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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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056996b956
This patch adds lspcon support in dp_dual_mode helper. lspcon is essentially a dp->hdmi dongle with dual personality. LS mode: It works as a passive dongle, by level shifting DP++ signals to HDMI signals, in LS mode. PCON mode: It works as a protocol converter active dongle in pcon mode, by converting DP++ outputs to HDMI 2.0 outputs. This patch adds support for lspcon detection and mode set switch operations, as a dp dual mode dongle. v2: Addressed review comments from Ville - add adaptor id for lspcon devices (0x08), use it to identify lspcon - change function names old: drm_lspcon_get_current_mode/drm_lspcon_change_mode new: drm_lspcon_get_mode/drm_lspcon_set_mode - change drm_lspcon_get_mode type to int, to match drm_dp_dual_mode_get_tmds_output - change 'err' to 'ret' to match the rest of the functions - remove pointless typecasting during call to dual_mode_read - fix the but while setting value of data, while writing lspcon mode - fix indentation - change mdelay(10) -> msleep(10) - return ETIMEDOUT instead of EFAULT, when lspcon mode change times out - Add an empty line to separate std regs macros and lspcon regs macros Indent bit definition v3: Addressed review comments from Rodrigo - change macro name from DP_DUAL_MODE_TYPE_LSPCON to DP_DUAL_MODE_TYPE_HAS_DPCD for better readability - change macro name from DP_DUAL_MODE_LSPCON_MODE_PCON to DP_DUAL_MODE_LSPCON_MODE_PCON for better readability - add comment for MCA specific offsets like 0x40 and 0x41 - remove DP_DUAL_MODE_REV_TYPE2 check while checking lspcon adapter id v4: Addressed review comments from Ville - Fixed indentation at few places - s/current_mode/mode - s/reqd_mode/mode - remove unnecessary void* cast - remove drm_edid.h from includes - Add a comment for _HAS_DPCD - Fix enum description, for lspcon_mode. v5: Rebase v6: Rebase Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1476720277-16298-1-git-send-email-shashank.sharma@intel.com
119 lines
4.4 KiB
C
119 lines
4.4 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef DRM_DP_DUAL_MODE_HELPER_H
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#define DRM_DP_DUAL_MODE_HELPER_H
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#include <linux/types.h>
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/*
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* Optional for type 1 DVI adaptors
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* Mandatory for type 1 HDMI and type 2 adaptors
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*/
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#define DP_DUAL_MODE_HDMI_ID 0x00 /* 00-0f */
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#define DP_DUAL_MODE_HDMI_ID_LEN 16
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/*
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* Optional for type 1 adaptors
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* Mandatory for type 2 adaptors
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*/
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#define DP_DUAL_MODE_ADAPTOR_ID 0x10
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#define DP_DUAL_MODE_REV_MASK 0x07
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#define DP_DUAL_MODE_REV_TYPE2 0x00
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#define DP_DUAL_MODE_TYPE_MASK 0xf0
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#define DP_DUAL_MODE_TYPE_TYPE2 0xa0
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/* This field is marked reserved in dual mode spec, used in LSPCON */
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#define DP_DUAL_MODE_TYPE_HAS_DPCD 0x08
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#define DP_DUAL_MODE_IEEE_OUI 0x11 /* 11-13*/
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#define DP_DUAL_IEEE_OUI_LEN 3
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#define DP_DUAL_DEVICE_ID 0x14 /* 14-19 */
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#define DP_DUAL_DEVICE_ID_LEN 6
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#define DP_DUAL_MODE_HARDWARE_REV 0x1a
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#define DP_DUAL_MODE_FIRMWARE_MAJOR_REV 0x1b
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#define DP_DUAL_MODE_FIRMWARE_MINOR_REV 0x1c
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#define DP_DUAL_MODE_MAX_TMDS_CLOCK 0x1d
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#define DP_DUAL_MODE_I2C_SPEED_CAP 0x1e
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#define DP_DUAL_MODE_TMDS_OEN 0x20
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#define DP_DUAL_MODE_TMDS_DISABLE 0x01
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#define DP_DUAL_MODE_HDMI_PIN_CTRL 0x21
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#define DP_DUAL_MODE_CEC_ENABLE 0x01
