE_MAX_TMDS_CLOCK 0x1d
 53 #define DP_DUAL_MODE_I2C_SPEED_CAP 0x1e
 54 #define DP_DUAL_MODE_TMDS_OEN 0x20
 55 #define  DP_DUAL_MODE_TMDS_DISABLE 0x01
 56 #define DP_DUAL_MODE_HDMI_PIN_CTRL 0x21
 57 #define  DP_DUAL_MODE_CEC_ENABLE 0x01
 58 #define DP_DUAL_MODE_I2C_SPEED_CTRL 0x22
 59 
 60 /* LSPCON specific registers, defined by MCA */
 61 #define DP_DUAL_MODE_LSPCON_MODE_CHANGE         0x40
 62 #define DP_DUAL_MODE_LSPCON_CURRENT_MODE                0x41
 63 #define  DP_DUAL_MODE_LSPCON_MODE_PCON                  0x1
 64 
 65 struct i2c_adapter;
 66 
 67 ssize_t drm_dp_dual_mode_read(struct i2c_adapter *adapter,
 68                               u8 offset, void *buffer, size_t size);
 69 ssize_t drm_dp_dual_mode_write(struct i2c_adapter *adapter,
 70                                u8 offset, const void *buffer, size_t size);
 71 
 72 /**
 73  * enum drm_lspcon_mode
 74  * @DRM_LSPCON_MODE_INVALID: No LSPCON.
 75  * @DRM_LSPCON_MODE_LS: Level shifter mode of LSPCON
 76  *      which drives DP++ to HDMI 1.4 conversion.
 77  * @DRM_LSPCON_MODE_PCON: Protocol converter mode of LSPCON
 78  *      which drives DP++ to HDMI 2.0 active conversion.
 79  */
 80 enum drm_lspcon_mode {
 81         DRM_LSPCON_MODE_INVALID,
 82         DRM_LSPCON_MODE_LS,
 83         DRM_LSPCON_MODE_PCON,
 84 };
 85 
 86 /**
 87  * enum drm_dp_dual_mode_type - Type of the DP dual mode adaptor
 88  * @DRM_DP_DUAL_MODE_NONE: No DP dual mode adaptor
 89  * @DRM_DP_DUAL_MODE_UNKNOWN: Could be either none or type 1 DVI adaptor
 90  * @DRM_DP_DUAL_MODE_TYPE1_DVI: Type 1 DVI adaptor
 91  * @DRM_DP_DUAL_MODE_TYPE1_HDMI: Type 1 HDMI adaptor
 92  * @DRM_DP_DUAL_MODE_TYPE2_DVI: Type 2 DVI adaptor
 93  * @DRM_DP_DUAL_MODE_TYPE2_HDMI: Type 2 HDMI adaptor
 94  * @DRM_DP_DUAL_MODE_LSPCON: Level shifter / protocol converter
 95  */
 96 enum drm_dp_dual_mode_type {
 97         DRM_DP_DUAL_MODE_NONE,
 98         DRM_DP_DUAL_MODE_UNKNOWN,
 99         DRM_DP_DUAL_MODE_TYPE1_DVI,
100         DRM_DP_DUAL_MODE_TYPE1_HDMI,
101         DRM_DP_DUAL_MODE_TYPE2_DVI,
102         DRM_DP_DUAL_MODE_TYPE2_HDMI,
103         DRM_DP_DUAL_MODE_LSPCON,
104 };
105 
106 enum drm_dp_dual_mode_type drm_dp_dual_mode_detect(struct i2c_adapter *adapter);
107 int drm_dp_dual_mode_max_tmds_clock(enum drm_dp_dual_mode_type type,
108                                     struct i2c_adapter *adapter);
109 int drm_dp_dual_mode_get_tmds_output(enum drm_dp_dual_mode_type type,
110                                      struct i2c_adapter *adapter, bool *enabled);
111 int drm_dp_dual_mode_set_tmds_output(enum drm_dp_dual_mode_type type,
112                                      struct i2c_adapter *adapter, bool enable);
113 const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type);
114 
115 int drm_lspcon_get_mode(struct i2c_adapter *adapter,
116                         enum drm_lspcon_mode *current_mode);
117 int drm_lspcon_set_mode(struct i2c_adapter *adapter,
118                         enum drm_lspcon_mode reqd_mode);
119 #endif
120 

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