name : drm_dp_dual_mode_helper.h /* * Copyright © 2016 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #ifndef DRM_DP_DUAL_MODE_HELPER_H #define DRM_DP_DUAL_MODE_HELPER_H #include <linux/types.h> /* * Optional for type 1 DVI adaptors * Mandatory for type 1 HDMI and type 2 adaptors */ #define DP_DUAL_MODE_HDMI_ID 0x00 /* 00-0f */ #define DP_DUAL_MODE_HDMI_ID_LEN 16 /* * Optional for type 1 adaptors * Mandatory for type 2 adaptors */ #define DP_DUAL_MODE_ADAPTOR_ID 0x10 #define DP_DUAL_MODE_REV_MASK 0x07 #define DP_DUAL_MODE_REV_TYPE2 0x00 #define DP_DUAL_MODE_TYPE_MASK 0xf0 #define DP_DUAL_MODE_TYPE_TYPE2 0xa0 /* This field is marked reserved in dual mode spec, used in LSPCON */ #define DP_DUAL_MODE_TYPE_HAS_DPCD 0x08 #define DP_DUAL_MODE_IEEE_OUI 0x11 /* 11-13*/ #define DP_DUAL_IEEE_OUI_LEN 3 #define DP_DUAL_DEVICE_ID 0x14 /* 14-19 */ #define DP_DUAL_DEVICE_ID_LEN 6 #define DP_DUAL_MODE_HARDWARE_REV 0x1a #define DP_DUAL_MODE_FIRMWARE_MAJOR_REV 0x1b #define DP_DUAL_MODE_FIRMWARE_MINOR_REV 0x1c #define DP_DUAL_MODE_MAX_TMDS_CLOCK 0x1d #define DP_DUAL_MODE_I2C_SPEED_CAP 0x1e #define DP_DUAL_MODE_TMDS_OEN 0x20 #define DP_DUAL_MODE_TMDS_DISABLE 0x01 #define DP_DUAL_MODE_HDMI_PIN_CTRL 0x21 #define DP_DUAL_MODE_CEC_ENABLE 0x01 #define DP_DUAL_MODE_I2C_SPEED_CTRL 0x22 /* LSPCON specific registers, defined by MCA */ #define DP_DUAL_MODE_LSPCON_MODE_CHANGE 0x40 #define DP_DUAL_MODE_LSPCON_CURRENT_MODE 0x41 #define DP_DUAL_MODE_LSPCON_MODE_PCON 0x1 struct drm_device; struct i2c_adapter; ssize_t drm_dp_dual_mode_read(struct i2c_adapter *adapter, u8 offset, void *buffer, size_t size); ssize_t drm_dp_dual_mode_write(struct i2c_adapter *adapter, u8 offset, const void *buffer, size_t size); /** * enum drm_lspcon_mode * @DRM_LSPCON_MODE_INVALID: No LSPCON. * @DRM_LSPCON_MODE_LS: Level shifter mode of LSPCON * which drives DP++ to HDMI 1.4 conversion. * @DRM_LSPCON_MODE_PCON: Protocol converter mode of LSPCON * which drives DP++ to HDMI 2.0 active conversion. */ enum drm_lspcon_mode { DRM_LSPCON_MODE_INVALID, DRM_LSPCON_MODE_LS, DRM_LSPCON_MODE_PCON, }; /** * enum drm_dp_dual_mode_type - Type of the DP dual mode adaptor * @DRM_DP_DUAL_MODE_NONE: No DP dual mode adaptor * @DRM_DP_DUAL_MODE_UNKNOWN: Could be either none or type 1 DVI adaptor * @DRM_DP_DUAL_MODE_TYPE1_DVI: Type 1 DVI adaptor * @DRM_DP_DUAL_MODE_TYPE1_HDMI: Type 1 HDMI adaptor * @DRM_DP_DUAL_MODE_TYPE2_DVI: Type 2 DVI adaptor * @DRM_DP_DUAL_MODE_TYPE2_HDMI: Type 2 HDMI adaptor * @DRM_DP_DUAL_MODE_LSPCON: Level shifter / protocol converter */ enum drm_dp_dual_mode_type { DRM_DP_DUAL_MODE_NONE, DRM_DP_DUAL_MODE_UNKNOWN, DRM_DP_DUAL_MODE_TYPE1_DVI, DRM_DP_DUAL_MODE_TYPE1_HDMI, DRM_DP_DUAL_MODE_TYPE2_DVI, DRM_DP_DUAL_MODE_TYPE2_HDMI, DRM_DP_DUAL_MODE_LSPCON, }; enum drm_dp_dual_mode_type drm_dp_dual_mode_detect(const struct drm_device *dev, struct i2c_adapter *adapter); int drm_dp_dual_mode_max_tmds_clock(const struct drm_device *dev, enum drm_dp_dual_mode_type type, struct i2c_adapter *adapter); int drm_dp_dual_mode_get_tmds_output(const struct drm_device *dev, enum drm_dp_dual_mode_type type, struct i2c_adapter *adapter, bool *enabled); int drm_dp_dual_mode_set_tmds_output(const struct drm_device *dev, enum drm_dp_dual_mode_type type, struct i2c_adapter *adapter, bool enable); const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type); int drm_lspcon_get_mode(const struct drm_device *dev, struct i2c_adapter *adapter, enum drm_lspcon_mode *current_mode); int drm_lspcon_set_mode(const struct drm_device *dev, struct i2c_adapter *adapter, enum drm_lspcon_mode reqd_mode); #endif