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