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#define DP_DUAL_MODE_I2C_SPEED_CTRL 0x22
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/* LSPCON specific registers, defined by MCA */
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#define DP_DUAL_MODE_LSPCON_MODE_CHANGE 0x40
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#define DP_DUAL_MODE_LSPCON_CURRENT_MODE 0x41
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#define DP_DUAL_MODE_LSPCON_MODE_PCON 0x1
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struct i2c_adapter;
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ssize_t drm_dp_dual_mode_read(struct i2c_adapter *adapter,
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u8 offset, void *buffer, size_t size);
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ssize_t drm_dp_dual_mode_write(struct i2c_adapter *adapter,
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u8 offset, const void *buffer, size_t size);
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/**
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* enum drm_lspcon_mode
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* @lspcon_mode_ls: Level shifter mode of LSPCON
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* which drives DP++ to HDMI 1.4 conversion.
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* @lspcon_mode_pcon: Protocol converter mode of LSPCON
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* which drives DP++ to HDMI 2.0 active conversion.
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*/
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enum drm_lspcon_mode {
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DRM_LSPCON_MODE_INVALID,
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DRM_LSPCON_MODE_LS,
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DRM_LSPCON_MODE_PCON,
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};
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/**
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* enum drm_dp_dual_mode_type - Type of the DP dual mode adaptor
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* @DRM_DP_DUAL_MODE_NONE: No DP dual mode adaptor
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* @DRM_DP_DUAL_MODE_UNKNOWN: Could be either none or type 1 DVI adaptor
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* @DRM_DP_DUAL_MODE_TYPE1_DVI: Type 1 DVI adaptor
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* @DRM_DP_DUAL_MODE_TYPE1_HDMI: Type 1 HDMI adaptor
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* @DRM_DP_DUAL_MODE_TYPE2_DVI: Type 2 DVI adaptor
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* @DRM_DP_DUAL_MODE_TYPE2_HDMI: Type 2 HDMI adaptor
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* @DRM_DP_DUAL_MODE_TYPE2_LSPCON: Level shifter /protocol converter
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*/
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enum drm_dp_dual_mode_type {
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DRM_DP_DUAL_MODE_NONE,
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DRM_DP_DUAL_MODE_UNKNOWN,
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DRM_DP_DUAL_MODE_TYPE1_DVI,
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DRM_DP_DUAL_MODE_TYPE1_HDMI,
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DRM_DP_DUAL_MODE_TYPE2_DVI,
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DRM_DP_DUAL_MODE_TYPE2_HDMI,
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DRM_DP_DUAL_MODE_LSPCON,
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};
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enum drm_dp_dual_mode_type drm_dp_dual_mode_detect(struct i2c_adapter *adapter);
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int drm_dp_dual_mode_max_tmds_clock(enum drm_dp_dual_mode_type type,
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struct i2c_adapter *adapter);
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int drm_dp_dual_mode_get_tmds_output(enum drm_dp_dual_mode_type type,
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struct i2c_adapter *adapter, bool *enabled);
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int drm_dp_dual_mode_set_tmds_output(enum drm_dp_dual_mode_type type,
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struct i2c_adapter *adapter, bool enable);
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const char *drm_dp_get_dual_mode_type_name(enum drm_dp_dual_mode_type type);
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int drm_lspcon_get_mode(struct i2c_adapter *adapter,
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enum drm_lspcon_mode *current_mode);
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int drm_lspcon_set_mode(struct i2c_adapter *adapter,
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enum drm_lspcon_mode reqd_mode);
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#endif
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