1 /* $NetBSD: drm_dp_dual_mode_helper.h,v 1.2 2021/12/18 23:45:45 riastradh Exp $ */ 2 3 /* 4 * Copyright 2016 Intel Corporation 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 #ifndef DRM_DP_DUAL_MODE_HELPER_H 26 #define DRM_DP_DUAL_MODE_HELPER_H 27 28 #include <linux/types.h> 29 30 /* 31 * Optional for type 1 DVI adaptors 32 * Mandatory for type 1 HDMI and type 2 adaptors 33 */ 34 #define DP_DUAL_MODE_HDMI_ID 0x00 /* 00-0f */ 35 #define DP_DUAL_MODE_HDMI_ID_LEN 16 36 /* 37 * Optional for type 1 adaptors 38 * Mandatory for type 2 adaptors 39 */ 40 #define DP_DUAL_MODE_ADAPTOR_ID 0x10 41 #define DP_DUAL_MODE_REV_MASK 0x07 42 #define DP_DUAL_MODE_REV_TYPE2 0x00 43 #define DP_DUAL_MODE_TYPE_MASK 0xf0 44 #define DP_DUAL_MODE_TYPE_TYPE2 0xa0 45 /* This field is marked reserved in dual mode spec, used in LSPCON */ 46 #define DP_DUAL_MODE_TYPE_HAS_DPCD 0x08 47 #define DP_DUAL_MODE_IEEE_OUI 0x11 /* 11-13*/ 48 #define DP_DUAL_IEEE_OUI_LEN 3 49 #define DP_DUAL_DEVICE_ID 0x14 /* 14-19 */ 50 #define DP_DUAL_DEVICE_ID_LEN 6 51 #define DP_DUAL_MODE_HARDWARE_REV 0x1a 52 #define DP_DUAL_MODE_FIRMWARE_MAJOR_REV 0x1b 53 #define DP_DUAL_MODE_FIRMWARE_MINOR_REV 0x1c 54 #define DP_DUAL_MODE_MAX_TMDS_CLOCK 0x1d 55 #define DP_DUAL_MODE_I2C_SPEED_CAP 0x1e 56 #define DP_DUAL_MODE_TMDS_OEN 0x20 57 #define DP_DUAL_MODE_TMDS_DISABLE 0x01 58 #define DP_DUAL_MODE_HDMI_PIN_CTRL 0x21 59 #define DP_DUAL_MODE_CEC_ENABLE 0x01 60 #define DP_DUAL_MODE_I2C_SPEED_CTRL 0x22 61 62 /* LSPCON specific registers, defined by MCA */ 63 #define DP_DUAL_MODE_LSPCON_MODE_CHANGE 0x40 64 #define DP_DUAL_MODE_LSPCON_CURRENT_MODE 0x41 65 #define DP_DUAL_MODE_LSPCON_MODE_PCON 0x1 66 67 struct i2c_adapter; 68 69 ssize_t drm_dp_dual_mode_read(struct i2c_adapter *adapter, 70 u8 offset, void *buffer, size_t size); 71 ssize_t drm_dp_dual_mode_write(struct i2c_adapter *adapter, 72 u8 offset, const void *buffer, size_t size); 73 74 /** 75 * enum drm_lspcon_mode 76 * @DRM_LSPCON_MODE_INVALID: No LSPCON. 77 * @DRM_LSPCON_MODE_LS: Level shifter mode of LSPCON 78 * which drives DP++ to HDMI 1.4 conversion. 79 * @DRM_LSPCON_MODE_PCON: Protocol converter mode of LSPCON 80 * which drives DP++ to HDMI 2.0 active conversion. 81 */ 82 enum drm_lspcon_mode { 83 DRM_LSPCON_MODE_INVALID, 84 DRM_LSPCON_MODE_LS, 85 DRM_LSPCON_MODE_PCON, 86 }; 87 88 /** 89 * enum drm_dp_dual_mode_type - Type of the DP dual mode adaptor 90 * @DRM_DP_DUAL_MODE_NONE: No DP dual mode adaptor 91 * @DRM_DP_DUAL_MODE_UNKNOWN: Could be either none or type 1 DVI adaptor 92 * @DRM_DP_DUAL_MODE_TYPE1_DVI: Type 1 DVI adaptor 93 * @DRM_DP_DUAL_MODE_TYPE1_HDMI: Type 1 HDMI adaptor 94 * @DRM_DP_DUAL_MODE_TYPE2_DVI: Type 2 DVI adaptor 95 * @DRM_DP_DUAL_MODE_TYPE2_HDMI: Type 2 HDMI adaptor 96 * @DRM_DP_DUAL_MODE_LSPCON: Level shifter / protocol converter 97 */ 98 enum drm_dp_dual_mode_type { 99 DRM_DP_DUAL_MODE_NONE, 100 DRM_DP_DUAL_MODE_UNKNOWN, 101 DRM_DP_DUAL_MODE_TYPE1_DVI, 102 DRM_DP_DUAL_MODE_TYPE1_HDMI, 103 DRM_DP_DUAL_MODE_TYPE2_DVI, 104 DRM_DP_DUAL_MODE_TYPE2_HDMI, 105 DRM_DP_DUAL_MODE_LSPCON, 106 }; 107 108 enum drm_dp_dual_mode_type drm_dp_dual_mode_detect(struct i2c_adapter *adapter); 109 int drm_dp_dual_mode_max_tmds_clock(enum drm_dp_dual_mode_type type, 110 struct i2c_adapter *adapter); 111 int drm_dp_dual_mode_get_tmds_output(enum drm_dp_dual_mode_type type, 112 struct i2c_adapter *adapter, bool *enabled); 113 int drm_dp_dual_mode_set_tmds_output(enum drm_dp_dual_mode_type type, 114 struct i2c_adapter *adapter, bool enable); 115 const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type); 116 117 int drm_lspcon_get_mode(struct i2c_adapter *adapter, 118 enum drm_lspcon_mode *current_mode); 119 int drm_lspcon_set_mode(struct i2c_adapter *adapter, 120 enum drm_lspcon_mode reqd_mode); 121 #endif 122
Indexes created Sat Sep 20 22:09:52 GMT 2025